Construction method for treating tail water of river section type fish pond

Abstract

The application discloses a kind of construction method for treating tail water of fish pond by river section, belong to sewage treatment technical field.The following steps are included: setting up river of cross shape to divide fish pond into several grid units, and the parallel side of the river of cross shape forms main stream and branch stream;Along the direction of water flow of the branch stream, steel overflow gate, heavy pollutant sedimentation tank, heavy pollutant regulating tank and integrated sewage treatment unit are sequentially arranged;Along the direction of water flow of the main stream, a plurality of sectional multi-stage circulating sewage treatment units are arranged, the sectional multi-stage circulating sewage treatment unit includes main stream sedimentation zone and main stream aeration zone arranged sequentially, and the main stream sedimentation zone includes a plurality of light pollutant sedimentation tanks connected sequentially according to the decreasing order of nitrogen and phosphorus concentration in breeding tail water;The main stream aeration zone is arranged at the intersection of the branch stream and the main stream, for decomposing nitrogen and phosphorus substances in breeding tail water, to improve the purification effect of fish pond tail water by comprehensive treatment.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of sewage treatment, and particularly relates to a river and creek segmented fish pond tail water treatment construction method. BACKGROUND

[0002] In recent years, China's aquaculture industry in Foshan has achieved remarkable results, with a wide variety of species and increasing production. However, during the development of the industry, we are also facing a serious problem, that is, the massive discharge of fish pond tail water has caused serious pollution to the environment. With the continuous improvement of environmental awareness today, how to achieve sustainable development of the aquaculture industry has become the focus of attention within and outside the industry.

[0003] Fish pond tail water contains a large amount of organic matter, nutrients and microorganisms. If discharged directly into the surrounding water, it will lead to eutrophication of the water body, and further affect the balance of the aquatic ecosystem. In order to solve this problem, researchers and practitioners have tried various fish pond tail water treatment methods, such as physical, chemical and biological treatment. However, these traditional methods have certain limitations in terms of treatment effect, treatment cost, etc., and are difficult to meet the current environmental protection requirements. In the face of this challenge, it is particularly important to develop an efficient, environmentally friendly and economical fish pond tail water treatment method. This method not only effectively reduces the pollutant content in the tail water and achieves the emission reduction target, but also fully utilizes resources and promotes green economic development. SUMMARY

[0004] The purpose of the present application is to provide a river and creek segmented fish pond tail water treatment construction method for reducing fish pond tail water treatment cost and improving fish pond tail water purification effect.

[0005] The purpose of the present application can be achieved by the following technical solutions:

[0006] A river and creek segmented fish pond tail water treatment construction method, comprising the following steps:

[0007] M1, setting a well-shaped river and creek to divide the fish pond into a plurality of grid units, wherein two parallel sides of the well-shaped river and creek form two main streams, and the two main streams are connected to an external water source; the other two parallel sides of the well-shaped river and creek are divided into a plurality of branch streams by the two main streams; the cultivation tail water in the grid unit is collected into the main stream through the branch stream;

[0008] M2, a steel overflow gate, a heavy pollutant sedimentation tank, a heavy pollutant regulating tank and an integrated sewage treatment unit are sequentially arranged along the branch water flow direction; the integrated tail water treatment unit comprises a solid-liquid separator, an anaerobic tank, an anoxic tank, an aerobic tank, a disinfection tank and an adsorption tank which are sequentially arranged; the solid-liquid separator is used for separating solid particles in the aquaculture tail water; the anaerobic tank, the anoxic tank and the aerobic tank are used for degrading organic matters in the aquaculture tail water; the disinfection tank is used for disinfecting and sterilizing the aquaculture tail water; and the adsorption tank is used for adsorbing residual nitrogen and phosphorus substances in the aquaculture tail water;

[0009] M3, a plurality of segmented multi-stage circulating sewage treatment units are arranged along the main water flow direction, the segmented multi-stage circulating sewage treatment unit comprises a main water inflow sedimentation area and a main water inflow aeration area which are sequentially arranged and can be circularly connected; the main water inflow sedimentation area comprises a plurality of light pollutant sedimentation tanks which are sequentially connected in a descending order of nitrogen and phosphorus concentration in the aquaculture tail water; the light pollutant sedimentation tank is provided with a biological floating bed; and the main water inflow aeration area is arranged at the intersection of the branch water inflow and the main water inflow, and is used for decomposing nitrogen and phosphorus substances in the aquaculture tail water;

[0010] M4, purification plants are planted along both sides of the well-shaped river, and the purification plants comprise cassava and giant reed.

[0011] As a preferred technical scheme of the present application, the anaerobic tank is filled with anaerobic activated sludge, and the preparation of the anaerobic activated sludge comprises the following steps:

[0012] S1, collecting dead fish generated in fish pond aquaculture, scraping surimi, homogenizing, then mixing with deionized water, rinsing for 5-10 min, stirring at 30-40 DEG C for 20-30 min, adjusting pH to 5-7, standing for 1-2 h, centrifuging at 4000 r / min at 4 DEG C for 1-1.5 h, and taking the precipitate to obtain surimi protein;

[0013] S2, mixing the surimi protein with deionized water, adding papain and aminopeptidase, adjusting pH to 5.5-7.5, stirring at 50-60 DEG C for 20-30 h, heating to 90-95 DEG C for 15-20 min, filtering, taking the liquid phase, heating and concentrating to 1 / 10-1 / 5 of the original volume, and vacuum drying at 50 DEG C and 0.1 MPa for 25-35 h to obtain surimi hydrolyzed protein;

[0014] S3, polishing, crushing, sieving, screening, air-drying and cooling the cassava to obtain cassava starch;

[0015] S4, the cassava starch, alpha-amylase, starch glucosidase, citric acid-sodium phosphate buffer are mixed, and are incubated and stirred at 50-55 DEG C for 3-4h, anhydrous ethanol is added, and is placed for 2-3h, is centrifugated, and the solid phase is washed with water, and dried to obtain material A;

[0016] S5, the material A, silane coupling agent KH792, deionized water are mixed, pH is adjusted to 4-5, and is stirred in 55 DEG C water bath for 6-8h, is washed, and is vacuum dried at 50 DEG C, 0.1MPa for 3-4h to obtain material B;

[0017] S6, the material C is obtained by mixing the six water trichloride, the trimesic acid, the deionized water, ultrasonic dispersion is 20-30min, then reflux is 24h under the condition of 100 DEG C, is centrifuged, and freeze-dried to obtain material C;

[0018] S7, the material B, deionized water, material C are mixed, pH is adjusted to 5-6, ultrasonic dispersion is 10-20min, then the minced fish hydrolyzed protein is added, and then the genipin solution is added, and is stirred at 25-35 DEG C for 2-3h, is filtered, and dried to obtain a composite carrier;

[0019] S8, the cassava leaf, the royal bamboo grass are chopped, and then mixed with the composite carrier, sodium lactate, yeast extract, diatomite, fish manure, external water source, and are placed in a fermentation tank for sealed fermentation to obtain the anaerobic activated sludge.

[0020] As a preferred technical scheme of the present application, in step S1, the ratio of the minced fish and deionized water is 1-2g:8-10mL.

[0021] As a preferred technical scheme of the present application, in step S2, the ratio of the minced fish protein, deionized water, papain and aminopeptidase is 1-2g:50-80mL:5000U:5000U.

[0022] As a preferred technical scheme of the present application, in step S4, the ratio of the cassava starch, alpha-amylase, starch glucosidase, citric acid-sodium phosphate buffer and anhydrous ethanol is 10-15g:100-300U:1500-3000U:50-60mL:500mL; the pH of the citric acid-sodium phosphate buffer is 5.

[0023] As a preferred technical scheme of the present application, in step S5, the mass ratio of the material A, silane coupling agent KH792 and deionized water is 3-4:0.2-0.4:60-80.

[0024] As a preferred technical scheme of the present application, in step S6, the ratio of the six water trichloride, the trimesic acid and the deionized water is 4-6g:4-4.5g:100mL.

[0025] As a preferred technical solution of the present application, in step S7, the dosing ratio of the material B, deionized water, material C, surimi hydrolyzed protein, and genipin solution is 1.5-2.5 g: 100 mL: 4-5 g: 1-2 g: 80 mL.

[0026] The preparation of the genipin solution comprises the following steps:

[0027] Take 25 g of genipin and dissolve it in 60 mL of anhydrous ethanol, stir, add 90 mL of ethyl acetate and 850 mL of n-hexane, and stir to obtain the genipin solution.

[0028] As a preferred technical solution of the present application, in step S8, the mass ratio of cassava leaves, megthun, composite carrier, sodium lactate, yeast extract, diatomite, fish manure, and external water source is 200-300 g: 250-350 g: 1-2 kg: 5-8 g: 8-10 g: 4-6 kg: 6-8 kg: 5 kg; the fermentation refers to introducing nitrogen gas with a flow rate of 8 L / min into the fermentation tank for 30-40 min, completely discharging the oxygen in the fermentation tank, and then fermenting at 38℃ for 3-4 d.

[0029] As a preferred technical solution of the present application, the anoxic tank is filled with anoxic activated sludge, and the preparation of the anoxic activated sludge comprises the following steps:

[0030] Take cassava leaves and megthun and chop them, then mix them with the composite carrier, sodium lactate, yeast extract, diatomite, fish manure, and external water source, and place them in a fermentation tank for fermentation to obtain the anoxic activated sludge.

[0031] As a preferred technical solution of the present application, the mass ratio of cassava leaves, megthun, composite carrier, sodium lactate, yeast extract, diatomite, fish manure, and external water source is 200-300 g: 250-350 g: 1-2 kg: 5-8 g: 400-600 g: 4-6 kg: 1-1.5 kg: 2 kg; the fermentation refers to fermenting at 25-28℃ and DO of 0.3-0.5 mg / L for 3-4 d.

[0032] As a preferred technical solution of the present application, the yeast extract is purchased from Shenzhen Xingkaixie Biological Technology Co., Ltd.

[0033] As a preferred technical solution of the present application, the aerobic tank is filled with aerobic activated sludge, and the preparation of the aerobic activated sludge comprises the following steps:

[0034] The cassava leaves and the giant reed are chopped, and then mixed with the composite carrier, sodium lactate, aerobic denitrifying bacteria, diatomite, fish manure and external water source, and placed in a fermentation tank for fermentation to obtain the aerobic activated sludge.

[0035] As a preferred technical solution of the present application, the proportioning ratio of the cassava leaves, the giant reed, the composite carrier, the sodium lactate, the aerobic denitrifying bacteria, the diatomite, the fish manure and the external water source is 200-300g:250-350g:1-2kg:5-8g:0.63*10 6 -2.52*10 6 CFU:4-6kg:0.8-1.2kg:1kg; the fermentation refers to fermentation under the condition of 25-28℃ and DO of 2.5-2.8mg / L for 3-4d.

[0036] As a preferred technical solution of the present application, the adsorption tank is a fixed bed adsorber, and the fixed bed adsorber is filled with an adsorbent, and the preparation of the adsorbent comprises the following steps:

[0037] A1, washing the bone frame after removing surimi in hot water at 80-100℃ for 30-40min, drying, crushing, grinding, passing through a 100 mesh screen to obtain bone powder;

[0038] A2, taking the bone powder to be carbonized in a nitrogen atmosphere, soaking the carbonized bone powder in a potassium carbonate solution for 18-24h, filtering, taking the solid phase to dry, and activating the dried bone powder in a nitrogen atmosphere, cooling, washing, filtering, and drying to obtain bone powder activated carbon;

[0039] The carbonization refers to pyrolysis at 450-500℃ for 1-2h; the concentration of the potassium carbonate solution is 0.5mol / L; the activation refers to activation at 650-700℃ for 1-2h; and the mass ratio of the bone powder to the potassium carbonate solution is 10-12:30-40;

[0040] A3, mixing ferric chloride hexahydrate and deionized water, ultrasonic dispersion for 30-40min, adding the bone powder activated carbon, water bath heating at 90℃ under sealed condition for 2-3h, washing, drying to obtain the adsorbent; the mass ratio of the ferric chloride hexahydrate, deionized water and bone powder activated carbon is 1-1.5:100:5-6.

[0041] As a preferred technical solution of the present application, the cassava and the giant reed are staggered planted on both sides of the river;

[0042] The planting distance between the cassavas is 1-1.5m;

[0043] The planting distance of the giant reed is 0.5-1m;

[0044] The planting distance between the cassava and the melinis nutans is 2-3m;

[0045] The cassava and the melinis nutans have good water purification effects, the cassava has developed root system, can effectively absorb nutrients in water, reduce the nitrogen and phosphorus content in water, meanwhile, the stems of the cassava can also play a role in soil fixation and bank protection, preventing river bank erosion. The root system of the melinis nutans can also absorb harmful substances in water, improving the self-purification ability of water. The cassava and the melinis nutans are planted together on both sides of the river to jointly play the role of purifying water, forming a multi-level purification system and improving the water purification effect. Meanwhile, it is also beneficial to improve the land utilization rate, reduce the planting cost and increase the economic benefit.

[0046] The beneficial effects of the present application are as follows:

[0047] The present application provides a river section type fish pond tail water treatment construction method, through specific process steps, the fish pond is processed in sections according to the direction and topographic features of the river, achieving the purposes of efficient emission reduction, environmental protection and resource utilization. Economic crops are planted to assist the integrated tail water treatment unit to purify the fish pond tail water, and the crops can also be used to make biomass materials for purifying the fish pond tail water, realizing deep purification of the tail water. The resource is recycled, which meets the concept of sustainable development. DETAILED DESCRIPTION

[0048] In order to further illustrate the technical means and effects adopted by the present application to achieve the predetermined purposes, the specific embodiments, structures, features and effects according to the present application are described in detail as follows in combination with the embodiments.

[0049] Embodiment 1

[0050] A river section type fish pond tail water treatment construction method, comprising the following steps:

[0051] M1, setting a well-shaped river to divide the fish pond into a plurality of grid units, wherein two parallel sides of the well-shaped river form two main rivers to connect external water sources; the other two parallel sides of the well-shaped river are divided into a plurality of branch rivers by the two main rivers; the breeding tail water in the grid unit flows into the main river through the branch river;

[0052] M2, a steel overflow gate, a heavy pollutant sedimentation tank, a heavy pollutant adjusting tank and an integrated sewage treatment unit are sequentially arranged along the flow direction of the branch river; the integrated tail water treatment unit comprises a solid-liquid separator, an anaerobic tank, an anoxic tank, an aerobic tank, a disinfection tank and an adsorption tank which are sequentially arranged; the solid-liquid separator is used for separating solid particles in the breeding tail water; the anaerobic tank, the anoxic tank and the aerobic tank are used for degrading organic matter in the breeding tail water; the disinfection tank is used for disinfecting and sterilizing the breeding tail water; and the adsorption tank is used for adsorbing residual nitrogen and phosphorus substances in the breeding tail water;

[0053] For the heavy pollution area of branch, through the new steel overflow gate, the effective interception of sewage is realized, which prevents it from flowing into the main stream, thereby avoiding further pollution of the water body. The heavy pollution sedimentation tank and the heavy pollution adjusting tank can effectively remove suspended solids in the water body and adjust the water volume. Then, through the sewage lifting pump, the treated aquaculture tail water is transported to the integrated sewage treatment unit, and the advanced anaerobic, anoxic and aerobic treatment process is adopted to realize the deep purification of the aquaculture tail water, so as to ensure that the water body meets the discharge standard and is discharged into the main stream for fishpond water replenishment;

[0054] M3, a plurality of segmented multi-stage circulating sewage treatment units are arranged along the direction of the main stream flow, the segmented multi-stage circulating sewage treatment unit comprises a main stream sedimentation zone and a main stream aeration zone arranged in sequence, and the main stream sedimentation zone and the main stream aeration zone are circularly connected; the main stream sedimentation zone comprises a plurality of light pollution sedimentation tanks connected in sequence according to the decreasing order of nitrogen and phosphorus concentration in the aquaculture tail water; the light pollution sedimentation tank is provided with a biological floating bed; the main stream aeration zone is arranged at the intersection of the branch and the main stream, and the main stream aeration zone is used for decomposing nitrogen and phosphorus substances in the aquaculture tail water;

[0055] When the main stream sedimentation zone is laid out, the middle section of the main stream is given priority to, and the aquaculture tail water is introduced into the main stream sedimentation zone for treatment, which effectively prevents the random diffusion of organic matter, nitrogen and phosphorus and other pollutants contained in the aquaculture tail water, thereby ensuring the water quality safety of other rivers and streams. In the main stream sedimentation zone, the ecological floating bed and the biological filler combined mode are arranged, which can not only reduce the occupation of the river flow area and ensure the normal flood discharge and drainage function of the river, but also effectively intercept the suspended solids in the water body and significantly reduce the content. In addition, the bacteria group structure formed on the surface and inside of the biological filler at the bottom of the ecological floating bed covers aerobic, anoxic and anaerobic environments, which is conducive to the removal of COD, N and P and other pollutants in the water body by different microorganisms, thereby further improving the water quality. The ecological floating bed is also equipped with a sliding block and a sliding rail, so that the ecological floating bed can freely rise and fall along the sliding rail according to the water level change, or be stably fixed on the river by square steel, which can also rise and fall with the water level change, on the one hand, providing convenience for subsequent ship operation and maintenance, and on the other hand, effectively avoiding the waterlogging of the aquatic plants of the ecological floating bed due to high water level;

[0056] The main surge aeration zone is arranged at the intersection of the main surge and the branch surge, and an intelligent solar aeration system is introduced in the main surge aeration zone, which can not only effectively improve the water circulation efficiency, but also significantly enhance the activity and reproduction capacity of microorganisms in the sediment. In addition, it can rapidly decompose pollutants such as N and P, effectively reduce the odor of the water body, and prevent the breeding of mosquitoes and algae. In order to further improve the efficiency of the system, an automatic control system is integrated, the appropriate content of dissolved oxygen is set, and the oxygen sensor is used to monitor the oxygen content in the water body in real time. Once the monitoring value is lower than the set standard, the system will automatically start the aeration function to ensure that the dissolved oxygen in the water body always remains at an appropriate level, reducing operating costs and carbon emissions, actively responding to the call of the state for energy saving and emission reduction, and improving the overall water quality.

[0057] The segmented multi-stage circulating sewage treatment unit can be adjusted and optimized according to environmental conditions such as temperature, humidity and water quality changes to achieve the best treatment effect. When a single unit faces pollutant concentration exceeding its carrying capacity, the pollutants can flow into the next unit for further treatment to meet different treatment needs.

[0058] M4, purification plants are planted along both sides of the well-shaped river, the purification plants include cassava and royal bamboo, the cassava and royal bamboo are staggered planted on both sides of the river, the planting spacing between the cassava is 1m, the planting spacing of the royal bamboo is 0.5m, and the planting spacing between the cassava and the royal bamboo is 2m.

[0059] The anaerobic tank is filled with anaerobic activated sludge, and the preparation of the anaerobic activated sludge includes the following steps:

[0060] S1, collect dead fish generated in fish pond culture, scrape surimi, homogenize, then mix with deionized water, rinse for 5min, stir at 30℃ for 20min, adjust pH to 5, stand for 1h, centrifuge at 4000r / min at 4℃ for 1h, take the precipitate to obtain surimi protein; the dosing ratio of surimi and deionized water is 1g:8mL;

[0061] S2, mix the surimi protein and deionized water, add papain and aminopeptidase, adjust pH to 5.5, stir at 50℃ for 20h, heat to 90℃ and keep for 15min, filter, take the liquid phase, heat and concentrate to 1 / 10 of the original volume, vacuum dry at 50℃ and 0.1MPa for 25h to obtain surimi hydrolyzed protein; the dosing ratio of surimi protein, deionized water, papain and aminopeptidase is 1g:50mL:5000U:5000U;

[0062] S3, polish the cassava, crush, sieve, dry, and cool to obtain cassava starch;

[0063] S4, the cassava starch, alpha-amylase, starch glucosidase, citric acid-sodium phosphate buffer are mixed, and are incubated and stirred at 50 DEG C for 3h, anhydrous ethanol is added, and is placed for 2h, centrifuged, and the solid phase is washed with water, dried, to obtain material A;The ratio of the cassava starch, alpha-amylase, starch glucosidase, citric acid-sodium phosphate buffer, anhydrous ethanol is 10g:100U:1500U:50mL:500mL;The pH of the citric acid-sodium phosphate buffer is 5;

[0064] S5, the material A, silane coupling agent KH792, deionized water are mixed, the pH is adjusted to 4, and is stirred in a water bath at 55 DEG C for 6h, washed, and vacuum dried at 50 DEG C, 0.1MPa for 3h, to obtain material B;The mass ratio of the material A, silane coupling agent KH792, deionized water is 3:0.2:60;

[0065] S6, the ferric chloride hexahydrate, trimesic acid, deionized water are mixed, ultrasonic dispersion is carried out for 20min, then refluxed at 100 DEG C for 24h, centrifuged, and freeze-dried, to obtain material C;The ratio of the ferric chloride hexahydrate, trimesic acid, deionized water is 4g:4g:100mL;

[0066] S7, the material B, deionized water, material C are mixed, the pH is adjusted to 5, ultrasonic dispersion is carried out for 10min, then fish surimi hydrolyzed protein is added, and then genipin solution is added, stirred at 25 DEG C for 2h, filtered, dried, to obtain a composite carrier;The ratio of the material B, deionized water, material C, fish surimi hydrolyzed protein, genipin solution is 1.5g:100mL:4g:1g:80mL;

[0067] The preparation of the genipin solution comprises the following steps:

[0068] 25g of genipin is dissolved in 60mL of anhydrous ethanol, stirred for 25min, 90mL of ethyl acetate and 850mL of n-hexane are added, and stirred for 15min, to obtain the genipin solution;

[0069] S8, the cassava leaves and pennisetum hydrid are chopped, then mixed with the composite carrier, sodium lactate, yeast extract, diatomite, fish manure and external water source, and sealed in a fermentation tank for fermentation, to obtain the anaerobic activated sludge;The mass ratio of the cassava leaves, pennisetum hydrid, composite carrier, sodium lactate, yeast extract, diatomite, fish manure and external water source is 200g:250g:1kg:5g:8g:4kg:6kg:5kg;The fermentation refers to that nitrogen gas with a flow rate of 8L / min is introduced into the fermentation tank for 30min, and then oxygen in the fermentation tank is completely discharged, and then fermented at 38 DEG C for 3d.

[0070] The anoxic tank is filled with anoxic activated sludge, and the preparation of the anoxic activated sludge comprises the following steps: chopping cassava leaves and giant reed, then mixing the cassava leaves and the giant reed with a composite carrier, sodium lactate, yeast extract, diatomite, fish manure and an external water source, and placing the mixture in a fermentation tank for fermentation, thereby obtaining the anoxic activated sludge; the mass ratio of the cassava leaves, the giant reed, the composite carrier, the sodium lactate, the yeast extract, the diatomite, the fish manure and the external water source is 200g:250g:1kg:5g:400g:4kg:1kg:2kg; the fermentation refers to fermentation at 25℃ and a DO of 0.3mg / L for 3d.

[0071] The aerobic tank is filled with aerobic activated sludge, and the preparation of the aerobic activated sludge comprises the following steps: chopping cassava leaves and giant reed, then mixing the cassava leaves and the giant reed with a composite carrier, sodium lactate, aerobic denitrifying bacteria, diatomite, fish manure and an external water source, and placing the mixture in a fermentation tank for fermentation, thereby obtaining the aerobic activated sludge; the mass ratio of the cassava leaves, the giant reed, the composite carrier, the sodium lactate, the aerobic denitrifying bacteria, the diatomite, the fish manure and the external water source is 200g:250g:1kg:5g:0.63×10 6 CFU:4kg:0.8kg:1kg; the fermentation refers to fermentation at 25℃ and a DO of 2.5mg / L for 3d.

[0072] The adsorption tank is a fixed-bed adsorber, and the fixed-bed adsorber is filled with an adsorbent, and the preparation of the adsorbent comprises the following steps:

[0073] A1, washing the bone frame after removing surimi in hot water at 80℃ for 30min, drying, crushing, grinding, passing through a 100-mesh screen, and obtaining bone powder;

[0074] A2, carbonizing the bone powder in a nitrogen atmosphere, soaking the carbonized bone powder in a potassium carbonate solution for 18h, filtering, drying the solid phase, activating the dried bone powder in a nitrogen atmosphere, cooling, washing, filtering, and drying, and obtaining bone powder activated carbon;

[0075] The carbonization refers to pyrolysis at 450℃ for 1h; the concentration of the potassium carbonate solution is 0.5mol / L; the activation refers to activation at 650℃ for 1h; and the mass ratio of the bone powder to the potassium carbonate solution is 10:30;

[0076] A3, mixing ferric chloride hexahydrate and deionized water, ultrasonic dispersion for 30min, adding the bone powder activated carbon, heating in a water bath under sealed conditions at 90℃ for 2h, washing, and drying, thereby obtaining the adsorbent; the mass ratio of the ferric chloride hexahydrate, the deionized water and the bone powder activated carbon is 1:100:5.

[0077] Wherein, 15kg anaerobic activated sludge is used to treat 40h per ton of fish pond effluent, 15kg anoxic activated sludge is used to treat 38h, 15kg aerobic activated sludge is used to treat 38h, 20kg adsorbent is used for treatment, and the treatment results are shown in Table 1.

[0078] Example 2

[0079] The difference from example 1 is that the purification plant includes cassava and giant reed, the cassava and giant reed are staggered planted on both sides of the river; the planting spacing of the cassava is 1.2m; the planting spacing of the giant reed is 0.8m; the planting spacing between the cassava and the giant reed is 2.5m.

[0080] The anaerobic tank is filled with anaerobic activated sludge, and the preparation of the anaerobic activated sludge includes the following steps:

[0081] S1, collect the dead fish produced by fish pond culture, scrape the surimi, homogenize, then mix with deionized water, rinse for 8min, stir at 35℃ for 25min, adjust the pH to 6, stand for 1.5h, centrifuge at 4000r / min at 4℃ for 1.2h, take the precipitate to obtain surimi protein; the dosing ratio of the surimi and deionized water is 1.5g:9mL;

[0082] S2, mix the surimi protein and deionized water, add papain and aminopeptidase, adjust the pH to 6.5, stir at 55℃ for 25h, heat to 92℃ and keep for 18min, filter, take the liquid phase, heat and concentrate to 3 / 20 of the original volume, vacuum dry at 50℃ and 0.1MPa for 30h to obtain surimi hydrolyzed protein; the dosing ratio of the surimi protein, deionized water, papain and aminopeptidase is 1.5g:65mL:5000U:5000U;

[0083] S3, polish the cassava, crush, sieve, dry in the wind, and cool to obtain cassava starch after treatment;

[0084] S4, mix the cassava starch, alpha-amylase, starch glucosidase, citric acid-sodium phosphate buffer, stir at 52℃ for 3.5h, add anhydrous ethanol, stand for 2.5h, centrifuge, take the solid phase, wash, dry to obtain material A; the dosing ratio of the cassava starch, alpha-amylase, starch glucosidase, citric acid-sodium phosphate buffer and anhydrous ethanol is 12g:200U:2200U:55mL:500mL; the pH of the citric acid-sodium phosphate buffer is 5;

[0085] S5, taking the material A, silane coupling agent KH792, deionized water, adjusting pH to 4.5, stirring in 55℃ water bath for 7h, washing, vacuum drying at 50℃, 0.1MPa for 3.5h, to obtain material B; the mass ratio of the material A, silane coupling agent KH792, deionized water is 3.5:0.3:70;

[0086] S6, taking the material A, silane coupling agent KH792, deionized water, adjusting pH to 4.5, stirring in 55℃ water bath for 7h, washing, vacuum drying at 50℃, 0.1MPa for 3.5h, to obtain material B; the mass ratio of the material A, silane coupling agent KH792, deionized water is 3.5:0.3:70;

[0087] S7, taking the material B, deionized water, material C, adjusting pH to 5.5, ultrasonic dispersion for 15min, then adding surimi hydrolyzed protein, and then adding genipin solution, stirring at 30℃ for 2.5h, filtering, drying, to obtain a composite carrier; the amount ratio of the material B, deionized water, material C, surimi hydrolyzed protein, genipin solution is 2g:100mL:4.5g:1.5g:80mL;

[0088] The preparation of the genipin solution comprises the following steps:

[0089] Taking 25g genipin dissolved in 60mL anhydrous ethanol, stirring for 25min, adding 90mL ethyl acetate and 850mL n-hexane, stirring for 15min, to obtain the genipin solution;

[0090] S8, taking cassava leaves and luchong grass, chopping, then mixing with the composite carrier, sodium lactate, yeast extract, diatomite, fish manure, external water source, sealing in a fermentation tank for fermentation, to obtain the anaerobic activated sludge; the mass ratio of the cassava leaves, luchong grass, composite carrier, sodium lactate, yeast extract, diatomite, fish manure, external water source is 250g:300g:1.5kg:6.5g:9g:5kg:7kg:5kg; the fermentation refers to introducing nitrogen gas with a flow rate of 8L / min into the fermentation tank for 35min, completely discharging oxygen in the fermentation tank, and then fermenting at 38℃ for 3.5d.

[0091] The anoxic tank is filled with anoxic activated sludge, and the preparation of the anoxic activated sludge comprises the following steps: chopping cassava leaves and giant reed, then mixing the cassava leaves and the giant reed with a composite carrier, sodium lactate, yeast extract, diatomite, fish manure and an external water source, and placing the mixture in a fermentation tank for fermentation, so that the anoxic activated sludge is obtained; the mass ratio of the cassava leaves, the giant reed, the composite carrier, the sodium lactate, the yeast extract, the diatomite, the fish manure and the external water source is 250g:300g:1.5kg:7g:500g:5kg:1.2kg:2kg; the fermentation refers to fermentation under the condition of 26℃ and DO of 0.4mg / L for 3.5d.

[0092] The aerobic tank is filled with aerobic activated sludge, and the preparation of the aerobic activated sludge comprises the following steps: chopping cassava leaves and giant reed, then mixing the cassava leaves and the giant reed with a composite carrier, sodium lactate, aerobic denitrifying bacteria, diatomite, fish manure and an external water source, and placing the mixture in a fermentation tank for fermentation, so that the aerobic activated sludge is obtained; the mass ratio of the cassava leaves, the giant reed, the composite carrier, the sodium lactate, the aerobic denitrifying bacteria, the diatomite, the fish manure and the external water source is 250g:300g:1.5kg:6g:1.47×10 6 CFU:5kg:1kg:1kg; the fermentation refers to fermentation under the condition of 26℃ and DO of 2.7mg / L for 3.5d.

[0093] The adsorption tank is a fixed bed adsorber, and the fixed bed adsorber is filled with an adsorbent, and the preparation of the adsorbent comprises the following steps:

[0094] A1, washing the bone frame after removing surimi in hot water at 90℃ for 35min, drying, crushing, grinding, passing through a 100 mesh screen, and obtaining bone powder;

[0095] A2, carbonizing the bone powder in a nitrogen atmosphere, soaking the carbonized bone powder in a potassium carbonate solution for 20h, filtering, drying the solid phase, activating the dried bone powder in a nitrogen atmosphere, cooling, washing, filtering, and drying, and obtaining bone powder activated carbon;

[0096] The carbonization refers to pyrolysis at 480℃ for 1.5h; the concentration of the potassium carbonate solution is 0.5mol / L; the activation refers to activation at 680℃ for 1.5h; and the mass ratio of the bone powder and the potassium carbonate solution is 11:35;

[0097] A3, mixing ferric chloride hexahydrate and deionized water, ultrasonic dispersion for 35min, adding the bone powder activated carbon, heating in a water bath under sealed conditions at 90℃ for 2.5h, washing, and drying, so that the adsorbent is obtained; the mass ratio of the ferric chloride hexahydrate, the deionized water and the bone powder activated carbon is 1.2:100:5.5.

[0098] The 15 kg of anaerobic activated sludge is used to treat 40 h of fish pond effluent per ton, 15 kg of anoxic activated sludge is used to treat 38 h of fish pond effluent per ton, 15 kg of aerobic activated sludge is used to treat 38 h of fish pond effluent per ton, and 20 kg of adsorbent is used to treat fish pond effluent per ton. The treatment results are shown in Table 1.

[0099] Example 3

[0100] The difference from Example 1 is that the purification plants include cassava and giant reed, and the cassava and giant reed are staggered and planted on both sides of the river.

[0101] The anaerobic tank is filled with anaerobic activated sludge, and the preparation of the anaerobic activated sludge includes the following steps:

[0102] S1, collect dead fish produced by fish pond breeding, scrape surimi, homogenize, then mix with deionized water, rinse for 10 min, stir at 40℃ for 30 min, adjust pH to 7, stand for 2 h, centrifuge at 4000 r / min at 4℃ for 1.5 h, take the precipitate to obtain surimi protein; the dosing ratio of surimi and deionized water is 2g:10mL;

[0103] S2, mix the surimi protein and deionized water, add papain and aminopeptidase, adjust pH to 7.5, stir at 60℃ for 30 h, heat to 95℃ and keep for 20 min, filter, take the liquid phase, heat and concentrate to 1 / 5 of the original volume, vacuum dry at 50℃ and 0.1 MPa for 35 h to obtain surimi hydrolyzed protein; the dosing ratio of surimi protein, deionized water, papain and aminopeptidase is 2g:80mL:5000U:5000U;

[0104] S3, polish, crush, sieve, dry and cool the cassava to obtain cassava starch;

[0105] S4, mix the cassava starch, alpha-amylase, starch glucosidase, citric acid-sodium phosphate buffer, and dehydrate ethanol, heat and stir at 55℃ for 4 h, stand for 3 h, centrifuge, wash the solid phase with water, dry to obtain material A; the dosing ratio of cassava starch, alpha-amylase, starch glucosidase, citric acid-sodium phosphate buffer and dehydrate ethanol is 15g:300U:3000U:60mL:500mL; the pH of the citric acid-sodium phosphate buffer is 5;

[0106] S5, taking the material A, silane coupling agent KH792, deionized water, adjusting pH to 5, stirring in 55℃ water bath for 8h, washing, vacuum drying at 50℃, 0.1MPa for 4h, to obtain material B; the mass ratio of the material A, silane coupling agent KH792, deionized water is 4:0.4:80;

[0107] S6, taking the material A, silane coupling agent KH792, deionized water, adjusting pH to 5, stirring in 55℃ water bath for 8h, washing, vacuum drying at 50℃, 0.1MPa for 4h, to obtain material B; the mass ratio of the material A, silane coupling agent KH792, deionized water is 4:0.4:80;

[0108] S7, taking the material B, deionized water, material C, adjusting pH to 6, ultrasonic dispersion for 20min, then adding surimi hydrolyzed protein, and then adding genipin solution, stirring at 35℃ for 3h, filtering, drying, to obtain the composite carrier; the amount ratio of the material B, deionized water, material C, surimi hydrolyzed protein, genipin solution is 2.5g:100mL:5g:2g:80mL;

[0109] The preparation of the genipin solution comprises the following steps:

[0110] Taking 25g genipin dissolved in 60mL anhydrous ethanol, stirring for 25min, adding 90mL ethyl acetate and 850mL n-hexane, stirring for 15min, to obtain the genipin solution;

[0111] S8, taking cassava leaves and giant reed, chopping, then mixing with the composite carrier, sodium lactate, yeast extract, diatomite, fish manure, external water source, sealing in a fermentation tank for fermentation, to obtain the anaerobic activated sludge; the mass ratio of the cassava leaves, giant reed, composite carrier, sodium lactate, yeast extract, diatomite, fish manure, external water source is 300g:350g:2kg:8g:10g:6kg:8kg:5kg; the fermentation refers to introducing nitrogen gas with a flow rate of 8L / min into the fermentation tank for 40min, completely discharging oxygen in the fermentation tank, and then fermenting at 38℃ for 4d.

[0112] The anoxic tank is filled with anoxic activated sludge, and the preparation of the anoxic activated sludge comprises the following steps: taking cassava leaves and giant reed, chopping, then mixing with the composite carrier, sodium lactate, yeast extract, diatomite, fish manure, external water source, placing in a fermentation tank for fermentation, to obtain the anoxic activated sludge; the mass ratio of the cassava leaves, giant reed, composite carrier, sodium lactate, yeast extract, diatomite, fish manure, external water source is 300g:350g:2kg:8g:600g:6kg:1.5kg:2kg; the fermentation refers to fermenting at 28℃, DO of 0.5mg / L for 4d.

[0113] The aerobic tank is filled with aerobic activated sludge, and the preparation of the aerobic activated sludge comprises the following steps: taking cassava leaves and giant reed, crushing them, and then mixing them with the composite carrier, sodium lactate, aerobic denitrifying bacteria, diatomite, fish manure, and external water source, and placing them in a fermentation tank for fermentation to obtain the aerobic activated sludge; the dosing ratio of the cassava leaves, giant reed, composite carrier, sodium lactate, aerobic denitrifying bacteria, diatomite, fish manure, and external water source is 300 g:350 g:2 kg:8 g:2.52*10 6 CFU:6 kg:1.2 kg:1 kg; the fermentation refers to fermentation under the condition of 28℃ and DO of 2.8 mg / L for 4 d.

[0114] The adsorption tank is a fixed bed adsorber, and the fixed bed adsorber is filled with an adsorbent, and the preparation of the adsorbent comprises the following steps:

[0115] A1, washing the bone frame after removing surimi in hot water at 100℃ for 40 min, drying, crushing, grinding, and passing through a 100-mesh screen to obtain bone powder;

[0116] A2, carbonizing the bone powder in a nitrogen atmosphere, soaking the carbonized bone powder in a potassium carbonate solution for 24 h, filtering, drying the solid phase, activating the dried bone powder in a nitrogen atmosphere, cooling, washing, filtering, and drying to obtain bone powder activated carbon;

[0117] The carbonization refers to pyrolysis at 500℃ for 2 h; the concentration of the potassium carbonate solution is 0.5 mol / L; the activation refers to activation at 700℃ for 2 h; and the mass ratio of the bone powder to the potassium carbonate solution is 12:40;

[0118] A3, mixing ferric chloride hexahydrate and deionized water, ultrasonic dispersion for 40 min, adding the bone powder activated carbon, heating in a water bath under sealed conditions at 90℃ for 3 h, washing, and drying to obtain the adsorbent; the mass ratio of the ferric chloride hexahydrate, deionized water, and bone powder activated carbon is 1.5:100:6.

[0119] Among them, 15 kg of anaerobic activated sludge is used to treat 1 ton of fish pond effluent for 40 h, 15 kg of anoxic activated sludge is used to treat 1 ton of fish pond effluent for 38 h, 15 kg of aerobic activated sludge is used to treat 1 ton of fish pond effluent for 38 h, and 20 kg of adsorbent is used to treat 1 ton of fish pond effluent, and the treatment results are shown in Table 1.

[0120] Comparative Example 1

[0121] The difference from Example 1 is that no fish surimi hydrolyzed protein is added in the preparation process of the composite carrier.

[0122] The 15 kg anaerobic activated sludge is treated for 40 h, the 15 kg anoxic activated sludge is treated for 38 h, the 15 kg aerobic activated sludge is treated for 38 h, and the 20 kg adsorbent is treated for each ton of fish pond tail water, and the treatment results are shown in Table 1.

[0123] Comparative Example 2

[0124] The difference from Comparative Example 1 is that no genipin solution is added in the preparation process of the composite carrier.

[0125] The 15 kg anaerobic activated sludge is treated for 40 h, the 15 kg anoxic activated sludge is treated for 38 h, the 15 kg aerobic activated sludge is treated for 38 h, and the 20 kg adsorbent is treated for each ton of fish pond tail water, and the treatment results are shown in Table 1.

[0126] Comparative Example 3

[0127] The difference from Example 1 is that no material B is added in the preparation process of the composite carrier.

[0128] The 15 kg anaerobic activated sludge is treated for 40 h, the 15 kg anoxic activated sludge is treated for 38 h, the 15 kg aerobic activated sludge is treated for 38 h, and the 20 kg adsorbent is treated for each ton of fish pond tail water, and the treatment results are shown in Table 1.

[0129] Comparative Example 4

[0130] The difference from Example 1 is that the ammoniation modification of the material A in step S5 is removed, that is, the material A is mixed with the material C.

[0131] The 15 kg anaerobic activated sludge is treated for 40 h, the 15 kg anoxic activated sludge is treated for 38 h, the 15 kg aerobic activated sludge is treated for 38 h, and the 20 kg adsorbent is treated for each ton of fish pond tail water, and the treatment results are shown in Table 1.

[0132] Comparative Example 5

[0133] The difference from Example 1 is that in step S8, the mass ratio of cassava leaves, giant reed, composite carrier, sodium lactate, yeast extract, diatomite, fish manure, and external water source is 0 g:450 g:1 kg:5 g:8 g:4 kg:6 kg:5 kg.

[0134] The 15 kg anaerobic activated sludge is treated for 40 h, the 15 kg anoxic activated sludge is treated for 38 h, the 15 kg aerobic activated sludge is treated for 38 h, and the 20 kg adsorbent is treated for each ton of fish pond tail water, and the treatment results are shown in Table 1.

[0135] Comparative Example 6

[0136] The difference from Example 1 is that in step S8, the mass ratio of cassava leaves, giant reed, composite carrier, sodium lactate, yeast extract, diatomite, fish manure, and external water source is 450g:0g:1kg:5g:8g:4kg:6kg:5kg.

[0137] The fish pond effluent is treated by 15kg anaerobic activated sludge for 40h, 15kg anoxic activated sludge for 38h, 15kg aerobic activated sludge for 38h, and 20kg adsorbent per ton of fish pond effluent, and the treatment results are shown in Table 1 below.

[0138] Comparative Example 7

[0139] The difference from Example 1 is that in the preparation process of the adsorbent, the fish bone frame is replaced by areca shell.

[0140] The fish pond effluent is treated by 15kg anaerobic activated sludge for 40h, 15kg anoxic activated sludge for 38h, 15kg aerobic activated sludge for 38h, and 20kg adsorbent per ton of fish pond effluent, and the treatment results are shown in Table 1 below.

[0141] Comparative Example 8

[0142] The difference from Example 1 is that in the preparation process of the adsorbent, it is not treated by step A3.

[0143] The fish pond effluent is treated by 15kg anaerobic activated sludge for 40h, 15kg anoxic activated sludge for 38h, 15kg aerobic activated sludge for 38h, and 20kg adsorbent per ton of fish pond effluent, and the treatment results are shown in Table 1 below.

[0144] Comparative Example 9

[0145] The difference from Example 1 is that the purification plants only include cassava.

[0146] The fish pond effluent is treated by 15kg anaerobic activated sludge for 40h, 15kg anoxic activated sludge for 38h, 15kg aerobic activated sludge for 38h, and 20kg adsorbent per ton of fish pond effluent, and the treatment results are shown in Table 1 below.

[0147] Comparative Example 10

[0148] The difference from Example 1 is that the purification plants only include giant reed.

[0149] The fish pond effluent is treated by 15kg anaerobic activated sludge for 40h, 15kg anoxic activated sludge for 38h, 15kg aerobic activated sludge for 38h, and 20kg adsorbent per ton of fish pond effluent, and the treatment results are shown in Table 1 below.

[0150] Table 1

[0151]

[0152]

[0153] The above merely describes the preferred embodiments of the present application, and is not intended to limit the present application in any form. Although the present application has been disclosed with the preferred embodiments as above, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content to obtain equivalent embodiments with equivalent changes, without departing from the technical solution of the present application. Any modification, change, equivalent change and modification of the above embodiments, which does not depart from the technical solution of the present application, and which is based on the technical essence of the present application, still belongs to the scope of the technical solution of the present application.

Claims

1. A construction method for treating effluent from a segmented fish pond using a river, characterized by, The method comprises the following steps: M1, setting a well-shaped river to divide the fishpond into several grid units, wherein two parallel sides of the well-shaped river form two main rivers connecting external water sources; the other two parallel sides of the well-shaped river are divided into several branch rivers by the two main rivers; and the breeding tail water in the grid units is collected into the main rivers through the branch rivers; M2, a steel overflow gate, a heavy pollutant sedimentation tank, a heavy pollutant adjusting tank and an integrated sewage treatment unit are arranged along the flow direction of the branch rivers in sequence; the integrated tail water treatment unit comprises a solid-liquid separator, an anaerobic tank, an anoxic tank, an aerobic tank, a disinfection tank and an adsorption tank arranged in sequence; the solid-liquid separator is used for separating solid particles in the breeding tail water; the anaerobic tank, the anoxic tank and the aerobic tank are used for degrading organic matters in the breeding tail water; the disinfection tank is used for disinfecting and sterilizing the breeding tail water; and the adsorption tank is used for adsorbing residual nitrogen and phosphorus substances in the breeding tail water; M3, a plurality of segmented multi-stage circulating sewage treatment units are arranged along the flow direction of the main rivers, and each of the segmented multi-stage circulating sewage treatment units comprises a main river sedimentation area and a main river aeration area arranged in sequence and connected in a circulating manner; the main river sedimentation area comprises a plurality of light pollutant sedimentation tanks connected in sequence according to the decreasing order of nitrogen and phosphorus concentrations in the breeding tail water; the light pollutant sedimentation tank is provided with a biological floating bed; and the main river aeration area is arranged at the intersection of the branch river and the main river, and is used for decomposing nitrogen and phosphorus substances in the breeding tail water; M4, purification plants are planted on both sides of the well-shaped river, and the purification plants comprise cassava and giant reed; Preparation of the anaerobic active sludge in the anaerobic tank comprises the following steps: S1, collecting dead fish produced in the fishpond breeding, scraping fish paste, homogenizing, mixing with deionized water, rinsing, heating and stirring, adjusting pH to 5-7, standing, centrifugal separation, and taking the precipitate to obtain fish paste protein; S2, mixing the fish paste protein and deionized water, adding papain and aminopeptidase, adjusting pH to 5.5-7.5, stirring at 50-60℃ for 20-30h, increasing the temperature to 90-95℃ and keeping for 15-20min, filtering, taking the liquid phase, heating and concentrating, and vacuum drying to obtain fish paste hydrolyzed protein; S3, polishing, crushing, sieving, screening, air-drying and cooling treatment are performed on the cassava to obtain cassava starch; S4, mixing the cassava starch, α-amylase, starch glucosidase and citric acid-sodium phosphate buffer, incubating and stirring at 50-55℃ for 3-4h, adding anhydrous ethanol, standing, centrifugal separation, washing the solid phase, and drying to obtain material A; S5, mixing the material A, silane coupling agent KH792 and deionized water, adjusting pH to 4-5, stirring in a water bath at 55℃ for 6-8h, washing, and vacuum drying to obtain material B; S6, mixing ferric chloride hexahydrate, trimesic acid and deionized water, ultrasonic dispersion, refluxing at 100℃ for 24h, centrifugal separation, and freeze-drying to obtain material C; S7, take the material B, deionized water, material C mixed, adjust pH to 5-6, ultrasonic dispersion 10-20 min, add surimi hydrolyzed protein, then add genipin solution, stirring at 25-35℃ for 2-3h, filter, dry, to get the composite carrier; S8, take cassava leaves, emperor bamboo grass chopped, then mixed with the composite carrier, sodium lactate, yeast extract, diatomite, fish manure, external water source, placed in fermentation tank fermentation, to get the anaerobic activated sludge.

2. The construction method for treating tail water of a fish pond by using a river segment according to claim 1, characterized in that, In step S2, the amount of surimi protein, deionized water, papain and aminopeptidase is 1-2g: 50-80mL: 5000U: 5000U.

3. The construction method for treating tail water of a fish pond by using a river segment according to claim 1, characterized in that, In step S4, the amount of cassava starch, alpha-amylase, starch glucosidase, citric acid-sodium phosphate buffer and anhydrous ethanol is 10-15g: 100-300U: 1500-3000U: 50-60mL: 500mL; the pH of the citric acid-sodium phosphate buffer is 5.

4. The construction method for treating the effluent of a fish pond by using a river creek according to claim 1, wherein, In step S5, the mass ratio of material A, silane coupling agent KH792 and deionized water is 3-4:0.2-0.4:60-80.

5. The construction method for treating the effluent of a fish pond by using a river creek according to claim 1, wherein, In step S6, the amount of ferric chloride hexahydrate, trimesic acid and deionized water is 4-6g: 4-4.5g: 100mL.

6. The construction method for treating the effluent of a fish pond by using a river creek according to claim 1, wherein, In step S7, the amount of material B, deionized water, material C, surimi hydrolyzed protein and genipin solution is 1.5-2.5g: 100mL: 4-5g: 1-2g: 80mL.

7. The construction method for treating the effluent of a fish pond by using a river creek according to claim 1, wherein, The anoxic tank is filled with anoxic activated sludge, and the preparation of the anoxic activated sludge includes the following steps: Take cassava leaves, emperor bamboo grass chopped, then mixed with the composite carrier, sodium lactate, yeast extract, diatomite, fish manure, external water source, placed in fermentation tank fermentation, to get the anoxic activated sludge.

8. The construction method for treating the effluent of a fish pond by using a river creek according to claim 1, wherein, The aerobic tank is filled with aerobic activated sludge, and the preparation of the aerobic activated sludge includes the following steps: Take cassava leaves, emperor bamboo grass chopped, then mixed with the composite carrier, sodium lactate, yeast extract, diatomite, fish manure, external water source, placed in fermentation tank fermentation, to get the anoxic activated sludge.

9. The construction method for treating the effluent of a fish pond by using a river creek according to claim 1, wherein, The adsorption tank is a fixed bed adsorber, which is filled with an adsorbent, and the preparation of the adsorbent includes the following steps: A1, the bone frame after removing surimi is washed in hot water at 80-100℃ for 30-40min, dried, crushed, ground, sieved, to get bone powder; A2, take the bone powder in a nitrogen atmosphere for carbonization, soak the carbonized bone powder in potassium carbonate solution, filter, take the solid phase dry, dry the bone powder in a nitrogen atmosphere for activation, cool, wash, filter, dry, to get bone powder activated carbon; The carbonization refers to pyrolysis at 450-500℃ for 1-2h; the activation refers to activation at 650-700℃ for 1-2h; the mass ratio of bone powder and potassium carbonate solution is 10-12:30-40; A3, take ferric chloride hexahydrate and deionized water, ultrasonic dispersion, add the bone powder activated carbon, water bath heating at 90℃ under sealed condition, wash, dry, to get the adsorbent; The mass ratio of the ferric chloride hexahydrate, deionized water and bone powder activated carbon is 1-1.5:100:5-6.

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