A comprehensive treatment system for eel farming tail water

Abstract

The utility model proposes a comprehensive treatment system for eel aquaculture tail water, which relates to the technical field and solves the problem that the existing aquaculture tail water is generally directly discharged or simply treated, which does not meet the requirements of environmental protection. The utility model includes a sludge filter box, an air flotation machine, an MBR membrane group, a disinfection box, and an NF sodium filter membrane group, which are connected in sequence through a water pipe and a water pump. The water inlet end of the sludge filter box is connected to the aquaculture tail water, the water outlet end of the sludge filter box is connected to the water inlet end of the air flotation machine, the water inlet end of the air flotation machine is also connected to the drug outlet of the first dosing device, the water outlet end of the air flotation machine is connected to the water inlet end of the MBR membrane group, and the water outlet end of the MBR membrane group is connected to the water inlet end of the disinfection box. The beneficial effects of the utility model are: multi-stage filtration treatment of tail water, high water treatment efficiency and good effect, disinfection through the disinfection box, tail water can be recycled, and water resources are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of eel breeding, in particular to a comprehensive treatment system for eel breeding tail water. Background Art

[0002] With the rapid development of aquaculture, the existing eel farming tail water contains a large amount of particulate dirt. The substances contained in the wastewater have aggravated the eutrophication of the water body and water pollution, destroyed the ecological environment balance, and at the same time, water pollution has restricted the development of aquaculture. The existing aquaculture tail water is generally discharged directly or simply treated, which does not meet the requirements of environmental protection. Utility Model Content

[0003] The utility model aims to solve the problem that the existing aquaculture tail water is generally directly discharged or simply treated, which does not meet the requirements of environmental protection.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] An eel breeding tailwater comprehensive treatment system, characterized in that it comprises a sludge filter box, an air flotation machine, an MBR membrane group, a disinfection box, and a NF sodium filter membrane group which are sequentially connected through a water pipe and a water pump;

[0006] The water inlet of the sludge filter box is connected to the aquaculture tail water, and a coarse filter screen and a fine filter screen are arranged in the sludge filter box for filtering the impurities and sludge in the tail water, and the water outlet of the sludge filter box is connected to the water inlet of the air flotation machine;

[0007] The water inlet of the air flotation machine is also connected to the drug outlet of the first drug adding device, and the water outlet of the air flotation machine is connected to the water inlet of the MBR membrane group;

[0008] The water outlet end of the MBR membrane group is connected to the water inlet end of the disinfection box, the disinfection box includes a heater for heating the water in the disinfection box, the water inlet end of the disinfection box is also connected to a second dosing device, a stirring motor is provided at the upper end of the disinfection box, the output end of the stirring motor extends downward into the disinfection box and is connected to a stirrer, and the water outlet end of the disinfection box is connected to the water inlet end of the NF sodium filter membrane group.

[0009] A further improvement is that the coarse filter screen and the fine filter screen are both inverted V-shaped stainless steel filter screens, and a coarse sludge outlet and a fine sludge outlet are respectively provided on one side wall of the sludge filter box corresponding to the coarse filter screen and the fine filter screen; and a sludge discharge valve is provided on the coarse sludge outlet and the fine sludge outlet.

[0010] A further improvement is that the MBR membrane group includes a biochemical reaction tank, an MBR membrane assembly immersed in the biochemical reaction tank, the MBR membrane assembly is connected to an MBR outlet pipe and a flushing air pipe through a PE plastic pipe, and the MBR outlet pipe is connected to the water inlet end of the disinfection box through a water pump.

[0011] A further improvement is that: the biochemical reaction pool contains an aerobic pool mixed liquid.

[0012] A further improvement is that the NF sodium filter membrane group includes three parallel sodium filter membrane units, the water outlet end of the sodium filter membrane unit is provided with a three-way valve and a concentration monitor, the water outlet end of the sodium filter membrane unit is divided into a clean water outlet and a backflow port, the clean water outlet is provided with a flow meter, the backflow port is provided with a regulating valve, and the backflow port is connected to the water inlet end of the MBR membrane group.

[0013] A further improvement is that a pressure monitor is provided on the water inlet end of the NF sodium filter membrane group.

[0014] A further improvement is that the pore size of the microfiltration membrane or ultrafiltration membrane used in the MBR membrane group is 0.1-0.4 microns.

[0015] A further improvement is that the pore size of the nanofiltration membrane used in the NF sodium filtration membrane group is 0.5-5 nanometers.

[0016] A further improvement is that a water valve is provided on the water conduit.

[0017] Compared with the existing technology, the above technical solution has the following beneficial effects:

[0018] The tail water produced by eel farming is filtered at multiple levels through sludge filter boxes, air flotation machines, MBR membrane groups, and NF sodium filter groups, and the impurities and sludge in the tail water are fully filtered, with high water treatment efficiency and good effect. The disinfection is carried out in a disinfection box, and the effect and efficiency of disinfection are improved through stirring and heating. A concentration monitor is set at the outlet of the NF sodium filter group to monitor the discharged water, and the water that does not meet the requirements is re-processed and filtered until it can be discharged for reuse, ensuring the treatment effect; the tail water is comprehensively treated and can be recycled to save water resources;

[0019] The sludge filter box is equipped with coarse and fine stainless steel filter screens, which can filter out large particles of impurity sludge and discharge them through the sludge outlet for recycling. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 It is a structural schematic diagram of the utility model;

[0022] Figure 2 It is a structural schematic diagram of the sludge filter box 1 in the utility model;

[0023] Figure 3 It is a structural schematic diagram of the MBR membrane group 3 in the utility model;

[0024] Figure 4 It is a structural schematic diagram of the disinfection box 4 in the utility model;

[0025] Figure 5 It is a structural schematic diagram of the NF sodium filter membrane group 5 in the utility model.

[0026] Explanation of the accompanying drawings: sludge filter box 1, flotation machine 2, MBR membrane group 3, disinfection box 4, NF sodium filter membrane group 5, water pump 6, coarse filter 11, fine filter 12, coarse sludge outlet 13, fine sludge outlet 14, sludge discharge valve 15, flotation machine 21, first dosing device 21, biochemical reaction tank 31, PE plastic pipe 32, MBR outlet pipe 33, flushing air pipe 34, MBR membrane assembly 35, heater 41, second dosing device 42, stirring motor 43, stirrer 44, sodium filter membrane unit 51, flow meter 52, three-way valve 53, regulating valve 54, concentration monitor 55, pressure monitor 56. DETAILED DESCRIPTION

[0027] See also Figure 1-Figure 5 As shown, the technical solution adopted in this specific implementation is:

[0028] An eel breeding tailwater comprehensive treatment system comprises a sludge filter box 1, an air flotation machine 2, an MBR membrane group 3, a disinfection box 4, and a NF sodium filter membrane group 5 which are sequentially connected through a water pipe and a water pump 6;

[0029] The water inlet of the sludge filter box 1 is connected to the aquaculture tail water, and a coarse filter screen 11 and a fine filter screen 12 are provided in the sludge filter box 1 for filtering the impurities and sludge in the tail water. The water outlet of the sludge filter box 1 is connected to the water inlet of the air flotation machine 2;

[0030] The water inlet of the air flotation machine 2 is also connected to the drug outlet of the first drug adding device 21, and the water outlet of the air flotation machine 2 is connected to the water inlet of the MBR membrane group 3;

[0031] The water outlet end of the MBR membrane group 3 is connected to the water inlet end of the disinfection box 4, and the disinfection box 4 includes a heater 41 for heating the water in the disinfection box 4. The water inlet end of the disinfection box 4 is also connected to a second dosing device 42. A stirring motor 43 is provided at the upper end of the disinfection box 4. The output end of the stirring motor 43 extends downward into the disinfection box 4 and is connected to a stirrer 44. The water outlet end of the disinfection box 4 is connected to the water inlet end of the NF sodium filter membrane group 5.

[0032] Among them, the coarse filter 11 and the fine filter 12 are both inverted V-shaped stainless steel filter screens, and a coarse sludge outlet 13 and a fine sludge outlet 14 are respectively provided on one side wall of the sludge filter box 1 corresponding to the coarse filter 11 and the fine filter 12; the coarse sludge outlet 13 and the fine sludge outlet 14 are both provided with a sludge discharge valve 15.

[0033] The sewage outlet of the air flotation machine 2 is also connected to a sludge pump for discharging sludge. The sludge pump is automatically controlled by PLC.

[0034] Among them, the MBR membrane group 3 includes a biochemical reaction tank 31, an MBR membrane assembly 35 immersed in the biochemical reaction tank 31, and the MBR membrane assembly 35 is connected to an MBR outlet pipe 33 and a flushing air pipe 34 through a PE plastic pipe 32. The MBR outlet pipe 33 is connected to the water inlet end of the disinfection box 4 through a water pump 6.

[0035] Wherein, the biochemical reaction pool 31 contains aerobic pool mixed liquid.

[0036] Wherein, the NF sodium filter membrane group 5 includes three parallel sodium filter membrane units 51, the water outlet end of the sodium filter membrane unit 51 is provided with a three-way valve 53 and a concentration monitor 55, the water outlet end of the sodium filter membrane unit 51 is divided into a clean water outlet and a backflow port, the clean water outlet is provided with a flow meter 52, the backflow port is provided with a regulating valve 54, and the backflow port is connected to the water inlet end of the MBR membrane group 3.

[0037] Wherein, a pressure monitor 56 is provided on the water inlet end of the NF sodium filter membrane group 5 .

[0038] The pore size of the microfiltration membrane or ultrafiltration membrane used in the MBR membrane group 3 is 0.1-0.4 microns.

[0039] The NF sodium filter membrane group 5 uses a nanofiltration membrane with a pore size of 0.5-5 nanometers.

[0040] Wherein, a water valve is arranged on the water conduit.

[0041] The working principle of the utility model is as follows: when in use, the tail water produced by eel farming is first sent to the sludge filter box, and the sludge and large particles in the tail water are first filtered through the coarse filter screen and the fine filter screen, and then the filtered water enters the flotation machine, and the bioflocculant is added through the flotation machine in conjunction with the dosing device to coagulate the flocs, and then further filtered. The flotation filtered water after flotation is sent to the MBR membrane group for another filtration, and the flotation filtered water is reacted through the reaction tank, and then the reacted dirt is intercepted by the MBR membrane assembly, and the clean water is sent to the MBR membrane group for further filtration. The water is put into the disinfection box, and the disinfectant is added through the dosing device, and then stirred to make the water react with the agent to remove useless elements in the water. Heating with a heater can speed up the reaction and improve efficiency. At the same time, it is sterilized by heating. The disinfected water is then sent to the NF sodium filter membrane group and filtered through the sodium filter membrane unit. The color components and other particles are retained by the nanofiltration membrane and then monitored by the concentration monitor. Those that meet the requirements are discharged, and those that do not meet the requirements are returned to the MBR membrane group for another filtration treatment until they meet the emission standards.

[0042] The above shows and describes the basic principle and main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents. Anything not described in detail in the utility model is a well-known technology of those skilled in the art.

Claims

1. An eel farming tailwater comprehensive treatment system, characterized by: It includes a sludge filter box, an air flotation machine, an MBR membrane group, a disinfection box, and a NF sodium filter membrane group which are sequentially connected through water pipes and water pumps; The water inlet of the sludge filter box is connected to the aquaculture tail water, and a coarse filter screen and a fine filter screen are arranged in the sludge filter box for filtering the impurities and sludge in the tail water, and the water outlet of the sludge filter box is connected to the water inlet of the air flotation machine; The water inlet of the air flotation machine is also connected to the drug outlet of the first drug adding device, and the water outlet of the air flotation machine is connected to the water inlet of the MBR membrane group; The water outlet end of the MBR membrane group is connected to the water inlet end of the disinfection box, the disinfection box includes a heater for heating the water in the disinfection box, the water inlet end of the disinfection box is also connected to a second dosing device, a stirring motor is provided at the upper end of the disinfection box, the output end of the stirring motor extends downward into the disinfection box and is connected to a stirrer, and the water outlet end of the disinfection box is connected to the water inlet end of the NF sodium filter membrane group.

2. The eel farming tailwater comprehensive treatment system according to claim 1, characterized in that: The coarse filter screen and the fine filter screen are both inverted V-shaped stainless steel filter screens. A coarse sludge outlet and a fine sludge outlet are respectively arranged on one side wall of the sludge filter box corresponding to the coarse filter screen and the fine filter screen; and a sludge discharge valve is arranged on the coarse sludge outlet and the fine sludge outlet.

3. The eel farming tailwater comprehensive treatment system according to claim 1 is characterized by: The MBR membrane group includes a biochemical reaction tank and an MBR membrane assembly immersed in the biochemical reaction tank. The MBR membrane assembly is connected to an MBR outlet pipe and a flushing air pipe through a PE plastic pipe. The MBR outlet pipe is connected to the water inlet end of the disinfection box through a water pump.

4. The eel farming tailwater comprehensive treatment system according to claim 3 is characterized by: The biochemical reaction pool contains aerobic pool mixed liquid.

5. The eel farming tailwater comprehensive treatment system according to claim 1 is characterized by: The NF sodium filter membrane group includes three parallel sodium filter membrane units, the water outlet of the sodium filter membrane unit is provided with a three-way valve and a concentration monitor, the water outlet of the sodium filter membrane unit is divided into a clean water outlet and a backflow port, the clean water outlet is provided with a flow meter, the backflow port is provided with a regulating valve, and the backflow port is connected to the water inlet end of the MBR membrane group.

6. The eel farming tailwater comprehensive treatment system according to claim 5, characterized in that: A pressure monitor is provided on the water inlet end of the NF sodium filter membrane group.

7. The eel farming tailwater comprehensive treatment system according to claim 1 is characterized by: The pore size of the microfiltration membrane or ultrafiltration membrane used in the MBR membrane group is 0.1-0.4 microns.

8. The eel farming tailwater comprehensive treatment system according to claim 1 is characterized by: The pore size of the nanofiltration membrane used in the NF sodium filtration membrane group is 0.5-5 nanometers.

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