A skid-mounted mini fishery wastewater treatment integrated device

Abstract

The present application relates to a kind of pry-mounted type micro fishery wastewater treatment integrated equipment without civil engineering, it relates to wastewater treatment equipment technical field.The integrated equipment includes integrated integrated box, water inlet unit, in-situ electrolysis chlorine production treatment unit, automatic control unit, water outlet unit;The present application integrates all processing units in integrated box, without constructing any supporting civil engineering, can be directly transported to field and immediately put into use after connecting power supply and water pipe, realize the rapid deployment without civil engineering;Before in-situ electrolysis chlorine production treatment unit water inlet front, after water inlet filter screen, flocculating agent aqueous solution is added in pipeline, after being fully mixed with fishery wastewater, into electrolytic cell;Flocculating agent is prepared by acrylic acid-maleic acid copolymer, diethylenetriamine, N, N-dimethylformamide, 1-(3-dimethylaminopropyl)-3-ethyl carbodiimide hydrochloride;The present application has low COD concentration of effluent, low ammonia nitrogen concentration of effluent, and good wastewater treatment effect.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment equipment technology, and in particular to a skid-mounted, civil engineering-free, integrated micro-scale aquaculture wastewater treatment equipment. Background Technology

[0002] my country's coastal fishing villages have a large-scale seafood primary processing industry, which generates a large amount of special wastewater every year containing high concentrations of organic matter, high salinity, and blood. If this wastewater is discharged directly into nearshore waters without treatment, it will cause serious pollution to the nearshore ecological environment and violate the "Water Pollution Prevention and Control Law of the People's Republic of China" and relevant local environmental protection regulations.

[0003] Chinese Patent CN217127213U discloses a shared fishery wastewater treatment device, comprising an outer shell, inside which are arranged in sequence an aerobic nitrification tank, a deoxygenation tank, a denitrification tank, an oxygenation tank, a disinfection tank, a phosphorus absorption tank, and a carbon filter. The aerobic nitrification tank is connected to an inlet, and the carbon filter is connected to an outlet. The aerobic nitrification tank, deoxygenation tank, denitrification tank, and oxygenation tank are respectively equipped with suspended biological packing material for microbial reproduction to form a biofilm to decompose organic matter in the water. The disinfection tank is equipped with a disinfection device. The phosphorus absorption tank is equipped with phosphorus absorption packing material to adsorb phosphorus in the water. The carbon filter is equipped with activated carbon to adsorb impurities in the water. The outer shell is equipped with an aeration device for increasing the dissolved oxygen concentration in the aerobic nitrification tank and the oxygenation tank, a deoxygenation device for reducing the dissolved oxygen in the deoxygenation tank, a dosing device for adding algaecide to the deoxygenation tank, and a water pump for accelerating the flow of water in the denitrification tank to generate nitrogen gas for escape.

[0004] Chinese Patent CN118652014A relates to the field of fishery wastewater treatment and discloses a wastewater purification device and its usage method for fishery. The device includes a first treatment chamber, a second treatment chamber fixedly connected to the bottom of the first treatment chamber, a grid mesh cylinder movably connected inside the first treatment chamber, a conveying pipe fixedly connected to one side of the first treatment chamber, a reduction motor fixedly installed at the end of the conveying pipe, the drive end of the reduction motor extending into the inside of the conveying pipe and fixedly connected to a rotating rod, and a spiral conveying blade fixedly connected to the outer diameter of the rotating rod.

[0005] The existing technology has the following three main shortcomings: First, the cost of infrastructure investment is high. Existing industrial wastewater treatment systems typically require the pre-construction of supporting civil engineering works such as sedimentation tanks, equalization tanks, independent electrical control rooms, and dedicated pipelines at the site of use. The cost of these projects usually ranges from hundreds of thousands to millions of yuan, far exceeding the economic affordability of individual households and small fishery cooperatives in coastal fishing villages. This has led to a situation where many fishing villages are unable to afford the construction of wastewater treatment facilities.

[0006] Secondly, traditional biochemical processes are poorly adapted to high-salt environments. Existing biochemical treatment processes mainly rely on microbial communities to degrade organic pollutants in wastewater. However, the sodium chloride content in seafood primary processing wastewater is usually as high as 10-30 grams per liter. High-salt environments have a significant inhibitory effect on microbial activity, resulting in unstable treatment effects. Furthermore, large amounts of chemical agents are required for auxiliary treatment, increasing operating costs and the risk of secondary pollution.

[0007] Third, equipment operation and maintenance rely on professional personnel. When treating high-salinity wastewater, existing electrocatalytic wastewater treatment equipment experiences continuous deposition and scaling of large amounts of calcium and magnesium ions on the electrode surface, leading to a reduction in the effective electrode area and increased energy consumption. Regular acid washing maintenance by professional technicians is required. However, coastal fishing villages generally lack qualified operation and maintenance personnel, resulting in the long-standing problem of "poor equipment performance and difficult maintenance".

[0008] In summary, existing technologies cannot effectively address the three core pain points of "unaffordable construction, poor usability, and difficult maintenance" in the treatment of seafood primary processing wastewater in coastal fishing villages. There is an urgent need for a new type of wastewater treatment equipment that is compact in structure, requires no civil engineering, is adaptable to high-salt environments, and is easy to operate and maintain. Summary of the Invention

[0009] To address the aforementioned problems, this invention provides a skid-mounted, civil engineering-free integrated micro-scale aquaculture wastewater treatment device. The integrated device includes an integrated housing, an inlet unit, an in-situ electrolytic chlorine production treatment unit, an automatic control unit, and an outlet unit.

[0010] Optionally, the integrated enclosure is a rectangular anti-corrosion metal enclosure structure. The interior of the enclosure is divided into two functional areas by a partition: an equipment installation area and an electrical control installation area. The four corners of the outer wall of the enclosure are provided with lifting holes, and the bottom is provided with universal casters and fixed feet to facilitate overall transportation and on-site fixation. The exterior of the enclosure is provided with standardized water inlet and outlet interfaces. The overall dimensions of the equipment are 120cm long, 60cm wide, and 100cm high. It can be transported to the site by ordinary pickup truck and put into use directly without any civil engineering support. Optionally, the water inlet unit includes a water inlet pump, a water inlet filter, and a liquid level sensor; the water inlet pump is a corrosion-resistant submersible pump with a rated head of not less than 10 meters; the water inlet filter is located at the inlet of the water inlet pipe and is used to filter solid impurities in the wastewater; the liquid level sensor is installed at the water inlet pipe and is used to detect the water inlet status and send a signal to the automatic control unit to realize the protection function of automatic start-up when there is water and automatic shutdown when there is no water. Optionally, the in-situ electrolytic chlorine production unit includes an electrolytic cell, a ruthenium-iridium-titanium composite coated electrode assembly, a DC power supply module, and an automatic polarity reversal module. The electrolytic cell is made of corrosion-resistant polyvinyl chloride material, and the inside of the cell is equipped with several pairs of ruthenium-iridium-titanium composite coated electrode plates with adjustable spacing. The DC power supply module provides an adjustable DC voltage to the electrode plates. After the electrode plates are energized, they utilize the naturally occurring sodium chloride in the wastewater to electrolyze and generate hypochlorite ions. Hypochlorite ions act as a powerful oxidant to synergistically oxidize and degrade organic pollutants and pathogenic microorganisms in the wastewater, achieving in-situ purification without the need for external chemical agents. The automatic polarity reversal module periodically switches the positive and negative polarities of the electrode plates according to the instructions of the automatic control unit. The reverse electric field and bubble disturbance effect generated by the polarity switching cause the scale deposited on the electrode surface to automatically fall off. The bottom of the electrolytic cell is equipped with a V-shaped guide channel and a scale discharge valve. The fallen scale flows with the water through the V-shaped guide channel and is collected at the scale discharge valve for periodic automatic discharge, achieving an automatic scale prevention function without manual acid washing. Optionally, the automatic control unit includes a microcontroller, a water quality sensor group, a human-machine interface panel, and a wireless data transmission module. The microcontroller automatically controls the start / stop and operating parameters of the inlet pump, DC power supply module, and automatic polarity reversal module based on real-time data from the level sensor and the water quality sensor group. The water quality sensor group includes a pH sensor, a residual chlorine sensor, and a conductivity sensor. The human-machine interface panel is located on the outer wall of the enclosure and displays the equipment's operating status, processed water volume, and alarm information. The wireless data transmission module uploads the equipment's operating data to a remote monitoring platform in real time, enabling remote monitoring and unattended operation. Optionally, the water outlet unit includes a water outlet pipe, a water outlet detection port, and a compliant discharge control valve; the water outlet detection port is used to sample and test the water quality of the outlet; the compliant discharge control valve automatically opens and closes according to the instructions of the automatic control unit to ensure that the water quality meets the standards before discharge.

[0011] Optionally, a 50-150 mg / L 5-10 wt% flocculant aqueous solution is added to the pipeline at the inlet of the in-situ electrolytic chlorine production unit and after the inlet filter screen, and then the mixture is thoroughly mixed with the fishery wastewater before entering the electrolytic cell.

[0012] Optionally, the preparation method of the flocculant is as follows: According to the mass fractions, 50-100 parts of acrylic acid-maleic acid copolymer (CAS: 29132-58-9), 7.5-10.5 parts of diethylenetriamine, and 590-690 parts of N,N-dimethylformamide are added to a reaction vessel and stirred to dissolve. Then, 0.007-0.05 parts of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (CAS: 25952-53-8) are added to activate the mixture for 20-40 minutes. The mixture is then reacted at 50-70°C for 1-3 hours. After the reaction is completed, N,N-dimethylformamide is removed by distillation to obtain the flocculant.

[0013] Reaction mechanism: The carboxyl groups in the acrylic acid-maleic acid copolymer undergo an amide condensation reaction with the amino groups of diethylenetriamine to generate an amphoteric polyelectrolyte flocculant. This flocculant can stably maintain its extended molecular chain state in high-salt fishery wastewater. Through charge neutralization, adsorption bridging, and net sweeping, it can efficiently remove organic suspended solids and colloidal pollutants from the wastewater without affecting the in-situ electrolytic chlorine production process, thus synergistically improving the wastewater purification efficiency.

[0014] Technical effects: This invention provides a skid-mounted, civil engineering-free, integrated micro-scale aquaculture wastewater treatment device. Compared with existing technologies, this invention has the following significant advantages: 1. The equipment is fully integrated into one unit, requiring no supporting civil engineering. It can be put into use immediately upon arrival with power and water supply, making deployment convenient and efficient.

[0015] 2. By relying on the synergistic effect of in-situ electrolytic chlorine production and flocculants, the high salinity of wastewater is transformed into a technological advantage, eliminating the need for large amounts of external chemical agents and making the purification process green and free of secondary pollution.

[0016] 3. The equipment has automatic start / stop, automatic electrode anti-scaling and remote monitoring functions, which simplifies the operation and maintenance process, adapts to non-continuous production scenarios and reduces reliance on manual labor. Detailed Implementation

[0017] To further illustrate the technical means and effects adopted by the present invention to achieve the intended purpose, the following detailed description is provided in conjunction with embodiments and comparative examples: The wastewater comes from a seafood primary processing workshop in a coastal fishing village near Dalian. The workshop generates about 3-5 tons of seafood primary processing wastewater per day. The main pollutants in the wastewater are: chemical oxygen demand 600-1200 mg / L and ammonia nitrogen concentration 60-80 mg / L.

[0018] 1. Chemical oxygen demand: Tested according to GB17378.4-2007, using the alkaline potassium permanganate method.

[0019] 2. Ammonia nitrogen: Tested according to GB17378.4-2007, using the hypobromite oxidation method. Example 1

[0020] A skid-mounted, civil engineering-free micro-scale integrated fishery wastewater treatment equipment, the integrated equipment comprising an integrated housing, an inlet unit, an in-situ electrolytic chlorine production treatment unit, an automatic control unit, and an outlet unit.

[0021] The integrated enclosure is a rectangular, corrosion-resistant metal enclosure. The interior is divided into two functional areas by a partition: an equipment installation area and an electrical control installation area. The four corners of the outer wall of the enclosure are equipped with lifting holes, and the bottom is equipped with casters and fixed feet for easy overall transportation and on-site fixation. The exterior of the enclosure is equipped with standardized water inlet and outlet interfaces. The overall dimensions of the equipment are 120cm long, 60cm wide, and 100cm high. It can be transported to the site by ordinary pickup truck and put into use directly without any civil engineering support. The water inlet unit includes a water inlet pump, a water inlet filter, and a liquid level sensor. The water inlet pump is a corrosion-resistant submersible pump with a rated head of not less than 10 meters. The water inlet filter is located at the inlet of the water inlet pipe and is used to filter solid impurities in the wastewater. The liquid level sensor is installed at the water inlet pipe and is used to detect the water inlet status and send a signal to the automatic control unit to realize the protection function of automatic start when there is water and automatic stop when there is no water. The in-situ electrolytic chlorine production unit includes an electrolytic cell, a ruthenium-iridium-titanium composite coated electrode assembly, a DC power supply module, and an automatic polarity reversal module. The electrolytic cell is made of corrosion-resistant polyvinyl chloride material, and the inside of the cell is equipped with several pairs of ruthenium-iridium-titanium composite coated electrode plates with adjustable spacing. The DC power supply module provides an adjustable DC voltage to the electrode plates. After the electrode plates are energized, they utilize the naturally occurring sodium chloride in the wastewater to electrolyze and generate hypochlorite ions. Hypochlorite ions act as a powerful oxidant to synergistically oxidize and degrade organic pollutants and pathogenic microorganisms in the wastewater, achieving in-situ purification without the need for external chemical agents. The automatic polarity reversal module periodically switches the positive and negative polarities of the electrode plates according to the instructions of the automatic control unit. The reverse electric field and bubble disturbance effect generated by the polarity switching cause the scale deposited on the electrode surface to automatically fall off. The bottom of the electrolytic cell is equipped with a V-shaped guide channel and a scale discharge valve. The fallen scale flows with the water through the V-shaped guide channel and is collected at the scale discharge valve for periodic automatic discharge, achieving an automatic scale prevention function without manual acid washing. The automatic control unit includes a microcontroller, a water quality sensor group, a human-machine interface panel, and a wireless data transmission module. Based on real-time data from the level sensor and the water quality sensor group, the microcontroller automatically controls the start / stop and operating parameters of the inlet pump, DC power supply module, and automatic polarity reversal module. The water quality sensor group includes a pH sensor, a residual chlorine sensor, and a conductivity sensor. The human-machine interface panel, located on the outer wall of the enclosure, displays the equipment's operating status, processed water volume, and alarm information. The wireless data transmission module uploads the equipment's operating data to a remote monitoring platform in real time, enabling remote monitoring and unattended operation. The water outlet unit includes an outlet pipe, an outlet detection port, and a compliant discharge control valve; the outlet detection port is used to sample and test the quality of the outlet water; the compliant discharge control valve automatically opens and closes according to the instructions of the automatic control unit to ensure that the outlet water quality meets the standards before it can be discharged.

[0022] The aforementioned method involves adding a 50 mg / L 5wt% flocculant aqueous solution to the pipeline at the inlet of the in-situ electrolytic chlorine production unit, after the inlet filter screen, and then mixing it thoroughly with the fishery wastewater before it enters the electrolytic cell.

[0023] The preparation method of the flocculant is as follows: 50g of acrylic acid-maleic acid copolymer (CAS: 29132-58-9), 7.5g of diethylenetriamine, and 590g of N,N-dimethylformamide were added to a reaction vessel and stirred to dissolve. 0.007g of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (CAS: 25952-53-8) was added to activate the mixture for 20 minutes, and the reaction was carried out at 50°C for 1 hour. After the reaction was completed, N,N-dimethylformamide was removed by distillation to obtain the flocculant. Example 2

[0024] A skid-mounted, civil engineering-free micro-scale integrated fishery wastewater treatment equipment, the integrated equipment comprising an integrated housing, an inlet unit, an in-situ electrolytic chlorine production treatment unit, an automatic control unit, and an outlet unit.

[0025] The integrated enclosure is a rectangular, corrosion-resistant metal enclosure. The interior is divided into two functional areas by a partition: an equipment installation area and an electrical control installation area. The four corners of the outer wall of the enclosure are equipped with lifting holes, and the bottom is equipped with casters and fixed feet for easy overall transportation and on-site fixation. The exterior of the enclosure is equipped with standardized water inlet and outlet interfaces. The overall dimensions of the equipment are 120cm long, 60cm wide, and 100cm high. It can be transported to the site by ordinary pickup truck and put into use directly without any civil engineering support. The water inlet unit includes a water inlet pump, a water inlet filter, and a liquid level sensor. The water inlet pump is a corrosion-resistant submersible pump with a rated head of not less than 10 meters. The water inlet filter is located at the inlet of the water inlet pipe and is used to filter solid impurities in the wastewater. The liquid level sensor is installed at the water inlet pipe and is used to detect the water inlet status and send a signal to the automatic control unit to realize the protection function of automatic start when there is water and automatic stop when there is no water. The in-situ electrolytic chlorine production unit includes an electrolytic cell, a ruthenium-iridium-titanium composite coated electrode assembly, a DC power supply module, and an automatic polarity reversal module. The electrolytic cell is made of corrosion-resistant polyvinyl chloride material, and the inside of the cell is equipped with several pairs of ruthenium-iridium-titanium composite coated electrode plates with adjustable spacing. The DC power supply module provides an adjustable DC voltage to the electrode plates. After the electrode plates are energized, they utilize the naturally occurring sodium chloride in the wastewater to electrolyze and generate hypochlorite ions. Hypochlorite ions act as a powerful oxidant to synergistically oxidize and degrade organic pollutants and pathogenic microorganisms in the wastewater, achieving in-situ purification without the need for external chemical agents. The automatic polarity reversal module periodically switches the positive and negative polarities of the electrode plates according to the instructions of the automatic control unit. The reverse electric field and bubble disturbance effect generated by the polarity switching cause the scale deposited on the electrode surface to automatically fall off. The bottom of the electrolytic cell is equipped with a V-shaped guide channel and a scale discharge valve. The fallen scale flows with the water through the V-shaped guide channel and is collected at the scale discharge valve for periodic automatic discharge, achieving an automatic scale prevention function without manual acid washing. The automatic control unit includes a microcontroller, a water quality sensor group, a human-machine interface panel, and a wireless data transmission module. Based on real-time data from the level sensor and the water quality sensor group, the microcontroller automatically controls the start / stop and operating parameters of the inlet pump, DC power supply module, and automatic polarity reversal module. The water quality sensor group includes a pH sensor, a residual chlorine sensor, and a conductivity sensor. The human-machine interface panel, located on the outer wall of the enclosure, displays the equipment's operating status, processed water volume, and alarm information. The wireless data transmission module uploads the equipment's operating data to a remote monitoring platform in real time, enabling remote monitoring and unattended operation. The water outlet unit includes an outlet pipe, an outlet detection port, and a compliant discharge control valve; the outlet detection port is used to sample and test the quality of the outlet water; the compliant discharge control valve automatically opens and closes according to the instructions of the automatic control unit to ensure that the outlet water quality meets the standards before it can be discharged.

[0026] The aforementioned method involves adding an 80 mg / L 6 wt% flocculant aqueous solution to the pipeline at the inlet of the in-situ electrolytic chlorine production unit, after the inlet filter screen, and then mixing it thoroughly with the fishery wastewater before it enters the electrolytic cell.

[0027] The preparation method of the flocculant is as follows: 60g of acrylic acid-maleic acid copolymer (CAS: 29132-58-9), 8.5g of diethylenetriamine, and 620g of N,N-dimethylformamide were added to a reaction vessel and stirred to dissolve. 0.02g of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (CAS: 25952-53-8) was added to activate the mixture for 25 minutes, and the reaction was carried out at 55°C for 2 hours. After the reaction was completed, N,N-dimethylformamide was removed by distillation to obtain the flocculant. Example 3

[0028] A skid-mounted, civil engineering-free micro-scale integrated fishery wastewater treatment equipment, the integrated equipment comprising an integrated housing, an inlet unit, an in-situ electrolytic chlorine production treatment unit, an automatic control unit, and an outlet unit.

[0029] The integrated enclosure is a rectangular, corrosion-resistant metal enclosure. The interior is divided into two functional areas by a partition: an equipment installation area and an electrical control installation area. The four corners of the outer wall of the enclosure are equipped with lifting holes, and the bottom is equipped with casters and fixed feet for easy overall transportation and on-site fixation. The exterior of the enclosure is equipped with standardized water inlet and outlet interfaces. The overall dimensions of the equipment are 120cm long, 60cm wide, and 100cm high. It can be transported to the site by ordinary pickup truck and put into use directly without any civil engineering support. The water inlet unit includes a water inlet pump, a water inlet filter, and a liquid level sensor. The water inlet pump is a corrosion-resistant submersible pump with a rated head of not less than 10 meters. The water inlet filter is located at the inlet of the water inlet pipe and is used to filter solid impurities in the wastewater. The liquid level sensor is installed at the water inlet pipe and is used to detect the water inlet status and send a signal to the automatic control unit to realize the protection function of automatic start when there is water and automatic stop when there is no water. The in-situ electrolytic chlorine production unit includes an electrolytic cell, a ruthenium-iridium-titanium composite coated electrode assembly, a DC power supply module, and an automatic polarity reversal module. The electrolytic cell is made of corrosion-resistant polyvinyl chloride material, and the inside of the cell is equipped with several pairs of ruthenium-iridium-titanium composite coated electrode plates with adjustable spacing. The DC power supply module provides an adjustable DC voltage to the electrode plates. After the electrode plates are energized, they utilize the naturally occurring sodium chloride in the wastewater to electrolyze and generate hypochlorite ions. Hypochlorite ions act as a powerful oxidant to synergistically oxidize and degrade organic pollutants and pathogenic microorganisms in the wastewater, achieving in-situ purification without the need for external chemical agents. The automatic polarity reversal module periodically switches the positive and negative polarities of the electrode plates according to the instructions of the automatic control unit. The reverse electric field and bubble disturbance effect generated by the polarity switching cause the scale deposited on the electrode surface to automatically fall off. The bottom of the electrolytic cell is equipped with a V-shaped guide channel and a scale discharge valve. The fallen scale flows with the water through the V-shaped guide channel and is collected at the scale discharge valve for periodic automatic discharge, achieving an automatic scale prevention function without manual acid washing. The automatic control unit includes a microcontroller, a water quality sensor group, a human-machine interface panel, and a wireless data transmission module. Based on real-time data from the level sensor and the water quality sensor group, the microcontroller automatically controls the start / stop and operating parameters of the inlet pump, DC power supply module, and automatic polarity reversal module. The water quality sensor group includes a pH sensor, a residual chlorine sensor, and a conductivity sensor. The human-machine interface panel, located on the outer wall of the enclosure, displays the equipment's operating status, processed water volume, and alarm information. The wireless data transmission module uploads the equipment's operating data to a remote monitoring platform in real time, enabling remote monitoring and unattended operation. The water outlet unit includes an outlet pipe, an outlet detection port, and a compliant discharge control valve; the outlet detection port is used to sample and test the quality of the outlet water; the compliant discharge control valve automatically opens and closes according to the instructions of the automatic control unit to ensure that the outlet water quality meets the standards before it can be discharged.

[0030] The aforementioned method involves adding an 8wt% flocculant aqueous solution of 130mg / L to the pipeline at the inlet of the in-situ electrolytic chlorine production unit, after the inlet filter screen, and then mixing it thoroughly with the fishery wastewater before it enters the electrolytic cell.

[0031] The preparation method of the flocculant is as follows: 90g of acrylic acid-maleic acid copolymer (CAS: 29132-58-9), 9.5g of diethylenetriamine, and 670g of N,N-dimethylformamide were added to a reaction vessel and stirred to dissolve. 0.04g of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (CAS: 25952-53-8) was added to activate the mixture for 35 minutes, and the reaction was carried out at 65°C for 2 hours. After the reaction was completed, N,N-dimethylformamide was removed by distillation to obtain the flocculant. Example 4

[0032] A skid-mounted, civil engineering-free micro-scale integrated fishery wastewater treatment equipment, the integrated equipment comprising an integrated housing, an inlet unit, an in-situ electrolytic chlorine production treatment unit, an automatic control unit, and an outlet unit.

[0033] The integrated enclosure is a rectangular, corrosion-resistant metal enclosure. The interior is divided into two functional areas by a partition: an equipment installation area and an electrical control installation area. The four corners of the outer wall of the enclosure are equipped with lifting holes, and the bottom is equipped with casters and fixed feet for easy overall transportation and on-site fixation. The exterior of the enclosure is equipped with standardized water inlet and outlet interfaces. The overall dimensions of the equipment are 120cm long, 60cm wide, and 100cm high. It can be transported to the site by ordinary pickup truck and put into use directly without any civil engineering support. The water inlet unit includes a water inlet pump, a water inlet filter, and a liquid level sensor. The water inlet pump is a corrosion-resistant submersible pump with a rated head of not less than 10 meters. The water inlet filter is located at the inlet of the water inlet pipe and is used to filter solid impurities in the wastewater. The liquid level sensor is installed at the water inlet pipe and is used to detect the water inlet status and send a signal to the automatic control unit to realize the protection function of automatic start when there is water and automatic stop when there is no water. The in-situ electrolytic chlorine production unit includes an electrolytic cell, a ruthenium-iridium-titanium composite coated electrode assembly, a DC power supply module, and an automatic polarity reversal module. The electrolytic cell is made of corrosion-resistant polyvinyl chloride material, and the inside of the cell is equipped with several pairs of ruthenium-iridium-titanium composite coated electrode plates with adjustable spacing. The DC power supply module provides an adjustable DC voltage to the electrode plates. After the electrode plates are energized, they utilize the naturally occurring sodium chloride in the wastewater to electrolyze and generate hypochlorite ions. Hypochlorite ions act as a powerful oxidant to synergistically oxidize and degrade organic pollutants and pathogenic microorganisms in the wastewater, achieving in-situ purification without the need for external chemical agents. The automatic polarity reversal module periodically switches the positive and negative polarities of the electrode plates according to the instructions of the automatic control unit. The reverse electric field and bubble disturbance effect generated by the polarity switching cause the scale deposited on the electrode surface to automatically fall off. The bottom of the electrolytic cell is equipped with a V-shaped guide channel and a scale discharge valve. The fallen scale flows with the water through the V-shaped guide channel and is collected at the scale discharge valve for periodic automatic discharge, achieving an automatic scale prevention function without manual acid washing. The automatic control unit includes a microcontroller, a water quality sensor group, a human-machine interface panel, and a wireless data transmission module. Based on real-time data from the level sensor and the water quality sensor group, the microcontroller automatically controls the start / stop and operating parameters of the inlet pump, DC power supply module, and automatic polarity reversal module. The water quality sensor group includes a pH sensor, a residual chlorine sensor, and a conductivity sensor. The human-machine interface panel, located on the outer wall of the enclosure, displays the equipment's operating status, processed water volume, and alarm information. The wireless data transmission module uploads the equipment's operating data to a remote monitoring platform in real time, enabling remote monitoring and unattended operation. The water outlet unit includes an outlet pipe, an outlet detection port, and a compliant discharge control valve; the outlet detection port is used to sample and test the quality of the outlet water; the compliant discharge control valve automatically opens and closes according to the instructions of the automatic control unit to ensure that the outlet water quality meets the standards before it can be discharged.

[0034] The aforementioned method involves adding a 150 mg / L 10 wt% flocculant aqueous solution to the pipeline at the inlet of the in-situ electrolytic chlorine production unit, after the inlet filter screen, and then mixing it thoroughly with the fishery wastewater before it enters the electrolytic cell.

[0035] The preparation method of the flocculant is as follows: 100g of acrylic acid-maleic acid copolymer (CAS: 29132-58-9), 10.5g of diethylenetriamine, and 690g of N,N-dimethylformamide were added to a reaction vessel and stirred to dissolve. 0.05g of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (CAS: 25952-53-8) was added to activate the mixture for 40 minutes, and the reaction was carried out at 70℃ for 3 hours. After the reaction was completed, N,N-dimethylformamide was removed by distillation to obtain the flocculant.

[0036] Comparative Example 1 A skid-mounted, civil engineering-free micro-scale integrated fishery wastewater treatment equipment, the integrated equipment comprising an integrated housing, an inlet unit, an in-situ electrolytic chlorine production treatment unit, an automatic control unit, and an outlet unit.

[0037] The integrated enclosure is a rectangular, corrosion-resistant metal enclosure. The interior is divided into two functional areas by a partition: an equipment installation area and an electrical control installation area. The four corners of the outer wall of the enclosure are equipped with lifting holes, and the bottom is equipped with casters and fixed feet for easy overall transportation and on-site fixation. The exterior of the enclosure is equipped with standardized water inlet and outlet interfaces. The overall dimensions of the equipment are 120cm long, 60cm wide, and 100cm high. It can be transported to the site by ordinary pickup truck and put into use directly without any civil engineering support. The water inlet unit includes a water inlet pump, a water inlet filter, and a liquid level sensor. The water inlet pump is a corrosion-resistant submersible pump with a rated head of not less than 10 meters. The water inlet filter is located at the inlet of the water inlet pipe and is used to filter solid impurities in the wastewater. The liquid level sensor is installed at the water inlet pipe and is used to detect the water inlet status and send a signal to the automatic control unit to realize the protection function of automatic start when there is water and automatic stop when there is no water. The in-situ electrolytic chlorine production unit includes an electrolytic cell, a ruthenium-iridium-titanium composite coated electrode assembly, a DC power supply module, and an automatic polarity reversal module. The electrolytic cell is made of corrosion-resistant polyvinyl chloride material, and the inside of the cell is equipped with several pairs of ruthenium-iridium-titanium composite coated electrode plates with adjustable spacing. The DC power supply module provides an adjustable DC voltage to the electrode plates. After the electrode plates are energized, they utilize the naturally occurring sodium chloride in the wastewater to electrolyze and generate hypochlorite ions. Hypochlorite ions act as a powerful oxidant to synergistically oxidize and degrade organic pollutants and pathogenic microorganisms in the wastewater, achieving in-situ purification without the need for external chemical agents. The automatic polarity reversal module periodically switches the positive and negative polarities of the electrode plates according to the instructions of the automatic control unit. The reverse electric field and bubble disturbance effect generated by the polarity switching cause the scale deposited on the electrode surface to automatically fall off. The bottom of the electrolytic cell is equipped with a V-shaped guide channel and a scale discharge valve. The fallen scale flows with the water through the V-shaped guide channel and is collected at the scale discharge valve for periodic automatic discharge, achieving an automatic scale prevention function without manual acid washing. The automatic control unit includes a microcontroller, a water quality sensor group, a human-machine interface panel, and a wireless data transmission module. Based on real-time data from the level sensor and the water quality sensor group, the microcontroller automatically controls the start / stop and operating parameters of the inlet pump, DC power supply module, and automatic polarity reversal module. The water quality sensor group includes a pH sensor, a residual chlorine sensor, and a conductivity sensor. The human-machine interface panel, located on the outer wall of the enclosure, displays the equipment's operating status, processed water volume, and alarm information. The wireless data transmission module uploads the equipment's operating data to a remote monitoring platform in real time, enabling remote monitoring and unattended operation. The water outlet unit includes an outlet pipe, an outlet detection port, and a compliant discharge control valve; the outlet detection port is used to sample and test the quality of the outlet water; the compliant discharge control valve automatically opens and closes according to the instructions of the automatic control unit to ensure that the outlet water quality meets the standards before it can be discharged.

[0038] Comparative Example 2 A skid-mounted, civil engineering-free micro-scale integrated fishery wastewater treatment equipment, the integrated equipment comprising an integrated housing, an inlet unit, an in-situ electrolytic chlorine production treatment unit, an automatic control unit, and an outlet unit.

[0039] The integrated enclosure is a rectangular, corrosion-resistant metal enclosure. The interior is divided into two functional areas by a partition: an equipment installation area and an electrical control installation area. The four corners of the outer wall of the enclosure are equipped with lifting holes, and the bottom is equipped with casters and fixed feet for easy overall transportation and on-site fixation. The exterior of the enclosure is equipped with standardized water inlet and outlet interfaces. The overall dimensions of the equipment are 120cm long, 60cm wide, and 100cm high. It can be transported to the site by ordinary pickup truck and put into use directly without any civil engineering support. The water inlet unit includes a water inlet pump, a water inlet filter, and a liquid level sensor. The water inlet pump is a corrosion-resistant submersible pump with a rated head of not less than 10 meters. The water inlet filter is located at the inlet of the water inlet pipe and is used to filter solid impurities in the wastewater. The liquid level sensor is installed at the water inlet pipe and is used to detect the water inlet status and send a signal to the automatic control unit to realize the protection function of automatic start when there is water and automatic stop when there is no water. The in-situ electrolytic chlorine production unit includes an electrolytic cell, a ruthenium-iridium-titanium composite coated electrode assembly, a DC power supply module, and an automatic polarity reversal module. The electrolytic cell is made of corrosion-resistant polyvinyl chloride material, and the inside of the cell is equipped with several pairs of ruthenium-iridium-titanium composite coated electrode plates with adjustable spacing. The DC power supply module provides an adjustable DC voltage to the electrode plates. After the electrode plates are energized, they utilize the naturally occurring sodium chloride in the wastewater to electrolyze and generate hypochlorite ions. Hypochlorite ions act as a powerful oxidant to synergistically oxidize and degrade organic pollutants and pathogenic microorganisms in the wastewater, achieving in-situ purification without the need for external chemical agents. The automatic polarity reversal module periodically switches the positive and negative polarities of the electrode plates according to the instructions of the automatic control unit. The reverse electric field and bubble disturbance effect generated by the polarity switching cause the scale deposited on the electrode surface to automatically fall off. The bottom of the electrolytic cell is equipped with a V-shaped guide channel and a scale discharge valve. The fallen scale flows with the water through the V-shaped guide channel and is collected at the scale discharge valve for periodic automatic discharge, achieving an automatic scale prevention function without manual acid washing. The automatic control unit includes a microcontroller, a water quality sensor group, a human-machine interface panel, and a wireless data transmission module. Based on real-time data from the level sensor and the water quality sensor group, the microcontroller automatically controls the start / stop and operating parameters of the inlet pump, DC power supply module, and automatic polarity reversal module. The water quality sensor group includes a pH sensor, a residual chlorine sensor, and a conductivity sensor. The human-machine interface panel, located on the outer wall of the enclosure, displays the equipment's operating status, processed water volume, and alarm information. The wireless data transmission module uploads the equipment's operating data to a remote monitoring platform in real time, enabling remote monitoring and unattended operation. The water outlet unit includes an outlet pipe, an outlet detection port, and a compliant discharge control valve; the outlet detection port is used to sample and test the quality of the outlet water; the compliant discharge control valve automatically opens and closes according to the instructions of the automatic control unit to ensure that the outlet water quality meets the standards before it can be discharged.

[0040] The aforementioned method involves adding a 50 mg / L 5wt% flocculant aqueous solution to the pipeline at the inlet of the in-situ electrolytic chlorine production unit, after the inlet filter screen, and then mixing it thoroughly with the fishery wastewater before it enters the electrolytic cell.

[0041] The preparation method of the flocculant is as follows: 7.5g of diethylenetriamine and 590g of N,N-dimethylformamide were added to a reaction vessel and stirred to dissolve. 0.007g of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (CAS: 25952-53-8) was added to activate the mixture for 20 minutes, and the reaction was carried out at 50℃ for 1 hour. After the reaction was completed, N,N-dimethylformamide was removed by distillation to obtain the flocculant.

[0042] Comparative Example 3 A skid-mounted, civil engineering-free micro-scale integrated fishery wastewater treatment equipment, the integrated equipment comprising an integrated housing, an inlet unit, an in-situ electrolytic chlorine production treatment unit, an automatic control unit, and an outlet unit.

[0043] The integrated enclosure is a rectangular, corrosion-resistant metal enclosure. The interior is divided into two functional areas by a partition: an equipment installation area and an electrical control installation area. The four corners of the outer wall of the enclosure are equipped with lifting holes, and the bottom is equipped with casters and fixed feet for easy overall transportation and on-site fixation. The exterior of the enclosure is equipped with standardized water inlet and outlet interfaces. The overall dimensions of the equipment are 120cm long, 60cm wide, and 100cm high. It can be transported to the site by ordinary pickup truck and put into use directly without any civil engineering support. The water inlet unit includes a water inlet pump, a water inlet filter, and a liquid level sensor. The water inlet pump is a corrosion-resistant submersible pump with a rated head of not less than 10 meters. The water inlet filter is located at the inlet of the water inlet pipe and is used to filter solid impurities in the wastewater. The liquid level sensor is installed at the water inlet pipe and is used to detect the water inlet status and send a signal to the automatic control unit to realize the protection function of automatic start when there is water and automatic stop when there is no water. The in-situ electrolytic chlorine production unit includes an electrolytic cell, a ruthenium-iridium-titanium composite coated electrode assembly, a DC power supply module, and an automatic polarity reversal module. The electrolytic cell is made of corrosion-resistant polyvinyl chloride material, and the inside of the cell is equipped with several pairs of ruthenium-iridium-titanium composite coated electrode plates with adjustable spacing. The DC power supply module provides an adjustable DC voltage to the electrode plates. After the electrode plates are energized, they utilize the naturally occurring sodium chloride in the wastewater to electrolyze and generate hypochlorite ions. Hypochlorite ions act as a powerful oxidant to synergistically oxidize and degrade organic pollutants and pathogenic microorganisms in the wastewater, achieving in-situ purification without the need for external chemical agents. The automatic polarity reversal module periodically switches the positive and negative polarities of the electrode plates according to the instructions of the automatic control unit. The reverse electric field and bubble disturbance effect generated by the polarity switching cause the scale deposited on the electrode surface to automatically fall off. The bottom of the electrolytic cell is equipped with a V-shaped guide channel and a scale discharge valve. The fallen scale flows with the water through the V-shaped guide channel and is collected at the scale discharge valve for periodic automatic discharge, achieving an automatic scale prevention function without manual acid washing. The automatic control unit includes a microcontroller, a water quality sensor group, a human-machine interface panel, and a wireless data transmission module. Based on real-time data from the level sensor and the water quality sensor group, the microcontroller automatically controls the start / stop and operating parameters of the inlet pump, DC power supply module, and automatic polarity reversal module. The water quality sensor group includes a pH sensor, a residual chlorine sensor, and a conductivity sensor. The human-machine interface panel, located on the outer wall of the enclosure, displays the equipment's operating status, processed water volume, and alarm information. The wireless data transmission module uploads the equipment's operating data to a remote monitoring platform in real time, enabling remote monitoring and unattended operation. The water outlet unit includes an outlet pipe, an outlet detection port, and a compliant discharge control valve; the outlet detection port is used to sample and test the quality of the outlet water; the compliant discharge control valve automatically opens and closes according to the instructions of the automatic control unit to ensure that the outlet water quality meets the standards before it can be discharged.

[0044] The aforementioned method involves adding a 50 mg / L 5wt% flocculant aqueous solution to the pipeline at the inlet of the in-situ electrolytic chlorine production unit, after the inlet filter screen, and then mixing it thoroughly with the fishery wastewater before it enters the electrolytic cell.

[0045] The preparation method of the flocculant is as follows: 50g of acrylic acid-maleic acid copolymer (CAS: 29132-58-9) and 590g of N,N-dimethylformamide were added to a reaction vessel and stirred to dissolve. 0.007g of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (CAS: 25952-53-8) was added to activate the mixture for 20 minutes, and the reaction was carried out at 50℃ for 1 hour. After the reaction was completed, N,N-dimethylformamide was removed by distillation to obtain the flocculant.

[0046] Table 1. Detection results of effluent COD concentration and effluent ammonia nitrogen concentration in the specific implementation plan. Effluent COD concentration (mg / L) Ammonia nitrogen concentration in effluent (mg / L) Example 1 145 14 Example 2 129 12 Example 3 113 9 Example 4 102 7 Comparative Example 1 300 46 Comparative Example 2 191 22 Comparative Example 3 175 20 Table 1 Summary of effluent COD and ammonia nitrogen concentration test results Comparing the effluent quality indicators of the examples and comparative examples, it can be seen that the addition of this amphoteric polyelectrolyte flocculant significantly improves the removal efficiency of COD and ammonia nitrogen from fishery wastewater. This flocculant, through its amphoteric structure formed by amide condensation, maintains stable flocculation performance in high-salt environments. It can rapidly adsorb and neutralize pollutant charges, bridge and coagulate colloidal impurities, reducing the load on subsequent chlorine production and purification via electrolysis. It also forms a synergistic effect with the in-situ electrolysis process, ultimately achieving effluent quality that meets standards and is superior to traditional treatment methods. This fully demonstrates the core role of flocculants in enhancing pretreatment and improving overall purification efficiency in the treatment of high-salt fishery wastewater.

[0047] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A skid-mounted, civil engineering-free integrated micro-scale aquaculture wastewater treatment equipment, the integrated equipment comprising an integrated housing, an inlet unit, an in-situ electrolytic chlorine production treatment unit, an automatic control unit, and an outlet unit; A 50-150 mg / L 5-10 wt% flocculant aqueous solution is added to the pipeline at the water inlet front end and after the water inlet filter screen of the in-situ electrolytic chlorine production treatment unit. After being fully mixed with the fishery wastewater, the solution enters the electrolytic cell. The flocculant is prepared by reacting acrylic acid-maleic acid copolymer, diethylenetriamine, and 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride.

2. The skid-mounted, civil engineering-free, integrated micro-scale fishery wastewater treatment equipment according to claim 1, characterized in that: The integrated enclosure is a rectangular, corrosion-resistant metal box structure. The interior of the enclosure is divided into two functional areas by a partition: an equipment installation area and an electrical control installation area. The four corners of the outer wall of the enclosure are equipped with hoisting holes, and the bottom is equipped with omnidirectional casters and fixed feet. The exterior of the enclosure is equipped with standardized water inlet and outlet interfaces. The overall dimensions of the equipment are 120cm long, 60cm wide, and 100cm high. It can be transported to the site by a regular pickup truck and put into use directly without any civil engineering support.

3. The skid-mounted, civil engineering-free, integrated micro-scale fishery wastewater treatment equipment according to claim 1, characterized in that: The water inlet unit includes a water inlet pump, a water inlet filter, and a liquid level sensor. The water inlet pump is a corrosion-resistant submersible pump with a rated head of not less than 10 meters. The water inlet filter is located at the inlet of the water inlet pipe and is used to filter solid impurities in the wastewater. The liquid level sensor is installed at the water inlet pipe and is used to detect the water inlet status and send a signal to the automatic control unit to realize the protection function of automatic start-up when there is water and automatic shutdown when there is no water.

4. The skid-mounted, civil engineering-free, integrated micro-scale fishery wastewater treatment equipment according to claim 1, characterized in that: The in-situ electrolytic chlorine production unit includes an electrolytic cell, a ruthenium-iridium-titanium composite coated electrode assembly, a DC power supply module, and an automatic electrode reversal module. The electrolytic cell is made of corrosion-resistant polyvinyl chloride material, and the inside of the cell is equipped with several pairs of ruthenium-iridium-titanium composite coated electrode plates with adjustable spacing. The DC power supply module provides an adjustable DC voltage to the electrode plates. After the electrode plates are energized, they utilize the naturally occurring sodium chloride in the wastewater to electrolyze and generate hypochlorite ions. Hypochlorite ions act as a powerful oxidant to synergistically oxidize and degrade organic pollutants and pathogenic microorganisms in the wastewater, achieving in-situ purification without the need for external chemical agents. The automatic polarity reversal module periodically switches the positive and negative polarities of the electrode plates according to the instructions of the automatic control unit. The reverse electric field and bubble disturbance effect generated by the polarity switching cause the scale deposited on the electrode surface to fall off automatically. The bottom of the electrolytic cell is equipped with a V-shaped guide channel and a scale discharge valve. The fallen scale flows with the water through the V-shaped guide channel and is collected at the scale discharge valve for periodic automatic discharge, realizing the automatic scale prevention function without manual acid washing.

5. The skid-mounted, civil engineering-free, integrated micro-scale fishery wastewater treatment equipment according to claim 1, characterized in that: The automatic control unit includes a microcontroller, a water quality sensor group, a human-machine interface panel, and a wireless data transmission module. Based on real-time data from the level sensor and the water quality sensor group, the microcontroller automatically controls the start / stop and operating parameters of the inlet pump, DC power supply module, and automatic polarity reversal module. The water quality sensor group includes a pH sensor, a residual chlorine sensor, and a conductivity sensor. The human-machine interface panel, located on the outer wall of the enclosure, displays the equipment's operating status, processed water volume, and alarm information. The wireless data transmission module uploads the equipment's operating data to a remote monitoring platform in real time, enabling remote monitoring and unattended operation.

6. The skid-mounted, civil engineering-free, integrated micro-scale fishery wastewater treatment equipment according to claim 1, characterized in that: The water outlet unit includes an outlet pipe, an outlet detection port, and a compliant discharge control valve; the outlet detection port is used to sample and test the quality of the outlet water; the compliant discharge control valve automatically opens and closes according to the instructions of the automatic control unit to ensure that the outlet water quality meets the standards before it can be discharged.

7. The skid-mounted, civil engineering-free, integrated micro-scale fishery wastewater treatment equipment according to claim 1, characterized in that: The preparation method of the flocculant is as follows: According to the mass fractions, 50-100 parts of acrylic acid-maleic acid copolymer, 7.5-10.5 parts of diethylenetriamine, and 590-690 parts of N,N-dimethylformamide are added to a reaction vessel and stirred to dissolve. Then, 0.007-0.05 parts of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride are added to activate the mixture for 20-40 minutes. The mixture is then reacted at 50-70°C for 1-3 hours. After the reaction is completed, N,N-dimethylformamide is removed by distillation to obtain the flocculant.