CN106336082B - Method for treating wastewater from bactericide production - Google Patents
Method for treating wastewater from bactericide production Download PDFInfo
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- CN106336082B CN106336082B CN201610911474.0A CN201610911474A CN106336082B CN 106336082 B CN106336082 B CN 106336082B CN 201610911474 A CN201610911474 A CN 201610911474A CN 106336082 B CN106336082 B CN 106336082B
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/127—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering by centrifugation
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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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
- C02F2101/34—Organic compounds containing oxygen
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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
- C02F2101/38—Organic compounds containing nitrogen
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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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
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Abstract
The patent relates to a method for treating bactericide production wastewater, which comprises an ozone reactor, a wastewater tank, a primary biochemical tank, a secondary biochemical tank and a discharge water tank, wherein a biochemical treatment device adopts a biological strengthening technology. The biological strengthening technology comprises pseudomonas species screened from the bactericide wastewater raw water, a microorganism strengthening culture device and a matched culture medium. Through the effective combination of an ozone oxidation pretreatment system and a biological enhancement technology, residual bactericide components and refractory organic matters in the high-salinity wastewater are efficiently removed, and the stable standard-reaching discharge of the wastewater is realized at lower operation cost.
Description
Technical Field
The invention relates to the technical field of industrial wastewater treatment, in particular to a biological treatment method for bactericide production wastewater.
Background
BIT (1, 2-benzisothiazolin-3-one) is a novel industrial bactericide with broad spectrum, high efficiency, low toxicity and good water solubility, and has the outstanding effect of inhibiting the breeding of microorganisms such as fungi, mildew, bacteria, algae and the like in an organic medium, so the market prospect is very wide. However, the condensed washing water, the recycled wastewater and the finished product wastewater generated in the BIT production process have the characteristics of high BIT residual concentration, high chloride concentration, high COD concentration, high content of refractory organics and the like, and are very difficult to treat by an economic and effective biological method, so that the treatment can only be carried out by a physical and chemical method. For example, the Fenton process and the ozone oxidation process are adopted, the treatment cost is very expensive, secondary pollutants are generated, and enterprises are difficult to bear.
Disclosure of Invention
The invention aims to provide a biological treatment method of bactericide production wastewater, which has good effect of treating the bactericide production wastewater, simple operation and strong practicability.
The technical scheme is as follows:
a biological treatment method for the waste water generated in the production of bactericide features that its apparatus is composed of ozone reactor, waste water pool, primary biochemical pool, the first settling pool, the secondary biochemical pool, the second settling pool, water draining pool, sludge concentrating pool, biological intensified culture unit and centrifugal dewatering machine.
1. The concentration of the activated sludge in the primary biochemical tank is 3000-8000mg/L, the temperature is 15-39 ℃, the PH value is 6-9, and the DO is 2-6 mg/L.
The sludge reflux ratio is 300 percent(ii) a The sludge concentration in the secondary biochemical pond is 2000-4000mg/L, the temperature is 15-39 ℃, the PH value is 6-9, the DO is 2-4 mg/L,
the sludge reflux ratio is 100-300 percent;
the primary biochemical pool and the secondary biochemical pool are inoculated with pseudomonas at one time in the debugging stage according to the volume of the biochemical pool being 3400m
3The pseudomonas is added at one time, 2000ppm, and the pseudomonas is not added in daily operation. The concentration of the effective insecticide ingredient tolerated by the Pseudomonas species was 40mg/L and the total soluble solids tolerated was 25000 mg/L. The pseudomonas is screened from the bactericide production wastewater.
The biological strengthening culture device is internally provided with culture mediums for pseudomonas and is respectively connected with the feed inlets of the first-stage biochemical tank and the second-stage biochemical tank through pipelines. An aeration generator is arranged in the biological strengthening device and emits strong micro bubbles, namely, the biological strengthening device has an aeration function. The bioaugmentation device is provided with a temperature controller which automatically controls the temperature in the bioaugmentation device and is suitable for the survival and the propagation of pseudomonas species. The operation is usually carried out for 1 to 2 times per week, the mixed liquid in the biochemical pool is led to a culture tank by a self-contained pump in each operation, a matched culture medium is added, the culture is cultured for about 20 hours under the conditions of 30 to 33 ℃ and dissolved oxygen, and then the culture liquid is discharged into an aeration tank by the self-contained pump, so as to maintain the quantity and the activity of pseudomonas species in the biochemical pool;
2. the bactericide production wastewater firstly enters an ozone reactor, ozone generated by the ozone generator is introduced into the ozone reactor, residual effective bactericide components in the bactericide production wastewater are oxidized and decomposed by the ozone, and the concentration of the residual effective bactericide components is ensured to be below 40 mg/l. The wastewater treated by the ozone flows out of a liquid outlet of the ozone generator and enters a wastewater tank, and the water flow and the water quality are adjusted in the wastewater tank. Introducing low-salt dilution water, and controlling the total dissolved solid concentration of the wastewater to be 23000-26000 mg/L.
3. And (3) inputting the wastewater with the flow regulated in the wastewater tank into a primary biochemical tank through a pipeline, adding a pseudomonad nutrient, HN100, and adding the pseudomonad nutrient according to 40ppm of inflow. The wastewater is in the primary biochemical tank, and the organic matters are rapidly decomposed into CO2 and water through the biological oxidation of microorganisms. The wastewater flows into the first sedimentation tank from the first-stage biochemical tank through a pipeline for sedimentation, the separated supernatant is sent into the second-stage biochemical tank through a pipeline, part of the precipitated sludge flows back to the first-stage biochemical tank, and the rest sludge with the sludge concentration reaching 3000-plus 8000mg/L in the first-stage biochemical tank enters the sludge concentration tank. The waste water is subjected to biochemical reaction in the secondary biochemical tank, and organic matters which are not treated in the primary biological tank are subjected to biological oxidation through the metabolism of pseudomonas species in the secondary biochemical tank to be decomposed into CO2 and water. And the sludge-water mixed liquor in the secondary biochemical tank enters a second sedimentation tank through a pipeline for sedimentation, the supernatant after sedimentation enters a discharge water tank through a pipeline, part of the precipitated sludge flows back to the secondary biochemical tank, the sludge concentration in the secondary biochemical tank is kept at 2000-4000mg/L, and the rest sludge is sent to a sludge concentration tank, and the sludge in the sludge concentration tank is dehydrated by a centrifugal machine to be prepared into a sludge cake with the water content of 80% for outward transportation.
The invention has the advantages that:
the method effectively combines an ozone oxidation pretreatment system and a biological enhancement technology, efficiently removes residual bactericide components and refractory organic matters in the high-salinity wastewater, and realizes stable standard discharge with lower operation cost. The equipment used by the method has simple structure, convenient operation and strong practicability. The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any minor modifications, equivalent changes and modifications made according to the technical spirit of the present invention are within the technical scope of the present invention.
Drawings
FIG. 1 is a process flow diagram of one embodiment of the present invention.
The specific implementation mode is as follows:
the equipment used in the method comprises an ozone reactor, a wastewater tank, a primary biochemical tank, a first sedimentation tank, a secondary biochemical tank, a second sedimentation tank, a drainage tank, a sludge concentration tank, a biological strengthening culture device and a centrifugal dehydrator.
The bactericide production wastewater treatment comprises the following specific steps:
1. briefly introduce the selection and culture of strains for biological treatment:
the strain for biological treatment is pseudomonas screened from pesticide production wastewater.
The dominant microorganism screening method implemented by modern biotechnology means comprises the following steps:
1) concentration of the dominant microorganism
The strain concentration equipment is utilized, and the strain is concentrated under the conditions that a carbon source and an inorganic mineral medium in raw water are used as substrates, the PH6-9 value and the dissolved oxygen concentration.
In general, the strain is concentrated by more than three stages, i.e., concentrated by more than three stages, to obtain the high-purity strain.
2) Pure culture of dominant microorganisms
And (3) screening dominant microorganisms with high-efficiency decomposition efficiency on target organic matters from the concentrated strains and carrying out pure culture.
3) Evaluation of Primary decomposition Capacity for screening dominant microorganisms
Solid inorganic media SKYCLEAN401 and SKYCLEAN402 were added, SKYCLEAN401 being a mixture of alanine, arginine and asparagine, and SKYCLEAN402 being an inorganic phosphate. The ratio of the two inorganic nutrient media is 1-3: 1. Both inorganic nutritional bases are commercially known products. The primary decomposition ability evaluation was performed on the pure cultured dominant microorganisms.
4) The qualitative analysis of the dominant microorganisms evaluated by the primary decomposition ability accurately characterizes the genus of the dominant microorganisms, and judges whether the microorganisms are pathogenic bacteria.
5) Preparation of special culture medium
Based on the qualitative results for the dominant microorganisms, a targeted medium was formulated.
6) Evaluation of Activity of dominant microorganism
7) Preservation of dominant microorganisms
And (4) performing cryopreservation on the finally screened microorganisms.
8) Expanding culture
Activating the superior microorganisms stored in a freezing way according to the needs, expanding and packaging the superior microorganisms by utilizing a known professional culture device and a specific culture medium, and supplying the superior microorganisms to customers.
The screening process for the dominant microorganisms described above takes 75 to 90 days.
2. The concentration of the activated sludge in the primary biochemical tank is 3000-4500mg/L, the temperature is 15-39 ℃, the pH value is 6-9, and the DO is 2-6 mg/L.
The sludge reflux ratio is 300 percent(ii) a The sludge concentration in the secondary biochemical pond is 2000-3000mg/L, the temperature is 15-30 ℃, the PH value is 6-9, the DO is 2-4 mg/L,
the sludge reflux ratio is 100-300 percent;
the sludge concentration in the secondary biochemical pond is 2000-4000mg/L, the temperature is 15-39 ℃, the PH value is 6-9, the DO is 2-4 mg/L,
the sludge reflux ratio is 300 percent；
The primary biochemical pool and the secondary biochemical pool are inoculated with pseudomonas at one time in the debugging stage, the pseudomonas is added at one time according to the volume of the biochemical pool, 2000ppm of the pseudomonas is added, and the pseudomonas is not added in the daily operation. The concentration of the effective insecticide ingredient tolerated by the Pseudomonas species was 400mg/L and the total soluble solids tolerated was 25000 mg/L.
The biological strengthening culture device is internally provided with culture mediums for pseudomonas and is respectively connected with the feed inlets of the first-stage biochemical tank and the second-stage biochemical tank through pipelines. An aeration generator is arranged in the biological strengthening device and emits strong micro bubbles, namely, the biological strengthening device has an aeration function. The bioaugmentation device is provided with a temperature controller which automatically controls the temperature in the bioaugmentation device and is suitable for the survival and the propagation of pseudomonas species. Generally, the operation is carried out for 1-2 times per week, the mixed liquid in the biochemical pool is introduced into a culture tank by a self-contained pump during each operation, a proper amount of matched culture medium is added, the mixed liquid is cultured for about 20 hours at the temperature of 30-33 ℃ under the condition of dissolved oxygen, and then the culture liquid is discharged into an aeration tank by the self-contained pump, so as to maintain the quantity and the activity of specific strains in the biochemical pool;
3. the bactericide production wastewater firstly enters an ozone reactor, ozone generated by the ozone generator is introduced into the ozone reactor, residual effective bactericide components in the bactericide production wastewater are oxidized and decomposed by the ozone, and the concentration of the residual effective bactericide components is ensured to be below 40 mg/l. The wastewater treated by the ozone flows out of a liquid outlet of the ozone generator and enters a wastewater tank, and the water flow and the water quality are adjusted in the wastewater tank. Introducing low-salt dilution water, and controlling the total dissolved solid concentration of the wastewater to be 23000-25000 mg/L.
4. And (3) inputting the wastewater with the flow regulated in the wastewater tank into a primary biochemical tank through a pipeline, wherein the pseudomonas nutrient HN100 is added according to 40ppm of inflow. The wastewater is in the primary biochemical tank, and the organic matters are rapidly decomposed into CO2 and water through the biological oxidation of microorganisms. The wastewater flows into the first sedimentation tank through a pipeline to be sedimentated, the separated supernatant is sent into the second-level biochemical tank through a pipeline, and a part of the sedimentated sludge flows back to the first-level biochemical tank, so that the residual sludge with the sludge concentration of 3000-4500mg/L in the first-level biochemical tank enters the sludge concentration tank. The waste water is subjected to biochemical reaction in the secondary biochemical tank, and organic matters which are not treated in the primary biological tank are subjected to biological oxidation through the metabolism of pseudomonas species in the secondary biochemical tank to be decomposed into CO2 and water. And the sludge-water mixed liquor in the secondary biochemical tank enters a second sedimentation tank through a pipeline for sedimentation, the supernatant after sedimentation enters a discharge water tank through a pipeline, part of the precipitated sludge flows back to the secondary biochemical tank, the sludge concentration in the secondary biochemical tank is kept at 2000-3000mg/L, and the rest sludge is sent to a sludge concentration tank, and the sludge in the sludge concentration tank is dehydrated by a centrifugal machine to be prepared into a sludge cake with the water content of 80% for outward transportation.
Claims (1)
1. A method for treating wastewater generated in bactericide production uses equipment comprising an ozone reactor, a wastewater tank, a primary biochemical tank, a first sedimentation tank, a secondary biochemical tank, a second sedimentation tank, a drainage tank, a sludge concentration tank, a biological strengthening culture device and a centrifugal dehydrator;
1) the concentration of the activated sludge in the primary biochemical tank is 3000-8000mg/L, the temperature is 15-39 ℃, the pH value is 6-9, and the DO is 2-6 mg/L; the sludge reflux ratio is 100-300 percent; the sludge concentration in the secondary biochemical pond is 2000-4000mg/L, the temperature is 15-39 ℃, the pH value is 6-9, the DO is 2-4 mg/L, and the sludge reflux ratio is 100-300 percent;
the primary biochemical pool and the secondary biochemical pool are inoculated with pseudomonas at one time in the debugging stage according to the volume of the biochemical pool being 3400m
32000ppm of pseudomonas is added at one time, the pseudomonas is not added in daily operation, the concentration of the effective insecticide component tolerated by pseudomonas species is 40mg/L, and the concentration of the tolerated total dissolved solid is 25000 mg/L;
the biological intensified culture device is internally provided with culture mediums SKYCLEAN401 and SKYCLEAN402 for pseudomonas and pseudomonas, and is respectively connected with the feed inlets of the primary biochemical tank and the secondary biochemical tank through pipelines; an aeration generator is arranged in the biological enhanced culture device to emit strong micro bubbles, the biological enhanced culture device is provided with a temperature controller to automatically control the temperature in the biological enhanced culture device to be 30-33 ℃, and the biological enhanced culture device is suitable for the survival and propagation of pseudomonas species; the operation is usually carried out for 1 to 2 times per week, the mixed solution in the biochemical tank is led to a culture tank by a self-contained pump during each operation, a matched culture medium is added, and the culture solution is discharged into an aeration tank by the self-contained pump after being cultured for about 20 hours at the temperature of 30 to 33 ℃ under the condition of dissolved oxygen;
2) the method comprises the following steps of (1) introducing the bactericide production wastewater into an ozone reactor, introducing ozone generated by an ozone generator into the ozone reactor, and oxidizing and decomposing residual effective bactericide components in the bactericide production wastewater by using the ozone to ensure that the concentration of the residual effective bactericide components is below 40 mg/l; the wastewater treated by the ozone flows out of a liquid outlet of the ozone generator and enters a wastewater tank, and the water flow and the water quality are adjusted in the wastewater tank; introducing low-salt dilution water, and controlling the concentration of total soluble solids of the wastewater to be 23000-26000 mg/L;
3) the wastewater after the flow of the wastewater pool is regulated is input into a first-stage biochemical pool through a pipeline, wherein the wastewater is put intoAdding a pseudomonas nutrient HN100 according to 40ppm of inflow amount; the wastewater quickly decomposes organic matters into CO through the biological oxidation of microorganisms in a primary biochemical tank
2And water; the wastewater flows into the first sedimentation tank from the primary biochemical tank through a pipeline for sedimentation, the separated supernatant is sent into the secondary biochemical tank through a pipeline, part of the precipitated sludge flows back to the primary biochemical tank, so that the sludge concentration in the primary biochemical tank reaches 3000-plus 4500mg/L, and the rest sludge enters a sludge concentration tank; the waste water is subjected to biochemical reaction in the secondary biochemical tank, and organic matters which are not treated in the primary biological tank are subjected to biological oxidation to be decomposed into CO through the metabolism of pseudomonas species in the secondary biochemical tank
2And water; and the sludge-water mixed liquor in the secondary biochemical tank enters a second sedimentation tank through a pipeline for sedimentation, the supernatant after sedimentation enters a discharge water tank through a pipeline, part of the precipitated sludge flows back to the secondary biochemical tank, the sludge concentration in the secondary biochemical tank is kept at 3000mg/L, and the rest sludge is sent to a sludge concentration tank and is dehydrated by a centrifugal machine to be prepared into sludge cakes for outward transportation.
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| CN110395827B (en) * | 2019-07-01 | 2021-08-31 | 绍兴市上虞三维化工有限公司 | BIT production wastewater treatment process and treatment system thereof |
| CN114084965B (en) * | 2020-08-24 | 2023-01-03 | 中国石油化工股份有限公司 | Oil refining wastewater biological treatment agent and use method thereof |
| CN115304207A (en) * | 2021-05-06 | 2022-11-08 | 河北邯钢冷轧薄板有限公司 | Biochemical pond constant temperature system of sewage treatment system |
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| CN102409009B (en) * | 2011-09-19 | 2012-12-19 | 北京大学 | Pseudomonas and application thereof in carbazole degradation |
| CN102424806A (en) * | 2011-12-15 | 2012-04-25 | 哈尔滨师范大学 | DDT (dichlorodiphenyltrichloroethane)-degrading pseudomonad strain |
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