Treatment system for mariculture tail water

Abstract

The utility model aims to disclose a treatment system for mariculture tail water. The treatment system comprises a tail water collecting tank, a biological filter tank, a coagulative precipitation tank, a sludge concentration tank and an ecological pond, compared with the prior art, suspended solids, colloids and other substances in water are removed through the microfilter and the protein separator, BOD5, CODcr, nitrogen, phosphorus and other substances in water are degraded through the biological filter, wastewater is purified and converted into harmless substances through the absorption and degradation effects of microorganisms on pollutants, activated sludge and supernate are separated through the coagulative precipitation tank, and the wastewater is recycled. Activated sludge is further concentrated through the sludge concentration tank, the sludge volume is compressed, unicellular algae in the water body are fully utilized through the ecological pond, pollutants such as nitrogen and phosphorus in the water body can be further effectively reduced, the effluent quality can be stable and reach the first-grade sea discharge standard, and the water quality is improved. And the problem that the treatment effect is not ideal and unstable due to improper manual operation factors can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of seawater treatment systems, in particular to a kind of seawater aquaculture tail water treatment system. BACKGROUND

[0002] With the continuous development of China's seawater aquaculture industry scale in recent years, the pollution generated in the process of aquaculture is also increasing, the pollution in aquaculture mainly comes from the feed, excrement of breeding organisms and antibiotics and disinfectants used in the process of aquaculture for disease prevention and growth promotion, etc. If not treated directly discharged, it will cause cumulative and continuous pollution to the environment, especially for factory circulating water aquaculture, its breeding density is large, water treatment capacity is large, pollutant concentration is high, the traditional treatment process cannot meet the requirements with the gradual strictness of national discharge standard, further optimization of treatment system is needed to reduce system floor area, reduce system treatment cost, improve treatment effect, increase system treatment stability.

[0003] Therefore, there is a particular need for a seawater aquaculture tail water treatment system to solve the above existing problems. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of seawater aquaculture tail water treatment system, for the deficiency of prior art, not only can make that effluent water quality is stable to reach the first level of sea discharge standard, but also can reduce the problem of unstable treatment effect caused by improper human operation.

[0005] The technical problem solved by the utility model can be realized by the following technical solutions:

[0006] A kind of seawater aquaculture tail water treatment system, including tail water collecting pool, biological filter, coagulation sedimentation tank, sludge thickening tank and ecological pond;Seawater aquaculture tail water flows into tail water collecting pool, enters biological filter and coagulation sedimentation tank in turn after microfilter and protein separator, the supernatant of coagulation sedimentation tank enters ecological pond, the sludge produced by coagulation sedimentation tank enters sludge thickening tank, the sludge of sludge thickening tank is pumped out and sent for processing, the supernatant of sludge thickening tank enters tail water collecting pool for reprocessing, the effluent water quality after ecological pond treatment is stable and up to standard.

[0007] In an embodiment of the utility model, the upper end of the tail water collecting pool is provided with a grid machine for filtering, and a tail water lifting pump is arranged in the tail water collecting pool for pumping the seawater aquaculture tail water into the microfilter.

[0008] In an embodiment of the utility model, the biological filter is connected with the air blower that is continuously aerated, the agitator that is continuously mixes and stirs sewage is arranged in the biological filter, the internal circulation pump that continuously sends nitrification liquid to the front end of biological filter is connected to the biological filter.

[0009] In an embodiment of the utility model, the coagulation sedimentation tank is connected with PAM dosing device and PAC dosing device, the sludge pump that punches the sludge that deposits into the sludge hopper into sludge thickening tank is arranged in the coagulation sedimentation tank.

[0010] In an embodiment of the utility model, the sludge thickening tank is connected with the sludge external delivery pump that externally delivers and processes the sludge after pumping out.

[0011] In an embodiment of the utility model, the ecological pond is provided with the surface exposure machine that is continuously oxygenated.

[0012] The seawater breeding tail water treatment system of the utility model has the following advantages:

[0013] First, the number of operators is greatly reduced, and the treatment quality and efficiency are improved.

[0014] Second, the treated water is stable and can reach the first-level sea discharge standard.

[0015] Third, the biochemical and ecological combination treatment method can ensure the treatment effect and save land and operation cost.

[0016] Fourth, the special designed nitrification, denitrification and adjustable filter process is used to remove TN.

[0017] Compared with the prior art, the seawater breeding tail water treatment system of the utility model removes suspended solids and colloids and other substances in water through the microfilter and protein separator, degrades BOD5, CODcr and nitrogen and phosphorus and other substances in water through the biological filter, purifies and converts wastewater into harmless substances through the absorption and degradation of microorganisms, separates activated sludge and supernatant through the coagulation sedimentation tank, further concentrates activated sludge through the sludge thickening tank, compresses the sludge volume, and fully utilizes the single-celled algae in the water body through the ecological pond to further effectively reduce nitrogen and phosphorus and other pollutants in the water body. Not only can the water quality be stable and reach the first-level sea discharge standard, but also the problem of unstable treatment effect caused by improper human operation can be reduced, and the purpose of the utility model is achieved.

[0018] The characteristics of the utility model can be clearly understood by referring to the drawings and the detailed description of the preferred embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1The utility model discloses a seawater breeding tail water treatment system structure diagram. DETAILED DESCRIPTION

[0020] In order to make the technical means, creation features, achieve purposes and effects of the utility model easy to understand, the utility model is further described below in combination with specific drawings.

[0021] EMBODIMENT

[0022] As Figure 1 The utility model discloses a seawater breeding tail water treatment system, including tail water collecting pool 1, biological filter 7, coagulation sedimentation tank 10, sludge concentration tank 14 and ecological pond 12;Seawater breeding tail water flows into tail water collecting pool 1, and after passing through microfiltration machine 4 and protein separator 6, enters biological filter 7 and coagulation sedimentation tank 10 in proper order, and the supernatant of coagulation sedimentation tank 10 enters ecological pond 12, and the sludge produced by coagulation sedimentation tank 10 enters sludge concentration tank 14, and the sludge of sludge concentration tank 14 is pumped out and sent for processing, and the supernatant of sludge concentration tank 14 enters tail water collecting pool 1 and is treated again, and the water quality of the effluent treated by ecological pond 12 is stable and up to standard.

[0023] Tail water collecting pool 1, the tail water produced after production flows into tail water collecting pool 1 and is temporarily stored, and the tail water collecting pool 1 is equipped with grating machine 2 and tail water lifting pump 3, the tail water enters tail water collecting pool 1, first passes through grating machine 2 to remove larger suspended solids and floating objects, so as to reduce the processing load of subsequent water treatment process, and then passes through tail water lifting pump 3 and is lifted into microfiltration machine 4.

[0024] Microfiltration machine 4, the water lifted by tail water lifting pump 3 enters microfiltration machine 4, microfiltration machine 4 uses filter screen as medium, directly filters and removes the small solid in water through mechanical physical filtration mode, and quickly, massively and effectively filters the suspended solids, feces and organic particles in water.

[0025] Protein separator 6, the sewage treated by microfiltration machine 4 is further lifted into protein separator 6, and protein separator 6 can further remove the suspended particles and colloidal substances with smaller particle size in water body and separate macromolecular organic matters such as protein.

[0026] Biological filter 7, the nitrogen and phosphorus substances in the pretreated sewage still cannot meet the water quality requirements of effluent, and need to be further degraded through nitrification and denitrification reaction by biochemical method, and the biological filter 7 is composed of adjusting filter, denitrification tank and nitrification tank, wherein the denitrification tank is equipped with agitator, which plays the role of mixing water quality, and the adjusting filter, denitrification tank and nitrification tank are provided with aeration system at the bottom and filled with biological filler, and the air blower between the equipment supplies air for the aeration system, and the nitrification liquid in the nitrification tank is lifted into the adjusting filter by the inner reflux pump.

[0027] Coagulation sedimentation tank 10, sewage enters coagulation sedimentation tank 10, first by pipeline adds coagulant and coagulant aid to make the sludge in sewage form colloid, then after coagulation sedimentation tank 10, mud and water are separated, sludge enters sludge concentration tank 14, supernatant enters ecological pond 12.

[0028] Sludge concentration tank 14, sludge is concentrated after sludge concentration tank 14, and is pumped out by sludge delivery pump 15 and is treated outside, and the supernatant returns to tail water collecting tank 1 and reenters the system treatment.

[0029] Ecological pond 12, ecological pond is bred with algae, plankton, benthic animals, fish and shrimp and other organisms, and can form multiple food chains, further degrade harmful substances such as nitrogen and phosphorus in water, and ultimately make the effluent water quality stable and up to standard.

[0030] The working principle of the seawater aquaculture tail water treatment system of the utility model is as follows:

[0031] Production tail water first flows into tail water collecting tank 1, is filtered by grating machine 2, is punched into microfilter 4 by tail water lifting pump 3, and after being filtered by microfilter 4, the sewage is lifted by lifting pump 5 into protein separator 6 to further remove suspended particulate matter, and after the sewage passes through protein separator 6, it enters biological filter tank 7;

[0032] After the sewage enters biological filter tank 7, the nitrifying and denitrifying bacteria in biological filter tank 7 degrade organic matter, ammonia nitrogen and the like in the sewage, the biological filter tank is continuously aerated by air blower 17, the sewage in the biological filter tank is continuously mixed and stirred by stirring machine 8, and the nitrification liquid is continuously transported to the front end of biological filter tank 7 by internal circulation pump 9 to meet the survival conditions of the nitrifying and denitrifying bacteria in the biological filter tank, so that the nitrifying and denitrifying bacteria continuously metabolize and reproduce to degrade harmful substances in the sewage, and after the sewage in the biological filter tank reacts, it enters coagulation sedimentation tank 10;

[0033] Before the sewage enters coagulation sedimentation tank 10, 18 PAC flocculant and 19 PAM coagulant aid are added by PAM dosing device 19 and PAC dosing device 18 in sequence, so that the sludge in the sewage forms colloid, and then enters coagulation sedimentation tank 10 for sedimentation, the sludge in the sludge hopper is punched into sludge concentration tank 14 by sludge pump 11 for further concentration, and the supernatant gravitates into ecological pond 12;

[0034] After the sludge enters sludge concentration tank 14, the concentration of the sludge is increased by further concentration and gathered in the sludge hopper, and after being pumped out by sludge delivery pump 15, the sludge is delivered for treatment outside, and the supernatant returns to tail water collecting tank 1 and reenters the system treatment;

[0035] After the sewage enters the ecological pond 12, the algae in the ecological pond 12 further degrade the harmful substances such as nitrogen and phosphorus in the water, and finally make the sewage effluent water quality stable and up to standard, in order to prevent the ecological pond from being anoxic, the surface exposure machine 13 is arranged to continuously oxygenate the ecological pond.

[0036] 1000m 3 / d sea water aquaculture tail water treatment system.

[0037] The seawater quality index for case production is shown in Table 1

[0038] The tail water discharge water quality parameters are as follows:

[0039] Table 1

[0040]

[0041] Treatment effluent water quality

[0042] After the design sewage is treated, the effluent water quality reaches the first discharge standard in the Sea Water Aquaculture Water Discharge Requirement SCT9103-2007, and the specific parameters are as follows:

[0043] Table 2

[0044]

[0045] The basic principle and main features of the utility model and the advantages of the utility model are shown and described. It should be understood by the skilled in the art that the utility model is not limited by the above examples, and the above examples and the description in the specification are only to illustrate the principle of the utility model, and various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed, and the scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A system for treating marine aquaculture effluent, the system comprising: The tail water collecting pool, the biological filter, the coagulation sedimentation tank, the sludge concentration tank and the ecological pond are included; the seawater breeding tail water flows into the tail water collecting pool, and then sequentially enters the biological filter and the coagulation sedimentation tank after passing through the micro filter and the protein separator; the supernatant of the coagulation sedimentation tank enters the ecological pond; the sludge of the coagulation sedimentation tank enters the sludge concentration tank; the sludge of the sludge concentration tank is pumped out for treatment; the supernatant of the sludge concentration tank enters the tail water collecting pool for reprocessing; and the water quality of the effluent of the ecological pond is stable and up to the standard.

2. A system for treatment of marine aquaculture effluent according to claim 1, wherein A grid machine for filtering is arranged at the upper end of the tail water collecting pool, and a tail water lifting pump for pumping the seawater breeding tail water into the micro filter is arranged in the tail water collecting pool.

3. The system for treatment of marine aquaculture effluent of claim 1, wherein, A blower for continuously aerating and oxygenating is connected to the biological filter, a stirrer for continuously mixing and stirring the sewage is arranged in the biological filter, and an internal circulation pump for continuously conveying the nitrification liquid to the front end of the biological filter is connected to the biological filter.

4. The system for treatment of marine aquaculture effluent of claim 1, wherein, A PAM dosing device and a PAC dosing device are connected to the coagulation sedimentation tank, and a sludge pump for pumping the sludge deposited in the sludge hopper into the sludge concentration tank is arranged in the coagulation sedimentation tank.

5. The system for treatment of marine aquaculture effluent of claim 1, wherein, A sludge delivery pump for pumping out the sludge for treatment is connected to the sludge concentration tank.

6. The system for treatment of marine aquaculture effluent of claim 1, wherein, A surface exposure machine for continuously oxygenating is arranged in the ecological pond.

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