CN109231725A - A kind of advanced treatment process of coking wastewater - Google Patents
A kind of advanced treatment process of coking wastewater Download PDFInfo
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- CN109231725A CN109231725A CN201811387882.6A CN201811387882A CN109231725A CN 109231725 A CN109231725 A CN 109231725A CN 201811387882 A CN201811387882 A CN 201811387882A CN 109231725 A CN109231725 A CN 109231725A
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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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- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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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
- C02F3/02—Aerobic processes
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Abstract
The present invention provides a kind of advanced treatment process of coking wastewater, comprising the following steps: S1, coking wastewater enter acidification reaction pond through grid sewage-removing machine, and adjusting pH with sulfuric acid solution is 4~6, and acidification, it is 6~7 that barium hydroxide solution, which adjusts pH, obtain acidification liquid；S2, composite treating agent is added into acidification liquid, 40~50 DEG C of 1~2h of stirring are stirred at room temperature 1~2h, obtain biochemical reaction pretreatment fluid；S3, coking wastewater biochemical reaction obtain biochemical reaction liquid；S4, it is added aluminum sulfate into biochemical reaction liquid, coagulant precipitation, precipitation and separation, supernatant is delivered to effluent collection pond through water outlet, completes the advanced treatment process of coking wastewater.Advanced treatment process proposed by the present invention, treatment effect is excellent, and biochemical reaction and advanced treatment process are easy to carry out, and COD content and coloration meet GB8978-1996 " integrated wastewater discharge standard " in water outlet.
Description
Technical field
The present invention relates to Technologies of Coke Plant Wastewater Treatment field more particularly to a kind of advanced treatment process of coking wastewater.
Background technique
Organic wastewater is exactly the waste water based on organic pollutant, and organic wastewater easily causes Water Eutrophication, hazard ratio
It is larger.The COD that organic wastewater generally refers to be discharged by industries such as papermaking, leather and food is in 2000mg/L or more, these waste water
In containing the organic matters such as a large amount of carbohydrate, fat, albumen, cellulose will cause serious pollution if direct emission.
Source can be divided into three categories organic wastewater by its nature: the first kind is to be readily biodegradable organic wastewater；Second class is organic matter
The waste water that can be degraded, but contain hazardous substance；Third class is difficult for biological degradation and harmful organic wastewater, and wherein third class has
The processing difficulty of machine waste water is maximum.
Coking wastewater is a kind of waste water that the ingredient containing tens kinds of pollutants such as phenol, cyanogen, benzene, ammonia nitrogen is extremely complex, it
It is a kind of typical organic wastewater with difficult degradation thereby.It is at present first progress oil removal for the main processing ways of coking wastewater, air bearing, sinks
The pretreatment such as shallow lake, hydrolysis acidification, then biochemical treatment is carried out, finally carry out precipitation and separation, flocculation even depth processing.But coking wastewater
In BOD/COD ratio it is lower, biochemical treatment difficulty is larger, and after traditional tertiary treatment process in coking wastewater
Ammonia nitrogen and suspended matter can generally achieve national standard reference, but a large amount of organic matter as present in coking wastewater causes
COD and chromaticity index are extremely difficult to national grade one discharge standard requirement, and based on the deficiencies of the prior art, the present invention proposes a kind of coke
Change the advanced treatment process of waste water.
Summary of the invention
The purpose of the present invention is to solve in prior art, biochemical treatment difficulty is big, and COD and coloration are difficult in effluent quality
The problem of to reach national standard reference, and a kind of advanced treatment process of the coking wastewater proposed.
In order to achieve the above object, the present invention is achieved by the following technical programs:
A kind of advanced treatment process of coking wastewater, comprising the following steps:
The acidification of S1, coking wastewater: coking wastewater is stored in wastewater collection pond, by coking wastewater by wastewater collection pond
It flows through grid sewage-removing machine and enters acidification reaction pond, it is molten that the sulfuric acid that mass concentration is 10%~20% is added into acidification reaction pond
The pH that liquid adjusts coking wastewater is 4~6, handles 2~5h, is adjusted with the barium hydroxide solution that mass concentration is 5%~10% burnt
The pH for changing waste water is 6~7, then is filtered, and acidification liquid is obtained；
The biochemical reaction pretreatment of S2, coking wastewater: the 0.35 ‰ of acidification liquid quality is added into acidification liquid
~0.65 ‰ composite treating agent stirs 1~2h with 200~300r/min speed, is down to room temperature under conditions of 40~50 DEG C
Continue 1~2h of stirring, stand, filtering obtains biochemical reaction pretreatment fluid；
The composite treating agent is mixed in dehydrated alcohol by the zinc polysilicate that mass ratio is 3~8:1 and processing auxiliary agent, is subtracted
Pressure concentration is dried and is obtained；
The processing auxiliary agent is prepared by following methods, takes the potassium carbonate of 1~4 parts by weight and the 5- first of 2~6 parts by weight
Base pyrazine -2- carboxylic acid is heated to 100~105 DEG C, the oxidation of 0.5~2.5 parts by weight is added after suitable boiling water dissolution is added
Graphene, the attapulgite of 25~31 parts by weight and 10~16 parts by weight granularities be 180~200 mesh furfural dregs, stirring 20~
30min is concentrated under reduced pressure, is drying to obtain processing auxiliary agent；
The biochemical reaction of S3, coking wastewater: carrying out aerobic treatment to the biochemical reaction pretreatment fluid that step S2 is obtained,
Concrete operations are as follows: the temperature for controlling aerobic treatment is 30~40 DEG C, and air is pumped into biochemical reaction pretreatment fluid, is guaranteed
The dissolved oxygen of biochemical reaction pretreatment fluid is 2~4mg/L, carries out continuity run, and hydraulic detention time is 8~10h, and separation is heavy
It forms sediment, supernatant is biochemical reaction liquid；
The advanced treating of S4, coking wastewater: biochemical reaction liquid quality is added into the biochemical reaction liquid that step S3 is obtained
0.1 ‰~0.3 ‰ aluminum sulfate, coagulant precipitation, precipitation and separation, supernatant are delivered to effluent collection pond through water outlet, complete burnt
Change the advanced treatment process of waste water.
Preferably, in step S2, the quality of the composite treating agent is the 0.5 ‰ of acidification liquid quality.
Preferably, the mass ratio of zinc polysilicate and processing auxiliary agent is 5:1 in the composite treating agent.
Preferably, it is described processing auxiliary agent include following parts by weight raw material: 28 parts of attapulgite, 1.5 parts of graphene oxide,
2 parts of potassium carbonate, 4 parts of 5-Methylpyrazine-2-carboxylic acid, 13 parts of furfural dregs of 200 mesh.
Advanced treatment process proposed by the present invention, advantage is compared with prior art:
1, the advanced treatment process of coking wastewater proposed by the present invention, using acidification-biochemical reaction pretreatment-biochemistry
The mode that reaction-advanced treating combines carries out advanced treating to coking wastewater, can be effectively reduced the COD value in coking wastewater
With the coloration of coking wastewater, and before biochemical reaction carry out biochemical reaction pretreatment can make in biochemical reaction pretreatment fluid
The more original coking wastewater of BOD/COD value significantly improves, and improves the biodegradability of waste water, is conducive to subsequent biochemical reaction and depth
Treatment process guarantees that effluent quality reaches the primary standard of GB8978-1996 " integrated wastewater discharge standard ", effectively solves tradition
Biochemical treatment difficulty present in coking waste water treatment process is big, COD and coloration problem not up to standard in effluent quality.
2, the present invention is prepared in carrying out biochemical reaction preprocessing process using rational proportion zinc polysilicate and processing auxiliary agent
And come composite treating agent pre-processed, and by attapulgite, graphene oxide, potassium carbonate, 5-Methylpyrazine-2-carboxylic acid and
The processing auxiliary agent that the furfural dregs of 180~200 mesh are prepared can carry out synergistic with zinc polysilicate and compound, and play synergistic work
With effectively removing the organic matter in coking wastewater, reduce COD content and coloration in coking wastewater, improve the ratio of BOD/COD
Value, improves the biodegradability of waste water, facilitates subsequent biochemical reaction and advanced treating to go on smoothly, the experiment proved that the present invention makes
When the mass ratio of zinc polysilicate and processing auxiliary agent is 3~8:1 in composite treating agent, treatment effect is more excellent, and in zinc silicate
Mass ratio with processing auxiliary agent is optimal to the comprehensive treatment effect of COD content and coloration in coking wastewater when being 5:1.
Specific embodiment
Combined with specific embodiments below the present invention is made further to explain.
Embodiment 1
A kind of advanced treatment process of coking wastewater proposed by the present invention, comprising the following steps:
The acidification of S1, coking wastewater: coking wastewater is stored in wastewater collection pond, by coking wastewater by wastewater collection pond
It flows through grid sewage-removing machine and enters acidification reaction pond, the sulfuric acid solution that mass concentration is 10% is added into acidification reaction pond and adjusts
The pH of coking wastewater is 6, handles 5h, and the pH that the barium hydroxide solution for being 5% with mass concentration adjusts coking wastewater is 7, then into
Row filtering, obtains acidification liquid；
The biochemical reaction pretreatment of S2, coking wastewater: the 0.35 ‰ of acidification liquid quality is added into acidification liquid
Composite treating agent, under conditions of 40 DEG C, with 300r/min speed stir 1h, be down to room temperature continue stir 1h, stand, mistake
Filter, obtains biochemical reaction pretreatment fluid；
The composite treating agent is mixed in dehydrated alcohol by the zinc polysilicate that mass ratio is 3:1 and processing auxiliary agent, is depressurized
Concentration is dried and is obtained；
The processing auxiliary agent is prepared by following methods, takes the potassium carbonate of 1 parts by weight and the 5- methyl pyrrole of 2 parts by weight
Piperazine -2- carboxylic acid is heated to 100 DEG C after suitable boiling water dissolution is added, and graphene oxide, 25 parts by weight of 0.5 parts by weight are added
Attapulgite and 10 parts by weight granularities be 180 mesh furfural dregs, stir 20min, be concentrated under reduced pressure, be drying to obtain processing auxiliary agent；
The biochemical reaction of S3, coking wastewater: carrying out aerobic treatment to the biochemical reaction pretreatment fluid that step S2 is obtained,
Concrete operations are as follows: the temperature for controlling aerobic treatment is 30 DEG C, and air is pumped into biochemical reaction pretreatment fluid, is guaranteed biochemical
The dissolved oxygen for reacting pretreatment fluid is 2mg/L, carries out continuity run, hydraulic detention time 10h, precipitation and separation, supernatant
As biochemical reaction liquid；
The advanced treating of S4, coking wastewater: biochemical reaction liquid quality is added into the biochemical reaction liquid that step S3 is obtained
0.1 ‰ aluminum sulfate, coagulant precipitation, precipitation and separation, supernatant are delivered to effluent collection pond through water outlet, complete coking wastewater
Advanced treatment process.
Embodiment 2
A kind of advanced treatment process of coking wastewater proposed by the present invention, comprising the following steps:
The acidification of S1, coking wastewater: coking wastewater is stored in wastewater collection pond, by coking wastewater by wastewater collection pond
It flows through grid sewage-removing machine and enters acidification reaction pond, the sulfuric acid solution that mass concentration is 15% is added into acidification reaction pond and adjusts
The pH of coking wastewater is 5, handles 3h, and the pH that the barium hydroxide solution for being 8% with mass concentration adjusts coking wastewater is 7, then into
Row filtering, obtains acidification liquid；
The biochemical reaction pretreatment of S2, coking wastewater: the 0.5 ‰ of acidification liquid quality are added into acidification liquid
Composite treating agent stirs 1.5h under conditions of 45 DEG C with 250r/min speed, is down to room temperature and continues to stir 1.5h, stands, mistake
Filter, obtains biochemical reaction pretreatment fluid；
The composite treating agent is mixed in dehydrated alcohol by the zinc polysilicate that mass ratio is 5:1 and processing auxiliary agent, is depressurized
Concentration is dried and is obtained；
The processing auxiliary agent is prepared by following methods, takes the potassium carbonate of 2 parts by weight and the 5- methyl pyrrole of 4 parts by weight
Piperazine -2- carboxylic acid is heated to 105 DEG C after suitable boiling water dissolution is added, and graphene oxide, 28 parts by weight of 1.5 parts by weight are added
Attapulgite and 13 parts by weight granularities be 200 mesh furfural dregs, stir 25min, be concentrated under reduced pressure, be drying to obtain processing auxiliary agent；
The biochemical reaction of S3, coking wastewater: carrying out aerobic treatment to the biochemical reaction pretreatment fluid that step S2 is obtained,
Concrete operations are as follows: the temperature for controlling aerobic treatment is 35 DEG C, and air is pumped into biochemical reaction pretreatment fluid, is guaranteed biochemical
The dissolved oxygen for reacting pretreatment fluid is 3mg/L, carries out continuity run, hydraulic detention time 9h, precipitation and separation, supernatant is
For biochemical reaction solution；
The advanced treating of S4, coking wastewater: biochemical reaction liquid quality is added into the biochemical reaction liquid that step S3 is obtained
0.2 ‰ aluminum sulfate, coagulant precipitation, precipitation and separation, supernatant are delivered to effluent collection pond through water outlet, complete coking wastewater
Advanced treatment process.
Embodiment 3
A kind of advanced treatment process of coking wastewater proposed by the present invention, comprising the following steps:
The acidification of S1, coking wastewater: coking wastewater is stored in wastewater collection pond, by coking wastewater by wastewater collection pond
It flows through grid sewage-removing machine and enters acidification reaction pond, the sulfuric acid solution that mass concentration is 20% is added into acidification reaction pond and adjusts
The pH of coking wastewater is 4, handles 2~5h, and the pH that the barium hydroxide solution for being 10% with mass concentration adjusts coking wastewater is 6,
It is filtered again, obtains acidification liquid；
The biochemical reaction pretreatment of S2, coking wastewater: the 0.65 ‰ of acidification liquid quality is added into acidification liquid
Composite treating agent, under conditions of 50 DEG C, with 200r/min speed stir 2h, be down to room temperature continue stir 2h, stand, mistake
Filter, obtains biochemical reaction pretreatment fluid；
The composite treating agent is mixed in dehydrated alcohol by the zinc polysilicate that mass ratio is 8:1 and processing auxiliary agent, is depressurized
Concentration is dried and is obtained；
The processing auxiliary agent is prepared by following methods, takes the potassium carbonate of 4 parts by weight and the 5- methyl pyrrole of 6 parts by weight
Piperazine -2- carboxylic acid is heated to 105 DEG C after suitable boiling water dissolution is added, and graphene oxide, 31 parts by weight of 2.5 parts by weight are added
Attapulgite and 16 parts by weight granularities be 200 mesh furfural dregs, stir 30min, be concentrated under reduced pressure, be drying to obtain processing auxiliary agent；
The biochemical reaction of S3, coking wastewater: carrying out aerobic treatment to the biochemical reaction pretreatment fluid that step S2 is obtained,
Concrete operations are as follows: the temperature for controlling aerobic treatment is 40 DEG C, and air is pumped into biochemical reaction pretreatment fluid, is guaranteed biochemical
The dissolved oxygen for reacting pretreatment fluid is 4mg/L, carries out continuity run, hydraulic detention time 8h, precipitation and separation, supernatant is
For biochemical reaction solution；
The advanced treating of S4, coking wastewater: biochemical reaction liquid quality is added into the biochemical reaction liquid that step S3 is obtained
0.3 ‰ aluminum sulfate, coagulant precipitation, precipitation and separation, supernatant are delivered to effluent collection pond through water outlet, complete coking wastewater
Advanced treatment process.
Comparative example 1
The quality such as processing auxiliary agent in embodiment 1 are substituted for zinc polysilicate, other conditions are the same as embodiment 1.
Comparative example 2
The quality such as zinc polysilicate in embodiment 1 are substituted for processing auxiliary agent, other conditions are the same as embodiment 1.
Comparative example 3
A kind of advanced treatment process of coking wastewater proposed by the present invention, comprising the following steps:
The acidification of S1, coking wastewater: coking wastewater is stored in wastewater collection pond, by coking wastewater by wastewater collection pond
It flows through grid sewage-removing machine and enters acidification reaction pond, the sulfuric acid solution that mass concentration is 10% is added into acidification reaction pond and adjusts
The pH of coking wastewater is 6, handles 5h, and the pH that the barium hydroxide solution for being 5% with mass concentration adjusts coking wastewater is 7, then into
Row filtering, obtains acidification liquid；
The biochemical reaction pretreatment of S2, coking wastewater: acidification liquid quality is added into acidification liquid
0.2625 ‰ zinc polysilicate and 0.0875 ‰ processing auxiliary agent of acidification liquid quality, under conditions of 40 DEG C, with 300r/
Min speed stirs 1h, is down to room temperature and continues to stir 1h, stand, filtering obtains biochemical reaction pretreatment fluid；
The processing auxiliary agent is prepared by following methods, takes the potassium carbonate of 1 parts by weight and the 5- methyl pyrrole of 2 parts by weight
Piperazine -2- carboxylic acid is heated to 100 DEG C after suitable boiling water dissolution is added, and graphene oxide, 25 parts by weight of 0.5 parts by weight are added
Attapulgite and 10 parts by weight granularities be 180 mesh furfural dregs, stir 20min, be concentrated under reduced pressure, be drying to obtain processing auxiliary agent；
The biochemical reaction of S3, coking wastewater: carrying out aerobic treatment to the biochemical reaction pretreatment fluid that step S2 is obtained,
Concrete operations are as follows: the temperature for controlling aerobic treatment is 30 DEG C, and air is pumped into biochemical reaction pretreatment fluid, is guaranteed biochemical
The dissolved oxygen for reacting pretreatment fluid is 2mg/L, carries out continuity run, hydraulic detention time 10h, precipitation and separation, supernatant
As biochemical reaction liquid；
The advanced treating of S4, coking wastewater: biochemical reaction liquid quality is added into the biochemical reaction liquid that step S3 is obtained
0.1 ‰ aluminum sulfate, coagulant precipitation, precipitation and separation, supernatant are delivered to effluent collection pond through water outlet, complete coking wastewater
Advanced treatment process
Respectively using the advanced treatment process of above-described embodiment 1~3 and the coking wastewater of comparative example 1~3 to same a batch
Secondary coking wastewater handled (the original water quality data of coking wastewater: COD COD be 4324mg/L, coloration be 940 times,
BOD/COD ratio is 0.21), and to detect before biochemical reaction COD content and BOD/COD ratio in water quality and complete coking wastewater
Advanced treatment process after water quality COD content and coloration, the results are shown in Table 1.
Table 1:
1 testing result of table is shown: treated that coking wastewater water quality is substantially better than comparative example 1~3 for Examples 1 to 3, implements
COD value and coloration show to GB8978-1996 " integrated wastewater discharge standard " is met in treated the coking wastewater of example 1~3
Advanced treatment process proposed by the present invention can be effectively reduced COD content and coloration in coking wastewater, and before biochemical reaction
BOD/COD ratio can be significantly improved, the biodegradability of coking wastewater is improved.
The mass ratio of zinc polysilicate in composite treating agent and processing auxiliary agent is studied, in zinc polysilicate and processing auxiliary agent
Gross mass it is constant under conditions of, by embodiment 1 zinc polysilicate and processing auxiliary agent replace according to the proportionate relationship in table 2
It changes, other conditions carry out advanced treating with embodiment 1, to the same batch coking wastewater handled with embodiment, detect advanced treating
Effluent quality afterwards the results are shown in Table 2.
Table 2:
| The mass ratio of zinc polysilicate and processing auxiliary agent | COD(mg/L) | Coloration (again) |
| 1:1 | 124 | 73 |
| 2:1 | 108 | 55 |
| 3:1 | 69 | 35 |
| 4:1 | 62 | 28 |
| 5:1 | 58 | 23 |
| 6:1 | 57 | 25 |
| 7:1 | 65 | 28 |
| 8:1 | 65 | 30 |
| 9:1 | 120 | 49 |
| 10:1 | 148 | 57 |
2 testing result of table is shown: COD in C processed waste water when the mass ratio of zinc polysilicate and processing auxiliary agent is 3~8:1
Content in 70mg/L hereinafter, and coloration at 40 times hereinafter, showing zinc polysilicate in composite treating agent and processing auxiliary agent in quality
Than to can be effectively reduced COD content and the coloration in coking wastewater, especially zinc polysilicate when 3~8:1 and handle auxiliary agent
Comprehensive treatment effect is optimal when mass ratio 5:1.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (4)
1. a kind of advanced treatment process of coking wastewater, which comprises the following steps:
The acidification of S1, coking wastewater: coking wastewater is stored in wastewater collection pond, and coking wastewater is flowed through by wastewater collection pond
Grid sewage-removing machine enters acidification reaction pond, and the sulfuric acid solution tune that mass concentration is 10%~20% is added into acidification reaction pond
The pH for saving coking wastewater is 4~6, handles 2~5h, and it is useless to adjust coking with the barium hydroxide solution that mass concentration is 5%~10%
The pH of water is 6~7, then is filtered, and acidification liquid is obtained；
S2, coking wastewater biochemical reaction pretreatment: into acidification liquid be added acidification liquid quality 0.35 ‰~
0.65 ‰ composite treating agent, under conditions of 40~50 DEG C, with 200~300r/min speed stir 1~2h, be down to room temperature after
1~2h of continuous stirring, stands, and filtering obtains biochemical reaction pretreatment fluid；
The composite treating agent by mass ratio be 3~8:1 zinc polysilicate and processing auxiliary agent mixed in dehydrated alcohol, depressurize it is dense
Contracting is dried and is obtained；
The processing auxiliary agent is prepared by following methods, takes the potassium carbonate of 1~4 parts by weight and the 5- methyl pyrrole of 2~6 parts by weight
Piperazine -2- carboxylic acid is heated to 100~105 DEG C, the graphite oxide of 0.5~2.5 parts by weight is added after suitable boiling water dissolution is added
Alkene, the attapulgite of 25~31 parts by weight and 10~16 parts by weight granularities be 180~200 mesh furfural dregs, stirring 20~
30min is concentrated under reduced pressure, is drying to obtain processing auxiliary agent；
The biochemical reaction of S3, coking wastewater: aerobic treatment is carried out to the biochemical reaction pretreatment fluid that step S2 is obtained, specifically
Operation are as follows: the temperature for controlling aerobic treatment is 30~40 DEG C, and air is pumped into biochemical reaction pretreatment fluid, is guaranteed biochemical
React pretreatment fluid dissolved oxygen be 2~4mg/L, carry out continuity run, hydraulic detention time be 8~10h, precipitation and separation,
Supernatant is biochemical reaction liquid；
The advanced treating of S4, coking wastewater: into the biochemical reaction liquid that step S3 is obtained be added biochemical reaction liquid quality 0.1 ‰~
0.3 ‰ aluminum sulfate, coagulant precipitation, precipitation and separation, supernatant are delivered to effluent collection pond through water outlet, complete coking wastewater
Advanced treatment process.
2. a kind of advanced treatment process of coking wastewater according to claim 1, which is characterized in that described in step S2
The quality of composite treating agent is the 0.5 ‰ of acidification liquid quality.
3. a kind of advanced treatment process of coking wastewater according to claim 1, which is characterized in that the composite treating agent
The mass ratio of middle zinc polysilicate and processing auxiliary agent is 5:1.
4. a kind of advanced treatment process of coking wastewater according to claim 1 or 3, which is characterized in that the processing helps
Agent includes the raw material of following parts by weight: 28 parts of attapulgite, 1.5 parts of graphene oxide, 2 parts of potassium carbonate, 5- methylpyrazine -2- carboxylic
13 parts of furfural dregs of 4 parts of acid, 200 mesh.
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Application publication date: 20190118 |