CN114835265B - Treatment method of high ammonia nitrogen wastewater - Google Patents

Treatment method of high ammonia nitrogen wastewater Download PDF

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CN114835265B
CN114835265B CN202210432505.XA CN202210432505A CN114835265B CN 114835265 B CN114835265 B CN 114835265B CN 202210432505 A CN202210432505 A CN 202210432505A CN 114835265 B CN114835265 B CN 114835265B
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ammonia nitrogen
composite
high ammonia
nitrogen wastewater
wastewater
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CN114835265A (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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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
    • 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
    • C02F3/02—Aerobic processes
    • C02F3/10—Packings; Fillings; Grids
    • C02F3/105—Characterized by the chemical composition
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N1/00—Microorganisms, e.g. protozoa; Compositions thereof; Processes of propagating, maintaining or preserving microorganisms or compositions thereof; Processes of preparing or isolating a composition containing a microorganism; Culture media therefor
    • C12N1/20—Bacteria; Culture media therefor
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N1/00—Microorganisms, e.g. protozoa; Compositions thereof; Processes of propagating, maintaining or preserving microorganisms or compositions thereof; Processes of preparing or isolating a composition containing a microorganism; Culture media therefor
    • C12N1/36—Adaptation or attenuation of cells
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/16—Nitrogen compounds, e.g. ammonia
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

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 activated and domesticated composite microorganism strains into the aerobic device filled with the composite biological filler; decomposing ammonia nitrogen in the pretreated high ammonia nitrogen wastewater by activating and domesticating the composite microorganism strain on the composite biological filler. The invention solves the technical problems of low cost and conversion and removal of ammonia nitrogen in the high ammonia nitrogen wastewater under the condition of no secondary pollution or solid waste, and provides a biological treatment way for the treatment of the high ammonia nitrogen wastewater; greatly improves the ammonia nitrogen concentration tolerance of biological treatment of the high ammonia nitrogen wastewater; greatly reduces the investment cost and the operation cost of the treatment facilities of the high ammonia nitrogen wastewater, and simultaneously avoids the problem of secondary pollution or solid waste 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 especially relates to a method for treating high ammonia nitrogen wastewater.
Background
The high ammonia nitrogen wastewater mainly originates from chemical fertilizers, coking, petrochemical industry, pharmacy, food, landfill sites 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 salinity is more than 30000 mg/L; while also containing a significant amount of other organic contaminants or toxic substances. The wastewater with high ammonia nitrogen is discharged into water body, which not only causes eutrophication of water body and causes black and odorous water body, but also increases difficulty and cost of water treatment and even produces toxic effect on crowd and organisms.
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 value generally above neutral is the combined action of the inorganic ammonia and the ammonia water, and the high ammonia nitrogen in the wastewater with the pH value under the acidic condition is mainly caused by the inorganic ammonia. The composition of high ammonia nitrogen in the wastewater mainly comprises two types, namely high ammonia nitrogen formed by ammonia water and high ammonia nitrogen formed by inorganic ammonia, mainly ammonium sulfate, ammonium chloride and the like.
1. Current treatment process of high ammonia nitrogen wastewater
Because the high ammonia nitrogen wastewater is very difficult to adopt the traditional biological treatment process, the normal traditional treatment process of the high ammonia nitrogen wastewater comprises the following steps:
1. stripping method
In alkaline conditions, a method for separation using the gas-liquid equilibrium relationship between the concentration of ammonia nitrogen in the gas phase and the concentration of ammonia nitrogen in the liquid phase is generally considered to be related to the temperature, pH and gas-liquid ratio. The technology has the defects of high ammonia nitrogen recovery difficulty and easiness in secondary pollution; the operation cost is high, and the recovered ammonia salt needs further purification to be continuously utilized.
2. Zeolite deamination process
Utilizing cations in zeolite and NH in wastewater 4 + Exchange is performed to achieve the aim of denitrification. The zeolite deamination method must be applied in consideration of the problem of zeolite regeneration, and there are usually a regeneration liquid 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 ammonia nitrogen content is 10-20 mg/L. More wastes are generated, the subsequent treatment difficulty is high, and secondary pollution is caused.
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 dissociation equilibrium exists in the water of ammonia nitrogen, and as the pH rises, the ammonia becomes NH in the water 3 The morphological proportion is increased, NH is carried out at a certain temperature and pressure 3 Is balanced between the gaseous and liquid phases. According to the principle of chemical equilibrium shift, i.e. the luer. Cha Deli (a.l.le Chatelier) principle. In nature all balances are relative and transient. The chemical equilibrium is maintained only under certain conditions and if one of the conditions of the equilibrium system is changed, such as concentration, pressure or temperature, the equilibrium is shifted in a direction that will attenuate the change. "The following design concept is carried out according to the principle that high-concentration ammonia nitrogen wastewater is arranged on one side of the membrane, and an acidic aqueous solution or water is arranged on the other side of the membrane. When the left side temperature T1>20，PH1>9，P1>P2 keeps a certain pressure difference, then free ammonia NH in the wastewater 4 + Becomes ammonia molecule NH 3 And diffuse to the surface of the membrane through the side interface of the raw material liquid, pass through the membrane holes under the action of the partial pressure difference of the membrane surface, enter the absorption liquid and quickly react with H in the acid solution + Reacting to generate ammonium salt.
The method has the advantages of high investment cost, short service life of the membrane, high replacement cost and high running cost.
MAP precipitation method
Mainly uses the following chemical reactions: mg of 2+ +NH 4 + +PO 4 3- ＝MgNH 4 PO 4
In theory, adding phosphorus salt and magnesium salt into the wastewater containing high concentration ammonia nitrogen in a certain proportion, when [ Mg 2+ ][NH 4 + ][PO 4 3- ]>2.5X10-13, magnesium Ammonium Phosphate (MAP) can be generated to remove ammonia nitrogen in the wastewater. More wastes are generated, the subsequent treatment difficulty is high, and secondary pollution is caused.
5. Chemical oxidation process
A method for directly oxidizing ammonia nitrogen into nitrogen by using a strong oxidant for removal. The method can also play a role in sterilization by utilizing ammonia in water to react with chlorine to generate ammonia gas for deamination, but the generated residual chlorine can affect fish, so that a residual chlorine removal facility is needed.
Because the high ammonia nitrogen wastewater is difficult to treat directly, and needs to be diluted in a certain proportion before treatment, the high ammonia nitrogen wastewater basically adopts the traditional physical and chemical treatment process, and the problems of extremely high investment cost, extremely high running cost, secondary pollution to a certain extent and the like are solved.
2. The current technical difficulties of biological denitrification method
The traditional and newly developed denitrification process comprises an A/O method, a two-stage activated sludge method, a strong oxidation aerobic biological treatment method, a short-cut nitrification denitrification method, an ultrasonic stripping ammonia nitrogen treatment method and the like.
Biological nitrification and denitrification are the most widely applied denitrification modes, are economical methods for removing ammonia nitrogen in water, and are based on the principle of simulating the circulation of nitrogen in natural ecological environment, and the ammonia nitrogen in water is converted 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 are to control the oxidation of ammonia nitrogen in a nitrosation stage, and then to perform denitrification, so that two links of oxidizing nitrite into nitrate and reducing nitrite in the traditional biological denitrification (namely, oxidizing ammonia nitrogen into nitrite nitrogen to perform denitrification) are omitted. The technology has great advantages: the oxygen supply amount is saved by 25%, and the energy consumption is reduced; the carbon source is reduced by 40%, and denitrification is realized under the condition of lower C/N; the reaction process is shortened, and the volume of a denitrification tank is saved by 50%; the sludge yield is reduced, the nitrifying process can reduce the sludge yield by about 33-35%, and the denitrifying stage reduces the sludge yield by about 55%. The key to realize the short-cut nitrification and denitrification biological denitrification technology is to control the nitrification in the nitrous acid stage to prevent the further oxidation of nitrite. The biggest problem of these methods is that the tolerable ammonia nitrogen index is normally 200-300 mg/L, up to about 500mg/L, and the biological methods for ammonia nitrogen up to 1000-6000 mg/L are difficult to treat.
According to the water quality characteristics of high ammonia nitrogen wastewater, the previous high ammonia nitrogen wastewater treatment process and the limit conditions of the traditional biochemical denitrification process, the inventor combines the water quality characteristics of the wastewater and the technical accumulation in the field of microorganisms for years, develops an extreme microorganism strain aiming at the high ammonia-philic environment, and further realizes ammonia nitrogen conversion and removal in the extreme high ammonia nitrogen environment.
Disclosure of Invention
The invention provides a treatment method of high ammonia nitrogen wastewater, which aims to solve the technical problems of low cost and conversion and removal of ammonia nitrogen in the high ammonia nitrogen wastewater under the condition of no secondary pollution or solid waste. The technology provides a biological treatment way for the treatment of the high ammonia nitrogen wastewater; the technology can greatly improve the ammonia nitrogen concentration tolerance of biological treatment of high ammonia nitrogen wastewater; greatly reduces the investment cost of the treatment facilities of the high ammonia nitrogen wastewater; the technology of the invention greatly reduces the running cost in the treatment process of the high ammonia nitrogen wastewater, and simultaneously avoids the problem of secondary pollution or solid waste in the treatment process.
In order to achieve the above purpose, the method for treating high ammonia nitrogen wastewater provided by the invention comprises the following steps:
filling composite biological filler in an aerobic device, and adding activated and domesticated composite microorganism strains in the aerobic device filled with the composite biological filler;
decomposing ammonia nitrogen in the pretreated high ammonia nitrogen wastewater by activating and domesticating the composite microorganism strain on the composite 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, polyaluminum chloride and oyster shell;
the composite microbial strain comprises: bacillus circulans (Bacillus circuans), sarcina sporosarcina (Sporosarcina pasteurii), nitrosomonas, nitrobacter (Nitrobacter), bacillus alcalophilus (Bacillus akalophilus) and Bacillus faecalis (Streptococcus faecalis).
Further, the mass ratio of the compound microorganism strain is as follows:
bacillus circulans (Bacillus circuans): spore sarcina (Sporosarcina pasteurii): nitrosation unicellular bacteria (Nitrosomonas): nitrifying bacteria (Nitrobacteria): bacillus alcalophilus (Bacillus akalophilus): fecal coliform (Streptococcus faecalis) = (8-16%): (10-20%): (15-25%): (20-30%): (10-18%): (5-10%).
Further, the method for activating and domesticating the compound microorganism strain comprises the following steps:
the method comprises the steps of (1%) mixing a composite microorganism strain, 10% ammonia water and high ammonia nitrogen wastewater according to a mass ratio of 1%: 40-50%: mixing evenly in proportion of 45-55%, and aerating for 40-60 hours.
Further, 5-12 kg of activated and domesticated compound microorganism strain is added into 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 between 24 and 96 hours.
Further, the mechanism for removing ammonia nitrogen in the high ammonia nitrogen wastewater by activating the domesticated compound microorganism strain comprises the following steps:
bacillus circulans (Bacillus circuans), sarcina spores (Sporosarcina pasteurii), nitrosylated unicellular bacteria (Nitrosomonas), nitrifying bacteria (Nitrobacter), alkalophilic bacillus (Bacillus akalophilus) and faecal cue bacteria (Streptococcus faecalis) are alkalophilic strains, and can tolerate pH between 9.5 and 11.3; has good adaptability to alkaline pH environment of high ammonia nitrogen wastewater, and the effective viable count of the 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 uniformly mixed according to the mass ratio to form powder, the powder is pressed into a mould, and the mould is intermittently heated by a microwave oven and nourished by water to form the 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 enzyme production in the metabolic process of the activated and domesticated composite microorganism strain, provides a metabolic environment and an attached carrier for the activated and domesticated composite microorganism strain, forms a high-activity high-density microbial membrane, and decomposes ammonia nitrogen in the pretreated high-ammonia nitrogen wastewater through the activated and domesticated composite microorganism strain on the microbial membrane.
Further, the filling rate of the composite biological filler in the aerobic device is 80% of the effective tank capacity.
Further, the aerobic device comprises an aerobic device with an aeration system or an aerobic section of a biochemical system.
The invention provides a method for treating high ammonia nitrogen wastewater, which is a full biological treatment method for the ultrahigh ammonia nitrogen wastewater with the concentration of 1000-6000 mg/L and the PH of more than 9.5, and the technology provides technical possibility for realizing standard emission of the ultrahigh ammonia nitrogen wastewater by adopting a full biological treatment process, wherein the limit concentration of the traditional biochemical treatment, particularly ammonia nitrogen bearing is 500mg/L, and the technology can improve the limit concentration to 6000mg/L and the biological bearing concentration of the biochemical treatment by more than 10 times.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
The invention is suitable for carrying out ammonia nitrogen biochemical treatment on water with ammonia nitrogen concentration of 1000 mg/L-6000 mg/L and pH value of 9.5-12.5 in high ammonia nitrogen wastewater. The ammonia nitrogen and pH concentration of the ammonia nitrogen can not be treated by a conventional biochemical system. The invention adopts a special compound microorganism strain which has alkalophilic property and can metabolize ammonia nitrogen.
Example 1
The first embodiment of the invention provides a method for treating high ammonia nitrogen wastewater, which comprises the following steps:
filling composite biological filler in an aerobic device, and adding activated and domesticated composite microorganism strains in the aerobic device filled with the composite biological filler;
decomposing ammonia nitrogen in the pretreated high ammonia nitrogen wastewater by activating and domesticating the composite microorganism strain on the composite 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, polyaluminum chloride and oyster shell;
the composite microbial strain comprises: bacillus circulans (Bacillus circuans), sarcina sporosarcina (Sporosarcina pasteurii), nitrosomonas, nitrobacter (Nitrobacter), bacillus alcalophilus (Bacillus akalophilus) and Bacillus faecalis (Streptococcus faecalis).
Further, the mass ratio of the compound microorganism strain is as follows:
bacillus circulans (Bacillus circuans): spore sarcina (Sporosarcina pasteurii): nitrosation unicellular bacteria (Nitrosomonas): nitrifying bacteria (Nitrobacteria): bacillus alcalophilus (Bacillus akalophilus): fecal coliform (Streptococcus faecalis) = (8-16%): (10-20%): (15-25%): (20-30%): (10-18%): (5-10%).
Further, the method for activating and domesticating the compound microorganism strain comprises the following steps:
the method comprises the steps of (1%) mixing a composite microorganism strain, 10% ammonia water and high ammonia nitrogen wastewater according to a mass ratio of 1%: 40-50%: mixing evenly in proportion of 45-55%, and aerating for 40-60 hours.
Further, 5-12 kg of activated and domesticated compound microorganism strain is added into 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 between 24 and 96 hours.
Further, the mechanism for removing ammonia nitrogen in the high ammonia nitrogen wastewater by activating the domesticated compound microorganism strain comprises the following steps:
the strains above bacillus circulans (Bacillus circuans), sarcina bacillus (Sporosarcina pasteurii), nitrosylated unicellular bacteria (Nitrosomonas), nitrifying bacillus (Nitrobacter), alkalophilic bacillus (Bacillus akalophilus) and faecalis (Streptococcus faecalis) are alkalophilic strains, and can tolerate pH between 9.5 and 11.3; has good adaptability to alkaline pH environment of high ammonia nitrogen wastewater, and the effective viable count of the strain is more than 45 hundred million/g. Therefore, the alkalophilic and high-activity microorganism strain can effectively adapt to the wastewater environment of ultrahigh ammonia nitrogen and can effectively utilize or convert the ammonia nitrogen so as to effectively remove the ammonia nitrogen in the 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 uniformly mixed according to the mass ratio to form powder, the powder is pressed into a mould, and the mould is intermittently heated by a microwave oven and nourished by water to form the microporous granular material with 5-8 meshes. The 5-8 mesh microporous granular material has larger specific surface area, stronger adsorption capacity, and is rich in various metals and microelements, and has the effects of inducing enzyme production in the metabolic process of microorganism strains, 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 metabolic process of the activated and domesticated composite microorganism strains, provides metabolic environment and attached carrier for the activated and domesticated composite microorganism strains, and a large amount of added microorganism strains form a high-density active microorganism film on the filler.
Further, the filling rate of the composite biological filler in the aerobic device is 80% of the effective tank capacity.
Further, the aerobic device comprises an aerobic device with an aeration system or an aerobic section of a biochemical system.
The invention provides a method for treating high ammonia nitrogen wastewater, which aims at the concentration of ultrahigh ammonia nitrogen (1000 mg/L-6000 mg/L) and adopts a full biological treatment method for alkaline wastewater. The technology provides technical possibility for realizing standard emission of the ultra-high ammonia nitrogen wastewater by adopting a full biological treatment process, the limit concentration of the traditional biochemical treatment, particularly ammonia nitrogen bearing is 500mg/L, and the technology can raise the limit concentration to 6000mg/L and raise the biological bearing concentration of the biochemical treatment by more than 10 times. As shown in table 1:
TABLE 1
The patent of the invention Conventional techniques
Upper limit of 6000mg/L of ammonia nitrogen capacity Conventional biotechnology is only 500mg/L
Lower hardware investment High hardware investment
No waste and secondary pollution Generating waste articles or 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, namely analyzing the water quality with high ammonia nitrogen, wherein the water quality comprises ammonia nitrogen indexes, salinity, PH and other parameters;
such as: ammonia nitrogen is 1000 mg/L-6000 mg/L, and pH is 9.5-11.5. And determining the amount of wastewater to be treated.
2. Determining the proportion of the composite microorganism strain and the proportion of the composite biological filler according to the parameters of water quality analysis; then activating and domesticating the compound microorganism strain; the size of the aerobic device for adding the biological filler is determined according to the water quality and the water quantity.
3. In the reaction process, ammonia nitrogen in water is decomposed by activated and domesticated compound microorganism strains on the compound biological filler, and the residence time is determined according to different ammonia nitrogen concentrations and water quality conditions, and is generally between 24 and 96 hours.
And detecting indexes such as ammonia nitrogen, PH and the like in the high ammonia nitrogen wastewater of the inlet water in the running process, and detecting the ammonia nitrogen index tracking running efficiency of the outlet water.
Case analysis:
the actual case of the technology of the invention-Jiangxi certain chemical plant
The original treatment of high ammonia nitrogen wastewater by using a stripping film is carried out, the water quantity is 300 tons/day, the ammonia nitrogen concentration of the comprehensive regulating tank is about 5000mg/L, the pH value is between 11.0 and 11.6, the COD concentration is less than 300mg/L, the COD of the garden connection pipe standard is less than 500mg/L, and the ammonia nitrogen concentration is less than 35mg/L.
The implementation process of the patent adopted by the invention is as follows:
mass ratio of the compound microorganism strain: bacillus circulans (Bacillus circuans): spore sarcina (Sporosarcina pasteurii): nitrosation unicellular bacteria (Nitrosomonas): nitrifying bacteria (Nitrobacteria): bacillus alcalophilus (Bacillus akalophilus): fecal cue bacterium (Streptococcus faecalis) =15%: 18%:19%:20%:18%:10%.
The mass ratio of the composite biological filler is as follows: fly ash: polyaluminum chloride: oyster shell=55%: 15%:30%; baking into 5-8 mesh granule.
The compound microorganism strain is prepared according to the following steps: composite microbial strain: 10% ammonia: high ammonia nitrogen wastewater=1%: 45%: uniformly mixing 45% of the mixed materials, and aerating for 55 hours to obtain a bacterial liquid for activating and domesticating the composite microorganism strain; the fired composite biological filler is added into an aerobic tank of the existing system, 1000 cubes of the existing aerobic tank are utilized, and about 800 cubes of the composite biological filler are added; 300 cubes are treated every day after continuous water inflow, 3000kg of bacterial liquid is replenished every day, continuous replenishment is carried out for 24 hours, and the water inflow ammonia nitrogen data of the system are detected periodically:
the effect of running for 30 days (average) after treatment of the inventive patented technology is shown in table 2:
TABLE 2
Project Before treatment After the treatment Removal rate of
COD 345mg/L 320mg/L --
Ammonia nitrogen 6000mg/L 24mg/L 99.6％
The invention can realize continuous water inlet and continuous water outlet of the system, and the continuous and automatic feeding processing technology of the compound biological bacterial strain can ensure the stable ammonia nitrogen treatment effect of the system, the water outlet is stable and reaches the discharge standard, no secondary pollution is caused, and special management requirements are not required; the operation cost is 30 yuan/ton of water, no sludge is generated, the original technical treatment effect is unstable, the membrane needs to be cleaned and replaced regularly, the operation cost is high, and the operation cost of stripping membrane separation is 60 yuan/ton of water.
The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (5)

1. The method for treating the high ammonia nitrogen wastewater is characterized by comprising the following steps of:
filling composite biological filler in an aerobic device, and adding activated and domesticated composite microorganism strains in the aerobic device filled with the composite biological filler;
decomposing ammonia nitrogen in the high ammonia nitrogen wastewater by activating and domesticating the composite microorganism strain on the composite biological filler, wherein the ammonia nitrogen concentration in the high ammonia nitrogen wastewater is 1000 mg/L-6000 mg/L, and the pH value is 11.0-11.6;
wherein the composite biological filler comprises: fly ash, polyaluminum chloride and oyster shell;
the composite microbial strain comprises: bacillus circulans, sarcina spores, unicellular nitrosation bacteria, nitrifying bacteria, bacillus alcalophilus and streptococcus faecium;
the mass ratio of the compound microorganism strain is as follows: bacillus circulans: spore sarcina: nitrosation unicellular bacteria: nitrifying bacillus: bacillus alcalophilus: streptococcus faecalis= (8-16%): (10-20%): (15-25%): (20-30%): (10-18%): (5-10%);
the composite microorganism strains are alkalophilic strains, and the tolerance pH is 9.5-11.3; the method has good adaptability to the alkaline pH environment of high ammonia nitrogen wastewater, and the effective viable count of the strain is more than 45 hundred million/g;
the activating and domesticating method of the compound microorganism strain comprises the following steps: the method comprises the steps of (1%) mixing a composite microorganism strain, 10% ammonia water and high ammonia nitrogen wastewater according to a mass ratio of 1%: 40-50%: uniformly mixing 45-55% of the components, and aerating for 40-60 hours;
the preparation method of the composite biological filler comprises the following steps: and uniformly mixing the fly ash, the polyaluminium chloride and the oyster shell according to the mass ratio to form powder, pressing the powder into a die, and intermittently heating the die by a microwave oven and nourishing the die by water to form the microporous granular material with 5-8 meshes.
2. The method of claim 1, wherein 5-12 kg of activated and domesticated composite microorganism strains are added per ton of high ammonia nitrogen wastewater treated; 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.
3. The method of claim 1, wherein the mass ratio of the composite biological filler is: fly ash: polyaluminum chloride: oyster shell= (40-60%): (10-25%): (30-50%).
4. The method of claim 1, wherein the composite biofilm carrier has a fill rate in the aerobic apparatus of 80% of the effective pond volume.
5. The method of claim 1 or 4, wherein the aerobic apparatus comprises an aerobic apparatus with an aeration system or an aerobic section of a biochemical system.
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