CN104402174A - Deep treatment method of coal chemical industry wastewater - Google Patents
Deep treatment method of coal chemical industry wastewater Download PDFInfo
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- CN104402174A CN104402174A CN201410705033.6A CN201410705033A CN104402174A CN 104402174 A CN104402174 A CN 104402174A CN 201410705033 A CN201410705033 A CN 201410705033A CN 104402174 A CN104402174 A CN 104402174A
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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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
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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
-
- 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
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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
-
- 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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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a deep treatment method of coal chemical industry wastewater. The treatment method of the coal chemical industry wastewater comprises the following steps: (1) carrying out biochemical treatment on the coal chemical industry wastewater; (2) carrying out membrane separation on the coal chemical industry wastewater after being subjected to the biochemical treatment to obtain primary treatment water; (3) introducing ozone into the primary treatment water to oxidize and obtain secondary treatment water; (4) processing the secondary treatment water by a biological molecular sieve to obtain tertiary treatment water; and (5) carrying out membrane filtration on the tertiary treatment water to obtain purified water. According to the deep treatment method of coal chemical industry wastewater, a membrane separation technology and a biological treatment technology make an organic combination to form a biochemical reaction system; the coal chemical industry wastewater after being subjected to the biological treatment is introduced into the system for deep treatment; the system is high in treatment load, high in compact resistance and high in capability of degrading difficultly-decomposed organic matters. The deep treatment method of coal chemical industry wastewater is low in operation cost, mature in device, convenient to operate and high in treatment efficiency; the automatic control is easy to implement; the discharged water can be directly reused.
Description
Technical field
The invention belongs to environmental technology field, be specifically related to a kind of coal chemical industrial waste water deep treatment method.
Background technology
Coal Chemical Industry, carries out chemical process to coal exactly thus the one making it produce the relevant figure such as gas, liquid is industrial.Chemical process can be divided into various ways, we can process it accordingly according to practical situation, due to the difference existed between production process and the finished product, coal chemical industrial waste water is mainly derived from and carries out these four aspects of coking, gasification, liquefaction and calcium carbide to coal.
Containing the washes that the large concentration of a lot of toxicity is higher in coal chemical industrial waste water, mainly deriving from of these materials: is carry out purifying the rear waste water produced to coal; Two is carry out reclaiming the waste water produced in process engineering to some materials; Three waste water produced when being and coking and high temperature process are carried out to coal; Four is the waste water pressurizeing to coal thus produce in the process be vaporized, and therefore contains the hazardous and noxious substances such as a large amount of phenol, cyanogen, oil, ammonia nitrogen in coal chemical industrial waste water.
In coal chemical industrial waste water, COD is generally at about 5000mg/L, ammonia nitrogen is 200 ~ 500mg/L, contained by waste water, organic pollutants comprises phenols, polycyclc aromatic compound and nitrogenous, oxygen, the heterogeneous ring compound etc. of sulphur, wherein phenolic compound and benzene-like compounds belong to easily biodegradable organics, arsenic is coughed up, naphthalene, furans, narrow azole and belong to degradable type organic, arsenic pyridine, carbazole, biphenyl, terphenyls etc. belong to the organism of difficult degradation, therefore coal chemical industrial waste water is a kind of trade effluent of the typical organic compound containing difficult degradation, thus make the outer draining COD of coal chemical industry be difficult to reach primary standard.Simultaneously there is again colourity and the very high feature of turbidity (because containing the organism of various chromophore and auxochromous group in coal chemical industrial waste water after biochemical treatment; as 3-methyl isophthalic acid; 3; 6 heptantrienes, 5-norbornylene-2-carboxylic acid, the chloro-2-norbornylene of 2-, 2-hvdroxv-benzofuran, phenol, 1-methylsulfonyl-4-methylbenzene, 3-methyl benzothiophene, naphthalene-1,8-diamines etc.).Therefore, reuse or emission standard to be reached by after coal chemical industrial waste water process, need to reduce the indexs such as COD, ammonia nitrogen, colourity and turbidity.
It is varied that coal chemical industrial waste water has composition, containing a large amount of toxic substances such as a large amount of suspended particles, and toxicity is large, concentration and colourity high, although the impact due to various factors makes the composition in waste water different, in terms of overall, cause the degree of environmental pollution all the same, pollution level is high, is difficult to effectively be solved.And show according to correlation study research, the waste water produced in the coalification industry of current China have over half without effectively process just directly discharge, toxic substance contained in these waste water causes very large pollution to our life and Working environment, therefore advanced person, efficient, energy-conservation coal chemical industrial waste water advanced treatment process how is adopted, coal chemical industrial waste water is effectively processed, avoids secondary pollution most important.
Summary of the invention
In order to solve the problem, the invention provides a kind of coal chemical industrial waste water deep treatment method, carry out reuse after advanced treatment is carried out to coal chemical industrial waste water, realizing the zero release of coal chemical industrial waste water.
A kind of coal chemical industry wastewater treating method, comprises the following steps:
(1) coal chemical industrial waste water is carried out biochemical treatment;
(2) coal chemical industrial waste water after biochemical treatment is carried out membrane sepn and obtain coagulation water;
(3) described coagulation water is passed into ozone to carry out oxidation and obtain secondary treated wastewater;
(4) described secondary treated wastewater is obtained tertiary treatment water by biological molecular sieve process;
(5) described tertiary treatment water is purified water through membrane filtration.
Membrane separation technique and biologic treating technique are organically combined the biochemical reaction system formed by the present invention, coal chemical industrial waste water after biochemical treatment is passed into this system and carries out advanced treatment, through the small-molecule substance that ozone oxidation can make the macromole hardly degraded organic substance oxidative degradation in water body become low or nontoxic, be even directly degraded into CO
2and H
2o, close to permineralization, pass through molecular sieve adsorption again, effectively can remove the heavy metal ion in waste water, the present invention by removing the organism of suspended substance in water, COD and difficult degradation after carrying out membrane sepn, catalytic ozonation, molecular sieve successively to the coal chemical industrial waste water after biochemical treatment further, thus realizes the zero release of coal chemical industrial waste water.
As preferably, in described step (1), coal chemical industrial waste water is carried out separation by membrane separation reactor and obtain described coagulation water.
As preferably, the residence time of described coagulation water in described membrane separation reactor is 2 ~ 24h, and sludge retention time is 5 ~ 35d.As more preferably, the residence time of described coagulation water in described membrane separation reactor is 8 ~ 24h, and sludge retention time is 15 ~ 35d.
As preferably, in described membrane separation reactor, mixed genetic-neural network is 5 ~ 20g/L.There is in mud special efficacy bacterium, improve biochemical reaction rate.As more preferably, in described membrane separation reactor, mixed genetic-neural network is 14 ~ 18g/L.
The intake of ozone has material impact for the macromole hardly degraded organic substance oxidative degradation effect in waste water, and as preferably, in described step (3), the feed rate of ozone is 1 ~ 3kg/h, and the time of passing into is 1 ~ 5h.As more preferably, the time that passes into of described ozone is 1 ~ 3h.
Microorganism in molecular sieve can be selected multiple, as preferably, microorganism in described biological molecular sieve is acetobacter aceti (Acetobacter aceti), acetobacter aceti liquefaction subspecies (Acetobacterliquefaciens), Bacillus coagulans (Bacillus coagulans), Pseudomonas stutzeri (Pseudomonasstutzeri), pseudomonas putida (Pseudomonas putida), one or more in plant lactobacillus (Lactobacillusplantarum) or lactobacillus rhamnosus (Lactobacillus rhamnosus).
As more preferably, the microorganism in described biological molecular sieve is one or more in Pseudomonas stutzeri (Pseudomonasstutzeri), Pseudomonas stutzeri (Pseudomonas stutzeri), lactobacillus rhamnosus (Lactobacillusrhamnosus) or acetobacter aceti (Acetobacter aceti).
Compared with prior art, beneficial effect of the present invention is embodied in:
Membrane separation technique and biologic treating technique are organically combined the biochemical reaction system formed by the present invention, coal chemical industrial waste water after biochemical treatment is passed into this system and carries out advanced treatment, processing load is large, and strong shock resistance is strong to difficult decomposing organic matter degradation capability.Running cost of the present invention is low, equipment is ripe, easy to operate, be easy to automatic control, processing efficiency is high, and water outlet can direct reuse.
Embodiment
Embodiment 1
Waste water after biochemical treatment is entered membrane separation reactor, waste water is in membrane separation reactor, active sludge in waste water after biochemical treatment and larger molecular organics are retained, wherein hydraulic detention time HRT is 2h, sludge retention time SRT is 5d, and the MLSS value of membrane bioreactor is 5g/L.Obtain coagulation water through membrane separation reactor process, wherein the COD of coagulation water is 25mg/L, and total phosphorous TP is 0.12mg/L, and total nitrogen content TN is 1.8mg/L, and heavy metal (especially Cu, Hg, Pb, Zn etc.) clearance is obvious.Again coagulation water is passed into ozone oxidation device, the feed rate of ozone is 3kg/h, and the time of passing into is 4h, and the small-molecule substance making the part hardly degraded organic substance oxidative degradation in water body become low or nontoxic, is even directly degraded into CO
2and H
2o, obtains secondary treated wastewater close to after permineralization.Again secondary treated wastewater is passed through biological molecular sieve adsorber, the heavy metal ion removed in waste water obtains tertiary treatment water, bacterial classification wherein in molecular sieve adsorber is acetobacter aceti (Acetobacter aceti), acetobacter aceti liquefaction subspecies (Acetobacter liquefaciens) and Bacillus coagulans (Bacilluscoagulans), finally by tertiary treatment water by film filter, finally process the water quality obtained and meet water environment quality standard GB3838-2002 IV class standard.
Note: in embodiment 1 use bacterial classification be market buy gained.
Embodiment 2
Waste water after biochemical treatment is entered membrane separation reactor, waste water is in membrane separation reactor, active sludge in waste water after biochemical treatment and larger molecular organics are retained, wherein hydraulic detention time HRT is 12h, sludge retention time SRT is 35d, and the MLSS value of membrane bioreactor is 15g/L.Obtain coagulation water through membrane separation reactor process, wherein the COD of coagulation water is 20mg/L, and total phosphorous TP is 0.10mg/L, and total nitrogen content TN is 1.5mg/L, and heavy metal (especially Cu, Hg, Pb, Zn etc.) clearance is obvious.Again coagulation water is passed into ozone oxidation device, the feed rate of ozone is 3kg/h, and the time of passing into is 4h, and the small-molecule substance making the part hardly degraded organic substance oxidative degradation in water body become low or nontoxic, is even directly degraded into CO
2and H
2o, obtains secondary treated wastewater close to after permineralization.Again secondary treated wastewater is passed through biological molecular sieve adsorber, the heavy metal ion removed in waste water obtains tertiary treatment water, bacterial classification wherein in molecular sieve adsorber is Bacillus coagulans (Bacillus coagulans), Pseudomonas stutzeri (Pseudomonas stutzeri), pseudomonas putida (Pseudomonas putida), plant lactobacillus (Lactobacillus plantarum) and lactobacillus rhamnosus (Lactobacillusrhamnosus), finally by tertiary treatment water by film filter, the water quality that final process obtains meets water environment quality standard GB3838-2002 III class standard.
Note: in embodiment 2 use bacterial classification be market buy gained.
Embodiment 3
Waste water after biochemical treatment is entered membrane separation reactor, waste water is in membrane separation reactor, active sludge in waste water after biochemical treatment and larger molecular organics are retained, wherein hydraulic detention time HRT is 24h, sludge retention time SRT is 25d, and the MLSS value of membrane bioreactor is 20g/L.Obtain coagulation water through membrane separation reactor process, wherein the COD of coagulation water is 15mg/L, and total phosphorous TP is 0.08mg/L, and total nitrogen content TN is 1.0mg/L, and heavy metal (especially Cu, Hg, Pb, Zn etc.) clearance is obvious.Again coagulation water is passed into ozone oxidation device, the feed rate of ozone is 3kg/h, and the time of passing into is 4h, and the small-molecule substance making the part hardly degraded organic substance oxidative degradation in water body become low or nontoxic, is even directly degraded into CO
2and H
2o, obtains secondary treated wastewater close to after permineralization.Again secondary treated wastewater is passed through biological molecular sieve adsorber, the heavy metal ion removed in waste water obtains tertiary treatment water, bacterial classification wherein in molecular sieve adsorber is Pseudomonas stutzeri (Pseudomonasstutzeri), Pseudomonas stutzeri (Pseudomonas stutzeri), lactobacillus rhamnosus (Lactobacillusrhamnosus) or acetobacter aceti (Acetobacter aceti), finally by tertiary treatment water by film filter, the water quality that final process obtains meets water environment quality standard GB3838-2002 II class standard.
Note: in embodiment 3 use bacterial classification be market buy gained.
Claims (9)
1. a coal chemical industrial waste water deep treatment method, is characterized in that, comprises the following steps:
(1) coal chemical industrial waste water is carried out biochemical treatment;
(2) coal chemical industrial waste water after biochemical treatment is carried out membrane sepn and obtain coagulation water;
(3) described coagulation water is passed into ozone to carry out oxidation and obtain secondary treated wastewater;
(4) described secondary treated wastewater is obtained tertiary treatment water by biological molecular sieve process;
(5) described tertiary treatment water is purified water through membrane filtration.
2. coal chemical industrial waste water deep treatment method as claimed in claim 1, is characterized in that, in described step (1), coal chemical industrial waste water is carried out separation by membrane separation reactor and obtain described coagulation water.
3. coal chemical industrial waste water deep treatment method as claimed in claim 2, it is characterized in that, the residence time of described coagulation water in described membrane separation reactor is 2 ~ 24h, and sludge retention time is 5 ~ 35d.
4. coal chemical industrial waste water deep treatment method as claimed in claim 3, it is characterized in that, the residence time of described coagulation water in described membrane separation reactor is 8 ~ 24h, and sludge retention time is 15 ~ 35d.
5. coal chemical industrial waste water deep treatment method as claimed in claim 2, it is characterized in that, in described membrane separation reactor, mixed genetic-neural network is 5 ~ 20g/L.
6. coal chemical industrial waste water deep treatment method as claimed in claim 5, it is characterized in that, in described membrane separation reactor, mixed genetic-neural network is 14 ~ 18g/L.
7. coal chemical industrial waste water deep treatment method as claimed in claim 1, is characterized in that, in described step (3), the feed rate of ozone is 1 ~ 3kg/h, and the time of passing into is 1 ~ 5h.
8. coal chemical industrial waste water deep treatment method as claimed in claim 1, it is characterized in that, microorganism in described biological molecular sieve is acetobacter aceti (Acetobacter aceti), acetobacter aceti liquefaction subspecies (Acetobacter liquefaciens), Bacillus coagulans (Bacillus coagulans), Pseudomonas stutzeri (Pseudomonas stutzeri), pseudomonas putida (Pseudomonas putida), one or more in plant lactobacillus (Lactobacillus plantarum) or lactobacillus rhamnosus (Lactobacillus rhamnosus).
9. coal chemical industrial waste water deep treatment method as claimed in claim 8, it is characterized in that, the microorganism in described biological molecular sieve is one or more in Pseudomonas stutzeri (Pseudomonas stutzeri), Pseudomonas stutzeri (Pseudomonas stutzeri), lactobacillus rhamnosus (Lactobacillus rhamnosus) or acetobacter aceti (Acetobacter aceti).
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104492805A (en) * | 2014-11-28 | 2015-04-08 | 云南圣清环保科技有限公司 | Soil remediation method |
| CN105384207A (en) * | 2015-12-16 | 2016-03-09 | 中科合成油技术有限公司 | Method for refrigeration condensation treatment on coal chemical industry waste water |
| CN106348541A (en) * | 2016-11-02 | 2017-01-25 | 金福兴 | Purifying treatment method of heavy-metal-containing acidic sewage |
| CN109368872A (en) * | 2018-12-03 | 2019-02-22 | 赛恩斯环保股份有限公司 | A kind of method of Tungsten smelting Sewage advanced treatment |
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| CN109368872A (en) * | 2018-12-03 | 2019-02-22 | 赛恩斯环保股份有限公司 | A kind of method of Tungsten smelting Sewage advanced treatment |
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Application publication date: 20150311 |