CN104926028A - Comprehensive utilization and treatment recycling method for semi-coke wastewater resources - Google Patents
Comprehensive utilization and treatment recycling method for semi-coke wastewater resources Download PDFInfo
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Abstract
The invention discloses a comprehensive utilization and treatment recycling method for semi-coke wastewater resources. The method comprises the steps of (1) coarse filtration; (2) emulsion breaking; (3) tar recycling; (4) phenol recycling; (5) ammonia recycling; (6) oxidization; (7) anaerobic treatment; (8) aerobic treatment; (9) electrolyzation; (10) secondary anaerobic treatment; (11) membrane treatment with an MBR (membrane bioreactor) or biochemical reaction with a biological aerated filter; (12) desalination. According to the method, semi-coke wastewater is deeply treated by a combined treatment process comprising the processes of emulsion breaking, coal tar recycling, dephenolization, deamination, oxidization, anaerobic treatment, aerobic treatment, electrolyzation and the like, and is finally desalinated to generate recycled water, so that the wastewater is completely treated to eliminate wastewater pollution, and moreover, the wastewater is recycled to realize the recycling of water resources.
Description
Technical field
The invention belongs to the field for the treatment of of water pollution of environmental engineering, more specifically refer to a kind of blue charcoal waste water resource comprehensive utilization and treatment cyclic utilization method.
Background technology
Blue charcoal waste water is the trade effluent that a kind of intractability is larger, usually has the features such as complicated component, Pollutant levels are high, stable in properties.Inorganic pollutant in blue charcoal waste water mainly contains sulfide, prussiate, ammonia nitrogen and thiocyanide etc.; Organic pollutant is based on coal tar oily substance, and the content of phenolic compound is very high, in addition, and the aromatics also containing many rings and nitrogenous, sulphur, oxygen heterogeneous ring compound etc.
The water quality characteristics of blue charcoal waste water determines the hazardness of its complexity.Such as, wherein there is grave danger to ecotope in contained ammonia nitrogen, phenolic compound and aromatics.In addition, the industry byproduct such as coal tar, ammonia, phenol in blue charcoal waste water also has the value of recycling.
Summary of the invention
The invention provides a kind of blue charcoal waste water resource comprehensive utilization and treatment cyclic utilization method, its main purpose is to overcome the inadequate technical deficiency of the existing blue charcoal wastewater treatment degree of depth, and the shortcoming such as the technology vacancy simultaneously reclaiming tar, ammonia and phenol in blue charcoal waste water.
The present invention adopts following technical scheme:
A kind of blue charcoal waste water resource comprehensive utilization and treatment cyclic utilization method comprises the following steps:
(1) coarse filtration: be 10000 ~ 75000mg/L by COD, ammonia nitrogen be 500 ~ 5000mg/L, total phenol is 1000 ~ 10000mg/L, colourity is 1000 ~ 3000 times, pH value be 8 ~ 10 blue charcoal waste water carry out coarse filtration through grid or screen cloth, removing macrobead foreign material;
(2) breakdown of emulsion: the blue charcoal waste water that step (1) coarse filtration must be removed macrobead thing adds acid and regulates its pH value to 2 ~ 6, destroys the emulsion of coal tar and water, coal tar is separated out;
(3) coal tar oil recovery: by the waste water after step (2) breakdown of emulsion through gravity settling separation or centrifugation, what obtain recovery obtains 10 ~ 40kg/m
3coal tar and the blue charcoal waste water of detar, the clearance of blue charcoal waste water COD reaches 30 ~ 55%;
(4) recovery of phenol: the detar waste water of step (3) coal tar oil recovery gained adds extraction agent extracting and separating and obtains 1 ~ 6kg/m
3crude phenols and the blue charcoal waste water of dephenolize, COD clearance reaches 10 ~ 35%;
(5) recovery ammonia: the blue charcoal waste water of step (4) dephenolize adds alkaline solution and regulates its pH to 10 ~ 12, heating evaporation removing ammonia, ammonia absorbs through persulfate solution to be produced ammonium sulfate or obtains liquefied ammonia and the blue charcoal waste water of deamination through cooling liquid, the removal of ammonia reaches more than 99%, the COD of blue charcoal waste water drops to 2000 ~ 4500mg/L, and ammonia nitrogen drops to below 80mg/L;
(6) be oxidized: blast air by blue for the deamination of step (5) recovery ammonia gained charcoal waste water, make remaining phenol be oxidized to quinone, reduce phenol and the generation of subsequent treatment process microorganism is poisoned;
(7) anaerobic treatment: the blue charcoal waste water of step (6) oxidation gained is added solution and regulates its pH value to 6 ~ 9, anaerobic pond is entered through lift pump, in anaerobic pond, under anerobe, the hold concurrently absorption of oxygen bacterium, fermentation, methane phase acting in conjunction, organic acid is resolved into methane and carbon dioxide, improved B/C value and the removing most COD of waste water by anaerobic treatment, improve the biodegradability of waste water;
(8) aerobic treatment: charcoal waste water blue after step (7) anaerobic treatment is entered Aerobic Pond and intermediate sedimentation pond through lift pump, and the partial sludge in intermediate sedimentation pond is back to Aerobic Pond by reflux pump, by the organism in the blue charcoal waste water of the further oxygenolysis of aerobic treatment, the degree of depth removes COD and BOD; Evenly fill up a large amount of biological suspended packings in Aerobic Pond, perch for aerobic microbiological provides, the place of growth and breeding so that microorganism forms microbial film at filling surface.Aeration aerating stirring system is provided with bottom Aerobic Pond, oxygenation is carried out to sewage, the dissolved oxygen in water is made to maintain 2 ~ 4 mg/L, utilize the effect that gas rises simultaneously, suspended substance in pond is more fully contacted with water, additionally by the agitaion of gas and clear water back flushing, can effectively wash away the aging microbial film of filling surface growth, impel biomembranous update, make the activity that microbial film remains higher;
(9) electrolysis: charcoal waste water blue after step (8) aerobic treatment is entered electrolysis machine and carries out electrolysis, with decolouring and deodorizing, make difficulty in waste water biochemical macromolecular cpd open loop chain rupture simultaneously, become can be biochemical small molecules, further raising B/C value, improves the condition of subsequent biochemical process; The adjacent two interelectrode voltages of electrolysis machine are 2 ~ 12V, and current density is 10 ~ 320mA/cm
2;
(10) secondary anaerobic treatment: the blue charcoal waste water of step (9) electrolysis gained is entered secondary anaerobic pond through lift pump, in anaerobic pond, under anerobe, the hold concurrently absorption of oxygen bacterium, fermentation, methane phase acting in conjunction, organic acid is resolved into methane and carbon dioxide, improve the B/C value of waste water by anaerobic treatment and remove most COD further, improving the biodegradability of waste water;
(11) process of MBR film or BAF biochemistry (BAF is biochemical): the blue charcoal waste water after step (10) secondary anaerobic treatment enters MBR membrane treatment appts or BAF, by the filtering separation of MBR membrane treatment appts or BAF and oxidation degradation effect, waste water is purified, further removing COD, SS and ammonia nitrogen, be purified waste water;
(12) desalination: the waste water after step (11) MBR film process or BAF biochemistry (BAF is biochemical) enters desalting plant, be separated to obtain water-dialyzing and condensed water, water-dialyzing enters reuse water basin, and condensed water then enters evaporative crystallization pond through discharge channel discharge and carries out crystallization treatment; Described desalting plant can be the one of reverse osmosis system, nanofiltration system, electrodialysis or capacitive adsorption deionizing system.
Acid described in step (2) breakdown of emulsion is the one in sulfuric acid, nitric acid, hydrochloric acid or phosphoric acid, and optimum is sulfuric acid, is mixed with the solution of 10 ~ 20% during use.
Gravity settling separation described in step (3) coal tar oil recovery will pump in gravity settling basin through the blue charcoal waste water of step (2) breakdown of emulsion gained, be the coal tar of lower floor and the decoking waste water on upper strata through gravity settling separation, the coal tar of lower floor reclaims through recovery tube.
Step (3) coal tar oil recovery can reclaim the tar (bituminous) of 10 ~ 40kg from every cube of Milan waste water, makes the COD of blue charcoal waste water decline more than 50%.
Centrifugation described in step (3) coal tar oil recovery will pump in whizzer through the blue charcoal waste water of step (2) breakdown of emulsion gained, and be the coal tar of lower floor and the decoking waste water on upper strata through centrifugation, the coal tar of lower floor reclaims through recovery tube; The centrifugal force of centrifugation is 2200 ~ 4000;
The Optimal pH be separated is 3 ~ 5, significantly can reduce the consumption of acid.
The best centrifugal force be separated is 3200 ~ 3600;
Extraction extraction agent used described in step (4) phenol reclaims is kerosene, mibk, N, N
,-dimethyl-g yl acetamide (N, N
,-503), the one of tributyl phosphate, isopropyl ether, N-BUTYL ACETATE or crude benzol or its mixture;
Optimum extractant is N, N
,-dimethyl-g yl acetamide (N, N
,-503) and the mixture of kerosene;
Optimum extractant is the mixture of tributyl phosphate and kerosene.
Step (4) phenol reclaims the crude phenols that can reclaim 1 ~ 6kg from every cube of Milan waste water, and the COD of blue charcoal waste water can be made to decline more than 10 ~ 35%.
The recovery ammonia of step (5) is that the blue charcoal waste water after the recovery of step (4) phenol adds alkaline solution and regulates its pH to 10 ~ 12, heating evaporation 6 ~ 12 minutes removing ammonias, ammonia absorbs through persulfate solution to be produced ammonium sulfate or obtains liquefied ammonia and the blue charcoal waste water of deamination through cooling liquid, and the removal of ammonia reaches more than 99%.
Alkaline solution described in step (5) recovery ammonia is the one of 10 ~ 20% sodium hydroxide, potassium hydroxide or sodium carbonate solution.
The principal pollutant index of the blue charcoal waste water after step (5) recovery ammonia: COD is 2000 ~ 4500 mg/L, and ammonia nitrogen is less than 80 mg/L, and phenol is less than 400 mg/L, and colourity is less than 500 times.
A desulfurized step is also had after step (5) recovery ammonia, ferrous sulfate is added by the blue charcoal waste water after recovery ammonia, the negative sulfidion in waste water and iron ion is made to generate to precipitate and remove, prevent sulfide to the murder by poisoning of biochemistry, improve its biochemical effects, after desulfurization, the COD of blue charcoal waste water declines 10 ~ 20%.
Electrolysis machine described in step (9) electrolysis is provided with power supply and electrolyzer, and the electrode materials in electrolyzer is the one in graphite, titanium, iron, aluminium, zinc, copper, lead, nickel, molybdenum, chromium, alloy or nano-catalytic inert material.
The membrane module of the described MBR device of step (11) is selected from the one in Pvdf Microporous Hollow Fiber Membrane, polypropylene hollow fiber membrane, ps hollow fiber uf membrane, polyethersulfone, polyacrylonitrile and PVC hollow fiber membrane, membrane pore size is 0.10 ~ 0.2 μm, operating pressure is-1 ~-50kPa, and working temperature is 5 ~ 45 DEG C.
The reverse osmosis membrane assembly of the reverse osmosis system described in step (12) desalination is rolled membrane module, mould material is cellulose acetate film or composite membrane in organic membrane, the molecular weight cut-off of mould material is 50 ~ 200MWCO, and entrance pressure can be 6.0 ~ 45.0bar, goes out pressure and can be 4.5 ~ 33.5 bar.
Nanofiltration membrane component in nanofiltration system described in step (12) desalination is the one of tubular membrane component, rolled membrane module or plate film assembly, and operating pressure is 6 ~ 45bar, and working temperature is 20 ~ 45 DEG C, and optimum temps is 35 ~ 40 DEG C.
The working conditions of the electrodialysis system described in step (12) desalination is operating voltage pressure 0.5 ~ 3.0 kg/cm
2, operating voltage 50 ~ 250V, strength of current 1 ~ 3A.
The working conditions of the capacitive adsorption deionizing system described in step (12) desalination is volts DS is 110V ~ 2 × 10
6v.
After step (12) desalination, gained reuse water water quality meets the reuse water water-quality guideline as table 1.
Table 1 reuse water water-quality guideline
| Sequence number | Project | Unit | Measured value | Sequence number | Project | Unit | Measured value |
| 1 | COD Cr | mg/L | 10 | 4 | Colourity | Doubly | 4 |
| 2 | SS | mg/L | Must not detect | 5 | Ca | mg/L | ≤1 |
| 3 | Specific conductivity | μS/cm | 120 | 6 | Hardness | mmol/L | 0.1 |
Compared to the prior art, tool has the following advantages in the present invention:
One, in waste water, resource reclaim comprehensive utilization degree is high, and the main useful resources tar of blue charcoal waste water, phenol and ammonia all achieve recycling.
(1) by the recycling step through overregulating pH breakdown of emulsion and coal tar, being not only stripped of the tar in waste water, the COD of waste water being reduced by more than 50%, is conducive to next step process, and tar 10 ~ 40kg/m can be reclaimed
3, achieve the recycling of tar resource, create new value, significantly can also reduce the consumption of alkali during follow-up recovery ammonia simultaneously.
(2) tar reclaims the blue charcoal waste water of gained by extracting and separating, not only eliminates the COD of in waste water 15 ~ 35% further, and can reclaim 1 ~ 6 kg/m from waste water
3phenol, achieve process and the recycling of blue charcoal Phenol for Waste Water.
(3) through overregulating pH, heating evaporation removes ammonia, not only realizes process and the recycling of blue charcoal ammonia in wastewater, and makes the COD of blue charcoal waste water drop to 2000 ~ 4500 mg/L.
Two, not only realize whole process of waste water, eliminate contaminated wastewater, and waste water reclamation is achieved the recycle of water resources.
By the combined treatment process of the processes such as coal tar recovering, dephenolize, deamination, desulfurization, oxidation, aerobic treatment, anaerobic treatment, electrolysis, carry out the advanced treatment of blue charcoal waste water, eventually pass through desalination and generate reuse water, realize the recycle of decontamination and water resources.
Accompanying drawing explanation
Fig. 1 is process flow sheet of the present invention.
Embodiment
Referring to Fig. 1, the specific embodiment of the present invention is described.
The present invention is based on the composition of blue charcoal waste water, character and existing processing scheme, devise a kind of blue charcoal waste water resource comprehensive utilization and treatment cyclic utilization method, it relates to the combined treatment process of the processes such as breakdown of emulsion, coal tar recovering, dephenolize, deamination, oxidation, anaerobic treatment, aerobic treatment, electrolysis, thus forms a kind of method that effectively can realize blue charcoal Sewage advanced treatment and recycling.
embodiment 1
Certain blue charcoal waste water resource comprehensive utilization and treatment recycling utilization embodiment.
(1) coarse filtration: be 10000mg/L by COD, ammonia nitrogen be 500mg/L, total phenol is 1000mg/L, colourity is 10000 times, pH value be 8 blue charcoal waste water carry out coarse filtration through grid or screen cloth, removing macrobead foreign material.
(2) breakdown of emulsion: the blue charcoal waste water that step (1) coarse filtration must be removed macrobead thing adds acid and regulates its pH to 2 ~ 5, destroys the emulsion of coal tar and water, coal tar is separated out.
Acid used is the one in sulfuric acid, nitric acid, hydrochloric acid, and optimum is sulfuric acid.
(3) coal tar oil recovery: that must be reclaimed through gravity settling separation by the waste water after step (2) breakdown of emulsion obtains coal tar and detar waste water.
Described gravity settling separation is that the blue charcoal waste water through step (2) breakdown of emulsion is put into gravity settling basin, and be the coal tar of lower floor and the decoking waste water on upper strata through gravity settling separation, the coal tar of lower floor reclaims through recovery tube.
Through breakdown of emulsion and gravity separation, the tar (bituminous) of 10kg can be reclaimed from every cube of Milan charcoal waste water.
After described tar reclaims, the COD of waste water is 8415mg/L, and ammonia nitrogen is 539mg/L, total phenol is 1096mg/L, colourity is 500 times.
(4) phenol reclaims: the blue charcoal waste water of the detar after being reclaimed by step (3) tar adds extraction agent extracting and separating and obtains crude phenols and the blue charcoal waste water of dephenolize.
Described extraction agent is kerosene and N, N
,-dimethyl-g yl acetamide (N, N
,-503) mixture.
Described phenol reclaims and also comprises from kerosene and N, N
,-dimethyl-g yl acetamide (N, N
,-503) strip with 10% sodium hydroxide solution in mixture and reclaim crude phenols, from every cube of Milan charcoal waste water, reclaim the crude phenols of 1kg.
The COD of the blue charcoal waste water of described dephenolize is 6011mg/L, and ammonia nitrogen is 596mg/L, total phenol is 99mg/L, colourity is 500 times.
(5) recovery ammonia: the sodium hydroxide solution that the blue charcoal waste water of dephenolize of step (4) phenol recovery gained adds 10% is regulated its pH to 10 ~ 11, heating evaporation 9 ~ 10 minutes, removing ammonia, ammonia absorbs through persulfate solution to be produced ammonium sulfate or obtains liquefied ammonia and the blue charcoal waste water of deamination through cooling liquid.
After described deamination, the pollutent index of blue charcoal waste water: COD is 3665mg/L, and ammonia nitrogen is 60.1mg/L, total phenol is 200.5mg/L, colourity is 500 times.
(6) be oxidized: blast air by blue for the deamination of step (5) recovery ammonia gained charcoal waste water, make remaining phenol be oxidized to quinone, reduce phenol and the generation of subsequent treatment process microorganism is poisoned.
(7) anaerobic treatment: the blue charcoal waste water of step (6) oxidation gained is added alkaline solution and regulates its pH value to 6 ~ 9, anaerobic pond is entered through lift pump, in anaerobic pond, under anerobe, the hold concurrently absorption of oxygen bacterium, fermentation, methane phase acting in conjunction, organic acid is resolved into methane and carbon dioxide, improved B/C value and the removing most COD of waste water by anaerobic treatment, improve the biodegradability of waste water.
The pollutent index of the described blue charcoal waste water through anaerobic treatment is: COD is 830mg/L, and ammonia nitrogen is 49mg/L, total phenol is 10mg/L, colourity is 150 times.
(8) aerobic treatment: charcoal waste water blue after step (7) anaerobic treatment is entered Aerobic Pond and intermediate sedimentation pond through lift pump, and the partial sludge in intermediate sedimentation pond is back to Aerobic Pond by reflux pump, by the organism in the blue charcoal waste water of the further oxygenolysis of aerobic treatment, the degree of depth removes COD and BOD; Evenly fill up a large amount of biological suspended packings in Aerobic Pond, perch for aerobic microbiological provides, the place of growth and breeding so that microorganism forms microbial film at filling surface.Aeration aerating stirring system is provided with bottom Aerobic Pond, oxygenation is carried out to sewage, the dissolved oxygen in water is made to maintain 2 ~ 4 mg/L, utilize the effect that gas rises simultaneously, suspended substance in pond is more fully contacted with water, additionally by the agitaion of gas and clear water back flushing, can effectively wash away the aging microbial film of filling surface growth, impel biomembranous update, make the activity that microbial film remains higher.
The pollutent index of the described blue charcoal waste water through aerobic treatment: COD is 352mg/L, ammonia nitrogen is 26mg/L, total phenol is 1mg/L, colourity is 150 times.
(9) electrolysis: charcoal waste water blue after step (8) aerobic treatment is entered electrolysis machine and carries out electrolysis, with decolouring and deodorizing, make difficulty in waste water biochemical macromolecular cpd open loop chain rupture simultaneously, become can be biochemical small molecules, further raising B/C value, improves the condition of subsequent biochemical process; The adjacent two interelectrode voltages of electrolysis machine are 2 ~ 12V, and current density is 10 ~ 320mA/cm
2.
Described electrolysis machine is provided with power supply and electrolyzer, and the electrode materials in electrolyzer is the one in graphite, titanium, iron, aluminium, zinc, copper, lead, nickel, molybdenum, chromium, alloy or nano-catalytic inert material.
(10) secondary anaerobic treatment: the blue charcoal waste water of step (9) electrolysis gained is entered secondary anaerobic pond through lift pump, in anaerobic pond, under anerobe, the hold concurrently absorption of oxygen bacterium, fermentation, methane phase acting in conjunction, organic acid is resolved into methane and carbon dioxide, improve the B/C value of waste water by anaerobic treatment and remove most COD further, improving the biodegradability of waste water.
(11) BAF biochemistry (BAF is biochemical)
Blue charcoal waste water after step (10) secondary anaerobic treatment enters BAF, by oxidation degradation effect, waste water is purified, further removing COD, SS and ammonia nitrogen, be purified waste water, and its COD is 53 mg/L, SS is 10 mg/L, ammonia nitrogen is 5 mg/L, colourity is 8 times.
(12) desalination: the waste water after step BAF biochemistry (BAF is biochemical) enters desalting plant, and be separated to obtain water-dialyzing and condensed water, water-dialyzing enters reuse water basin, condensed water then enters evaporative crystallization pond through discharge channel discharge and carries out crystallization treatment.
Described desalting plant can be reverse osmosis system.
The reverse osmosis membrane assembly of described reverse osmosis system is rolled membrane module, and mould material is cellulose acetate film or composite membrane in organic membrane, and the molecular weight cut-off of mould material is 50 ~ 200MWCO, and entrance pressure can be 6.0 ~ 45.0bar, goes out pressure and can be 4.5 ~ 33.5 bar.
Reuse water after reverse osmosis system process meets the reuse water water-quality guideline of table 2.
Table 2 reuse water water-quality guideline
| Sequence number | Project | Unit | Measured value | Sequence number | Project | Unit | Measured value |
| 1 | COD Cr | mg/L | 10 | 4 | Colourity | Doubly | 4 |
| 2 | SS | mg/L | Must not detect | 5 | Ca | mg/L | ≤1 |
| 3 | Specific conductivity | μS/cm | 120 | 6 | Hardness | mmol/L | 0.1 |
embodiment 2
Certain blue charcoal waste water resource comprehensive utilization and treatment recycling utilization embodiment.
(1) coarse filtration: be 20000 ~ 75000mg/L by COD, ammonia nitrogen be 500 ~ 5000mg/L, total phenol is 1000 ~ 6000mg/L, colourity is 10000 ~ 30000 times, pH value be 10 blue charcoal waste water carry out coarse filtration through grid or screen cloth, removing macrobead foreign material.
(2) breakdown of emulsion: the blue charcoal waste water that step (1) coarse filtration must be removed macrobead thing adds acid and regulates its pH value to 2 ~ 6, destroys the emulsion of coal tar and water, coal tar is separated out.
(3) coal tar oil recovery: by the waste water after step (2) breakdown of emulsion through centrifugation, what obtain recovery obtains coal tar and detar waste water.
Described centrifugation pumps in whizzer by the blue charcoal waste water through step (2) breakdown of emulsion, and be the coal tar of lower floor and the decoking waste water on upper strata through centrifugation, the coal tar of lower floor reclaims through recovery tube; The centrifugal force of centrifugation is 2200 ~ 4000; The Optimal pH be separated is 3 ~ 5, significantly can reduce the consumption of acid.
Through breakdown of emulsion and centrifugation, the tar (bituminous) of 40kg can be reclaimed from every cube of Milan charcoal waste water.
(4) phenol reclaims: blue for the detar of step (3) coal tar oil recovery gained charcoal waste water is added extraction agent extracting and separating and obtain crude phenols and the blue charcoal waste water of dephenolize.
Described extraction agent is the mixture of kerosene and tributyl phosphate.
Reclaim through phenol, the crude phenols of 6kg can be reclaimed from every cube of Milan charcoal waste water.
(5) recovery ammonia: the potassium hydroxide solution that the blue charcoal waste water of dephenolize of step (4) phenol recovery gained adds 10 ~ 20% is regulated its pH value to 10 ~ 12, heating evaporation removing ammonia, ammonia absorbs through persulfate solution to be produced ammonium sulfate or obtains liquefied ammonia and the blue charcoal waste water of deamination through cooling liquid.
The liquefied ammonia of 5kg can be reclaimed from every cube of Milan charcoal waste water through recovery ammonia.
Reclaim through tar, phenol reclaims and after recovery ammonia, the COD of blue charcoal waste water drops to 4500 below mg/L from 75000 mg/L, and phenol is less than 400mg/L, and ammonia nitrogen is less than 80mg/L.
(6) be oxidized: blast air by blue for the deamination of step (5) recovery ammonia gained charcoal waste water, make remaining phenol be oxidized to quinone, reduce phenol to the murder by poisoning of microorganism.
(7) anaerobic treatment: the blue charcoal waste water of step (6) oxidation gained is added alkaline solution and regulates its pH value to 6 ~ 9, anaerobic pond is entered through lift pump, in anaerobic pond, under anerobe, the hold concurrently absorption of oxygen bacterium, fermentation, methane phase acting in conjunction, organic acid is resolved into methane and carbon dioxide, improved B/C value and the removing most COD of waste water by anaerobic treatment, improve the biodegradability of waste water.
(8) aerobic treatment: charcoal waste water blue after step (7) anaerobic treatment is entered Aerobic Pond and intermediate sedimentation pond through lift pump, and the partial sludge in intermediate sedimentation pond is back to Aerobic Pond by reflux pump, by the organism in the blue charcoal waste water of the further oxygenolysis of aerobic treatment, the degree of depth removes COD and BOD; Evenly fill up a large amount of biological suspended packings in Aerobic Pond, perch for aerobic microbiological provides, the place of growth and breeding so that microorganism forms microbial film at filling surface.Aeration aerating stirring system is provided with bottom Aerobic Pond, oxygenation is carried out to sewage, the dissolved oxygen in water is made to maintain 2 ~ 4 mg/L, utilize the effect that gas rises simultaneously, suspended substance in pond is more fully contacted with water, additionally by the agitaion of gas and clear water back flushing, can effectively wash away the aging microbial film of filling surface growth, impel biomembranous update, make the activity that microbial film remains higher.
(9) electrolysis: charcoal waste water blue after step (8) aerobic treatment is entered electrolysis machine and carries out electrolysis, with decolouring and deodorizing, make difficulty in waste water biochemical macromolecular cpd open loop chain rupture simultaneously, become can be biochemical small molecules, further raising B/C value, improves the condition of subsequent biochemical process; The adjacent two interelectrode voltages of electrolysis machine are 2 ~ 12V, and current density is 10 ~ 320mA/cm
2.
Described electrolysis machine is provided with power supply and electrolyzer, and the electrode materials in electrolyzer is the one in graphite, titanium, iron, aluminium, zinc, copper, lead, nickel, molybdenum, chromium, alloy or nano-catalytic inert material.
(10) secondary anaerobic treatment: the blue charcoal waste water of step (9) electrolysis gained is entered secondary anaerobic pond through lift pump, in anaerobic pond, under anerobe, the hold concurrently absorption of oxygen bacterium, fermentation, methane phase acting in conjunction, organic acid is resolved into methane and carbon dioxide, improve the B/C value of waste water by anaerobic treatment and remove most COD further, improving the biodegradability of waste water.
(11) BAF biochemistry (BAF is biochemical)
Blue charcoal waste water after step (10) secondary anaerobic treatment enters BAF, is purified, remove COD, SS and ammonia nitrogen further, be purified waste water by oxidation degradation effect to waste water.
(12) desalination: the waste water after step (11) BAF biochemistry (BAF is biochemical) enters desalting plant, be separated to obtain water-dialyzing and condensed water, water-dialyzing enters reuse water basin, and condensed water then enters evaporative crystallization pond through discharge channel discharge and carries out crystallization treatment.
Described desalting plant can be reverse osmosis system.
The reverse osmosis membrane assembly of described reverse osmosis system is rolled membrane module, and mould material is cellulose acetate film or composite membrane in organic membrane, and the molecular weight cut-off of mould material is 50 ~ 200MWCO, and entrance pressure can be 6.0 ~ 45.0bar, goes out pressure and can be 4.5 ~ 33.5 bar.
embodiment 3
Certain blue charcoal waste water resource comprehensive utilization and treatment recycling utilization embodiment.
(1) coarse filtration: be 35000mg/L by COD, ammonia nitrogen be 2215mg/L, total phenol is 3500mg/L, colourity is 22000 times, pH value be 8.6 blue charcoal waste water carry out coarse filtration through grid or screen cloth, removing macrobead foreign material.
(2) breakdown of emulsion: the blue charcoal waste water that step (1) coarse filtration must be removed macrobead thing adds acid and regulates its pH value to 3 ~ 4, destroys the emulsion of coal tar and water, coal tar is separated out.
Acid used is the one in sulfuric acid, nitric acid, hydrochloric acid or phosphoric acid, and optimum is sulfuric acid.
(3) coal tar oil recovery: by the waste water after step (2) breakdown of emulsion through centrifugation, what obtain recovery obtains coal tar and detar waste water.
Described centrifugation pumps in whizzer by the blue charcoal waste water through step (2) breakdown of emulsion, and be the coal tar of lower floor and the decoking waste water on upper strata through centrifugation, the coal tar of lower floor reclaims through recovery tube; The centrifugal force of centrifugation is 3200 ~ 3600.
The optimal ph be separated is 3 ~ 4, significantly can reduce the consumption of acid.
Reclaim the tar (bituminous) that can reclaim 21kg from every cube of Milan charcoal waste water through tar, make the COD clearance of blue charcoal waste water reach 30 ~ 55%.
(4) phenol reclaims: blue for the detar of step (3) coal tar oil recovery gained charcoal waste water is added extraction agent extracting and separating and obtain crude phenols and the blue charcoal waste water of dephenolize, COD clearance reaches 35 ~ 70%.
Described extraction agent is kerosene.
Through phenol recycling step, the crude phenols of 3.5kg can be reclaimed from every cube of Milan charcoal waste water.
(5) recovery ammonia: the sodium carbonate solution that blue for the dephenolize after the recovery of step (4) phenol charcoal waste water adds 10 ~ 20% is regulated its pH to 10-12, heating evaporation removing ammonia, ammonia absorbs through persulfate solution to be produced ammonium sulfate or obtains liquefied ammonia and the blue charcoal waste water of deamination through cooling liquid.
Through recovery ammonia step, the ammonia of 2.15kg can be reclaimed from every cube of Milan charcoal waste water.
Reclaim through tar, phenol reclaims and after recovery ammonia, the COD of blue charcoal waste water drops to 4000 below mg/L from 35000 mg/L, and phenol is less than 280mg/L, and ammonia nitrogen is less than 60mg/L.
(6) be oxidized: blast air by blue for the deamination of step (5) recovery ammonia gained charcoal waste water, make remaining phenol be oxidized to quinone, reduce phenol and the generation of subsequent treatment process microorganism is poisoned.
(7) anaerobic treatment: the blue charcoal waste water of step (6) oxidation gained is added alkaline solution and regulates its pH value to 6 ~ 9, anaerobic pond is entered through lift pump, in anaerobic pond, under anerobe, the hold concurrently absorption of oxygen bacterium, fermentation, methane phase acting in conjunction, organic acid is resolved into methane and carbon dioxide, improved B/C value and the removing most COD of waste water by anaerobic treatment, improve the biodegradability of waste water.
(8) aerobic treatment: charcoal waste water blue after step (7) anaerobic treatment is entered Aerobic Pond and intermediate sedimentation pond through lift pump, and the partial sludge in intermediate sedimentation pond is back to Aerobic Pond by reflux pump, by the organism in the blue charcoal waste water of the further oxygenolysis of aerobic treatment, the degree of depth removes COD and BOD; Evenly fill up a large amount of biological suspended packings in Aerobic Pond, perch for aerobic microbiological provides, the place of growth and breeding so that microorganism forms microbial film at filling surface.Aeration aerating stirring system is provided with bottom Aerobic Pond, oxygenation is carried out to sewage, the dissolved oxygen in water is made to maintain 2 ~ 4 mg/L, utilize the effect that gas rises simultaneously, suspended substance in pond is more fully contacted with water, additionally by the agitaion of gas and clear water back flushing, can effectively wash away the aging microbial film of filling surface growth, impel biomembranous update, make the activity that microbial film remains higher.
(9) electrolysis: charcoal waste water blue after step (8) aerobic treatment is entered electrolysis machine and carries out electrolysis, with decolouring and deodorizing, make difficulty in waste water biochemical macromolecular cpd open loop chain rupture simultaneously, become can be biochemical small molecules, further raising B/C value, improves the condition of subsequent biochemical process; The adjacent two interelectrode voltages of electrolysis machine are 2 ~ 12V, and current density is 10 ~ 320mA/cm
2.
Described electrolysis machine is provided with power supply and electrolyzer, and the electrode materials in electrolyzer is the one in graphite, titanium, iron, aluminium, zinc, copper, lead, nickel, molybdenum, chromium, alloy or nano-catalytic inert material.
(10) secondary anaerobic treatment: the blue charcoal waste water of step (9) electrolysis gained is entered secondary anaerobic pond through lift pump, in anaerobic pond, under anerobe, the hold concurrently absorption of oxygen bacterium, fermentation, methane phase acting in conjunction, organic acid is resolved into methane and carbon dioxide, improve the B/C value of waste water by anaerobic treatment and remove most COD further, improving the biodegradability of waste water.
(11) MBR film process
Blue charcoal waste water after step (10) secondary anaerobic treatment enters MBR membrane treatment appts, is purified, remove COD, SS and ammonia nitrogen further, be purified waste water by the filtering separation of MBR membrane treatment appts or oxidation degradation effect to waste water.
The membrane module of described MBR device is selected from the one in Pvdf Microporous Hollow Fiber Membrane, polypropylene hollow fiber membrane, ps hollow fiber uf membrane, polyethersulfone, polyacrylonitrile and PVC hollow fiber membrane, membrane pore size is 0.10 ~ 0.2 μm, operating pressure is-1 ~-50kPa, and working temperature is 5 ~ 45 DEG C.
(12) desalination: the waste water after the process of step (11) MBR film enters desalting plant, and be separated to obtain water-dialyzing and condensed water, water-dialyzing enters reuse water basin, condensed water then enters evaporative crystallization pond through discharge channel discharge and carries out crystallization treatment.
Described desalting plant can be nanofiltration system.
Nanofiltration membrane component in described nanofiltration system is the one of tubular membrane component, rolled membrane module or plate film assembly, and operating pressure is 6 ~ 45bar, and working temperature is 20 ~ 45 DEG C, and optimum temps is 35 ~ 40 DEG C.
embodiment 4
Certain blue charcoal waste water resource comprehensive utilization and treatment recycling utilization embodiment.
(1) coarse filtration: be 34967mg/L by COD, ammonia nitrogen be 1911mg/L, total phenol is 2850mg/L, colourity is 23000 times, pH value be 8.3 blue charcoal waste water carry out coarse filtration through grid or screen cloth, removing macrobead foreign material.
(2) breakdown of emulsion: the blue charcoal waste water that step (1) coarse filtration must be removed macrobead thing adds acid and regulates its pH value to 2 ~ 6, destroys the emulsion of coal tar and water, coal tar is separated out.
Breakdown of emulsion regulates pH acid used to be one in sulfuric acid, hydrochloric acid, nitric acid or phosphoric acid, and optimum is sulfuric acid.
(3) coal tar oil recovery: that must be reclaimed through gravity settling separation by the waste water after step (2) breakdown of emulsion obtains coal tar and detar waste water.
Described gravity settling separation puts into gravity settling basin by through the blue charcoal waste water of step (2) breakdown of emulsion gained, and be the coal tar of lower floor and the decoking waste water on upper strata through gravity settling separation, the coal tar of lower floor reclaims through recovery tube.
Reclaim the tar (bituminous) that can reclaim 20kg from every cube of Milan charcoal waste water through tar, make the COD clearance of blue charcoal waste water reach 30 ~ 55%.
(4) phenol reclaims: the blue charcoal waste water of detar step (3) tar being reclaimed gained adds extraction agent extracting and separating and obtains crude phenols and the blue charcoal waste water of dephenolize, and COD clearance reaches 35 ~ 70%.
Described extraction agent is mibk.
Through phenol recycling step, the crude phenols of 2.8kg can be reclaimed from every cube of Milan charcoal waste water.
(5) recovery ammonia: the sodium hydroxide solution that the blue charcoal waste water of dephenolize of step (4) phenol recovery gained adds 10 ~ 20% is regulated its pH value to 10 ~ 11, heating evaporation removing ammonia, ammonia absorbs through persulfate solution to be produced ammonium sulfate or obtains liquefied ammonia and the blue charcoal waste water of deamination through cooling liquid.
(6) be oxidized: blast air by blue for the deamination of step (5) recovery ammonia gained charcoal waste water, make remaining phenol be oxidized to quinone, reduce phenol to the murder by poisoning of microorganism.
(7) anaerobic treatment: the blue charcoal waste water of step (6) oxidation gained is added alkaline solution and regulates its pH value to 6 ~ 9, anaerobic pond is entered through lift pump, in anaerobic pond, under anerobe, the hold concurrently absorption of oxygen bacterium, fermentation, methane phase acting in conjunction, organic acid is resolved into methane and carbon dioxide, improved B/C value and the removing most COD of waste water by anaerobic treatment, improve the biodegradability of waste water.
(8) aerobic treatment: charcoal waste water blue after step (7) anaerobic treatment is entered Aerobic Pond and intermediate sedimentation pond through lift pump, and the partial sludge in intermediate sedimentation pond is back to Aerobic Pond by reflux pump, by the organism in the blue charcoal waste water of the further oxygenolysis of aerobic treatment, the degree of depth removes COD and BOD; Evenly fill up a large amount of biological suspended packings in Aerobic Pond, perch for aerobic microbiological provides, the place of growth and breeding so that microorganism forms microbial film at filling surface.Aeration aerating stirring system is provided with bottom Aerobic Pond, oxygenation is carried out to sewage, the dissolved oxygen in water is made to maintain 2 ~ 4 mg/L, utilize the effect that gas rises simultaneously, suspended substance in pond is more fully contacted with water, additionally by the agitaion of gas and clear water back flushing, can effectively wash away the aging microbial film of filling surface growth, impel biomembranous update, make the activity that microbial film remains higher.
(9) electrolysis: charcoal waste water blue after step (8) aerobic treatment is entered electrolysis machine and carries out electrolysis, with decolouring and deodorizing, make difficulty in waste water biochemical macromolecular cpd open loop chain rupture simultaneously, become can be biochemical small molecules, further raising B/C value, improves the condition of subsequent biochemical process; The adjacent two interelectrode voltages of electrolysis machine are 2 ~ 12V, and current density is 10 ~ 320mA/cm
2.
Described electrolysis machine is provided with power supply and electrolyzer, and the electrode materials in electrolyzer is the one in graphite, titanium, iron, aluminium, zinc, copper, lead, nickel, molybdenum, chromium, alloy or nano-catalytic inert material.
(10) secondary anaerobic treatment: the blue charcoal waste water of step (9) electrolysis gained is entered secondary anaerobic pond through lift pump, in anaerobic pond, under anerobe, the hold concurrently absorption of oxygen bacterium, fermentation, methane phase acting in conjunction, organic acid is resolved into methane and carbon dioxide, improve the B/C value of waste water by anaerobic treatment and remove most COD further, improving the biodegradability of waste water.
(11) MBR film process
Blue charcoal waste water after step (10) secondary anaerobic treatment enters MBR membrane treatment appts, is purified, remove COD, SS and ammonia nitrogen further, be purified waste water by the filtering separation of MBR membrane treatment appts or oxidation degradation effect to waste water.
The membrane module of described MBR device is selected from the one in Pvdf Microporous Hollow Fiber Membrane, polypropylene hollow fiber membrane, ps hollow fiber uf membrane, polyethersulfone, polyacrylonitrile and PVC hollow fiber membrane, membrane pore size is 0.10 ~ 0.2 μm, operating pressure is-1 ~-50kPa, and working temperature is 5 ~ 45 DEG C.
(12) desalination: the waste water after the process of step (11) MBR film enters desalting plant, and be separated to obtain water-dialyzing and condensed water, water-dialyzing enters reuse water basin, condensed water then enters evaporative crystallization pond through discharge channel discharge and carries out crystallization treatment.
Described desalting plant can be electrodialysis.
The working conditions of described electrodialysis system is operating voltage pressure 0.5 ~ 3.0 kg/cm
2, operating voltage 50 ~ 250V, strength of current 1 ~ 3A.
embodiment 5
Certain blue charcoal waste water resource comprehensive utilization and treatment recycling utilization embodiment.
(1) coarse filtration: be 65000mg/L by COD, ammonia nitrogen be 4215mg/L, total phenol is 3100mg/L, colourity is 27000 times, pH value be 9.2 blue charcoal waste water carry out coarse filtration through grid or screen cloth, removing macrobead foreign material.
(2) breakdown of emulsion: the blue charcoal waste water that step (1) coarse filtration must be removed macrobead thing adds acid and regulates its pH value to 2 ~ 4, destroys the emulsion of coal tar and water, coal tar is separated out.
The acid used of described breakdown of emulsion is the one in sulfuric acid, nitric acid, phosphoric acid or hydrochloric acid, and optimum is sulfuric acid.
(3) coal tar oil recovery: by the blue charcoal waste water after step (2) breakdown of emulsion through centrifugation, what obtain recovery obtains coal tar and detar waste water.
Described centrifugation will pump in whizzer through the blue charcoal waste water of step (2) breakdown of emulsion gained, and be the coal tar of lower floor and the decoking waste water on upper strata through centrifugation, the coal tar of lower floor reclaims through recovery tube; The centrifugal force of centrifugation is 2200 ~ 4000.
Reclaimed by tar, the tar (bituminous) of 32kg can be reclaimed from every cube of Milan charcoal waste water, make the COD clearance of blue charcoal waste water reach 30 ~ 55%.
(4) phenol reclaims: the blue charcoal waste water of detar step (3) tar being reclaimed gained adds extraction agent extracting and separating and obtains crude phenols and the blue charcoal waste water of dephenolize, and COD clearance reaches 35 ~ 70%.
Described extraction agent is isopropyl ether.
Reclaimed by phenol, the crude phenols of 3.1kg can be reclaimed from every cube of Milan charcoal waste water.
(5) recovery ammonia: the sodium hydroxide solution that the blue charcoal waste water of dephenolize of step (4) phenol recovery gained adds 10 ~ 20% is regulated its pH value to 10 ~ 12, heating evaporation removing ammonia, ammonia absorbs through persulfate solution to be produced ammonium sulfate or obtains liquefied ammonia and the blue charcoal waste water of deamination through cooling liquid.
By recovery ammonia, the ammonia of 4.1kg can be reclaimed from every cube of Milan charcoal waste water.
Reclaim through tar, phenol reclaims and after recovery ammonia, the COD of blue charcoal waste water drops to 3800 below mg/L from 65000 mg/L, and phenol is less than 270mg/L, and ammonia nitrogen is less than 75mg/L.
(6) be oxidized: blast air by blue for the deamination of step (5) recovery ammonia gained charcoal waste water, make remaining phenol be oxidized to quinone, reduce phenol and the generation of subsequent treatment process microorganism is poisoned.
(7) anaerobic treatment: the blue charcoal waste water of step (6) oxidation gained is added alkaline solution and regulates its pH value to 6 ~ 9, anaerobic pond is entered through lift pump, in anaerobic pond, under anerobe, the hold concurrently absorption of oxygen bacterium, fermentation, methane phase acting in conjunction, organic acid is resolved into methane and carbon dioxide, improved B/C value and the removing most COD of waste water by anaerobic treatment, improve the biodegradability of waste water.
(8) aerobic treatment: charcoal waste water blue after step (7) anaerobic treatment is entered Aerobic Pond and intermediate sedimentation pond through lift pump, and the partial sludge in intermediate sedimentation pond is back to Aerobic Pond by reflux pump, by the organism in the blue charcoal waste water of the further oxygenolysis of aerobic treatment, the degree of depth removes COD and BOD; Evenly fill up a large amount of biological suspended packings in Aerobic Pond, perch for aerobic microbiological provides, the place of growth and breeding so that microorganism forms microbial film at filling surface.Aeration aerating stirring system is provided with bottom Aerobic Pond, oxygenation is carried out to sewage, the dissolved oxygen in water is made to maintain 2 ~ 4 mg/L, utilize the effect that gas rises simultaneously, suspended substance in pond is more fully contacted with water, additionally by the agitaion of gas and clear water back flushing, can effectively wash away the aging microbial film of filling surface growth, impel biomembranous update, make the activity that microbial film remains higher;
(9) electrolysis: charcoal waste water blue after step (8) aerobic treatment is entered electrolysis machine and carries out electrolysis, with decolouring and deodorizing, make difficulty in waste water biochemical macromolecular cpd open loop chain rupture simultaneously, become can be biochemical small molecules, further raising B/C value, improves the condition of subsequent biochemical process; The adjacent two interelectrode voltages of electrolysis machine are 2 ~ 12V, and current density is 10 ~ 320mA/cm
2.
Described electrolysis machine is provided with power supply and electrolyzer, and the electrode materials in electrolyzer is the one in graphite, titanium, iron, aluminium, zinc, copper, lead, nickel, molybdenum, chromium, alloy or nano-catalytic inert material.
(10) secondary anaerobic treatment: the blue charcoal waste water of step (9) electrolysis gained is entered secondary anaerobic pond through lift pump, in anaerobic pond, under anerobe, the hold concurrently absorption of oxygen bacterium, fermentation, methane phase acting in conjunction, organic acid is resolved into methane and carbon dioxide, improve the B/C value of waste water by anaerobic treatment and remove most COD further, improving the biodegradability of waste water.
(11) BAF biochemistry (BAF is biochemical)
Enter BAF after step (10) secondary anaerobic treatment, by oxidation degradation effect, waste water is purified, remove COD, SS and ammonia nitrogen further, be purified waste water.
(12) desalination: the waste water after step (11) BAF biochemistry (BAF is biochemical) enters desalting plant, be separated to obtain water-dialyzing and condensed water, water-dialyzing enters reuse water basin, and condensed water then enters evaporative crystallization pond through discharge channel discharge and carries out crystallization treatment.
Described desalting plant can be the one of capacitive adsorption deionizing system.
The working conditions of described capacitive adsorption deionizing system is volts DS is 110V ~ 2 × 10
6v.
Above are only the specific embodiment of the present invention, but design concept of the present invention is not limited thereto, all changes utilizing this design the present invention to be carried out to unsubstantiality, all should belong to the behavior of invading scope.
Claims (14)
1. a blue charcoal waste water resource comprehensive utilization and treatment cyclic utilization method, is characterized in that, comprise the steps:
(1) coarse filtration: be 10000 ~ 75000mg/L by COD, ammonia nitrogen be 500 ~ 5000mg/L, total phenol is 1000 ~ 6000mg/L, colourity is 1000 ~ 3000 times, pH value be 8 ~ 10 blue charcoal waste water carry out coarse filtration through grid or screen cloth, removing macrobead foreign material;
(2) breakdown of emulsion: the blue charcoal waste water that step (1) coarse filtration must be removed macrobead thing adds acid and regulates its pH value to 2 ~ 6 breakdown of emulsion, and tar is separated out;
(3) burnt oil recovery: by the waste water after step (2) breakdown of emulsion through gravity settling separation or centrifugation, reclaim to obtain 10 ~ 40kg/m
3coal tar and the blue charcoal waste water of detar, the clearance of blue charcoal waste water COD reaches 30 ~ 55%;
(4) phenol reclaims: the blue charcoal waste water of detar of step (3) coal tar oil recovery gained adds extraction agent extracting and separating and obtains 1 ~ 6kg/m
3crude phenols and the blue charcoal waste water of dephenolize, COD clearance reaches 35 ~ 70%;
(5) recovery ammonia: the blue charcoal waste water of step (4) dephenolize adds alkaline solution and regulates its pH value to 10 ~ 12, heating evaporation removing ammonia, ammonia absorbs through persulfate solution to be produced ammonium sulfate or obtains liquefied ammonia and the blue charcoal waste water of deamination through cooling liquid, the removal of ammonia reaches more than 99%, the COD of blue charcoal waste water drops to 2000 ~ 4500mg/L, and ammonia nitrogen drops to below 80mg/L;
(6) be oxidized: blast air by blue for the deamination of step (5) recovery ammonia gained charcoal waste water, make remaining phenol be oxidized to quinone, reduce phenol and the microorganism generation in subsequent treatment process is poisoned;
(7) anaerobic treatment: the blue charcoal waste water of step (6) oxidation gained is added solution and regulates its pH to 6 ~ 9, anaerobic pond is entered through lift pump, in anaerobic pond, under anerobe, the hold concurrently absorption of oxygen bacterium, fermentation, methane phase acting in conjunction, organic acid is resolved into methane and carbon dioxide, improved B/C value and the removing most COD of waste water by anaerobic treatment, improve the biodegradability of waste water;
(8) aerobic treatment: charcoal waste water blue after step (7) anaerobic treatment is entered Aerobic Pond and intermediate sedimentation pond through lift pump, and the partial sludge in intermediate sedimentation pond is back to Aerobic Pond by reflux pump, by the organism in the blue charcoal waste water of the further oxygenolysis of aerobic treatment, the degree of depth removes COD and BOD; Evenly fill up a large amount of biological suspended packings in Aerobic Pond, perch for aerobic microbiological provides, the place of growth and breeding so that microorganism forms microbial film at filling surface;
Aeration aerating stirring system is provided with bottom Aerobic Pond, oxygenation is carried out to sewage, the dissolved oxygen in water is made to maintain 2 ~ 4 mg/L, utilize the effect that gas rises simultaneously, suspended substance in pond is more fully contacted with water, additionally by the agitaion of gas and clear water back flushing, can effectively wash away the aging microbial film of filling surface growth, impel biomembranous update, make the activity that microbial film remains higher;
(9) electrolysis: charcoal waste water blue after step (8) aerobic treatment is entered electrolysis machine and carries out electrolysis, to remove colourity, smelly, make the difficulty biochemical macromolecular cpd open loop chain rupture in waste water simultaneously, become can be biochemical small molecules, further raising B/C value, improves the condition of subsequent biochemical process; The adjacent two interelectrode voltages of electrolysis machine are 2 ~ 12V, and current density is 10 ~ 320mA/cm
2;
(10) secondary anaerobic treatment: the blue charcoal waste water of step (9) electrolysis gained is entered secondary anaerobic pond through lift pump, in anaerobic pond, under anerobe, the hold concurrently absorption of oxygen bacterium, fermentation, methane phase acting in conjunction, organic acid is resolved into methane and carbon dioxide, improve the B/C value of waste water by anaerobic treatment and remove most COD further, improving the biodegradability of waste water;
(11) process of MBR film or BAF biochemistry: the blue charcoal waste water after step (10) secondary anaerobic treatment enters MBR membrane treatment appts or BAF, by the filtering separation of MBR membrane treatment appts or BAF and oxidation degradation effect, waste water is purified, further removing COD, SS and ammonia nitrogen, be purified waste water;
(12) desalination: the waste water after step (11) MBR film process or BAF biochemistry enters desalting plant, be separated to obtain water-dialyzing and condensed water, water-dialyzing enters reuse water basin, and condensed water then enters evaporative crystallization pond through discharge channel discharge and carries out crystallization treatment.
2. a kind of blue charcoal waste water resource comprehensive utilization and treatment cyclic utilization method as claimed in claim 1, is characterized in that: the acid described in step (2) breakdown of emulsion is the one of sulfuric acid, nitric acid, hydrochloric acid or phosphoric acid.
3. a kind of blue charcoal waste water resource comprehensive utilization and treatment cyclic utilization method as claimed in claim 1, it is characterized in that: the gravity settling separation described in step (3) coal tar oil recovery pumps in gravity settling basin by the blue charcoal waste water through step (2) breakdown of emulsion, be the blue charcoal waste water of coal tar and decoking through gravity settling separation, coal tar reclaims through recovery tube.
4. a kind of blue charcoal waste water resource comprehensive utilization and treatment cyclic utilization method as claimed in claim 1, it is characterized in that: the centrifugation described in step (3) coal tar oil recovery pumps in whizzer by the blue charcoal waste water through step (2) breakdown of emulsion, be coal tar and decoking waste water through centrifugation, coal tar reclaims through recovery tube; The centrifugal force of centrifugation is 2200 ~ 4000; The Optimal pH be separated is 3 ~ 5, significantly can reduce the consumption of acid.
5. a kind of blue charcoal waste water resource comprehensive utilization and treatment cyclic utilization method as claimed in claim 1, it is characterized in that: the extraction agent described in step (4) phenol reclaims is kerosene, mibk, N, N,-dimethyl-g yl acetamide (N, N ,-503), the one of tributyl phosphate, isopropyl ether, N-BUTYL ACETATE or crude benzol or its mixture; Optimum extractant is N, N, the one of the mixture of-dimethyl-g yl acetamide (N, N ,-503) and kerosene or the mixture of tributyl phosphate and kerosene.
6. a kind of blue charcoal waste water resource comprehensive utilization and treatment cyclic utilization method as claimed in claim 1, is characterized in that: the alkaline solution described in step (5) recovery ammonia is the one of sodium hydroxide, potassium hydroxide or sodium carbonate.
7. a kind of blue charcoal waste water resource comprehensive utilization and treatment cyclic utilization method as claimed in claim 1, it is characterized in that: the electrolysis machine described in step (9) electrolysis is provided with power supply and electrolyzer, the electrode materials in electrolyzer is the one in graphite, titanium, iron, aluminium, zinc, copper, lead, nickel, molybdenum, chromium, alloy or nano-catalytic inert material.
8. a kind of blue charcoal waste water resource comprehensive utilization and treatment cyclic utilization method as claimed in claim 1, it is characterized in that: the membrane module of the described MBR device of step (11) is selected from the one in Pvdf Microporous Hollow Fiber Membrane, polypropylene hollow fiber membrane, ps hollow fiber uf membrane, polyethersulfone, polyacrylonitrile and PVC hollow fiber membrane, membrane pore size is 0.10 ~ 0.2 μm, operating pressure is-1 ~-50kPa, and working temperature is 5 ~ 45 DEG C.
9. a kind of blue charcoal waste water resource comprehensive utilization and treatment cyclic utilization method as claimed in claim 1, is characterized in that: described desalting plant is the one of reverse osmosis system, nanofiltration system, electrodialysis or capacitive adsorption deionizing system.
10. a kind of blue charcoal waste water resource comprehensive utilization and treatment cyclic utilization method as claimed in claim 9, it is characterized in that: the reverse osmosis membrane assembly of described reverse osmosis system is rolled membrane module, mould material is cellulose acetate film or composite membrane in organic membrane, the molecular weight cut-off of mould material is 50 ~ 200MWCO, entrance pressure is 6.0 ~ 45.0bar, and going out pressure is 4.5 ~ 33.5 bar.
11. a kind of blue charcoal waste water resource comprehensive utilization and treatment cyclic utilization method as claimed in claim 9, it is characterized in that: the nanofiltration membrane component in described nanofiltration system is the one of tubular membrane component, rolled membrane module or plate film assembly, operating pressure is 6 ~ 45bar, and working temperature is 20 ~ 45 DEG C.
12. a kind of blue charcoal waste water resource comprehensive utilization and treatment cyclic utilization method as claimed in claim 9, is characterized in that: the working conditions of described electrodialysis system is operating voltage pressure 0.5 ~ 3.0 kg/cm
2, operating voltage 50 ~ 250V, strength of current 1 ~ 3A.
13. a kind of blue charcoal waste water resource comprehensive utilization and treatment cyclic utilization method as claimed in claim 9, is characterized in that: the working conditions of described capacitive adsorption deionizing system is volts DS is 110V ~ 2 × 10
6v.
14. a kind of blue charcoal waste water resource comprehensive utilization and treatment cyclic utilization method as claimed in claim 1, it is characterized in that: after step (5) recovery ammonia, also have a desulfurized step, ferrous sulfate is added by the blue charcoal waste water after recovery ammonia, the negative sulfidion in waste water and iron ion is made to generate to precipitate and remove, prevent sulfide to the murder by poisoning of biochemistry, improve its biochemical effects, after desulfurization, the COD of blue charcoal waste water declines 10 ~ 20%.
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Application publication date: 20150923 |