CN103613253B - Coal upgrading wastewater treatment process - Google Patents

Coal upgrading wastewater treatment process Download PDF

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Publication number
CN103613253B
CN103613253B CN201310681060.XA CN201310681060A CN103613253B CN 103613253 B CN103613253 B CN 103613253B CN 201310681060 A CN201310681060 A CN 201310681060A CN 103613253 B CN103613253 B CN 103613253B
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treatment
waste water
biochemical
pond
oil
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CN201310681060.XA
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CN103613253A (en
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张凯
李海波
刘晨明
林晓
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北京赛科康仑环保科技有限公司
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Abstract

The invention relates to a coal upgrading wastewater treatment process and belongs to the technical field of wastewater treatment. Aiming at the characteristics that the coal upgrading wastewater is high in content of suspended solids, difficult in settling, rich in degradation-resistant organic matters even toxic and harmful materials, high in chromaticity, and the like, the wastewater is firstly subjected to oil-removing and sand-conditioning treatment to remove most of suspended solids and oil in the wastewater, so that the impact to a subsequent biochemical system is reduced; the biochemical system comprises an anaerobic tank and an aerobiotic tank, and can further comprises an oxygen-deficient tank, wherein most of pollutants are removed in a biochemical treatment phase, and then the wastewater is disinfected through ozone oxidation, decolored, and subjected to removal of the degradation-resistant pollutants so as to reach the emission standard, and can also be recycled through a film desalting system. The coal upgrading wastewater treatment process provided by the invention has the characteristics of high process applicability, good removing effect special for pollutants, easiness for operation and great impaction resistance capacity.

Description

A kind of coal upgrading waste water treatment process
Technical field
The present invention relates to a kind of coal upgrading waste water treatment process, belong to technical field of waste water processing.
Background technology
Due to bituminous coal in world wide and anthracitic excessive exploitation, brown coal more and more receive publicity as the recycling of the low pit coal of a kind of degree of coalification.The degree of coalification of brown coal is between peat and bituminous coal, and feature is that volatile matter is high, moisture large, oxygen element content is large, and is rich in humic acid.The oxygen level higher due to it and water-content, the thermal value of brown coal is very low, and easy-weathering goes bad in atmosphere, is unfavorable for long-distance transportation and storage, generally as fuel used to generate electricity.But the thermo-efficiency of the direct combustion power generation of brown coal is low, greenhouse gas emissions are large, are difficult to large-scale develop and utilize.If brown coal will be difficult to the specification of quality meeting user without upgrading processing, therefore brown coal upgrading is the prerequisite that brown coal effectively utilize.
Water content height is one of principal character of brown coal, so dehydrating brown coal is the requisite link of brown coal upgrading.In dehydration, the moisture in brown coal and volatile matter are by entering formation waste water in the process for upgrading such as immersion, evaporation, condensation, and a large amount of suspension brown coal particles and suspended substance also enter into waste water simultaneously, define coal upgrading waste water.The principal character of coal upgrading waste water is: suspension object height, be difficult to sedimentation, and be rich in hardly degraded organic substance or even hazardous and noxious substances, colourity is high.The technology of such waste water of development process is of great importance to brown coal upgrading industry development.
Due to brown coal upgrading research worldwide carry out soon, the treatment process of its processing wastewater or the report of reuse method less.In CN102358649A, disclose a kind for the treatment of process of flocculation-absorption, its step is the pH regulating waste water, then carries out flocculation sediment, then utilizes the brown coal after upgrading to adsorb as sorbent material, eventually pass charcoal absorption and remove pollutent, the advantage of this patent is that technical process is short, simple to operate, but this technique is only shifted by pollutent, fail to degrade, sorbent material desorb after stain thing still exists; In addition, this technique needs adjust ph repeatedly, adds reagent consumption.CN102506575A adopts incineration technology to processing containing steam exhaust of producing in brown coal grading process, after process, reclamation of condensate water utilizes, the feature of this technique is that equipment is simple, processing cost is low, shortcoming is that steam takes away amount of heat in burning process, and heat utilization rate certainly will incur loss; In addition, after the vapor condensation burned, water containing certain pollutent, can not can be arranged outward.
Summary of the invention
The object of the present invention is to provide a kind of simple to operate, can pollutent is degradable, process waste water energy qualified discharge or the coal upgrading waste water treatment process of reuse.
First waste water remove suspended substances most in waste water and oils through the process of oil removing sand setting, reduces the impact to subsequent biochemical system; Biochemical system comprises anaerobic pond, Aerobic Pond, can also comprise anoxic pond, most pollutent was removed in the biochemical treatment stage, and then waste water carries out disinfection through ozone oxidation, decolours and remove Recalcitrant chemicals, reach emission standard, also can carry out Treatment for Reuse through film desalination system.
For reaching this object, the present invention by the following technical solutions:
A kind of coal upgrading waste water treatment process, reaches emission standard successively by coal upgrading waste water after the process of oil removing sand setting, biochemical treatment and advanced treatment.
The present invention will reach waste water reuse after film desalting treatment of emission standard after advanced treatment.The waste water reaching emission standard can meet recycle water standard after film desalting treatment.
The each processing steps such as oil removing sand setting of the present invention process, biochemical treatment, advanced treatment and film desalting treatment all can be obtained separately from prior art by those skilled in the art.Improvement of the present invention is mainly efficiently to be processed coal upgrading waste water by rational combination process.
The chemical sludge produced in treating processes and biochemical sludge enter sludge treating system and process.Sludge treating system of the present invention can be selected the technique of sludge treatment from prior art by those skilled in the art.Preferably, described sludge treating system adopts belt filter press, plate-and-frame filter press or horizontal screw centrifuge to carry out concentration to mud.
Oil removing sand setting of the present invention is treated to: waste water is after naturally clarifying, and in upper liquid, add the mixing of oil removing sand setting medicament, then enter mud-water separation region, supernatant liquor enters biochemical treatment system.
The residence time of described clarification is naturally 2 ~ 5h, such as, can select 2.01 ~ 4.96h, 2.2 ~ 4.6h, 2.48 ~ 4.23h, 2.8 ~ 4.1h, 2.95 ~ 3.86h, 3 ~ 3.6h, 3.23h etc., further preferred 3h.
Described oil removing sand setting medicament is bodied ferric sulfate and polyacrylamide.Preferably, the dosage of described bodied ferric sulfate and polyacrylamide is respectively 500 ~ 1500ml/L and 10 ~ 30mg/L.
Described mud-water separation adopts radical sedimentation basin or inclined plate sedimentation pond.
Biochemical treatment of the present invention is: the supernatant liquor after the process of oil removing sand setting is entered biochemical treatment system, utilizes the most pollutents in the biochemical reaction of microorganism removal waste water.
Described biochemical treatment system comprises anaerobic pond and Aerobic Pond successively.Preferably, the residence time of waste water in anaerobic pond is 6 ~ 15h, such as, can select 6.02 ~ 14.89h, 6.4 ~ 12.3h, 7 ~ 11h, 7.46 ~ 10.7h, 7.9 ~ 10.3h, 8.2 ~ 9.9h, 8.75 ~ 9.3h, 9.02h etc., further preferred 10h.Preferably, the residence time of waste water in Aerobic Pond is 30 ~ 70h, such as, can select 30.01 ~ 69.8h, 34 ~ 65h, 38.5 ~ 62.3h, 42 ~ 60h, 46.7 ~ 58.1h, 48 ~ 55h, 50.2 ~ 53h, 52 etc., further preferred 45h.
Described biochemical treatment system also comprises the anoxic pond between anaerobic pond and Aerobic Pond.Anoxic pond is relative anaerobic and aerobic, generally refers to that dissolved oxygen controls the biochemical system between 0.2 ~ 0.5mg/L.Preferably, the residence time of waste water in anoxic pond is 3 ~ 12h, such as, can select 3.02 ~ 11.8h, 3.8 ~ 10.5h, 5 ~ 9h, 5.34 ~ 8.67h, 5.8 ~ 8.2h, 6.2 ~ 7.5h, 7h etc., further preferred 8h.
Described Aerobic Pond mud is 1:1 ~ 3:1 to the reflux ratio of Aerobic Pond feed-water end, such as, can select 1.02:1 ~ 2.96:1,1.3:1 ~ 2.6:1,1.6:1 ~ 2.3:1,1.85:1 ~ 2.1:1,2:1 etc., further preferred 2:1.
Described Aerobic Pond effluent recycling is 0.5:1 ~ 2:1 to the reflux ratio of anoxic pond, such as, can select 0.51:1 ~ 1.96:1,0.7:1 ~ 1.7:1,0.85:1 ~ 1.5:1,1:1 ~ 1.35:1,1.2:1 etc., further preferred 1.5:1.
Described advanced treatment is: by described biochemical treatment water outlet after coagulation, multi-medium filtering, then carries out disinfection through ozone oxidation, decolour and remove Recalcitrant chemicals.
Preferably, described ozone oxidation reaction temperature is 20 ~ 50 DEG C, such as, can select 20.02 ~ 49.6 DEG C, 23 ~ 46 DEG C, 26.7 ~ 42.3 DEG C, 29 ~ 40.5 DEG C, 31.2 ~ 38.6 DEG C, 33 ~ 36 DEG C, 34.5 DEG C etc., preferably 25 DEG C further.
Preferably, the pH of described ozone oxidation reaction is 5 ~ 8, such as, can select 5.02 ~ 7.98,5.3 ~ 7.7,5.56 ~ 7.45,5.8 ~ 7.2,6.2 ~ 7,6.5 etc., further preferably 7.
Preferably, the hydraulic detention time of described ozone oxidation reaction is 10 ~ 60min, such as, can select 10.02 ~ 59.6min, 13 ~ 58min, 18 ~ 55min, 22.5 ~ 52min, 26 ~ 50min, 30 ~ 48.5min, 34 ~ 43min, 38min etc., further preferred 30min.
Preferably, ozone catalyst SKO3-1 and/or ozone catalyst SKO3-2 is added in described ozone Oxidation Treatment.Ozone catalyst SKO3-1 of the present invention, ozone catalyst SKO3-2 are developed by Chinese Academy Of Sciences Process Engineering Research Institute, can commercially availablely obtain.
Described film desalting treatment is: described advanced treatment water outlet is entered film processing system and carries out desalination.
Preferably, described film processing system comprises the combination of two or three in ultrafiltration, nanofiltration or reverse osmosis.Typical but non-limiting example comprises: the combination procesies such as ultrafiltration+nanofiltration, ultrafiltration+reverse osmosis, ultrafiltration+nanofiltration+reverse osmosis.
A kind of coal upgrading waste water treatment process, described treatment process comprises the steps:
(1) oil removing sand setting process
Waste water is after naturally clarifying, and in upper liquid, add the mixing of oil removing sand setting medicament, then enter mud-water separation region, supernatant liquor enters biochemical treatment, and mud enters sludge treating system and processes;
(2) biochemical treatment
Supernatant liquor after the process of oil removing sand setting is entered biochemical treatment system, utilizes the most pollutents in the biochemical reaction of microorganism removal waste water; Described biochemical treatment system comprises anaerobic pond and Aerobic Pond successively;
(3) advanced treatment
By described biochemical treatment water outlet after coagulation, multi-medium filtering, then carry out disinfection through ozone oxidation, decolour and remove Recalcitrant chemicals;
(4) film desalting treatment
Described advanced treatment water outlet is entered film processing system desalination; Described film processing system comprises the combination of two or three in ultrafiltration, nanofiltration or reverse osmosis.
Particularly, the invention provides a kind of coal upgrading waste water treatment process, described treatment process condition comprises the steps: after optimizing
(1) oil removing sand setting process
Waste water is after naturally clarifying 2 ~ 5h, and in upper liquid, add the mixing of oil removing sand setting medicament, then enter mud-water separation region, supernatant liquor enters biochemical treatment, and mud enters sludge treating system and carries out concentration;
(2) biochemical treatment
Supernatant liquor after the process of oil removing sand setting is entered biochemical treatment system, utilizes the most pollutents in the biochemical reaction of microorganism removal waste water; Described biochemical treatment system comprises anaerobic pond and Aerobic Pond successively; The residence time of waste water in anaerobic pond is 6 ~ 15h, and the residence time of waste water in Aerobic Pond is 30 ~ 70h; Described Aerobic Pond mud is 1:1 ~ 3:1 to the reflux ratio of Aerobic Pond feed-water end;
(3) advanced treatment
By described biochemical treatment water outlet after coagulation, multi-medium filtering, then carry out disinfection through ozone oxidation, decolour and remove Recalcitrant chemicals; Described ozone oxidation reaction temperature is 20 ~ 50 DEG C, and pH is 5 ~ 8, and hydraulic detention time is 10 ~ 60min;
(4) film desalting treatment
Described advanced treatment water outlet is entered film processing system desalination; Described film processing system comprises the combination of two or three in ultrafiltration, nanofiltration or reverse osmosis.
Compared with prior art scheme, the present invention has following beneficial effect:
Coal upgrading waste water treatment process provided by the invention has that technique suitability is strong, the special removal effect of pollutent is good, easy to operate, the feature of strong shock resistance.
Apply coal upgrading waste water treatment process of the present invention to process coal upgrading waste water, first, the most suspended substance in waste water and oils are removed by the pre-treatment of oil removing sand setting, ensure that the steady running of subsequent disposal; Secondly, the present invention can according to the change of waste water quality with to the requirement of producing water water quality, and select different treatment process, multiprocessing operation synergic adjustment, suits measures to local conditions, farthest save running cost; Finally, present invention process can reduce adding of medicament, reduces the load of follow-up desalting treatment.
Accompanying drawing explanation
Fig. 1 is the process flow sheet of the coal upgrading waste water treatment process described in the embodiment of the present invention 1,2;
Fig. 2 is the process flow sheet of the coal upgrading waste water treatment process described in the embodiment of the present invention 3,4.
The present invention is described in more detail below.But following example is only simple and easy example of the present invention, and do not represent or limit the scope of the present invention, protection scope of the present invention is as the criterion with claims.
Embodiment
Technical scheme of the present invention is further illustrated by embodiment below in conjunction with accompanying drawing.
For better the present invention being described, be convenient to understand technical scheme of the present invention, typical but non-limiting embodiment of the present invention is as follows:
Embodiment 1
A kind of coal upgrading waste water treatment process, comprises the steps:
(1) oil removing sand setting process
Waste water is after naturally clarifying 5h, and in upper liquid, add the mixing of oil removing sand setting medicament, then enter mud-water separation region, supernatant liquor enters biochemical treatment, and mud enters sludge treating system and carries out concentration by belt filter press; Described oil removing sand setting medicament is bodied ferric sulfate and polyacrylamide, and both dosages are respectively 1500ml/L and 10mg/L; Mud-water separation can adopt radical sedimentation basin;
(2) biochemical treatment
Supernatant liquor after the process of oil removing sand setting is entered biochemical treatment system, utilizes the most pollutents in the biochemical reaction of microorganism removal waste water; Described biochemical treatment system comprises anaerobic pond and Aerobic Pond successively; The residence time of waste water in anaerobic pond is 15h, and the residence time of waste water in Aerobic Pond is 30h; Described Aerobic Pond mud is 1:1 to the reflux ratio of Aerobic Pond feed-water end;
(3) advanced treatment
By described biochemical treatment water outlet after coagulation, multi-medium filtering, then carry out disinfection through ozone oxidation, decolour and remove Recalcitrant chemicals; Described ozone oxidation reaction temperature is 50 DEG C, and pH is 5, and hydraulic detention time is 60min; Ozone catalyst KL-CO3 is added in ozone Oxidation Treatment;
(4) film desalting treatment
Described advanced treatment water outlet is entered film processing system desalination; Described film processing system comprises ultrafiltration and nanofiltration.
Embodiment 2
A kind of coal upgrading waste water treatment process, comprises the steps:
(1) oil removing sand setting process
Waste water is after naturally clarifying 2h, and in upper liquid, add the mixing of oil removing sand setting medicament, then enter mud-water separation region, supernatant liquor enters biochemical treatment, and mud enters sludge treating system and carries out concentration by horizontal screw centrifuge; Described oil removing sand setting medicament is bodied ferric sulfate and polyacrylamide, and both dosages are respectively 500ml/L and 30mg/L; Mud-water separation can adopt inclined plate sedimentation pond;
(2) biochemical treatment
Supernatant liquor after the process of oil removing sand setting is entered biochemical treatment system, utilizes the most pollutents in the biochemical reaction of microorganism removal waste water; Described biochemical treatment system comprises anaerobic pond and Aerobic Pond successively; The residence time of waste water in anaerobic pond is 6h, and the residence time of waste water in Aerobic Pond is 70h; Described Aerobic Pond mud is 3:1 to the reflux ratio of Aerobic Pond feed-water end;
(3) advanced treatment
By described biochemical treatment water outlet after coagulation, multi-medium filtering, then carry out disinfection through ozone oxidation, decolour and remove Recalcitrant chemicals; Described ozone oxidation reaction temperature is 20 DEG C, and pH is 8, and hydraulic detention time is 10min; Ozone catalyst SKO3-2 is added in ozone Oxidation Treatment;
(4) film desalting treatment
Described advanced treatment water outlet is entered film processing system desalination; Described film processing system comprises ultrafiltration and reverse osmosis.
Embodiment 3
A kind of coal upgrading waste water treatment process, comprises the steps:
(1) oil removing sand setting process
Waste water is after naturally clarifying 3h, and in upper liquid, add the mixing of oil removing sand setting medicament, then enter mud-water separation region, supernatant liquor enters biochemical treatment, and mud enters sludge treating system and carries out concentration by plate-and-frame filter press; Described oil removing sand setting medicament is bodied ferric sulfate and polyacrylamide, and both dosages are respectively 1000ml/L and 15mg/L; Mud-water separation can adopt radical sedimentation basin;
(2) biochemical treatment
Supernatant liquor after the process of oil removing sand setting is entered biochemical treatment system, utilizes the most pollutents in the biochemical reaction of microorganism removal waste water; Described biochemical treatment system comprises anaerobic pond, anoxic pond and Aerobic Pond successively; The residence time of waste water in anaerobic pond is 10h, and the residence time of waste water in Aerobic Pond is 45h; The residence time of waste water in anoxic pond is 12h, and described Aerobic Pond mud is 2:1 to the reflux ratio of Aerobic Pond feed-water end; Described Aerobic Pond effluent recycling is 2:1 to the reflux ratio of anoxic pond;
(3) advanced treatment
By described biochemical treatment water outlet after coagulation, multi-medium filtering, then after carrying out disinfection through ozone oxidation, decolouring and remove Recalcitrant chemicals, a discharge part; Described ozone oxidation reaction temperature is 35 DEG C, and pH is 6, and hydraulic detention time is 30min; Ozone catalyst SKO3-1 and ozone catalyst SKO3-2 is added in ozone Oxidation Treatment;
(4) film desalting treatment
The water outlet of described advanced treatment residue is entered film processing system desalination; Described film processing system comprises ultrafiltration, nanofiltration and reverse osmosis.
Embodiment 4
A kind of coal upgrading waste water treatment process, comprises the steps:
(1) oil removing sand setting process
Waste water is after naturally clarifying 4h, and in upper liquid, add the mixing of oil removing sand setting medicament, then enter mud-water separation region, supernatant liquor enters biochemical treatment, and mud enters sludge treating system and carries out concentration by belt filter press; Described oil removing sand setting medicament is bodied ferric sulfate and polyacrylamide, and both dosages are respectively 800ml/L and 20mg/L; Mud-water separation can adopt inclined plate sedimentation pond;
(2) biochemical treatment
Supernatant liquor after the process of oil removing sand setting is entered biochemical treatment system, utilizes the most pollutents in the biochemical reaction of microorganism removal waste water; Described biochemical treatment system comprises anaerobic pond, anoxic pond and Aerobic Pond successively; The residence time of waste water in anaerobic pond is 10h, and the residence time of waste water in Aerobic Pond is 50h; The residence time of waste water in anoxic pond is 3h, and described Aerobic Pond mud is 1.5:1 to the reflux ratio of Aerobic Pond feed-water end; Described Aerobic Pond effluent recycling is 0.5:1 to the reflux ratio of anoxic pond;
(3) advanced treatment
By described biochemical treatment water outlet after coagulation, multi-medium filtering, then after carrying out disinfection through ozone oxidation, decolouring and remove Recalcitrant chemicals, a discharge part; Described ozone oxidation reaction temperature is 40 DEG C, and pH is 7, and hydraulic detention time is 45min; Ozone catalyst SKO3-1 is added in ozone Oxidation Treatment;
(4) film desalting treatment
The water outlet of described advanced treatment residue is entered film processing system desalination; Described film processing system comprises ultrafiltration, nanofiltration and reverse osmosis.
Specific embodiment 1
Coal upgrading waste water treatment process of the present invention is adopted to carry out pilot scale, as shown in Figure 1.Treatment capacity is 100m 3/ d, former water COD crbe 1500 ~ 2000mg/L, suspended substance is 1000 ~ 2000mg/L, and through the process of oil removing sand setting, suspended substance is reduced to below 100mg/L, and water quality is clarified, and enters follow-up anaerobic pond-Aerobic Pond subsequently and carries out biochemical treatment, COD crbe reduced to about 150mg/L, then carry out advanced treatment-film desalting treatment, produce water as circulating cooling make-up water reuse.
Specific embodiment 2
Adopt coal upgrading waste water treatment process process coal upgrading waste water of the present invention, as shown in Figure 2.Treatment capacity is 3000m 3/ d, former water COD crbe 1500 ~ 3000mg/L, suspended substance is 1000 ~ 2000mg/L, removes most suspended substance, COD through the process of oil removing sand setting crbe reduced to 1300 ~ 2500mg/L, for reducing change of water quality to the impact of biochemical system, biochemical treatment adopts the processing mode of anaerobic pond-anoxic pond-Aerobic Pond, and stable effluent quality, pollutants removal rate is high, bio-chemical effluent COD crbe reduced to 100 ~ 200mg/L, then through coagulating treatment and the ozone Oxidation Treatment comprising catalyzer, water outlet COD cr≤ 50mg/L, meets emission standard, directly discharges 2000m 3/ d; Remaining 1000m 3the waste water of/d, through ozone sterilization, reduces the fouling membrane of subsequent film desalination system, and film desalination system produces water 800m 3/ d is as coal process for upgrading Water circulation.
Applicant states, the present invention illustrates treatment process of the present invention by above-described embodiment, but the present invention is not limited to above-mentioned processing step, does not namely mean that the present invention must rely on above-mentioned processing step and could implement.Person of ordinary skill in the field should understand, any improvement in the present invention, to equivalence replacement and the interpolation of ancillary component, the concrete way choice etc. of raw material selected by the present invention, all drops within protection scope of the present invention and open scope.
More than describe the preferred embodiment of the present invention in detail; but the present invention is not limited to the detail in above-mentioned embodiment, within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each concrete technical characteristic described in above-mentioned embodiment, in reconcilable situation, can be combined by any suitable mode, in order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible array mode.
In addition, also can carry out arbitrary combination between various different embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.

Claims (21)

1. a coal upgrading waste water treatment process, is characterized in that, coal upgrading waste water is reached emission standard successively after the process of oil removing sand setting, biochemical treatment and advanced treatment;
Described oil removing sand setting is treated to: waste water is after naturally clarifying, and in upper liquid, add the mixing of oil removing sand setting medicament, then enter mud-water separation region, supernatant liquor enters biochemical treatment system;
Described oil removing sand setting medicament is bodied ferric sulfate and polyacrylamide; The dosage of described bodied ferric sulfate and polyacrylamide is respectively 500 ~ 1500ml/L and 10 ~ 30mg/L;
Described biochemical treatment is: the supernatant liquor after the process of oil removing sand setting is entered biochemical treatment system, utilizes the pollutent in the biochemical reaction removal waste water of microorganism;
Described biochemical treatment system comprises anaerobic pond and Aerobic Pond successively;
The residence time of waste water in anaerobic pond is 6 ~ 15h; The residence time of waste water in Aerobic Pond is 30 ~ 70h;
Described biochemical treatment system also comprises the anoxic pond between anaerobic pond and Aerobic Pond; The residence time of waste water in anoxic pond is 3 ~ 12h;
Described Aerobic Pond mud is 1:1 ~ 3:1 to the reflux ratio of Aerobic Pond feed-water end; Described Aerobic Pond effluent recycling is 0.5:1 ~ 2:1 to the reflux ratio of anoxic pond;
Described advanced treatment is: by described biochemical treatment water outlet after coagulation, multi-medium filtering, then carries out disinfection through ozone oxidation, decolour and remove Recalcitrant chemicals.
2. treatment process as claimed in claim 1, is characterized in that, will reach waste water reuse after film desalting treatment of emission standard after advanced treatment.
3. treatment process as claimed in claim 1 or 2, it is characterized in that, the chemical sludge produced in treating processes and biochemical sludge enter sludge treating system and process.
4. treatment process as claimed in claim 3, is characterized in that, described sludge treating system adopts belt filter press, plate-and-frame filter press or horizontal screw centrifuge to carry out concentration to mud.
5. treatment process as claimed in claim 1, is characterized in that, the residence time of described clarification is naturally 2 ~ 5h.
6. treatment process as claimed in claim 5, is characterized in that, the residence time of described clarification is naturally 3h.
7. treatment process as claimed in claim 1, is characterized in that, described mud-water separation adopts radical sedimentation basin or inclined plate sedimentation pond.
8. treatment process as claimed in claim 1, it is characterized in that, the residence time of waste water in anaerobic pond is 10h.
9. treatment process as claimed in claim 1, it is characterized in that, the residence time of waste water in Aerobic Pond is 45h.
10. treatment process as claimed in claim 1, it is characterized in that, the residence time of waste water in anoxic pond is 8h.
11. treatment process as claimed in claim 1, is characterized in that, described Aerobic Pond mud is 2:1 to the reflux ratio of Aerobic Pond feed-water end.
12. treatment process as claimed in claim 1, is characterized in that, described Aerobic Pond effluent recycling is 1.5:1 to the reflux ratio of anoxic pond.
13. treatment process as claimed in claim 1, it is characterized in that, described ozone oxidation reaction temperature is 20 ~ 50 DEG C.
14. treatment process as claimed in claim 13, it is characterized in that, described ozone oxidation reaction temperature is 25 DEG C.
15. treatment process as claimed in claim 1, is characterized in that, the pH of described ozone oxidation reaction is 5 ~ 8.
16. treatment process as claimed in claim 15, is characterized in that, the pH of described ozone oxidation reaction is 7.
17. treatment process as claimed in claim 1, is characterized in that, the hydraulic detention time of described ozone oxidation reaction is 10 ~ 60min.
18. treatment process as claimed in claim 17, is characterized in that, the hydraulic detention time of described ozone oxidation reaction is 30min.
19. treatment process as claimed in claim 2, it is characterized in that, described film desalting treatment is: described advanced treatment water outlet is entered film processing system and carries out desalination.
20. treatment process as claimed in claim 19, it is characterized in that, described film processing system comprises the combination of two or three in ultrafiltration, nanofiltration or reverse osmosis.
21. treatment process as claimed in claim 1, it is characterized in that, described treatment process comprises the steps:
(1) oil removing sand setting process
Waste water is after naturally clarifying, and in upper liquid, add the mixing of oil removing sand setting medicament, then enter mud-water separation region, supernatant liquor enters biochemical treatment, and mud enters sludge treating system and processes;
(2) biochemical treatment
Supernatant liquor after the process of oil removing sand setting is entered biochemical treatment system, utilizes the most pollutents in the biochemical reaction of microorganism removal waste water; Described biochemical treatment system comprises anaerobic pond and Aerobic Pond successively;
(3) advanced treatment
By described biochemical treatment water outlet after coagulation, multi-medium filtering, then carry out disinfection through ozone oxidation, decolour and remove Recalcitrant chemicals;
(4) film desalting treatment
Described advanced treatment water outlet is entered film processing system desalination; Described film processing system comprises the combination of two or three in ultrafiltration, nanofiltration or reverse osmosis.
CN201310681060.XA 2013-12-12 2013-12-12 Coal upgrading wastewater treatment process CN103613253B (en)

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CN106277358A (en) * 2016-08-29 2017-01-04 湖北宜化集团有限责任公司 The flocculant of a kind of quasi-east coal chemical industrial waste water process and processing method thereof
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