CN103613253A - Coal upgrading wastewater treatment process - Google Patents
Coal upgrading wastewater treatment process Download PDFInfo
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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
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.Due to its higher oxygen level and water-content, the thermal value of brown coal is very low, and in air, easy-weathering is rotten, 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, and greenhouse gas emissions are large, be difficult to large-scale develop and utilize.If brown coal will be difficult to meet user's specification of quality without upgrading processing, so brown coal upgrading is the prerequisite that brown coal effectively utilize.
Water content height is one of principal character of brown coal, so brown coal are dehydrated, 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 particle and suspended substances also enters into waste water simultaneously, formed coal upgrading waste water.The principal character of coal upgrading waste water is: suspension object height, be difficult to sedimentation, 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.
Because brown coal upgrading research is worldwide carried out soon, the treatment process of its processing wastewater or the report of reuse method are less.In CN102358649A, a kind for the treatment of process of flocculation-absorption is disclosed, its step is the pH of adjusting waste water, then carries out flocculation sediment, then utilizes the brown coal after upgrading to adsorb as sorbent material, finally by crossing gac Adsorption pollutent, the advantage of this patent is that technical process is short, simple to operate, but this technique is only that pollutent is shifted, fail to degrade, sorbent material desorb after stain thing still exists; In addition, this technique need to regulate pH value repeatedly, has increased reagent consumption.CN102506575A adopts incineration technology to processing containing steam waste gas of producing in brown coal upgrading process, reclamation of condensate water utilization after processing, the feature of this technique is that equipment is simple, processing cost is low, shortcoming is that steam is taken away amount of heat in burning process, and heat utilization rate certainly will incur loss; In addition, after the vapor condensation burning, water can contain certain pollutent, can not arrange 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 the coal upgrading waste water treatment process of waste water energy qualified discharge or reuse.
First waste water processed and removed suspended substance and oils most in waste water through oil removing sand setting, reduces the impact to follow-up biochemical system; Biochemical system comprises anaerobic pond, Aerobic Pond, can also comprise anoxic pond, most pollutents were removed in the biochemical treatment stage, and then waste water carries out disinfection, decolours and remove difficult degradation pollutent through ozone oxidation, 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 coal upgrading waste water treatment process reaches emission standard successively by coal upgrading waste water after the processing 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 that reaches emission standard can meet reuse water standard after film desalting treatment.
Each treatment process such as oil removing sand setting of the present invention processing, biochemical treatment, advanced treatment and film desalting treatment all can be obtained separately by those skilled in the art from prior art.Improvement of the present invention is mainly by rational combination process, coal upgrading waste water efficiently to be processed.
The chemical sludge producing in treating processes and biochemical sludge enter sludge treating system and process.Sludge treating system of the present invention can be selected by those skilled in the art the technique of sludge treatment from prior 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, after naturally clarifying, adds oil removing sand setting medicament to mix in the liquid of upper strata, then enters mud-water separation region, and supernatant liquor enters biochemical treatment system.
The described residence time of clarification is naturally 2～5h, for example, 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 oil removing sand setting is processed enters biochemical treatment system, utilizes the biochemical reaction of microorganism to remove the most pollutents in 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, for example, 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, for example, 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 is controlled at the biochemical system between 0.2～0.5mg/L.Preferably, the residence time of waste water in anoxic pond is 3～12h, for example, 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 to the reflux ratio of Aerobic Pond feed-water end is 1:1～3:1, for example, 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 to the reflux ratio of anoxic pond is 0.5:1～2:1, for example, 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: described biochemical treatment water outlet, after coagulation, multi-medium filtering, then is carried out disinfection, decoloured and remove difficult degradation pollutent through ozone oxidation.
Preferably, described ozone oxidation reaction temperature is 20～50 ℃, for example, can select 20.02～49.6 ℃, 23～46 ℃, and 26.7～42.3 ℃, 29～40.5 ℃, 31.2～38.6 ℃, 33～36 ℃, 34.5 ℃ etc., further preferably 25 ℃.
Preferably, the pH of described ozone oxidation reaction is 5～8, for example, 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, for example, 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, in described ozone Oxidation Treatment, add ozone catalytic agent SKO3-1 and/or ozone catalytic agent SKO3-2.Ozone catalytic agent SKO3-1 of the present invention, the exploitation of ozone catalytic agent SKO3-2 Shi You Chinese Academy Of Sciences Process Engineering Research Institute, can commercially availablely obtain.
Described film desalting treatment is: described advanced treatment water outlet is entered to film processing system and carry 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 coal upgrading waste water treatment process, described treatment process comprises the steps:
(1) oil removing sand setting is processed
Waste water, after naturally clarifying, adds oil removing sand setting medicament to mix in the liquid of upper strata, then enters mud-water separation region, and supernatant liquor enters biochemical treatment, and mud enters sludge treating system and processes;
(2) biochemical treatment
Supernatant liquor after oil removing sand setting is processed enters biochemical treatment system, utilizes the biochemical reaction of microorganism to remove the most pollutents in waste water; Described biochemical treatment system comprises anaerobic pond and Aerobic Pond successively;
(3) advanced treatment
Described biochemical treatment water outlet, after coagulation, multi-medium filtering, then is carried out disinfection, decoloured and remove difficult degradation pollutent through ozone oxidation;
(4) film desalting treatment
Described advanced treatment water outlet is entered to 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 is processed
Waste water, through naturally clarifying after 2～5h, adds oil removing sand setting medicament to mix in the liquid of upper strata, then enters mud-water separation region, and supernatant liquor enters biochemical treatment, and mud enters sludge treating system and carries out concentration;
(2) biochemical treatment
Supernatant liquor after oil removing sand setting is processed enters biochemical treatment system, utilizes the biochemical reaction of microorganism to remove the most pollutents in 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 to the reflux ratio of Aerobic Pond feed-water end is 1:1～3:1;
(3) advanced treatment
Described biochemical treatment water outlet, after coagulation, multi-medium filtering, then is carried out disinfection, decoloured and remove difficult degradation pollutent through ozone oxidation; Described ozone oxidation reaction temperature is 20～50 ℃, and pH is 5～8, and hydraulic detention time is 10～60min;
(4) film desalting treatment
Described advanced treatment water outlet is entered to film processing system desalination; Described film processing system comprises the combination of two or three in ultrafiltration, nanofiltration or reverse osmosis.
Compare 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 coal upgrading waste water is processed, first, the most suspended substances in waste water and oils are removed in the pre-treatment of oil removing sand setting, have guaranteed the steady running of subsequent disposal; Secondly, the present invention can select different treatment process according to the variation of waste water quality with to producing the requirement of water water quality, and multiprocessing operation is collaborative to be regulated, and suits measures to local conditions, and farthest saves running cost; Finally, technique of the present invention 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.
Below the present invention is described in more detail.But following example is only simple and easy example of the present invention, does not represent or limit the scope of the present invention, and protection scope of the present invention is as the criterion with claims.
Embodiment
Below in conjunction with accompanying drawing and by embodiment, further illustrate technical scheme of the present invention.
For the present invention is described better, 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 coal upgrading waste water treatment process, comprises the steps:
(1) oil removing sand setting is processed
Waste water, through naturally clarifying after 5h, adds oil removing sand setting medicament to mix in the liquid of upper strata, then enters mud-water separation region, and 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 oil removing sand setting is processed enters biochemical treatment system, utilizes the biochemical reaction of microorganism to remove the most pollutents in 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 to the reflux ratio of Aerobic Pond feed-water end is 1:1;
(3) advanced treatment
Described biochemical treatment water outlet, after coagulation, multi-medium filtering, then is carried out disinfection, decoloured and remove difficult degradation pollutent through ozone oxidation; Described ozone oxidation reaction temperature is 50 ℃, and pH is 5, and hydraulic detention time is 60min; In ozone Oxidation Treatment, add ozone catalytic agent KL-CO3;
(4) film desalting treatment
Described advanced treatment water outlet is entered to film processing system desalination; Described film processing system comprises ultrafiltration and nanofiltration.
Embodiment 2
A coal upgrading waste water treatment process, comprises the steps:
(1) oil removing sand setting is processed
Waste water, through naturally clarifying after 2h, adds oil removing sand setting medicament to mix in the liquid of upper strata, then enters mud-water separation region, and 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 oil removing sand setting is processed enters biochemical treatment system, utilizes the biochemical reaction of microorganism to remove the most pollutents in 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 to the reflux ratio of Aerobic Pond feed-water end is 3:1;
(3) advanced treatment
Described biochemical treatment water outlet, after coagulation, multi-medium filtering, then is carried out disinfection, decoloured and remove difficult degradation pollutent through ozone oxidation; Described ozone oxidation reaction temperature is 20 ℃, and pH is 8, and hydraulic detention time is 10min; In ozone Oxidation Treatment, add ozone catalytic agent SKO3-2;
(4) film desalting treatment
Described advanced treatment water outlet is entered to film processing system desalination; Described film processing system comprises ultrafiltration and reverse osmosis.
Embodiment 3
A coal upgrading waste water treatment process, comprises the steps:
(1) oil removing sand setting is processed
Waste water, through naturally clarifying after 3h, adds oil removing sand setting medicament to mix in the liquid of upper strata, then enters mud-water separation region, and 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 oil removing sand setting is processed enters biochemical treatment system, utilizes the biochemical reaction of microorganism to remove the most pollutents in 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 to the reflux ratio of Aerobic Pond feed-water end is 2:1; Described Aerobic Pond effluent recycling to the reflux ratio of anoxic pond is 2:1;
(3) advanced treatment
Described biochemical treatment water outlet, after coagulation, multi-medium filtering, then is carried out disinfection, decoloured and remove after difficult degradation pollutent through ozone oxidation, a discharge part; Described ozone oxidation reaction temperature is 35 ℃, and pH is 6, and hydraulic detention time is 30min; In ozone Oxidation Treatment, add ozone catalytic agent SKO3-1 and ozone catalytic agent SKO3-2;
(4) film desalting treatment
The water outlet of described advanced treatment residue is entered to film processing system desalination; Described film processing system comprises ultrafiltration, nanofiltration and reverse osmosis.
A coal upgrading waste water treatment process, comprises the steps:
(1) oil removing sand setting is processed
Waste water, through naturally clarifying after 4h, adds oil removing sand setting medicament to mix in the liquid of upper strata, then enters mud-water separation region, and 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 oil removing sand setting is processed enters biochemical treatment system, utilizes the biochemical reaction of microorganism to remove the most pollutents in 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 to the reflux ratio of Aerobic Pond feed-water end is 1.5:1; Described Aerobic Pond effluent recycling to the reflux ratio of anoxic pond is 0.5:1;
(3) advanced treatment
Described biochemical treatment water outlet, after coagulation, multi-medium filtering, then is carried out disinfection, decoloured and remove after difficult degradation pollutent through ozone oxidation, a discharge part; Described ozone oxidation reaction temperature is 40 ℃, and pH is 7, and hydraulic detention time is 45min; In ozone Oxidation Treatment, add ozone catalytic agent SKO3-1;
(4) film desalting treatment
The water outlet of described advanced treatment residue is entered to film processing system desalination; Described film processing system comprises ultrafiltration, nanofiltration and reverse osmosis.
Specific embodiment 1
Adopt coal upgrading waste water treatment process of the present invention 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, through oil removing sand setting, processes, and suspended substance is reduced to below 100mg/L, and water quality clarification, enters subsequently follow-up anaerobic pond-Aerobic Pond and carry out biochemical treatment, COD
crbe reduced to 150mg/L left and right, 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 of the present invention to process coal upgrading waste water, as shown in Figure 2.Treatment capacity is 3000m
3/ d, former water COD
crbe 1500～3000mg/L, suspended substance is 1000～2000mg/L, through oil removing sand setting, processes and removes most suspended substances, COD
crbe reduced to 1300～2500mg/L, for reducing the impact of change of water quality to biochemical system, biochemical treatment adopts the processing mode of anaerobic pond-anoxic pond-Aerobic Pond, stable effluent quality, and pollutants removal rate is high, bio-chemical effluent COD
crbe reduced to 100～200mg/L, then through coagulating treatment and the ozone Oxidation Treatment that comprises catalyzer, water outlet COD
cr≤ 50mg/L, meets emission standard, directly discharges 2000m
3/ d; Remaining 1000m
3the waste water of/d is through ozone sterilization, and the film that has reduced subsequent film desalination system pollutes, and film desalination system produces water 800m
3/ d is as the reuse of coal process for upgrading water.
Applicant's statement, 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 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 the selection of the interpolation of the equivalence replacement of the selected raw material of the present invention and ancillary component, concrete mode etc., within all dropping on 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 characterictic described in above-mentioned embodiment, in reconcilable situation, can combine by any suitable mode, for fear of unnecessary repetition, the present invention is to the explanation no longer separately of various possible array modes.
In addition, between various embodiment of the present invention, also can carry out arbitrary combination, 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 (9)
1. a coal upgrading waste water treatment process, is characterized in that, coal upgrading waste water is reached to emission standard successively after the processing of oil removing sand setting, biochemical treatment and advanced treatment.
2. treatment process as claimed in claim 1, is characterized in that, will after advanced treatment, reach waste water reuse after film desalting treatment of emission standard.
3. treatment process as claimed in claim 1 or 2, is characterized in that, the chemical sludge producing in treating processes and biochemical sludge enter sludge treating system and process;
Preferably, described sludge treating system adopts belt filter press, plate-and-frame filter press or horizontal screw centrifuge to carry out concentration to mud.
4. the treatment process as described in one of claim 1-3, it is characterized in that, described oil removing sand setting is treated to: waste water, after naturally clarifying, adds oil removing sand setting medicament to mix in the liquid of upper strata, then enter mud-water separation region, supernatant liquor enters biochemical treatment system;
Preferably, the described residence time of clarification is naturally 2～5h, further preferred 3h;
Preferably, 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;
Preferably, described mud-water separation adopts radical sedimentation basin or inclined plate sedimentation pond.
5. the treatment process as described in one of claim 1-4, is characterized in that, described biochemical treatment is: the supernatant liquor after oil removing sand setting is processed enters biochemical treatment system, utilizes the biochemical reaction of microorganism to remove the pollutent in waste water;
Preferably, described biochemical treatment system comprises anaerobic pond and Aerobic Pond successively;
Preferably, the residence time of waste water in anaerobic pond is 6～15h, further preferred 10h;
Preferably, the residence time of waste water in Aerobic Pond is 30～70h, further preferred 45h.
6. treatment process as claimed in claim 5, is characterized in that, described biochemical treatment system also comprises the anoxic pond between anaerobic pond and Aerobic Pond;
Preferably, the residence time of waste water in anoxic pond is 3～12h, further preferred 8h;
Preferably, described Aerobic Pond mud to the reflux ratio of Aerobic Pond feed-water end is 1:1～3:1, further preferred 2:1;
Preferably, described Aerobic Pond effluent recycling to the reflux ratio of anoxic pond is 0.5:1～2:1, further preferred 1.5:1.
7. the treatment process as described in one of claim 1-6, is characterized in that, described advanced treatment is: described biochemical treatment water outlet, after coagulation, multi-medium filtering, then is carried out disinfection, decoloured and remove difficult degradation pollutent through ozone oxidation;
Preferably, described ozone oxidation reaction temperature is 20～50 ℃, further preferably 25 ℃;
Preferably, the pH of described ozone oxidation reaction is 5～8, further preferably 7;
Preferably, the hydraulic detention time of described ozone oxidation reaction is 10～60min, further preferred 30min;
Preferably, in described ozone Oxidation Treatment, add ozone catalytic agent SKO3-1 and/or ozone catalytic agent SKO3-2.
8. the treatment process as described in one of claim 2-7, is characterized in that, described film desalting treatment is: described advanced treatment water outlet is entered to film processing system and carry out desalination;
Preferably, described film processing system comprises the combination of two or three in ultrafiltration, nanofiltration or reverse osmosis.
9. the treatment process as described in one of claim 1-8, is characterized in that, described treatment process comprises the steps:
(1) oil removing sand setting is processed
Waste water, after naturally clarifying, adds oil removing sand setting medicament to mix in the liquid of upper strata, then enters mud-water separation region, and supernatant liquor enters biochemical treatment, and mud enters sludge treating system and processes;
(2) biochemical treatment
Supernatant liquor after oil removing sand setting is processed enters biochemical treatment system, utilizes the biochemical reaction of microorganism to remove the most pollutents in waste water; Described biochemical treatment system comprises anaerobic pond and Aerobic Pond successively;
(3) advanced treatment
Described biochemical treatment water outlet, after coagulation, multi-medium filtering, then is carried out disinfection, decoloured and remove difficult degradation pollutent through ozone oxidation;
(4) film desalting treatment
Described advanced treatment water outlet is entered to film processing system desalination; Described film processing system comprises the combination of two or three in ultrafiltration, nanofiltration or reverse osmosis.
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| CN107162350B (en) * | 2017-07-19 | 2020-08-04 | 北京赛科康仑环保科技有限公司 | Wastewater treatment method by utilizing powdered activated carbon in cascade manner |
| CN108529839A (en) * | 2018-04-17 | 2018-09-14 | 北京三川世纪能源科技股份公司 | A kind of drilling mud processing method and its system |
| CN111909750A (en) * | 2019-05-08 | 2020-11-10 | 国家能源投资集团有限责任公司 | Utilization method of waste liquid generated by coal chemical ash removal and coal ash removal method |
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