CN114835265A - Treatment method of high ammonia nitrogen wastewater - Google Patents

Treatment method of high ammonia nitrogen wastewater Download PDF

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CN114835265A
CN114835265A CN202210432505.XA CN202210432505A CN114835265A CN 114835265 A CN114835265 A CN 114835265A CN 202210432505 A CN202210432505 A CN 202210432505A CN 114835265 A CN114835265 A CN 114835265A
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ammonia nitrogen
bacillus
nitrogen wastewater
high ammonia
biological filler
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CN114835265B (en
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舒孝喜
温捷
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Beijing Selfway Environmental Engineering Technology Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
    • C02F3/348—Biological treatment of water, waste water, or sewage characterised by the microorganisms used characterised by the way or the form in which the microorganisms are added or dosed
    • C—CHEMISTRY; METALLURGY
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    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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    • Y02W10/10—Biological treatment of water, waste water, or sewage

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Abstract

The invention provides a method for treating high ammonia nitrogen wastewater, which comprises the following steps: filling the composite biological filler in an aerobic device, and adding the activated and domesticated composite microbial strains in the aerobic device filled with the composite biological filler; decomposing ammonia nitrogen in the pretreated high ammonia nitrogen wastewater by the activated and domesticated compound microorganism strains on the compound biological filler. The invention solves the technical problem of converting and removing ammonia nitrogen in the high ammonia nitrogen wastewater under the conditions of low cost and no secondary pollution or solid waste, and provides a biological treatment way for the treatment of the high ammonia nitrogen wastewater; the ammonia nitrogen concentration tolerance of the biological treatment of the high ammonia nitrogen wastewater is greatly improved; greatly reduces the investment cost and the running cost of a treatment facility of the high ammonia nitrogen wastewater, and simultaneously avoids the problem of secondary pollution or solid waste generated in the treatment process.

Description

Treatment method of high ammonia nitrogen wastewater
Technical Field
The invention relates to the technical field of sewage treatment, in particular to the technical field of industrial sewage treatment, and particularly relates to a treatment method of high ammonia nitrogen wastewater.
Background
The high ammonia nitrogen wastewater mainly comes from fertilizers, coking, petrifaction, pharmacy, foods, refuse landfills and the like, the ammonia nitrogen concentration in the high ammonia nitrogen wastewater is normally between 1500mg/L and 6000mg/L, the PH is neutral to about 11.5, or the salt content is more than 30000 mg/L; but also contain a large amount of other organic contaminants or toxic substances. The large amount of high ammonia nitrogen wastewater is discharged into the water body, which not only causes eutrophication of the water body and causes black and odorous water body, increases the difficulty and cost of water supply treatment, even has toxic action on crowds and organisms, but also has a biological method aiming at the treatment process of the high ammonia nitrogen wastewater, and when the high ammonia nitrogen wastewater is treated by the biological method, the high ammonia nitrogen wastewater can be treated only after being diluted, and various treatment processes including a physicochemical method and the like.
The formation of the high ammonia nitrogen wastewater is generally caused by the coexistence of ammonia water and inorganic ammonia, the main source of the high ammonia nitrogen in the wastewater with the pH generally above neutral is the combined action of the inorganic ammonia and the ammonia water, and the high ammonia nitrogen in the wastewater under the acidic condition of the pH is mainly caused by the inorganic ammonia. The high ammonia nitrogen in the wastewater mainly comprises two types, one type is the high ammonia nitrogen formed by ammonia water, the other type is the high ammonia nitrogen formed by inorganic ammonia, and the main types are ammonium sulfate, ammonium chloride and the like.
Current treatment process for high ammonia nitrogen wastewater
Because the high ammonia nitrogen waste water is very difficult to adopt the traditional biological treatment process, the traditional treatment process of the normal high ammonia nitrogen waste water comprises the following steps:
1. blow-off method
In alkaline conditions, a method for separation by utilizing the gas-liquid equilibrium relationship between the gas-phase concentration and the liquid-phase concentration of ammonia nitrogen is generally considered to be related to temperature, pH and gas-liquid ratio. The technology has large difficulty in recovering ammonia nitrogen and is easy to generate secondary pollution; the operation cost is high, and the recovered ammonia salt needs further purification to be continuously utilized.
2. Deaminizing method of zeolite
By using cations in zeolite and NH in wastewater 4 + Exchange to achieve the purpose of denitrification. Boiling must be considered in applying zeolite deaminationThe regeneration of stone is usually carried out by a regeneration solution method and an incineration method. When the incineration method is adopted, the generated ammonia gas must be treated, the method is suitable for treating low-concentration ammonia nitrogen wastewater, and the content of ammonia nitrogen is 10-20 mg/L. More waste is generated, the subsequent treatment difficulty is high, and secondary pollution is faced.
3. Membrane separation technology
A method for removing ammonia nitrogen by utilizing the selective permeability of a membrane. The method has the advantages of convenient operation, high ammonia nitrogen recovery rate and no secondary pollution. For example: and removing ammonia nitrogen by a steam-water separation membrane. The ammonia nitrogen has dissociation equilibrium in water, and as the pH value is increased, the ammonia NH in the water 3 The shape proportion is increased, NH is carried out under certain temperature and pressure 3 Is in equilibrium with both the gaseous and liquid states. Based on the principle of chemical equilibrium shift, namely the Lu Chadelli (A.L.LE Chatelier) principle. All balances are relative and temporary in nature. Chemical equilibrium is maintained only under certain conditions "if one of the conditions of the equilibrium system, such as concentration, pressure or temperature, is changed, the equilibrium is shifted in a direction that attenuates the change. "the following design concept is carried out according to the principle, wherein one side of the membrane is high-concentration ammonia nitrogen wastewater, and the other side of the membrane is acidic aqueous solution or water. When the left side temperature T1>20， PH1>9，P1>P2 is maintained at a certain pressure difference, so that the free ammonia NH in the wastewater 4 + Is changed into ammonia molecule NH 3 And diffused to the membrane surface through the raw material liquid side interface, passes through the membrane pores under the action of the partial pressure difference of the membrane surface, enters the absorption liquid, and rapidly reacts with H in the acidic solution + The reaction produces ammonium salt.
The method has the advantages of high investment cost, short service life of the membrane, high replacement cost and high operation cost.
MAP precipitation method
Mainly utilizes the following chemical reactions: mg (magnesium) 2+ +NH 4 + +PO 4 3- ＝MgNH 4 PO 4
Theoretically, adding phosphorus salt and magnesium salt into wastewater containing high-concentration ammonia nitrogen in a certain proportion, namely [ Mg ] 2+ ][NH 4 + ][PO 4 3- ]>2.5×10–Magnesium Ammonium Phosphate (MAP) can be generated when 13 hours, and ammonia nitrogen in the wastewater is removed. More waste is generated, the subsequent treatment difficulty is high, and secondary pollution is faced.
5. Chemical oxidation process
A method for removing ammonia nitrogen by directly oxidizing the ammonia nitrogen into nitrogen by using a strong oxidant. The breaking point chlorination is to utilize ammonia generated by the reaction of ammonia and chlorine in water to remove ammonia, and the method can also play a role in sterilization, but the generated residual chlorine has an influence on fishes, so that a residual chlorine removal facility is required to be additionally arranged.
Because the high ammonia nitrogen wastewater is directly difficult to treat and can be biochemically treated after being diluted in a certain proportion before treatment, the high ammonia nitrogen wastewater basically adopts the traditional physicochemical treatment process, and the methods have the problems of extremely high investment cost, extremely high operation cost, secondary pollution to a certain degree and the like.
Secondly, the current technical difficulty of the biological denitrification method
The traditional and newly developed denitrification processes comprise A/O, a two-stage activated sludge method, a strong-oxidation aerobic biological treatment method, a short-cut nitrification and denitrification method, an ultrasonic stripping ammonia nitrogen treatment method and the like.
Biological nitrification and denitrification are the most widely applied denitrification modes, and are an economical method for removing ammonia nitrogen in water, and the principle is to simulate the circulation of nitrogen in natural ecological environment and convert the ammonia nitrogen in the water into nitrogen by utilizing the combined action of nitrifying bacteria and denitrifying bacteria so as to achieve the aim of denitrification. Because a large amount of oxygen is needed in the ammonia nitrogen oxidation process, the aeration cost becomes the main expense of the denitrification mode. The short-cut nitrification and denitrification controls the oxidation of ammonia nitrogen in a nitrosation stage, and then denitrification is carried out, so that two links of oxidizing nitrite into nitrate and reducing the nitrate into nitrite in the traditional biological denitrification (namely, the ammonia nitrogen is oxidized into nitrite nitrogen to carry out denitrification) are omitted. This technique has great advantages: the oxygen supply amount is saved by 25 percent, and the energy consumption is reduced; reducing 40% of carbon source, and realizing denitrification under the condition of lower C/N; the reaction process is shortened, and the volume of the denitrification tank is saved by 50%; the sludge yield is reduced, the sludge can be produced by about 33 to 35 percent in the nitrification process, and the sludge can be produced by about 55 percent in the denitrification stage. The key to realize the short-cut nitrification and denitrification biological denitrification technology is to control the nitrification in the stage of nitrite and prevent the further oxidation of nitrite. The biggest problem of the methods is that the tolerable ammonia nitrogen index is normally 200-300 mg/L and can be up to about 500mg/L, and the method is difficult to treat the ammonia nitrogen with the ammonia nitrogen being as high as 1000-6000 mg/L.
According to the water quality characteristics of the high ammonia nitrogen wastewater, the prior high ammonia nitrogen wastewater treatment process and the limit conditions of the conventional biochemical denitrification process, the inventor develops an extreme microbial strain aiming at a high ammonia environment by combining the water quality characteristics of the wastewater and the technical accumulation in the field of microorganisms for many years, thereby realizing the conversion and removal of ammonia nitrogen in the extreme high ammonia nitrogen environment.
Disclosure of Invention
The invention provides a method for treating high ammonia nitrogen wastewater, aiming at solving the technical problem of converting and removing ammonia nitrogen in the high ammonia nitrogen wastewater under the conditions of low cost and no secondary pollution or solid waste. The technology of the invention provides a biological treatment way for the treatment of the high ammonia nitrogen wastewater; the technology of the invention can greatly improve the ammonia nitrogen tolerant concentration of biological treatment of the high ammonia nitrogen wastewater; the investment cost of treatment facilities of the high ammonia nitrogen wastewater is greatly reduced; the technology greatly reduces the operation cost in the high ammonia nitrogen wastewater treatment process, and simultaneously avoids the secondary pollution problem or solid waste generated in the treatment process.
In order to achieve the aim, the invention provides a method for treating high ammonia nitrogen wastewater, which comprises the following steps:
filling a composite biological filler in an aerobic device, and adding a composite microbial strain which is activated and domesticated in the aerobic device filled with the composite biological filler;
step two, decomposing ammonia nitrogen in the pretreated high ammonia nitrogen wastewater by activating and domesticating the compound microorganism strains on the compound biological filler, wherein the reaction equation is as follows:
NH 4 + +O 2 →NO 3 - +H 2 O；
wherein the composite biological filler comprises: fly ash, polyaluminium chloride and oyster shell;
the compound microorganism strain comprises: bacillus circulans (Bacillus circulans), Sporosarcina (Sporosarcina pasteurii), Nitrosomonas (Nitrosomonas), Nitrobacter (Nitrobacter), Bacillus alkalophilus (Bacillus akalophilus) and Bacillus faecalis (Streptococcus faecalis).
Further, the mass ratio of the compound microorganism strains is as follows:
bacillus circulans (Bacillus circulans): sporosarcina (Sporosarcina pasteurii): nitrosomonas (nitrosolonas): nitrifying bacillus (Nitrobacter): bacillus alcalophilus (Bacillus akalophilus): coprococcus faecalis (Streptococcus faecalis) ═ 8-16%: (10-20%): (15-25%): (20-30%): (10-18%): (5-10%).
Further, the activation domestication method of the compound microorganism strains comprises the following steps:
the method comprises the following steps of mixing a compound microorganism strain, 10% ammonia water and high ammonia nitrogen wastewater according to the mass ratio of 1%: 40-50%: uniformly mixing 45-55% of the raw materials, and aerating for 40-60 hours.
Further, 5-12 kg of activated and domesticated compound microorganism strains are added to each ton of high ammonia nitrogen wastewater; and determining the reaction residence time according to the ammonia nitrogen concentration of the high ammonia nitrogen wastewater, wherein the reaction residence time is 24-96 hours.
Further, the mechanism for activating the domesticated compound microorganism strain to remove ammonia nitrogen in the high ammonia nitrogen wastewater comprises:
bacillus circulans (Bacillus circulans), Sporosarcina (Sporosarcina pasteurii), Nitrosomonas (Nitrosomonas), Nitrobacter (Nitrobacter), Bacillus alkalophilus (Bacillus akalophilus) and Bacillus faecalis (Streptococcus faecalis) are alkalophilic strains, and can tolerate the pH of 9.5-11.3; has good adaptability to the alkaline pH environment of high ammonia nitrogen wastewater, and the number of effective viable bacteria of the bacterial strain is more than 45 hundred million/g.
Further, the preparation method of the composite biological filler comprises the following steps:
the fly ash, the polyaluminium chloride and the oyster shell are formed into powder according to the mass ratio, the powder is uniformly mixed, the powder is pressed into a mould, and the mould is heated intermittently by a microwave oven and is nourished by water to form a microporous granular material with 5-8 meshes.
Further, the mass ratio of the composite biological filler is as follows:
fly ash: polyaluminum chloride: oyster shell (40-60%): (10-25%): (30-50%).
Further, the action mechanism of the composite biological filler comprises:
the composite biological filler induces the metabolism process of the activated and domesticated composite microbial strains to produce enzymes, provides a metabolic environment and an attached carrier for the activated and domesticated composite microbial strains to form a high-activity high-density microbial film, and decomposes ammonia nitrogen in the pretreated high-ammonia nitrogen wastewater through the activated and domesticated composite microbial strains on the microbial film.
Further, the filling rate of the composite biological filler in the aerobic device is 80 percent of the effective pool volume.
Further, the aerobic plant comprises an aerobic section of an aerobic plant or biochemical system with an aeration system.
The invention provides a method for treating high ammonia nitrogen wastewater, which adopts a total biological treatment method aiming at ultrahigh ammonia nitrogen wastewater with the concentration of 1000-6000 mg/L and the pH value of more than 9.5, provides technical possibility for realizing standard discharge of the ultrahigh ammonia nitrogen wastewater by adopting a total biological treatment process, and can improve the limit concentration of the traditional biochemical treatment, particularly the ammonia nitrogen, to 6000mg/L and improve the biological bearing concentration of the biochemical treatment by more than 10 times.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention is suitable for performing ammonia nitrogen biochemical treatment on the water with the ammonia nitrogen concentration of 1000-6000 mg/L and the pH value of 9.5-12.5 in the high ammonia nitrogen wastewater. The ammonia nitrogen and pH concentration of the ammonia nitrogen and the pH concentration of the ammonia nitrogen cannot be treated by a conventional biochemical system. The invention adopts a special alkalophilic compound microorganism strain capable of metabolizing ammonia nitrogen.
Example one
The embodiment of the invention provides a method for treating high ammonia nitrogen wastewater, which comprises the following steps:
filling a composite biological filler in an aerobic device, and adding a composite microbial strain which is activated and domesticated in the aerobic device filled with the composite biological filler;
step two, decomposing ammonia nitrogen in the pretreated high ammonia nitrogen wastewater by activating and domesticating the compound microorganism strains on the compound biological filler, wherein the reaction equation is as follows:
NH 4 + +O 2 →NO 3 - +H 2 O；
wherein the composite biological filler comprises: fly ash, polyaluminium chloride and oyster shell;
the compound microorganism strain comprises: bacillus circulans (Bacillus circulans), Sporosarcina (Sporosarcina pasteurii), Nitrosomonas (Nitrosomonas), Nitrobacter (Nitrobacter), Bacillus alkalophilus (Bacillus akalophilus) and Bacillus faecalis (Streptococcus faecalis).
Further, the mass ratio of the compound microorganism strains is as follows:
bacillus circulans (Bacillus circulans): sporosarcina (Sporosarcina pasteurii): nitrosomonas (nitrosolonas): nitrifying bacillus (Nitrobacter): bacillus alcalophilus (Bacillus akalophilus): coprococcus faecalis (Streptococcus faecalis) ═ 8-16%: (10-20%): (15-25%): (20-30%): (10-18%): (5-10%).
Further, the activation domestication method of the compound microorganism strains comprises the following steps:
the method comprises the following steps of mixing a compound microorganism strain, 10% ammonia water and high ammonia nitrogen wastewater according to the mass ratio of 1%: 40-50%: uniformly mixing 45-55% of the raw materials, and aerating for 40-60 hours.
Further, 5-12 kg of activated and domesticated compound microorganism strains are added to each ton of high ammonia nitrogen wastewater; and determining the reaction residence time according to the ammonia nitrogen concentration of the high ammonia nitrogen wastewater, wherein the reaction residence time is 24-96 hours.
Further, the mechanism for activating the domesticated compound microorganism strain to remove ammonia nitrogen in the high ammonia nitrogen wastewater comprises:
the Bacillus circulans (Bacillus circulans), the Sporosarcina (Sporosarcina pasteurii), the Nitrosomonas (Nitrosomonas), the Nitrobacter (Nitrobacter), the Alkaliphilus (Bacillus akalophilus) and the Strococcus faecalis (Streptococcus faecalis) are alkalophilic strains, and the tolerance pH is between 9.5 and 11.3; has good adaptability to the alkaline pH environment of high ammonia nitrogen wastewater, and the number of effective viable bacteria of the bacterial strain is more than 45 hundred million/g. Therefore, the alkalophilic and high-activity microbial strain can effectively adapt to the ultrahigh ammonia nitrogen wastewater environment and can effectively utilize or convert ammonia nitrogen so as to effectively remove ammonia nitrogen in wastewater.
Further, the preparation method of the composite biological filler comprises the following steps:
the fly ash, the polyaluminium chloride and the oyster shell are formed into powder according to the mass ratio, the powder is uniformly mixed, the powder is pressed into a mould, and the mould is heated intermittently by a microwave oven and is nourished by water to form a microporous granular material with 5-8 meshes. The microporous granular material with 5-8 meshes has larger specific surface area and stronger adsorption capacity, is rich in various metals and trace elements, and has the effects of inducing the metabolic process of microbial strains to produce enzyme and the like.
Further, the mass ratio of the composite biological filler is as follows:
fly ash: polyaluminum chloride: oyster shell (40-60%): (10-25%): (30-50%).
Further, the action mechanism of the composite biological filler comprises:
the composite biological filler induces enzyme production in the process of activating and domesticating the metabolism of the composite microbial strains, provides a metabolic environment and an attached carrier for the activated and domesticated composite microbial strains, and a large number of added microbial strains form a high-density active microbial film on the filler, so that the biological film enriches a large number of high-activity microbial strains, can quickly capture ammonia nitrogen in wastewater, and quickly decomposes the captured ammonia nitrogen through the composite microbial strains on the microbial film.
Further, the filling rate of the composite biological filler in the aerobic device is 80 percent of the effective pool volume.
Further, the aerobic plant comprises an aerobic section of an aerobic plant or biochemical system with an aeration system.
The invention provides a method for treating high ammonia nitrogen wastewater, which aims at the ultrahigh ammonia nitrogen (1000 mg/L-6000 mg/L) concentration and adopts a full biological treatment method for alkaline wastewater. The technology of the invention provides technical possibility for the ultra-high ammonia nitrogen wastewater to achieve the discharge reaching the standard by adopting a full biological treatment process, the traditional biochemical treatment especially has the limit concentration of ammonia nitrogen bearing 500mg/L, but the technology of the invention can improve the limit concentration to 6000mg/L and improve the biological bearing concentration of the biochemical treatment by more than 10 times. As shown in table 1:
TABLE 1
Patent of the invention Conventional techniques
The upper limit of the ammonia nitrogen capacity is 6000mg/L The conventional biological technology is only 500mg/L
The hardware investment is low Large investment of hardware
No waste and secondary pollution Producing waste articles or having secondary pollution
Low energy consumption High energy consumption
In order to fully understand the technical scheme of the invention, the invention provides a specific example as follows:
the implementation process of the embodiment of the invention is as follows:
1. analyzing the water quality of high ammonia nitrogen, wherein parameters such as ammonia nitrogen indexes, salinity, PH and the like are included;
such as: ammonia nitrogen is between 1000mg/L and 6000mg/L, the pH value is between 9.5 and 11.5, and the technology is suitable for the ammonia nitrogen. And determines the amount of wastewater that needs to be treated.
2. Determining the proportion of the compound microorganism strains and the proportion of the compound biological filler according to the parameters of water quality analysis; then activating and domesticating the compound microorganism strains; the size of the aerobic device for adding the synbiotic filler is determined according to the water quality and the water quantity.
3. In the reaction process, ammonia nitrogen in water is decomposed by the activated and domesticated compound microorganism strains on the compound biological filler, the residence time is determined according to different ammonia nitrogen concentrations and water quality conditions, and the reaction residence time is generally 24-96 hours.
And detecting indexes such as ammonia nitrogen, PH and the like in the influent high ammonia nitrogen wastewater in the running process, and detecting the ammonia nitrogen index tracking running efficiency of the effluent.
Case analysis:
the invention is a practical case-Jiangxi chemical plant
The original method for treating the high ammonia nitrogen wastewater by using the air stripping membrane has the water volume of 300 tons/day, the ammonia nitrogen concentration of a comprehensive adjusting tank is about 5000mg/L, the pH value is 11.0-11.6, the COD concentration is less than 300mg/L, the connection standard of a garden is that the COD is less than 500mg/L, and the ammonia nitrogen concentration is less than 35 mg/L.
The implementation process of the invention is as follows:
the mass ratio of the compound microbial strains is as follows: bacillus circulans (Bacillus circulans): sporosarcina (Sporosarcina pasteurii): nitrosomonas (nitrosolonas): nitrifying bacillus (Nitrobacter): bacillus alcalophilus (Bacillus akalophilus): coprococcus faecalis (Streptococcus faecalis) 15%: 18%: 19%: 20%: 18%: 10 percent.
The mass ratio of the composite biological filler is as follows: fly ash: polyaluminum chloride: oyster shell 55%: 15%: 30 percent; baking to obtain 5-8 mesh granules.
The compound microorganism strains are as follows: compound microorganism strains: 10% aqueous ammonia: the high ammonia nitrogen wastewater of this project is 1%: 45%: uniformly mixing 45% of the components, and aerating for 55 hours to obtain a bacterial liquid for activating the domesticated compound microorganism bacterial strains; adding the fired composite biological filler into an aerobic tank of the existing system, and adding about 800 cubic composite biological fillers by using 1000 cubic bodies of the existing aerobic tank; and (2) starting continuous inflow for treating 300 cubes per day, supplementing 3000kg of bacteria liquid per day, continuously supplementing for 24 hours, and periodically detecting the inflow ammonia nitrogen data of the system:
the effect of the patented technology treatment followed by 30 days of operation (average) is shown in table 2:
TABLE 2
Item Before treatment After treatment Removal rate
COD 345mg/L 320mg/L --
Ammonia nitrogen 6000mg/L 24mg/L 99.6％
The invention can realize the continuous water inlet and outlet of the system and the continuous and automatic adding process of the composite biological strains, can ensure the stable ammonia nitrogen treatment effect of the system, the stable standard discharge of the outlet water, no secondary pollution and no special management requirement; the operation cost is 30 yuan/ton water, no sludge is generated, the original technical treatment effect is unstable, the membrane needs to be cleaned and replaced periodically, the operation cost is high, and the operation cost of stripping membrane separation is 60 yuan/ton water.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and shall cover the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (10)

1. A method for treating high ammonia nitrogen wastewater is characterized by comprising the following steps:
filling a composite biological filler in an aerobic device, and adding a composite microbial strain which is activated and domesticated in the aerobic device filled with the composite biological filler;
step two, decomposing ammonia nitrogen in the pretreated high ammonia nitrogen wastewater by activating and domesticating the compound microorganism strains on the compound biological filler, wherein the reaction equation is as follows:
NH 4 + +O 2 →NO 3 - +H 2 O；
wherein the composite biological filler comprises: fly ash, polyaluminium chloride and oyster shell;
the compound microorganism strain comprises: bacillus circulans (Bacillus circulans), Sporosarcina (Sporosarcina pasteurii), Nitrosomonas (Nitrosomonas), Nitrobacter (Nitrobacter), Bacillus alkalophilus (Bacillus akalophilus) and Bacillus faecalis (Streptococcus faecalis).
2. The method according to claim 1, wherein the mass ratio of the complex microbial strains is:
bacillus circulans (Bacillus circulans): sporosarcina (Sporosarcina pasteurii): nitrosomonas (nitrosolonas): nitrifying bacillus (Nitrobacter): bacillus alcalophilus (Bacillus akalophilus): coprococcus faecalis (Streptococcus faecalis) ═ 8-16%: (10-20%): (15-25%): (20-30%): (10-18%): (5-10%).
3. The method according to claim 1 or 2, wherein the activation acclimation method of the complex microorganism strain comprises:
the method comprises the following steps of mixing a compound microorganism strain, 10% ammonia water and high ammonia nitrogen wastewater according to the mass ratio of 1%: 40-50%: uniformly mixing 45-55% of the raw materials, and aerating for 40-60 hours.
4. The method according to claim 1, wherein 5-12 kg of the domesticated compound microorganism strains are added for each ton of high ammonia nitrogen wastewater treatment; and determining the reaction residence time according to the ammonia nitrogen concentration of the high ammonia nitrogen wastewater, wherein the reaction residence time is 24-96 hours.
5. The method according to claim 1, wherein the mechanism for activating the domesticated compound microorganism strain to remove ammonia nitrogen in the high ammonia nitrogen wastewater comprises:
bacillus circulans (Bacillus circulans), Sporosarcina (Sporosarcina pasteurii), Nitrosomonas (Nitrosomonas), Nitrobacter (Nitrobacter), Bacillus alkalophilus (Bacillus akalophilus) and Bacillus faecalis (Streptococcus faecalis) are alkalophilic strains, and can tolerate the pH of 9.5-11.3; has good adaptability to the alkaline pH environment of high ammonia nitrogen wastewater, and the number of effective viable bacteria of the bacterial strain is more than 45 hundred million/g.
6. The method of claim 1, wherein the method of making the composite biological filler comprises:
the fly ash, the polyaluminium chloride and the oyster shell are formed into powder according to the mass ratio, the powder is uniformly mixed, the powder is pressed into a mould, and the mould is heated intermittently by a microwave oven and is nourished by water to form a microporous granular material with 5-8 meshes.
7. The method according to claim 1 or 6, wherein the mass ratio of the composite biological filler is:
fly ash: polyaluminum chloride: oyster shell (40-60%): (10-25%): (30-50%).
8. The method of claim 1, wherein the mechanism of action of the composite biological filler comprises:
the composite biological filler induces enzyme production in the metabolic process of the activated and domesticated composite microbial strain, provides a metabolic environment and an attached carrier for the activated and domesticated composite microbial strain, forms a high-activity high-density microbial film, and decomposes ammonia nitrogen in the pretreated high ammonia nitrogen wastewater through the activated and domesticated composite microbial strain on the microbial film.
9. The method of claim 1, wherein the composite biological filler is packed in the aerobic apparatus at a rate of 80% of the effective pond volume.
10. A method according to claim 1 or 9, wherein the aerobic unit comprises an aerobic section of an aerobic unit or biochemical system with an aeration system.
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EP0086587A1 (en) * 1982-01-29 1983-08-24 ENSR Corporation (a Delaware Corporation) Activated sludge wastewater treating process
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CN107619810A (en) * 2017-11-08 2018-01-23 钟华 Mixed bacteria, strain carrier and the method for ammonia nitrogen total nitrogen in sustainable degraded creek black and odorous water
CN114212888A (en) * 2022-01-18 2022-03-22 北京赛富威环境工程技术有限公司 Treatment method of high-concentration industrial wastewater

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* Cited by examiner, † Cited by third party
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EP0086587A1 (en) * 1982-01-29 1983-08-24 ENSR Corporation (a Delaware Corporation) Activated sludge wastewater treating process
CN101259977A (en) * 2007-12-28 2008-09-10 凌亮 Method for removing total nitrogen by using microorganism
CN101941762A (en) * 2010-09-08 2011-01-12 福建微水环保技术有限公司 Method for treating wastewater by utilizing composite microbial preparation
CN102464405A (en) * 2010-11-04 2012-05-23 中国石油化工股份有限公司 Denitrification method by sewage short-cut simultaneous nitrification and denitrification
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