CN113620531A - Remediation and treatment method for black and odorous water body - Google Patents
Remediation and treatment method for black and odorous water body Download PDFInfo
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Abstract
The application relates to the technical field of black and odorous water body treatment, and particularly discloses a method for restoring and treating a black and odorous water body. The method for restoring and treating the black and odorous water body comprises the following steps: s1: and (3) environmental survey: investigating the surrounding environment and pollution source conditions of a treatment area; s2: and (3) pollution source treatment: intercepting and controlling a pollution source in a treatment area; s3: flocculating and precipitating; s4: ecological dredging: cleaning bottom mud in the treatment area; s5: biological treatment: putting suspended fillers in the treatment area, aerating and oxygenating the water body, and putting a water body repairing agent in the water body; s6: plant restoration: placing an ecological floating bed in the treatment area; s7: auxiliary treatment: periodically cleaning and supplying water to the water body of the treatment area, and periodically cleaning garbage in the water body; s8: and (5) treatment monitoring. The method for restoring and treating the black and odorous water body can be used for treating the black and odorous water body in cities, rural areas and the like, and has the advantage of remarkable treatment effect.
Description
Technical Field
The application relates to the technical field of black and odorous water body treatment, in particular to a method for restoring and treating a black and odorous water body.
Background
At present, along with the continuous development of cities, the scale, population and industry of the cities are continuously expanded, so that the urban water environment is continuously deteriorated, and the ecological environment is fragile year by year. Especially, the black and odorous water in the city not only affects the life of the masses and the appearance of the city, but also threatens the drinking water safety and physical condition of residents and greatly hinders the sustainable development of the city.
The black and odorous water body is caused by comprehensive reasons in the aspects of biology and chemistry, under the conditions of poor fluidity and serious organic pollution, the decomposition of organic matters in the water body can lead the oxygen content in the water to be lower and lower, and an anoxic state is caused, so that the reproduction of anaerobic organisms is caused, and a large amount of toxic and odorous substances such as hydrogen sulfide, ammonia and the like are generated in the degradation process of the organic matters in the anaerobic organisms. In addition, black substances such as ferrous sulfide, manganese sulfide and the like are generated, so that the water body is blacked and smelly.
In order to solve the above problems, chinese patent application publication No. CN107673558A discloses a method for purifying black and odorous water, comprising: adding alkali metal peroxide slow-release particles to the bottom of the water body in batches; adding biological enzyme preparation particles to the bottom of the water body; spraying the sulfureted bacteria composite preparation particles on the surface of a water body; uniformly dispersing and adding alkali metal peroxide instant particles to the surface of a water body in batches; putting high-efficiency degradation bacterial liquid into the water body, and installing aeration and oxygenation equipment on the surface or shallow layer of the water body for continuously reoxygenating the water body; and (3) putting fishes into the water body and/or planting aquatic plants near the bank of the water body for biological treatment.
Aiming at the black and odorous water body treatment method, the invention considers that the treatment period is longer and the treatment effect is poorer.
Disclosure of Invention
In order to promote the treatment effect to the black and odorous water body, the application provides a black and odorous water body's restoration treatment method.
A method for restoring and treating black and odorous water comprises the following steps:
s1: and (3) environmental survey: dividing water bodies in the treatment area into a plurality of treatment areas, detecting the water bodies in the treatment areas, and investigating the surrounding environment and pollution source conditions of the treatment areas;
s2: and (3) pollution source treatment: intercepting and controlling a pollution source in a treatment area;
s3: flocculation and precipitation: adding flocculating agent into the water body of the treatment area, wherein the adding amount is 75-100g/m3；
S4: ecological dredging: cleaning bottom mud in the treatment area;
s5: biological treatment: putting suspended fillers in the treatment area, and aerating and oxygenating the water body, wherein the adding proportion of the suspended fillers accounts for 30-50% of the volume of the water body; when the dissolved oxygen in the water is more than 2.5mg/L, the water restoration agent is put in the water, the water restoration agent is put in every 5-8 days, and the putting amount is 35-50g/m3The water body repairing agent is mainly prepared from the following raw materials in parts by weight: 35-55 parts of adsorbent, 20-30 parts of persulfate, 2-5 parts of quicklime and 7-12 parts of composite microbial inoculum; the adsorbent consists of calcium carbonate, bentonite and fly ash according to the mass ratio of (3-7) to (1.5-3) to (0.5-1.2), and the composite microbial agent consists of at least one of photosynthetic bacteria and bacillus subtilis, ammonifying bacteria, nitrifying bacteria and denitrifying bacteria according to the mass ratio of (5-7) to (3-5) to (2-3.5) to (1.5-2.6);
s6: plant restoration: placing an ecological floating bed in the treatment area, and planting aquatic plants on the ecological floating bed, wherein the area of the ecological floating bed accounts for 20-35% of the area of the treatment area;
s7: auxiliary treatment: periodically cleaning and supplying water to the water body of the treatment area, and periodically cleaning garbage in the water body;
s8: treatment and monitoring: and monitoring and recording the water body treatment condition in the treatment area regularly.
By adopting the technical scheme, the hydrological environment, the water body state and the pollution source condition of the treatment area are firstly investigated, then the flow intercepting source is carried out on the pollution source according to the related investigation result, the entering of external source pollutants is controlled, and the pollutant source of the black and odorous water body is lightened from the source. Then, flocculating settling is carried out on the water body in the treatment area, solid pollutants in the water body are rapidly removed, flocculated harmful substances in the water body and pollutants in the original bottom sediment are removed through bottom sediment desilting, and the content of harmful solid pollutants in the treatment area is rapidly reduced. In addition, aeration and oxygenation are carried out in the water body to create an aerobic environment, under the action of the water body restoration agent, the adsorbent adsorbs harmful substances in the water body to form an adsorption type colloid, bacterial colonies in the composite microbial inoculum are rapidly propagated in the colloid, a better aerobic decomposition environment is maintained under the cooperation of persulfate, the degradation speed of organic pollutants in the water body is greatly accelerated, and a good purification function is achieved. And the bacterial colony in the composite microbial inoculum can also be rapidly propagated in the suspended filler, can form long-acting degradation in the water body, reduce the probability of water quality repetition, ensure the durability of the water body improvement effect under the cooperation of the ecological floating bed and the aquatic plants, and maintain better treatment effect.
Preferably, the composite microbial inoculum consists of photosynthetic bacteria, bacillus subtilis, ammonifying bacteria, nitrifying bacteria and denitrifying bacteria according to the mass ratio of (1.5-2): (3.5-5): (3-5): (2-3.5): (1.5-2.6).
By adopting the technical scheme, the composition and the proportion of the composite microbial inoculum are optimized and adjusted, so that a better colony group for degrading can be formed, the degradation speed of organic pollutants in a water body is increased, and the treatment period is shortened.
Preferably, the mass ratio of the complex microbial inoculum to the persulfate is (0.35-0.4): 1.
By adopting the technical scheme, the mass ratio of the composite microbial inoculum to the persulfate is adjusted, so that the degradation of the in-situ chemical oxidant and the biodegradation are cooperated, the degradation speed of pollutants is accelerated, and the growth and the propagation of the composite microbial community are not influenced.
Preferably, the suspended filler is nylon elastic suspended filler.
By adopting the technical scheme, the nylon elastic suspension filler has a larger specific surface area and a larger contact area with a water body, so that the contact range of the composite flora and organic pollutants in the water body is wider, and the degradation speed of the composite flora on the organic pollutants is further improved.
Preferably, the surface of the nylon elastic suspended filler is grafted with paraazidobenzoic acid.
By adopting the technical scheme, after the surface of the nylon elastic suspended filler is grafted with the para-azidobenzoic acid, the hydrophilicity of the nylon elastic suspended filler and the adsorption capacity of organic pollutants in a water body are improved, so that the propagation and growth of the composite flora on the nylon elastic suspended filler are more stable, and the degradation speed of the organic pollutants is improved.
Preferably, the flocculant is mainly prepared from the following raw materials in parts by weight: 50-80 parts of polyacrylamide, 15-30 parts of zeolite, 10-18 parts of activated carbon, 3-5 parts of diatomite and 5-7 parts of chitosan.
By adopting the technical scheme, the polyacrylamide, the chitosan and the diatomite form a gel system in the water body, solid harmful particles and other pollutants in the water body are adsorbed on the bridge frame, so that the repulsion among the particles is reduced, and the particles collide with each other and are precipitated. And zeolite and active carbon absorb the agglomerated large aggregate, so that the content of pollutants in the water body is rapidly reduced, and the transparency of the water body is improved.
Preferably, in step S5, the activated sludge is periodically added in an amount of (2-5) kg/m3。
By adopting the technical scheme, the activated sludge is diffused in the water body to form suspension, so that a breeding place is promoted for the composite flora, the organic pollutants are degraded and consumed by the nylon elastic suspension filler, and the treatment effect and speed of the water body are further improved.
Preferably, in step S4, the bottom sediment is cleaned after the flocculating agent is thrown in the water body for 48-72 h.
By adopting the technical scheme, harmful solid particles in the water body are fully settled and separated, and a better environment is provided for the propagation and growth of the composite flora.
Preferably, in step S6, the aquatic plants are selected from swamp morningglory, cattail pollen and hay according to the plant number ratio of (5-10) to (2-4) to (1-3).
By adopting the technical scheme, the water spinach, the cattail and the hay can rapidly absorb organic pollutants in the water body, reduce the content of total nitrogen and total phosphorus in the water body, adsorb harmful heavy metals, inhibit the propagation and diffusion of harmful algae, and cooperate with the compound flora to rapidly degrade the water body, so that the treatment effect is better.
In summary, the present application has the following beneficial effects:
1. as the treatment mode combining pollution source flow control, flocculation sedimentation, water body restoration and suspended filler is adopted, the content of organic pollutants in water is quickly reduced, the BOD content is reduced by more than 90 percent, the total nitrogen is less than 2.5mg/L, and the sulfide content is also reduced to 4.5 mg/L.
2. Preferentially adopt among this application to azido benzoic acid modified nylon elastic suspension filler, promote the degradation effect to organic pollutant in the water greatly to combine the absorption of aquatic plant, further improved the treatment effect to black and odorous water, make BOD content in the water reduce to more than 2.6mg/L, total nitrogen is less than 0.38mg/L, sulphide content also reduces to 0.9 mg/L.
Detailed Description
The present application will be described in further detail with reference to examples.
In the method for restoring and treating the black and odorous water body, in step S4, the step of cleaning bottom mud in the treatment area is to clean surface layer bottom mud with the depth of 15-30cm in the treatment area.
Preferably, in the raw materials of the water body repairing agent, the calcium carbonate is heavy calcium carbonate and light calcium carbonate according to the mass ratio of 2.5: 1.
Preferably, the bentonite is nano bentonite, the fineness is less than 76 mu m, and the loss on ignition is 32-35%.
Preferably, the fly ash is a first grade fly ash.
Preferably, the persulfate is composed of ammonium persulfate, sodium persulfate and potassium hydrogen persulfate according to the mass ratio of 0.8:3: 1.5.
Preferably, the composite microbial inoculum consists of at least one of photosynthetic bacteria and bacillus subtilis, ammonifying bacteria, nitrifying bacteria and denitrifying bacteria in a mass ratio of (5-7) to (3-5) to (2-3.5) to (1.5-2.6). Further preferably, when the composite microbial inoculum is compounded by photosynthetic bacteria and bacillus subtilis together with the ammonifying bacteria, the nitrifying bacteria and the denitrifying bacteria, the composite microbial inoculum is compounded by the mass sum of the photosynthetic bacteria and the bacillus subtilis and the ammonifying bacteria, the nitrifying bacteria and the denitrifying bacteria.
Preferably, the suspended filler is nylon elastic suspended filler. More preferably, the nylon elastic suspended filler is nylon 6 suspended filler, the average length is 15cm, the diameter is 20cm, and the length of the hanging rope is 100 cm.
The application provides a nylon elastic suspended filler surface grafting modification method, which comprises the following steps: 1) treating the nylon elastic suspension filler in a 15% dimethyl sulfoxide solution for 15min, and then irradiating the nylon elastic suspension filler for 1min by electron beams for standby, wherein the irradiation dose is 20 kGy;
2) dissolving p-azidobenzoic acid in dichloromethane to prepare a treatment solution, then immersing the nylon elastic suspended filler subjected to ultraviolet irradiation in the step 1) into the treatment solution, adding a small amount of potassium persulfate, and then treating for 20min under continuous oscillation to obtain the nylon elastic suspended filler.
Wherein, the grafting rate of the para-azidobenzoic acid on the nylon elastic suspension filler is 15 percent.
The information on the main raw materials of the examples and comparative examples of the present application is shown in table 1.
TABLE 1 information on main raw materials of examples and comparative examples of the present application
| Raw materials | Specification and model | Source manufacturer |
| Fly ash | First stage | Lingshou county mineral processing factory |
| Bentonite clay | YH-938 | Zhejiang Yuhong New Material Co.,Ltd. |
| Para-azidobenzoic acid | CAS No.6427-66-3 | SHANGHAI MACKLIN BIOCHEMICAL Co.,Ltd. |
| Dimethyl sulfoxide | Industrial grade | Cangzhou Dongli Fine chemical Co., Ltd |
Examples
Example 1
The method for restoring and treating the black and odorous water body comprises the following steps:
s1: and (3) environmental survey: dividing the water body in the treatment area into a plurality of treatment areas, detecting the water body in each treatment area, detecting COD, BOD, dissolved oxygen and heavy metal content, and grading each treatment area according to the detection result; in addition, the hydrological environment and the pollution source conditions around the treatment area are investigated, and point source pollution, surface source pollution and endogenous pollution are checked;
s2: and (3) pollution source treatment: intercepting and controlling point source and surface source pollution sources in a treatment area, controlling the sources of the sewage straight discharge port and controlling the entry of foreign pollutants;
s3: flocculation and precipitation: selecting sunny breeze weather, and uniformly adding flocculating agent in the water body of the treatment area with the adding amount of 75g/m3；
S4: ecological dredging: after flocculating agent is put in for 32 hours, bottom mud in the treatment area is cleaned, the cleaning depth of the bottom mud is 15cm, flocculating agent is put in again after the bottom mud is cleaned, and the putting amount is 15g/m3；
S5: biological treatment: putting polyurethane sponge suspension filler in the treatment area, wherein the adding proportion of the polyurethane suspension filler is 30 percent of the volume of the water body, aerating the water body in the treatment area by adopting an aerator, adding the water body repairing agent when the dissolved oxygen in the water body is more than 2.5mg/L, and putting the repairing agent once every 5 days, wherein the adding amount is 35g/m3；
S6: plant restoration: placing an ecological floating bed in the treatment area, and planting the iris on the ecological floating bed, wherein the area of the ecological floating bed accounts for 20% of the area of the treatment area;
s7: auxiliary treatment: supplying clear water to the water body of the treatment area every two weeks, wherein the supply amount is 15 percent of the total amount of the water body, and cleaning garbage such as fallen leaves, plastics and the like in the water body every week to keep the water surface clean and free of floating objects;
s8: treatment and monitoring: monitoring the treatment condition of the water body in the treatment area every 3d, detecting indexes such as COD, chroma, BOD, dissolved oxygen and the like, and recording related detection data in a book.
Wherein the flocculating agent is polyaluminium chloride.
The water body restoration agent is prepared from the following raw materials in parts by weight: 35kg of adsorbent, 20kg of persulfate, 2kg of quicklime and 7kg of composite microbial inoculum; the adsorbent consists of calcium carbonate, bentonite and fly ash according to a mass ratio of 3:1.5:0.5, and the composite microbial agent consists of photosynthetic bacteria, ammonifying bacteria, nitrifying bacteria and denitrifying bacteria according to a mass ratio of 5:3:2: 1.5.
Wherein the calcium carbonate is composed of heavy calcium carbonate and light calcium carbonate according to the mass ratio of 2.5: 1. The fly ash is first-grade fly ash. The persulfate is composed of ammonium persulfate, sodium persulfate and potassium hydrogen persulfate according to the mass ratio of 0.8:3: 1.5. The bentonite is nano bentonite, the fineness is less than 76 mu m, and the loss on ignition is 32-35%.
Example 2
The method for restoring and treating the black and odorous water body comprises the following steps:
s1: and (3) environmental survey: dividing the water body in the treatment area into a plurality of treatment areas, detecting the water body in each treatment area, detecting COD, BOD, dissolved oxygen and heavy metal content, and grading each treatment area according to the detection result; in addition, the hydrological environment and the pollution source conditions around the treatment area are investigated, and point source pollution, surface source pollution and endogenous pollution are checked;
s2: and (3) pollution source treatment: intercepting and controlling point source and surface source pollution sources in a treatment area, controlling the sources of the sewage straight discharge port and controlling the entry of foreign pollutants;
s3: flocculation and precipitation: selecting sunny breeze weather, and uniformly adding flocculating agent in the water body of the treatment area with the adding amount of 90g/m3；
S4: ecological dredging: after flocculating agent is put in for 32 hours, bottom mud in the treatment area is cleaned, the cleaning depth of the bottom mud is 25cm, flocculating agent is put in again after the bottom mud is cleaned, and the putting amount is 15g/m3；
S5: biological treatment: putting polyurethane sponge suspension filler in the treatment area, wherein the adding proportion of the polyurethane suspension filler is 40 percent of the volume of the water body, aerating the water body in the treatment area by adopting an aerator, adding the water body repairing agent when the dissolved oxygen in the water body is more than 2.5mg/L, and putting the water body repairing agent once every 7 days, wherein the adding amount is 40g/m3；
S6: plant restoration: placing an ecological floating bed in the treatment area, and planting the iris on the ecological floating bed, wherein the area of the ecological floating bed accounts for 28% of the area of the treatment area;
s7: auxiliary treatment: supplying clear water to the water body of the treatment area every two weeks, wherein the supply amount is 15 percent of the total amount of the water body, and cleaning garbage such as fallen leaves, plastics and the like in the water body every week to keep the water surface clean and free of floating objects;
s8: treatment and monitoring: monitoring the treatment condition of the water body in the treatment area every 3d, detecting indexes such as COD, chroma, BOD, dissolved oxygen and the like, and recording related detection data in a book.
Wherein the flocculating agent is polyaluminium chloride.
The water body restoration agent is prepared from the following raw materials in parts by weight: 35kg of adsorbent, 20kg of persulfate, 2kg of quicklime and 7kg of composite microbial inoculum; the adsorbent consists of calcium carbonate, bentonite and fly ash according to a mass ratio of 3:1.5:0.5, and the composite microbial agent consists of photosynthetic bacteria, ammonifying bacteria, nitrifying bacteria and denitrifying bacteria according to a mass ratio of 5:3:2: 1.5.
Wherein the calcium carbonate is composed of heavy calcium carbonate and light calcium carbonate according to the mass ratio of 2.5: 1. The fly ash is first-grade fly ash. The persulfate is composed of ammonium persulfate, sodium persulfate and potassium hydrogen persulfate according to the mass ratio of 0.8:3: 1.5. The bentonite is nano bentonite, the fineness is less than 76 mu m, and the loss on ignition is 32-35%.
Example 3
The method for restoring and treating the black and odorous water body comprises the following steps:
s1: and (3) environmental survey: dividing the water body in the treatment area into a plurality of treatment areas, detecting the water body in each treatment area, detecting COD, BOD, dissolved oxygen and heavy metal content, and grading each treatment area according to the detection result; in addition, the hydrological environment and the pollution source conditions around the treatment area are investigated, and point source pollution, surface source pollution and endogenous pollution are checked;
s2: and (3) pollution source treatment: intercepting and controlling point source and surface source pollution sources in a treatment area, controlling the sources of the sewage straight discharge port and controlling the entry of foreign pollutants;
s3: flocculation and precipitation: selecting sunny breeze weather, and uniformly adding flocculating agent in the water body of the treatment area with the adding amount of 100g/m3；
S4: ecological dredging: after flocculating agent is put in for 32 hours, bottom mud in the treatment area is cleaned, the cleaning depth of the bottom mud is 30cm, flocculating agent is put in again after the bottom mud is cleaned, and the putting amount is 15g/m3；
S5: biological treatment: polyurethane placement in a treatment areaAdding sponge suspended filler and polyurethane suspended filler in a proportion of 50% of the volume of the water body, aerating and oxygenating the water body in a treatment area by adopting an aerator, adding the water body repairing agent when the dissolved oxygen in the water body is more than 2.5mg/L, and adding the repairing agent once every 8d, wherein the adding amount is 50g/m3；
S6: plant restoration: placing an ecological floating bed in the treatment area, and planting the iris on the ecological floating bed, wherein the area of the ecological floating bed accounts for 28% of the area of the treatment area;
s7: auxiliary treatment: supplying clear water to the water body of the treatment area every two weeks, wherein the supply amount is 15 percent of the total amount of the water body, and cleaning garbage such as fallen leaves, plastics and the like in the water body every week to keep the water surface clean and free of floating objects;
s8: treatment and monitoring: monitoring the treatment condition of the water body in the treatment area every 3d, detecting indexes such as COD, chroma, BOD, dissolved oxygen and the like, and recording related detection data in a book.
Wherein the flocculating agent is polyaluminium chloride.
The water body restoration agent is prepared from the following raw materials in parts by weight: 35kg of adsorbent, 20kg of persulfate, 2kg of quicklime and 7kg of composite microbial inoculum; the adsorbent consists of calcium carbonate, bentonite and fly ash according to a mass ratio of 3:1.5:0.5, and the composite microbial agent consists of photosynthetic bacteria, ammonifying bacteria, nitrifying bacteria and denitrifying bacteria according to a mass ratio of 5:3:2: 1.5.
Wherein the calcium carbonate is composed of heavy calcium carbonate and light calcium carbonate according to the mass ratio of 2.5: 1. The fly ash is first-grade fly ash. The persulfate is composed of ammonium persulfate, sodium persulfate and potassium hydrogen persulfate according to the mass ratio of 0.8:3: 1.5. The bentonite is nano bentonite, the fineness is less than 76 mu m, and the loss on ignition is 32-35%.
Examples 4 to 6
The method for restoring and treating a black and odorous water body according to embodiments 4 to 6 is different from embodiment 2 in that: the water body restoration agent is prepared from the following raw materials: adsorbent, persulfate, quicklime and composite microbial inoculum; the adsorbent consists of calcium carbonate, bentonite and fly ash according to the mass ratio of 3:1.5:0.5, the composite microbial agent consists of bacillus subtilis, ammonifying bacteria, nitrifying bacteria and denitrifying bacteria according to the mass ratio of 5:3:2:1.5, and the rest is the same as that in the embodiment 2.
Wherein the calcium carbonate is composed of heavy calcium carbonate and light calcium carbonate according to the mass ratio of 2.5: 1. The fly ash is first-grade fly ash. The persulfate is composed of ammonium persulfate, sodium persulfate and potassium hydrogen persulfate according to the mass ratio of 0.8:3: 1.5. The bentonite is nano bentonite, the fineness is less than 76 mu m, and the loss on ignition is 32-35%.
The amounts of the respective raw materials of the aqueous repair agents in examples 4 to 6 added are shown in Table 2.
TABLE 2 addition of the respective starting materials of examples 4 to 6
| Raw materials (kg) | Example 4 | Example 5 | Example 6 |
| Adsorbent and process for producing the same | 35 | 42 | 55 |
| Persulfates | 20 | 25 | 30 |
| Quick lime | 2 | 3.5 | 5 |
| Complex microbial inoculum | 7 | 9 | 12 |
Example 7
The method for restoring and treating a black and odorous water body of the embodiment is different from the method of the embodiment 5 in that: in the raw materials of the water body repairing agent, the adsorbent consists of calcium carbonate, bentonite and fly ash according to the mass ratio of 5.5:2:0.9, the composite microbial agent consists of photosynthetic bacteria, ammonifying bacteria, nitrifying bacteria and denitrifying bacteria according to the mass ratio of 5:3:2:1.5, and the rest is the same as that in the embodiment 5.
Example 8
The method for restoring and treating a black and odorous water body of the embodiment is different from the method of the embodiment 5 in that: in the raw materials of the water body repairing agent, the adsorbent consists of calcium carbonate, bentonite and fly ash according to the mass ratio of 7:3:1.2, the composite microbial agent consists of photosynthetic bacteria, ammonifying bacteria, nitrifying bacteria and denitrifying bacteria according to the mass ratio of 5:3:2:1.5, and the rest is the same as that in the embodiment 5.
Example 9
The method for restoring and treating a black and odorous water body of the embodiment is different from the method of embodiment 7 in that: in the raw materials of the water body repairing agent, the adsorbent consists of calcium carbonate, bentonite and fly ash according to the mass ratio of 5.5:2:0.9, the composite microbial agent consists of photosynthetic bacteria, ammonifying bacteria, nitrifying bacteria and denitrifying bacteria according to the mass ratio of 6.5:4:2.8:2.2, and the rest is the same as that in the embodiment 7.
Example 10
The method for restoring and treating a black and odorous water body of the embodiment is different from the method of embodiment 7 in that: in the raw materials of the water body repairing agent, the adsorbent consists of calcium carbonate, bentonite and fly ash according to the mass ratio of 5.5:2:0.9, the composite microbial agent consists of photosynthetic bacteria, ammonifying bacteria, nitrifying bacteria and denitrifying bacteria according to the mass ratio of 7:5:3.5:2.6, and the rest is the same as that in the embodiment 7.
Example 11
The method for restoring and treating a black and odorous water body of the embodiment is different from the method of the embodiment 9 in that: in the raw materials of the water restoration agent, the composite microbial agent is composed of photosynthetic bacteria, bacillus subtilis, ammonifying bacteria, nitrifying bacteria and denitrifying bacteria according to the mass ratio of 1.5:3.5:4:3.5:2.6, and the rest is the same as that in the embodiment 9.
Example 12
The method for restoring and treating a black and odorous water body of the embodiment is different from the method of the embodiment 9 in that: in the raw materials of the water restoration agent, the composite microbial agent is composed of photosynthetic bacteria, bacillus subtilis, ammonifying bacteria, nitrobacteria and denitrifying bacteria according to the mass ratio of 1.8:4.3:4:3.5:2.6, and the rest is the same as that in the embodiment 9.
Example 13
The method for restoring and treating a black and odorous water body of the embodiment is different from the method of the embodiment 9 in that: in the raw materials of the water restoration agent, the composite microbial agent is composed of photosynthetic bacteria, bacillus subtilis, ammonifying bacteria, nitrobacteria and denitrifying bacteria according to the mass ratio of 1.8:4.3:4:3.5:2.6, and the rest is the same as that in the embodiment 9.
Example 14
The method for restoring and treating a black and odorous water body of the present embodiment is different from embodiment 12 in that: in step S5, a nylon elastic suspension packing was placed in the treatment area, and the rest was the same as in example 12.
Wherein the nylon elastic suspension filler is nylon 6 elastic suspension filler, the average length is 15cm, the diameter is 20cm, and the length of the hanging rope is 100 cm.
Example 15
The method for remediating and remediating a black and odorous water body in the embodiment is different from the method in embodiment 14 in that: in step S5, a nylon elastic suspension filler is put into the treatment area, the surface of the nylon elastic suspension filler is grafted with p-azidobenzoic acid, the grafting ratio of the p-azidobenzoic acid on the nylon elastic suspension filler is 15%, and the rest is the same as that in example 14.
The surface grafting modification method of the nylon elastic suspended filler comprises the following steps:
1) treating the nylon elastic suspension filler in a 15% dimethyl sulfoxide solution for 15min, and then irradiating the nylon elastic suspension filler for 1min by electron beams for standby, wherein the irradiation dose is 20 kGy;
2) dissolving p-azidobenzoic acid in dichloromethane to prepare a treatment solution, then immersing the nylon elastic suspended filler subjected to ultraviolet irradiation in the step 1) into the treatment solution, adding a small amount of potassium persulfate, and then treating for 20min under continuous oscillation to obtain the nylon elastic suspended filler.
Example 16
The method for restoring and treating a black and odorous water body of the embodiment is different from the method of the embodiment 15 in that: in step S3, the flocculant is made from the following raw materials by weight: 50kg of polyacrylamide, 15kg of zeolite, 10kg of activated carbon, 3kg of diatomaceous earth and 5kg of chitosan, and the rest was the same as in example 15.
The surface grafting modification method of the nylon elastic suspended filler in the embodiment is the same as that of the embodiment 15.
Example 17
The method for restoring and treating a black and odorous water body of the embodiment is different from the method of the embodiment 15 in that: in step S3, the flocculant is made from the following raw materials by weight: 65kg of polyacrylamide, 22kg of zeolite, 15kg of activated carbon, 4.2kg of diatomaceous earth and 6kg of chitosan, and the rest was the same as in example 15.
The surface grafting modification method of the nylon elastic suspended filler in the embodiment is the same as that of the embodiment 15.
Example 18
The method for restoring and treating a black and odorous water body of the embodiment is different from the method of the embodiment 15 in that: in step S3, the flocculant is made from the following raw materials by weight: 80kg of polyacrylamide, 30kg of zeolite, 18kg of activated carbon, 5kg of diatomaceous earth and 7kg of chitosan, and the rest was the same as in example 15.
The surface grafting modification method of the nylon elastic suspended filler in the embodiment is the same as that of the embodiment 15.
Example 19
The method for restoring and treating a black and odorous water body of the embodiment is different from the method of the embodiment 17 in that: in step S4, the bottom sludge was cleaned after the flocculant was added to the water for 48 hours, and the rest was the same as in example 17.
The surface grafting modification method of the nylon elastic suspended filler in the embodiment is the same as that of the embodiment 17.
Example 20
The method for restoring and treating a black and odorous water body of the embodiment is different from the method of the embodiment 17 in that: in step S4, the bottom sediment was cleaned after the flocculant was added to the water for 56 hours, and the rest was the same as in example 17.
The surface grafting modification method of the nylon elastic suspended filler in the embodiment is the same as that of the embodiment 17.
Example 21
The method for restoring and treating a black and odorous water body of the embodiment is different from the method of the embodiment 17 in that: in step S4, the bottom sediment was cleaned after adding the flocculant for 72 hours in the water body, and the rest was the same as in example 17.
The surface grafting modification method of the nylon elastic suspended filler in the embodiment is the same as that of the embodiment 17.
Example 22
The method for restoring and treating a black and odorous water body of the embodiment is different from the method of the embodiment 20 in that: in step S6, the aquatic plants were swamp morningglory, cattail, and hay in a plant number ratio of 8:3:2, and the rest was the same as in example 20.
The surface grafting modification method of the nylon elastic suspended filler in the embodiment is the same as that of the embodiment 20.
Comparative example
Comparative example
The method for repairing and treating the black and odorous water body comprises the following steps:
s1: and (3) environmental survey: dividing the water body in the treatment area into a plurality of treatment areas, detecting the water body in each treatment area, detecting COD, BOD, dissolved oxygen and heavy metal content, and grading each treatment area according to the detection result; in addition, the hydrological environment and the pollution source conditions around the treatment area are investigated, and point source pollution, surface source pollution and endogenous pollution are checked;
s2: and (3) pollution source treatment: intercepting and controlling point source and surface source pollution sources in a treatment area, controlling the sources of the sewage straight discharge port and controlling the entry of foreign pollutants;
s3: flocculation and precipitation: selecting sunny breeze weather, and uniformly adding flocculating agent in the water body of the treatment area with the adding amount of 75g/m3；
S4: ecological environmentDredging: after flocculating agent is put in for 32 hours, bottom mud in the treatment area is cleaned, the cleaning depth of the bottom mud is 15cm, flocculating agent is put in again after the bottom mud is cleaned, and the putting amount is 15g/m3；
S5: biological treatment: putting polyurethane sponge suspension filler in the treatment area, wherein the adding proportion of the polyurethane suspension filler is 30 percent of the volume of the water body, aerating the water body in the treatment area by adopting an aerator, adding the water body repairing agent when the dissolved oxygen in the water body is more than 2.5mg/L, and putting the repairing agent once every 5 days, wherein the adding amount is 35g/m3；
S6: plant restoration: placing an ecological floating bed in the treatment area, and planting the iris on the ecological floating bed, wherein the area of the ecological floating bed accounts for 20% of the area of the treatment area;
s7: auxiliary treatment: supplying clear water to the water body of the treatment area every two weeks, wherein the supply amount is 15 percent of the total amount of the water body, and cleaning garbage such as fallen leaves, plastics and the like in the water body every week to keep the water surface clean and free of floating objects;
s8: treatment and monitoring: monitoring the treatment condition of the water body in the treatment area every 3d, detecting indexes such as COD, chroma, BOD, dissolved oxygen and the like, and recording related detection data in a book.
Wherein the flocculating agent is polyaluminium chloride.
The water body restoration agent is prepared from the following raw materials in parts by weight: 35kg of adsorbent, 2kg of quicklime and 7kg of composite microbial inoculum; the adsorbent is calcium carbonate, and the composite microbial inoculum consists of nitrobacteria and denitrifying bacteria in a mass ratio of 2: 1.5.
Wherein the calcium carbonate is composed of heavy calcium carbonate and light calcium carbonate according to the mass ratio of 2.5: 1.
Performance test
Detection method
The water body is treated according to the method for restoring and treating the black and odorous water body in the examples 1 to 22 and the comparative example, the treatment period is 180d, the physicochemical parameters of BOD, ammonia nitrogen and sulfide are measured on the treated water body, and the test results are shown in Table 3.
TABLE 3 results of determining physicochemical parameters after treatment in regional waters of examples 1 to 22 and comparative examples
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (9)
1. A method for restoring and treating black and odorous water is characterized by comprising the following steps: the method comprises the following steps:
s1: and (3) environmental survey: dividing water bodies in the treatment area into a plurality of treatment areas, detecting the water bodies in the treatment areas, and investigating the surrounding environment and pollution source conditions of the treatment areas;
s2: and (3) pollution source treatment: intercepting and controlling a pollution source in a treatment area;
s3: flocculation and precipitation: throwing a flocculating agent into the water body of the treatment area, wherein the throwing amount is 75-100g/m for carrying out the high speed cultivation;
s4: ecological dredging: cleaning bottom mud in the treatment area;
s5: biological treatment: putting suspended fillers in the treatment area, and aerating and oxygenating the water body, wherein the adding proportion of the suspended fillers accounts for 30-50% of the volume of the water body; when the dissolved oxygen in the water is more than 2.5mg/L, putting the water restoration agent once every 5-8d, wherein the putting amount is 35-50g/m for carrying out thin film planting, and the water restoration agent is mainly prepared from the following raw materials in parts by weight: 35-55 parts of adsorbent, 20-30 parts of persulfate, 2-5 parts of quicklime and 7-12 parts of composite microbial inoculum; the adsorbent consists of calcium carbonate, bentonite and fly ash according to the mass ratio of (3-7) to (1.5-3) to (0.5-1.2), and the composite microbial agent consists of at least one of photosynthetic bacteria and bacillus subtilis, ammonifying bacteria, nitrifying bacteria and denitrifying bacteria according to the mass ratio of (5-7) to (3-5) to (2-3.5) to (1.5-2.6);
s6: plant restoration: placing an ecological floating bed in the treatment area, and planting aquatic plants on the ecological floating bed, wherein the area of the ecological floating bed accounts for 20-35% of the area of the treatment area;
s7: auxiliary treatment: periodically cleaning and supplying water to the water body of the treatment area, and periodically cleaning garbage in the water body;
s8: treatment and monitoring: and monitoring and recording the water body treatment condition in the treatment area regularly.
2. The method for remediating a black and odorous water body according to claim 1, wherein: the composite microbial inoculum consists of photosynthetic bacteria, bacillus subtilis, ammonifying bacteria, nitrobacteria and denitrifying bacteria according to the mass ratio of (1.5-2): (3.5-5): (3-5): (2-3.5): (1.5-2.6).
3. The method for remediating a black and odorous water body according to claim 2, wherein: the mass ratio of the composite microbial inoculum to the persulfate is (0.35-0.4): 1.
4. The method for remediating a black and odorous water body according to claim 3, wherein: the suspension filler is nylon elastic suspension filler.
5. The method for remediating a black and odorous water body according to claim 4, wherein: the surface of the nylon elastic suspension filler is grafted with para-azidobenzoic acid.
6. The method for remediating a black and odorous water body according to claim 1, wherein: the flocculant is mainly prepared from the following raw materials in parts by weight: 50-80 parts of polyacrylamide, 15-30 parts of zeolite, 10-18 parts of activated carbon, 3-5 parts of diatomite and 5-7 parts of chitosan.
7. The method for remediating a black and odorous water body according to claim 1, wherein: in the step S5, activated sludge is periodically put in, and the putting amount of the activated sludge is (2-5) kg/m for cultivation.
8. The method for remediating a black and odorous water body according to claim 7, wherein: and in the step S4, the bottom mud is cleaned after flocculating agents are thrown in the water body for 48-72 hours.
9. The method for remediating a black and odorous water body according to claim 8, wherein: in the step S6, the aquatic plants are water spinach, cattail pollen and hay according to the plant number ratio of (5-10) to (2-4) to (1-3).
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