CN108640294B - Method for treating biochemical tail end of chemical or pesticide wastewater - Google Patents
Method for treating biochemical tail end of chemical or pesticide wastewater Download PDFInfo
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- CN108640294B CN108640294B CN201810511120.6A CN201810511120A CN108640294B CN 108640294 B CN108640294 B CN 108640294B CN 201810511120 A CN201810511120 A CN 201810511120A CN 108640294 B CN108640294 B CN 108640294B
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- 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
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/306—Pesticides
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/343—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the pharmaceutical industry, e.g. containing antibiotics
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Abstract
The invention provides a method for treating biochemical tail end of chemical or pesticide wastewater, which comprises the following steps: analyzing the water quality parameters of biochemical effluent of chemical or pesticide wastewater and the characteristics of residual pollutants in the water quality; preparing an optimal strain according to the existence form of the pollutant in the water quality parameter of the biochemical effluent of the chemical or pesticide wastewater; activating and domesticating the strains by using target water quality, and determining the optimal material and form of the biological carrier; dynamically adding the activated and domesticated strain according to the water quality and the water quantity of the incoming water. The invention relates to a latest wastewater biological treatment technology aiming at a further biochemical treatment process of sewage after biochemical treatment in chemical and pesticide industries, which is used for further analyzing the water quality after the existing wastewater treatment, screening the best strain and further treating the strain by combining with a biological filler, and can reduce the water quality by 50 percent or more on the basis of the existing biochemical effluent. The invention has obvious effect on the chemical and pesticide wastewater after biochemical treatment, reduces the operation cost for enterprises and has better environmental benefit.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a method for treating biochemical tail ends of chemical or pesticide wastewater.
Background
With the continuous improvement of the environmental protection requirement, particularly, the sewage treatment in the pesticide chemical industry brings certain challenges, the traditional process treatment comprises combined biochemical treatment processes of A/0, SBR, A2/O2, IC, UASB, CASS, A2/0, contact oxidation process and the like, and is difficult to reach the emission standard, particularly, the ammonia nitrogen treatment of the industrial sewage reaches the standard more difficultly, so that an enterprise has to adopt a physicochemical treatment process with high investment and high operation cost at the biochemical rear end, thereby greatly increasing the burden of the enterprise and simultaneously increasing the environmental burden.
Disclosure of Invention
The invention provides a method for treating biochemical tail end of chemical or pesticide wastewater, which is used for further treating water quality after biochemical treatment of wastewater in the chemical and pesticide industry, and by newly building a first-stage biochemical treatment, combining a filler and adding a certain amount of dominant microbial inoculum, the current biochemical effluent is discharged up to the standard, and the technical problem of how to improve the removal capacity of pollutants is solved.
In order to achieve the above object, the present invention provides a method for treating biochemical tail end of chemical or pesticide wastewater, comprising:
step one, analyzing the water quality parameters of biochemical effluent of chemical or pesticide wastewater and the characteristics of residual pollutants in water quality;
step two, preparing an optimal strain according to the existence form of the pollutants in the biochemical effluent quality parameters of the chemical or pesticide wastewater;
step three, activating and domesticating the strains by using target water quality, and determining the optimal material and form of the biological carrier;
and step four, dynamically adding the activated and domesticated strains according to the water quality and water quantity of the incoming water.
In the first step, the chemical or pesticide wastewater biochemical effluent quality parameters comprise: COD, BOD/COD, salinity, PH and major pollutants.
In the first step, the characteristics of the water quality residual pollutants comprise:
the COD of the chemical or pesticide wastewater after biochemical end treatment is less than 800mg/L, the BOD/COD is less than 0.25, the salt content is less than 8000mg/L, the ph is between 7 and 8.5, and the main pollutants are organic matters with a carbon molecular structure more than 5.
In the second step, the optimal strains comprise: halophilic archaea, sulfate-reducing archaea, photosynthetic bacteria, Rhodospirillum lutescens, Rhodopseudomonas sphaeroides Nocardia, Ganoderma (Clostridium purpuricum), nitrate and nitrite bacteria, Bacillus subtilis, and Corynebacterium.
Further, the water quality parameter COD of the biochemical effluent of the chemical or pesticide wastewater is 500-:
halophilic archaea: sulfate-reduced archaea: photosynthetic bacteria: rhodospirillum lutescens: rhodopseudomonas spheroids: nocardia: bacillus prodigiosus (Clostridium purpuricum): nitrate bacteria: an nitrite bacterium: bacillus subtilis: the mixing ratio of the corynebacteria is 1:1.2:1.5:1:2:1:1.6:1.2:2:3.5:5, and the ratio of the optimum strain after mixing to the ratio of the optimum strain after treating the wastewater is 1.8: 6000.
Further, the water quality parameter COD of the biochemical effluent of the chemical or pesticide wastewater is 500-300mg/L, B0D/COD is less than 0.25, and the optimal strain proportion is as follows:
halophilic archaea: sulfate-reduced archaea: photosynthetic bacteria: rhodospirillum lutescens: rhodopseudomonas spheroids: nocardia: bacillus prodigiosus (Clostridium purpuricum): nitrate bacteria: an nitrite bacterium: bacillus subtilis: the mixing ratio of the corynebacteria is 1.5:1.0:2.5:1.5:5:2:1.5:3:2:3.0:4, and the ratio of the optimum strain after mixing to the ratio of the treated wastewater is 1.0: 5000.
Further, the chemical or pesticide wastewater biochemical effluent quality parameter COD is less than 300mg/L, B0D/COD is less than 0.25, and the optimal strain proportion is as follows:
halophilic archaea: sulfate-reduced archaea: photosynthetic bacteria: rhodospirillum lutescens: rhodopseudomonas spheroids: nocardia: bacillus prodigiosus (Clostridium purpuricum): nitrate bacteria: an nitrite bacterium: bacillus subtilis: the mixing ratio of the corynebacteria is 2.0:1.0:2.0:1.2:2: 2.5:1:5:5:1, and the ratio of the optimum strain after mixing to the ratio of the treated wastewater is 1.0: 4000.
In the third step, the activation domestication mode is that the optimal strain is mixed with sewage 65 percent and clean water 35 percent according to the corresponding proportion, the temperature is controlled to be 25-36 ℃, the PH is 7-8.5, and DO is more than 2.0mg/L for aeration reaction for 18 hours to complete the activation domestication.
In the third step, the optimal material and form of the biological carrier are determined as follows:
the best biological carrier for strain enrichment is as follows: the modified polyurethane, the plant fiber, the active coke and the polyethylene terephthalate (PET) are mixed according to the proportion of 6:2:1:1, and the microporous biological carrier filler is formed by double blasting of oxygen and hydrogen.
Compared with the prior art, the method for treating the biochemical tail end of the chemical or pesticide wastewater provided by the invention aims at the process of further treating the water quality after the biochemical treatment of the wastewater in the chemical and pesticide industry.
The invention relates to a latest wastewater biological treatment technology aiming at a further biochemical treatment process of sewage after biochemical treatment in chemical and pesticide industries, which is used for further analyzing the water quality after the existing wastewater treatment, screening the best strain and further treating the strain by combining with a biological filler, and can reduce the water quality by 50 percent or more on the basis of the existing biochemical effluent. The invention has obvious effect on the chemical and pesticide wastewater after biochemical treatment, reduces the operation cost for enterprises and has better environmental benefit.
Drawings
FIG. 1 is a schematic flow chart of a first embodiment of the method for treating biochemical tail end of chemical or pesticide wastewater according to the invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in 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.
Examples
As shown in fig. 1, a method for treating biochemical tail end of chemical or pesticide wastewater according to a first embodiment of the present invention includes:
step one, analyzing the water quality parameters of biochemical effluent of chemical or pesticide wastewater and the characteristics of residual pollutants in water quality;
step two, preparing an optimal strain according to the existence form of the pollutants in the biochemical effluent quality parameters of the chemical or pesticide wastewater;
step three, activating and domesticating the strains by using target water quality, and determining the optimal material and form of the biological carrier;
and step four, dynamically adding the activated and domesticated strains according to the water quality and water quantity of the incoming water.
In the first step, the chemical or pesticide wastewater biochemical effluent quality parameters comprise: COD, BOD/COD, salinity, PH and major pollutants.
In the first step, the characteristics of the water quality residual pollutants comprise:
generally, the COD of the chemical or pesticide wastewater after biochemical end treatment is less than 800mg/L, the BOD/COD is less than 0.25, the salt content is less than 8000mg/L, the ph is 7-8.5, and most of main pollutants are organic matters with a carbon molecular structure more than 5.
In the second step, the optimal strains comprise: halophilic archaea, sulfate-reducing archaea, photosynthetic bacteria, Rhodospirillum lutescens, Rhodopseudomonas sphaeroides Nocardia, Ganoderma (Clostridium purpuricum), nitrate and nitrite bacteria, Bacillus subtilis, and Corynebacterium.
Further, the water quality parameter COD of the biochemical effluent of the chemical or pesticide wastewater is 500-:
halophilic archaea: sulfate-reduced archaea: photosynthetic bacteria: rhodospirillum lutescens: rhodopseudomonas spheroids: nocardia: bacillus prodigiosus (Clostridium purpuricum): nitrate bacteria: an nitrite bacterium: bacillus subtilis: the mixing ratio of the corynebacteria is 1:1.2:1.5:1:2:1:1.6:1.2:2:3.5:5, and the ratio of the optimum strain after mixing to the ratio of the optimum strain after treating the wastewater is 1.8: 6000. Namely: the mixed bacteria weight of each 6000 tons of water which are mixed according to the proportion of the strains is 1.8kg, the strains require sewage of 65 percent and clear water of 35 percent, the temperature is controlled between 25 and 36 ℃, the PH is controlled between 7 and 8.5, and DO is more than 2.0mg/L, and the aeration reaction is carried out for 18 hours to complete the activation and domestication.
Further, the water quality parameter COD of the biochemical effluent of the chemical or pesticide wastewater is 500-300mg/L, B0D/COD is less than 0.25, and the optimal strain proportion is as follows:
halophilic archaea: sulfate-reduced archaea: photosynthetic bacteria: rhodospirillum lutescens: rhodopseudomonas spheroids: nocardia: bacillus prodigiosus (Clostridium purpuricum): nitrate bacteria: an nitrite bacterium: bacillus subtilis: the mixing ratio of the corynebacteria is 1.5:1.0:2.5:1.5:5:2:1.5:3:2:3.0:4, the ratio of the best strain after mixing to the ratio of the treated wastewater is 1.0:5000, namely: the mixed bacteria weight of every 5000 tons of water which is mixed according to the proportion of the strains is 1.0kg, the strains require sewage of 65 percent and clear water of 35 percent, the temperature is controlled between 25 and 36 ℃, the PH is controlled between 7 and 8.5, and DO is larger than 2.0mg/L, and the aeration reaction is carried out for 18 hours to complete the activation and domestication.
Further, the chemical or pesticide wastewater biochemical effluent quality parameter COD is less than 300mg/L, B0D/COD is less than 0.25, and the optimal strain proportion is as follows:
halophilic archaea: sulfate-reduced archaea: photosynthetic bacteria: rhodospirillum lutescens: rhodopseudomonas spheroids: nocardia: bacillus prodigiosus (Clostridium purpuricum): nitrate bacteria: an nitrite bacterium: bacillus subtilis: the mixing ratio of the corynebacteria is 2.0:1.0:2.0:1.2:2: 2.5:1:5:5:1, the ratio of the best strain after mixing to the ratio of the treated wastewater is 1.0:4000, namely: the mixed bacteria weight of every 4000 tons of water which is mixed according to the proportion of the strains is 1.0kg, the strains need sewage of 65 percent and clear water of 35 percent, the temperature is controlled between 25 and 36 ℃, the PH is controlled between 7 and 8.5, and DO is more than 2.0mg/L, and the aeration reaction is carried out for 18 hours to complete the activation and domestication.
The COD removal rate can be realized to be more than 50% by the process, and the application water quality is as follows: and (4) treating tail end wastewater after biochemical treatment in chemical industry or pesticide industry.
In the third step, the activation domestication mode is that the optimal strain is mixed with sewage 65 percent and clean water 35 percent according to the corresponding proportion, the temperature is controlled to be 25-36 ℃, the PH is 7-8.5, and DO is more than 2.0mg/L for aeration reaction for 18 hours to complete the activation domestication.
In the third step, the optimal material and form of the biological carrier are determined as follows:
the best biological carrier for strain enrichment is as follows: the modified polyurethane, the plant fiber, the active coke and the polyethylene terephthalate (PET) are mixed according to the proportion of 6:2:1:1, and the microporous biological carrier filler is formed by double blasting of oxygen and hydrogen.
The present invention is compared with the prior art as shown in table 1:
TABLE 1
The main existing forms of the residual pollutants in the effluent of the current biochemical system are analyzed, the biochemical effluent is adopted to further activate and domesticate microbial strains, and the optimal biological filler is determined to provide a good carrier for the added biological bacteria.
1. The technology effectively replaces a physicochemical treatment process at the biochemical rear end, and the effluent of a biochemical system can remove 50 percent or more of organic pollutants COD through the process.
2. The residual pollutants in the existing biochemical effluent are analyzed, and the waste water is adopted to carry out activator acclimation of the bacterial strains, so that more effective bacterial strains are obtained.
3. The concentration of the effective strain reaches 109/cm 2 or more after the enrichment of the biological carrier, and the activity is extremely high.
According to the embodiment I of the invention, the optimal strain composition is determined after the water quality analysis of the current biochemical effluent, including COD, salinity, PH and BOD, and main pollutants are analyzed, and strain enrichment is carried out through a special high-density filler according to the activation and further activation of the water quality on the specific strain, so that the pollutant removal capacity is improved, and the residual organic pollutants in the wastewater are decomposed to the maximum extent, so that the pollutants are removed.
Compared with the prior art, the method for treating the biochemical tail end of the chemical or pesticide wastewater can replace the traditional physicochemical treatment technology, and aims at the process for further treating the water quality after the biochemical treatment of the wastewater in the chemical and pesticide industry.
The invention relates to a latest wastewater biological treatment technology aiming at a further biochemical treatment process of sewage after biochemical treatment in chemical and pesticide industries, which is used for further analyzing the water quality after the existing wastewater treatment, screening the best strain and further treating the strain by combining with a biological filler, and can reduce the water quality by 50 percent or more on the basis of the existing biochemical effluent. The invention has obvious effect on the chemical and pesticide wastewater after biochemical treatment, reduces the operation cost for enterprises and has better environmental benefit.
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 conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within 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 (4)
1. A method for treating biochemical tail end of chemical or pesticide wastewater is characterized by comprising the following steps:
step one, analyzing the water quality parameters of biochemical effluent of chemical or pesticide wastewater and the characteristics of residual pollutants in water quality; wherein, the biochemical effluent quality parameters of the chemical or pesticide wastewater comprise: COD, BOD/COD, salinity, pH and major pollutants; the characteristics of the water quality residual pollutants comprise: COD of the chemical or pesticide wastewater after biochemical end treatment is less than 800mg/L, BOD/COD is below 0.25, salinity is less than 8000mg/L, pH is between 7 and 8.5, and main pollutants are organic matters with a carbon molecular structure more than 5;
step two, preparing an optimal strain according to the existence form of the pollutants in the biochemical effluent quality parameters of the chemical or pesticide wastewater; the best strains include: halophilic archaea, sulfate-reducing archaea, photosynthetic bacteria, Rhodospirillum lutescens, Rhodopseudomonas sphaeroides Nocardia, Ganoderma (Clostridium purpuricum), nitrate and nitrite bacteria, Bacillus subtilis, and Corynebacterium;
step three, activating and domesticating the strains by using target water quality, and determining the optimal material and form of the biological carrier; the activation domestication mode is that the optimal strain is mixed with sewage 65% and clear water 35% according to the corresponding proportion, the temperature is controlled between 25-36 ℃, the pH is controlled between 7-8.5, and DO is greater than 2.0mg/L for aeration reaction for 18 hours to complete the activation domestication; the optimal material and form of the biological carrier are determined as follows: the best biological carrier for strain enrichment is as follows: modified polyurethane, plant fiber, active coke and polyethylene terephthalate (PET) are mixed according to the proportion of 6:2:1:1, and the microporous biological carrier filler is formed by double blasting of oxygen and hydrogen;
and step four, dynamically adding the activated and domesticated strains according to the water quality and water quantity of the incoming water.
2. The method as claimed in claim 1, wherein the biochemical effluent quality parameter COD of the chemical or pesticide wastewater is 500-800mg/L, B0D/COD is less than 0.25, and the optimal strain ratio is as follows:
halophilic archaea: sulfate-reduced archaea: photosynthetic bacteria: rhodospirillum lutescens: rhodopseudomonas spheroids: nocardia: bacillus prodigiosus (Clostridium purpuricum): nitrate bacteria: an nitrite bacterium: bacillus subtilis: the mixing ratio of the corynebacteria is 1:1.2:1.5:1:2:1:1.6:1.2:2:3.5:5, and the ratio of the optimum strain after mixing to the ratio of the optimum strain after treating the wastewater is 1.8: 6000.
3. The method as claimed in claim 1, wherein the biochemical effluent quality parameter COD of the chemical or pesticide wastewater is 500-300mg/L, B0D/COD is less than 0.25, and the optimal strain ratio is as follows:
halophilic archaea: sulfate-reduced archaea: photosynthetic bacteria: rhodospirillum lutescens: rhodopseudomonas spheroids: nocardia: bacillus prodigiosus (Clostridium purpuricum): nitrate bacteria: an nitrite bacterium: bacillus subtilis: the mixing ratio of the corynebacteria is 1.5:1.0:2.5:1.5:5:2:1.5:3:2:3.0:4, and the ratio of the optimum strain after mixing to the ratio of the treated wastewater is 1.0: 5000.
4. The method of claim 1, wherein the chemical or pesticide wastewater biochemical effluent quality parameter COD is less than 300mg/L, B0D/COD is less than 0.25, and the optimal strain ratio is as follows:
halophilic archaea: sulfate-reduced archaea: photosynthetic bacteria: rhodospirillum lutescens: rhodopseudomonas spheroids: nocardia: bacillus prodigiosus (Clostridium purpuricum): nitrate bacteria: an nitrite bacterium: bacillus subtilis: the mixing ratio of the corynebacteria is 2.0:1.0:2.0:1.2:2: 2.5:1:5:5:1, and the ratio of the optimum strain after mixing to the ratio of the treated wastewater is 1.0: 4000.
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