CN104529028B - Treatment process and device for polyculture fishpond waste water - Google Patents

Abstract

The invention discloses a process and device for treating waste water in polyculture fish ponds, belonging to the technical field of waste water treatment. The treatment process is as follows: the waste water is discharged through the grid first, and after removing weeds and other substances, it enters the collection tank for collection, and then passes through the first dosing tank, the second dosing tank, the aeration tank, the sedimentation tank, and the sand filter. Enter the reuse water pool, and the water in the reuse water pool is purified by the secondary circulation purification device to obtain purified water that can be recycled. The treatment process of the present invention first passes through the algae in the first dosing tank to make the waste self-cleaning, then passes through the biologically activated water treatment agent in the second dosing tank, and then passes through the microwave processor, aeration tank, sedimentation tank, The clean water obtained by the sand filter is sent to the reuse water pool, and a secondary circulation purification device is installed in the reuse water pool. After the adsorption of activated carbon in the activated carbon filter, the treatment of the fine filter and the reverse osmosis tank, the treatment effect is good and can be Ensure that the water treatment effect is good, the effluent quality is stable, and finally the water body meets the requirements of aquaculture.

Description

A treatment process and device for polyculture fish pond wastewater

technical field

The invention belongs to the technical field of waste water treatment, and in particular relates to a treatment process and device for mixed fish pond waste water with less environmental pollution, convenient treatment and recyclable utilization.

Background technique

With the rapid development of the aquaculture industry, only a small part of the nitrogen and phosphorus contained in the feed put in during the breeding process is assimilated by the fish, and the pollutants formed by the residual feed and fish excrement will affect the surrounding water body and sediments. Pollution caused by fish, etc. is getting more and more attention from the government and the public; at the same time, the restrictive effect of the pollution in the breeding environment on the further development of the aquaculture industry is also gradually emerging. Circulating water (sea water, fresh water) also has the advantages of short breeding cycle, high output and product price, and people have high hopes for its application in the breeding industry. However, water treatment is still the main factor restricting aquaculture. Because the traditional water treatment technology is a process involving a variety of biocatalytic reactions, the water treatment process is complicated, and the water treatment equipment occupies a large area, which is not conducive to management. In addition, the salinity of seawater Effects and other constraints, the denitrification efficiency is low, the water treatment effect is poor, and the quality of the effluent is unstable, which in turn leads to poor quality of aquatic products.

Contents of the invention

In view of the above-mentioned problems existing in the prior art, the object of the present invention is to provide a treatment process and device for polyculture fish pond wastewater that has less environmental pollution, is convenient to handle, and can be recycled and reused.

Described a kind of treatment process of polyculture fish pond wastewater is characterized in that comprising the steps:

1) Release the wastewater from the polyculture fish pond, first pass through the grille, remove weeds and other substances, and then enter the collection tank for collection;

2) When the water in the sump is collected to half the volume of the sump, put it into the first dosing barrel for the first purification;

3) After purification, the first water pump pumps the water into the second dosing barrel for secondary purification, and then it is processed by a microwave processor;

4) Put the wastewater treated by the microwave processor into the aeration tank, sedimentation tank, sand filter tank and filter it into the reuse pool;

5) The water in the reuse pool is pumped into the activated carbon filter for adsorption through the second water pump, then filtered through the fine filter, and finally returned to the reuse pool after being processed by the reverse osmosis tank to obtain purified water that can be recycled .

The process for treating wastewater from a polyculture fish pond is characterized in that algae and bacteria are cultivated in the first dosing tank described in step 2), and the anaerobic waste liquid in the wastewater is removed.

The process for treating wastewater from polyculture fish ponds is characterized in that a biologically activated water treatment agent is added to the second dosing tank described in step 3), and the biologically activated water treatment agent consists of the following parts by weight Component composition: 6-8 parts of magnesium oxide, 25-45 parts of silicon oxide, 1-3 parts of aluminum oxide, 0.5-1 part of methylene blue, 2-6 parts of sodium hypochlorite, 10-16 parts of lime.

The process for treating wastewater from polyculture fish ponds is characterized in that a biologically activated water treatment agent is added to the second dosing tank described in step 3), and the biologically activated water treatment agent consists of the following parts by weight Component composition: 7 parts of magnesium oxide, 30 parts of silicon oxide, 2 parts of aluminum oxide, 0.8 parts of methylene blue, 4 parts of sodium hypochlorite, 15 parts of lime.

The process for treating wastewater from polyculture fish ponds is characterized in that at least one layer of microporous filtration membrane is arranged in the fine filter described in step 5), and the pore size of the microporous filtration membrane is 0.2-0.4 Microns.

The treatment device for mixed fish pond wastewater is characterized in that it includes a grille, a sump, a first dosing tank, a first water pump, a second dosing tank, a microwave processor, and an aeration tank connected sequentially through pipelines. , sedimentation tank, sand filter tank and reuse water tank. After removing coarse impurities through the grid, the water enters the sump through the water inlet of the sump, and then enters the first dosing tank from the water inlet of the first dosing barrel through the water outlet of the sump. barrel, from the outlet of the first dosing barrel to the second dosing barrel through the first water pump, and then through the outlet of the second dosing barrel to enter the microwave processor, aeration tank, sedimentation tank, and sand filter in turn, and then The treated water enters the reuse water pool for collection, and a secondary circulation purification device is also installed on the reuse water pool.

The treatment device for the mixed fish pond wastewater is characterized in that the secondary circulation purification device includes a second water pump, an activated carbon filter, a fine filter and a reverse osmosis tank connected by pipelines in sequence, and the second The water inlet of the water pump is connected to the reuse water pool, and the water outlet of the reverse osmosis tank is connected to the reuse water pool, so that the secondary purified water is sent back to the reuse water pool.

The treatment device for mixed fish pond wastewater is characterized in that the grid includes a coarse grid and a fine grid.

The process for treating waste water from a mixed fish pond is characterized in that a sensitizer and an inorganic flocculant are added in the microwave processor, and the sensitizer and the inorganic flocculant are all selected from commercially available conventional sensitizers and Inorganic flocculant reagent can be used.

Compared with the prior art, the present invention has the following beneficial effects by adopting the above-mentioned technology:

1) The treatment process of the present invention is simple and easy to operate. First, the waste is self-purified through the algae in the first dosing tank, and then the biologically activated water treatment agent in the second dosing tank effectively removes nitrogen and phosphorus in the water and other impurities, and then the clean water obtained by microwave processor, aeration tank, sedimentation tank, and sand filter is sent to the reuse water pool. A secondary cycle purification device is installed in the reuse water pool. After the coarse impurities are removed by the grid, the The adsorption of activated carbon in the activated carbon filter, the treatment of the fine filter and the reverse osmosis tank can be further purified, and pure water can be obtained, which can be recycled;

2) The treatment device of the present invention is simple in structure, convenient in connection, simple in structure, small in overall floor area, low in investment cost, reasonable in design, and basically uses commonly used equipment, simple and fast in operation, good in treatment effect, and can ensure water The treatment effect is good, the effluent quality is stable, and finally the water body meets the requirements of aquaculture.

Description of drawings

Fig. 1 is a schematic structural diagram of the processing device of the present invention.

In the figure: 1-grid, 2-collection tank, 3-first dosing tank, 4-first water pump, 5-second dosing tank, 6-microwave processor, 7-aeration tank, 8-sedimentation Pool, 9-sand filter, 10-reuse water pool, 11-second water pump, 12-activated carbon filter, 13-fine filter, 14-reverse osmosis pool.

detailed description

The present invention will be further described below in conjunction with accompanying drawing of description, but protection scope of the present invention is not limited thereto:

As shown in Fig. 1, the treatment device of mixed fish pond wastewater of the present invention comprises grid 1, sump 2, the first dosing bucket 3, the first water pump 4, the second dosing bucket 5 connected by pipelines successively , microwave processor 6, aeration tank 7, sedimentation tank 8, sand filter tank 9 and reuse water tank 10, grid 1 includes coarse grid (0.5-1cm in diameter) and fine grid (0.05-0.15cm in diameter ), after removing coarse impurities through the grid 1, the water enters the sump 2 through the water inlet of the sump 2, and the water enters the first dosing barrel 3 from the water outlet of the sump 2, and enters the first dosing barrel 3 from the water inlet of the first dosing barrel 3. The water outlet of the first dosing barrel 3 enters the second dosing barrel 5 through the first water pump 4, and then enters the microwave processor 6, the aeration tank 7, the sedimentation tank 8, and the sand through the water outlet of the second dosing barrel 5 successively. Filter tank 9, after treatment, the water enters the reuse water pool 10 to collect, and the secondary circulation purification device is also set on the described reuse water pool 10, and the secondary circulation purification device includes the second water pump 11 connected by pipelines, activated carbon filter pool 12, fine filter 13 and reverse osmosis tank 14, the water inlet of the second water pump 11 is connected with the reuse water tank 10, and the water outlet of the reverse osmosis tank 14 is connected with the reuse water tank 10, and the water after secondary purification Send back to the reuse pool 10.

As shown in the figure, the polyculture fish pond wastewater treatment process of the present invention specifically relates to the following:

1) Release the waste water from the polyculture fish pond, first pass through the grid 1, remove weeds and other substances, and then enter the collection tank 2 for collection;

2) When the water in the sump 2 is collected to half the volume of the sump 2, it is put into the first dosing tank 1 for the first purification. The first dosing tank 1 is cultivated with algae and bacteria to remove the waste water. Oxygen waste liquid, so that the water can achieve self-purification;

3) After purification, the first water pump 4 pumps the water into the second dosing tank 5, and the second dosing tank 5 is filled with a biologically activated water treatment agent. The biologically activated water treatment agent is composed of the following parts by weight: Composition: 6-8 parts of magnesium oxide, 25-45 parts of silicon oxide, 1-3 parts of aluminum oxide, 0.5-1 part of methylene blue, 2-6 parts of sodium hypochlorite, 10-16 parts of lime, biological The components and parts by weight of the activated water treatment agent are as follows: 7 parts of magnesia, 30 parts of silicon oxide, 2 parts of aluminum oxide, 0.8 part of methylene blue, 4 parts of sodium hypochlorite, 15 parts of lime, through the above-mentioned activation by increasing oxygen, disinfection The biologically activated water treatment agent with sterilizing function plays a role in health maintenance, improving immunity, and promoting the growth of animals and plants. It can sterilize and sterilize the wastewater, so that the wastewater can be purified twice, and then processed by microwave processor 6 , microwave processor 6 is added with sensitizer and inorganic flocculant agent, microwave has high-frequency penetrating effect on bacteria and algae, strong killing ability, kills microorganisms in a short time, and has strong sterilization and algae killing function Among them, the cyanobacteria in the microwave field only need a very short time to gather from fine particles to large particles, turn yellow, settle and separate from water to produce violent catalytic, physical and chemical reactions, and transform into insoluble substances or gas to separate from water, and the large particles in water Molecular and refractory organic pollutants are decomposed into small molecules under the combined action of microwaves and sensitizers, and combined with inorganic flocculants to form quick-settling flocs for removal; metal ions can be directly combined with inorganic flocculants to generate Rapid precipitation of flocs; ammonia nitrogen is converted into ammonia gas and escaped; phosphorus in water is converted into insoluble phosphate and removed by precipitation;

4) Put the wastewater treated by the microwave processor 6 into the aeration tank 7 to make the sewage and the gravel swirl, so that the gravel collides and rubs to remove the organic matter on the surface of the gravel, reducing the difficulty of the subsequent treatment of the grit, and then settles in the sedimentation tank 8. Liquid and solid are separated, and then enter the reuse pool 10 after being filtered by the sand filter tank 9;

5) The water in the reused water pool 10 is pumped into the activated carbon filter 12 through the second water pump 11 to absorb and remove the color, then filtered through the fine filter 13, and finally returned to the reverse osmosis pool 14 Reuse the water pool 10 to obtain purified water that can be recycled, and at least one layer of microporous filtration membrane is arranged in the fine filter 13, and the pore size of the microporous filtration membrane is 0.2-0.4 microns.

The treatment process of the present invention is simple and easy to operate. The waste can be self-purified through the algae in the first dosing tank, and then the biologically activated water treatment agent in the second dosing tank can effectively remove impurities such as nitrogen and phosphorus in the water. , and then processed by microwave processor, aeration tank, sedimentation tank, and sand filter in turn, the clean water is sent to the reuse water pool, and a secondary cycle purification device is installed in the reuse water pool. After the coarse impurities are removed by the grid, the activated carbon The adsorption of activated carbon in the filter, the treatment of the fine filter and the reverse osmosis tank can be further purified to obtain pure water, which can be recycled; and the structure of the treatment device is simple, convenient to connect, simple in structure, small in overall footprint, and low in investment. The cost is low, the design is reasonable, and the commonly used equipment is basically used. The operation is simple and fast, and the treatment effect is good, which can ensure good water treatment effect and stable water quality, and finally make the water body meet the requirements of aquaculture.

Claims (6)

1. a kind of handling process raising together with fishpond waste water is it is characterised in that comprise the steps：

1）Fishpond waste water will be raised together with release, first pass through grid（1）, after removing weeds material, enter collecting-tank（2）Collect；

2）Work as collecting-tank（2）Interior water collection is to collecting-tank（2）During volume half, put into the first medicine-adding bin（3）In carry out for the first time Purify；

3）Again by the first water pump after purification（4）Water is pumped into the second medicine-adding bin（5）Interior, carry out double purification, then at microwave Reason device（6）Process, described the second medicine-adding bin（5）Interior addition biological activating water treatment agent, described biological activating water treatment agent It is grouped into by the group of following parts by weight：Magnesium oxide 6-8 part, silicon oxide 25-45 part, aluminium oxide 1-3 part, methyl blue 0.5-1 part, Sodium hypochlorite 2-6 part, Calx 10-16 part；

4）By microwave treater（6）Waste water after process puts into Aeration tank（7）, sedimentation tank（8）, sand filter（9）Enter after filtration Reuse pool（10）；

5）By the second water pump（11）Water in reuse pool is pumped into activated carbon filter（12）After absorption, then through fine filter（13） Filter, eventually pass reverse osmosiss pond（14）Reuse pool is returned after effect（10）, the water that can recycle after being purified.

2. a kind of handling process raising together with fishpond waste water according to claim 1 is it is characterised in that step 2）Described One medicine-adding bin（3）Culture has algae and antibacterial, goes the anaerobic waste in waste water.

3. a kind of handling process raising together with fishpond waste water according to claim 1 is it is characterised in that step 3）Described in Second medicine-adding bin（5）Interior addition biological activating water treatment agent, described biological activating water treatment agent is by the group of following parts by weight It is grouped into：7 parts of magnesium oxide, 30 parts of silicon oxide, 2 parts of aluminium oxide, 0.8 part of methyl blue, 4 parts of sodium hypochlorite, 15 parts of Calx.

4. a kind of handling process raising together with fishpond waste water according to claim 1 is it is characterised in that step 5）Described in Fine filter（13）Interior setting at least one of which micropore filtering film, the pore size of described micropore filtering film is 0.2-0.4 micron.

5. a kind of handling process raising together with fishpond waste water according to claim 1 is it is characterised in that microwave treater（6）Interior Added with sensitizer and inorganic wadding agent agent.

6. a kind of processing meanss of the handling process raising together with fishpond waste water according to claim 1 are it is characterised in that include Pass sequentially through the grid of pipeline connection（1）, collecting-tank（2）, the first medicine-adding bin（3）, the first water pump（4）, the second medicine-adding bin（5）、 Microwave treater（6）, Aeration tank（7）, sedimentation tank（8）, sand filter（9）And reuse pool（10）, water is through grid（1）Remove slightly miscellaneous After matter, through collecting-tank（2）Water inlet enters collecting-tank（2）, then through collecting-tank（2）Outlet is from the first medicine-adding bin（3）Water inlet Mouth enters the first medicine-adding bin（3）, from the first medicine-adding bin（3）Outlet through the first water pump（4）Enter the second medicine-adding bin（5）, then Through the second medicine-adding bin（5）Outlet sequentially enter microwave treater（6）, Aeration tank（7）, sedimentation tank（8）, sand filter（9）, warp After process, water enters reuse pool（10）Collect, described reuse pool（10）On also set up secondary cycle purifier, described Secondary cycle purifier include passing sequentially through the second water pump of pipeline connection（11）, activated carbon filter（12）, fine filter （13）And reverse osmosiss pond（14）, described the second water pump（11）Water inlet and reuse pool（10）Connect, reverse osmosiss pond（14） Outlet and reuse pool（10）Connect, the water after double purification is returned to reuse pool（10）, described grid（1）Bag Include coarse rack and fine fack.