CN1210215C - Process for deep treating sewage and reuse - Google Patents
Process for deep treating sewage and reuse Download PDFInfo
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- CN1210215C CN1210215C CN 02155205 CN02155205A CN1210215C CN 1210215 C CN1210215 C CN 1210215C CN 02155205 CN02155205 CN 02155205 CN 02155205 A CN02155205 A CN 02155205A CN 1210215 C CN1210215 C CN 1210215C
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Abstract
The present invention relates to a recycling technical for sewage deep processing, which has the technical scheme that raw water sequentially has the steps of coagulation air flotation, fibrous globule filtration, ozone contact oxidation, biological active carbon filtration, multi-medium filtration, precise filter filtration, sterilization, etc., and the sewage is deep purified and is recycled. The present invention has the advantages that the COD removal rate reaches more than 90%, the BOD5 removal rate reaches more than 95%, and the indexes of the effluent water COD, suspended substances, oil and NH3N are respectively controlled below 10 mg/L, 10 mg/L, 0.5 mg/L and 1.0 mg/L; the purified water can be directly used for industrialized production by replacing industrial fresh water, which provides great economic benefit for enterprises.
Description
Technical field
The invention belongs to sewage disposal technology, specifically a kind of advanced treatment of wastewater technology that realizes reusing sewage.
Background technology
China is the country of serious water shortage, and for solving the nervous problem of water resources, since the eighties in 20th century, a lot of cities and enterprise begin to consider that color advanced treatment of wastewater reuse technology solves water shortage problem.
At present, sewage recycling gains universal acceptance all over the world and uses.Relevant expert prediction will reach more than 60% to the reusing sewage rate of China in 2010.Oil and petroleum chemical industry requirement are reaching 30%-50% in nearly reusing sewage rate in two years.Want to realize reusing sewage, just must solve the advanced treatment process technology of sewage, reach available index after making sewage disposal.Sewage after the advanced treatment is mainly used in agricultural irrigation, urban afforestation, process water (comprise washing, dash the make up water of ash, dedusting, recirculated cooling water etc.), oil field re-injection etc., and according to reuse water purposes difference, desired reuse water index is also different.
The advanced treatment of wastewater technology can be divided into physics method, chemical method, physico-chemical processes and biochemical process etc. by its mechanism of action, usually several sewage disposal technologies of reusing sewage Technology Need carry out reasonable combination, be that various water treatment method combine and dispose of sewage, this is because single certain water treatment method generally is difficult to reach the requirement of quality of reused water.At present main adopt anaerobic and aerobic biological treatment, coagulating sedimentation, filtration, charcoal absorption, sterilization and membrane separation technique arranged.Adopt traditional coagulation, air supporting, filtration, biochemical technology to dispose of sewage, to biochemical preferably municipal effluent still can, but for the relatively poor industrial sewage of biochemical, its treatment effect does not often reach the reuse requirement, especially the ammonia nitrogen removal effect is relatively poor.General abroad membrane separation technique, though treatment effect is better, the treatment facility complexity, investment is big, running cost is high, also is difficult to apply.
Summary of the invention
The objective of the invention is to overcome the shortcoming of prior art, propose a kind of method that is applicable to the industrial sewage advanced treatment and reclamation that biochemical is relatively poor.
The concrete steps of advanced treatment of wastewater reuse technology of the present invention are followed successively by:
(1) (COD≤150mg/l) at first enters coagulation floatation to former water, and directly drop into coagulating agent and coagulant aids, to remove suspended substance and petroleum-type pollutent, described coagulating agent is selected from a kind of, two or more mixture in polymeric aluminum, the iron, its add-on is 20-50mg/L, described coagulant aids selects polyacrylamide (PAM), and its add-on is 0.5-2.0mg/L;
(2) sewage after step (1) air supporting is handled pumps into fiber ball filter and filters, further to remove suspended substance and petroleum-type pollutent, its operational condition: filtering velocity 20-30m/h, working pressure 0.4-0.6MPa, medium temperature 20-30 ℃;
(3) step (2) strainer water outlet is through O3 contacted oxidation, and its operational condition: the ozone dosage is that 5-15mg/L, reaction were arrheaed time 15-30 minute;
(4) sewage enters biologic active carbon filtration after step (3) ozone Oxidation Treatment, removing organic pollution materials, and its operational condition: filtering velocity 5-10m/h, working pressure 0.4-0.6Mpa, medium temperature 20-30 ℃;
(5) water outlet of step (4) biologic active carbon filtration enters more medium filter and accurate filter successively, to remove suspended substance, colloidalmaterial and the portion C OD in the sewage, its operational condition: working pressure 0.4-0.6Mpa, temperature 20-30 ℃, described filter element of precision filter aperture 1.0-10 μ m;
(6) after sterilization, enter the reuse retention basin through step (5) accurate filter filtered sewage and carry out reuse.
The described coagulation air-float of step of the present invention (1) unit has adopted state-of-the-art in the world at present cavitation air flotation technology (Zou Maoqing, " process water and waste water ", in April, 2000, P34-35) than traditional pressure air-dissolving air-float and jet flow dissolved air flotation, has significant advantage at aspects such as floor space, investment and working costs, need not compressor, molten gas and refluxing unit, need not to discharge head and do not have a release blockage problem, the complete machine running maintenance is convenient.Coagulated agent adopts directly and throws in, and mixes and reaction process in the middle of need not.Utilize medicament flocculation principle, by dissolved air flotation and fiber ball filter (" plumbing design manual ", version in 2000, P973) security personnel filter, can remove suspended contaminant, oil in water emulsion, colloid and solubility COD component in the sewage, tentatively improve the biodegradability of waste water, played vital role improving device operation stability and shock resistance.
Pollutants removal rate: COD (chemical oxygen demand (COD)) can reach more than 50%; SS (suspended substance) clearance reaches more than 60%, and effluent index is controlled at below the 50mg/L; OIL (petroleum-type) can reach more than 50%, and effluent index can be controlled in below the 5.0mg/L.
The described fiber ball filter of step of the present invention (2) has that retaining power is strong, backwash easily, operation control is easy and have good characteristics such as oil removing performance, obtained using widely.In this technical process, the air supporting water outlet is further removed SS, OIL index after fiber ball filter is handled.
The described ozone oxidation of step of the present invention (3) unit (thunder is carefree etc., " water treatment high-level oxidation technology ", June calendar year 2001, P3-16) ozone has extremely strong oxidative decomposition capacity, under economic injected volume controlling index condition, can effectively carry out water quality decolouring, oxygenolysis organism etc., can obviously improve the biodegradability of waste water, with the favourable condition (, the long-chain macromolecule organic being decomposed into the small organic molecule of readily biodegradable etc.) of creating follow-up biochemical treatment as the aromatics in the waste water is carried out the key point effect.Experimental result shows, utilize the combination of ozone, biological activated carbon, can significantly improve the organic oxygenolysis efficient (chemical effect) of part difficult degradation, for the stable and high effective operation of biological activated carbon has been created good condition, the shock-resistance to stabilizing water quality, raising biological activated carbon has played crucial effects simultaneously.
The described biological activated carbon of step of the present invention (4) unit (Nie Meisheng, " water and wastewater industry Engineering Design Manual ", in September, 1999, P644-653) be to utilize gac as microbe carrier, utilize its excellent absorption property, make organic substance in the slight pollution waste water carry out enrichment and concentrate reaching the matrix condition of microbial metabolism, by the microorganism system of domestication formation naturally, realize the purification of water quality process that absorption-microbiological degradation is regenerated-adsorbed, thereby realize the deep purifying of waste water.
The described more medium filter of step of the present invention (5) is to fill the Depth Filtration that constitutes by different-grain diameter, filler of different nature to hold back system, and the part filler has the bio-carrier characteristic, continuity along with working time, can form the fairly obvious biological treatment ability of effect naturally, with further removal residual organic matter, have great importance to improving effluent quality and strengthening the hole impact.The structure of more medium filter: strainer from bottom to top loads quartz sand, haydite, hard coal, gac successively, and its volume ratio is 1: 1: 1: 1, and total the filling highly is 800-1200mm, their particle diameter is 0.5-2.0mm.Strainer top water inlet, by the bottom through the water outlet discharge filter.The strainer operation was carried out backwash after 30 days, adopted air water backwash respectively, and backwash water and pressurized air are entered by bottom side spool mouth, and discharge at the top, and water backwash intensity is 1.0m
3/ m
2Min, gas backwash intensity is 3.0m
3/ m
2Min, the backwash time is 10-20min.
The filtering accuracy of accurate filter of the present invention can be held back bacterium and atomic little colloidal solid effectively, and effluent index is further guaranteed.Its structure see " water and wastewater industry Engineering Design Manual " (Nie Meisheng compiles, in September, 1999, P644-653).
Sterilization of the present invention is that just (blue literature and art, Shao Gang, " practical environmental engineering handbook in February calendar year 2001, P453-459) is disinfected routinely.
Method of the present invention and effect:
This technical process is treated to the technology core with ozonize and biological activated carbon, simultaneously supporting advanced person's pre-treatment and aftertreatment measure.Facts have proved, the every index of water quality can reach or approaching industrial fresh water level after this system handles, compare with traditional technology, not only can satisfy green area irrigation, flush the toilet, elementary reuse requirement such as carwash, and can substitute industrial fresh water direct reuse, thereby be the bigger economic benefit of enterprise's creation in suitability for industrialized production.The result shows: COD clearance of the present invention can reach more than 90%, and the BOD5 clearance reaches more than 95%, water outlet COD, suspended substance, oil, NH
3-N index is controlled at 10mg/L, 10mg/L, 1.0mg/L respectively, below the 1.0mg/L.
Embodiment
Further specify characteristics of the present invention below by specific examples.
Embodiment
Present embodiment is that certain petro-chemical corporation's oil refining sewerage is carried out advanced treatment and reclamation.
Present embodiment is to handle the back water outlet and (realized qualified discharge in " old three covers " oil refining sewerage field, operative norm GB8978-1996 secondary) on the basis, adopt method of the present invention to carry out advanced treatment again, reach reuse water quality index request, alternative industrial fresh water is back to production equipment.
Detailed process:
Through " the old three cover " sewage → coagulation air-floats after the processing (adding coagulating agent and coagulant aids simultaneously) → fibre-ball filtration → ozone oxidation → biologic active carbon filtration → multi-medium filtering → secondary filter → sterilization → reuse.System operation pressure 0.2-0.6MPa, water temperature 20-30 ℃, device processing power 500m
3/ h.Result sees Table 1.
Table 1
| Project | Average influent quality | Handle the average effluent quality in back | The total clearance of pollutent, % |
| COD，mg/L | 120-150 | 10-20 | 87.5 |
| Suspended substance, mg/L | 100 | Less than 15 | 85 |
| Oil, mg/L | 10 | Less than 0.5 | 95 |
| NH 3-N，mg/L | 5 | Less than 1.0 | 90 |
| Turbidity | 10 | Less than 1.0 | 90 |
| PH | 6-9 | 6-9 |
Claims (2)
1. advanced treatment of wastewater reuse technology is characterized in that concrete steps are followed successively by:
(1) the former water of COD≤150mg/l at first enters coagulation floatation, and directly drops into coagulant polymeric ferro-aluminum 20-50mg/l and coagulant aids polyacrylamide 0.5-2.0mg/l, to remove suspended substance and petroleum-type pollutent, the 20-30 minute air flotation pool residence time;
(2) sewage after step (1) air supporting is handled pumps into fiber ball filter and filters, further removing suspended substance and petroleum-type pollutent, and its operational condition: filtering velocity 20-30m/h, working pressure 0.4-0.6Mpa, medium temperature 20-30 ℃;
(3) step (2) strainer water outlet enters the O3 contacted oxidation tower, its operational condition: the ozone dosage is that 5-10mg/L, reaction were arrheaed time 15-30 minute;
(4) sewage enters the biologic active carbon filtration device after step (3) ozone Oxidation Treatment, removing organic pollution materials, and its operational condition: filtering velocity 5-10m/h, working pressure 0.4-0.6Mpa, medium temperature 20-30 ℃;
(5) water outlet of step (4) biologic active carbon filtration enters more medium filter and accurate filter successively, to remove suspended substance, colloidalmaterial and the portion C OD in the sewage, its operational condition: working pressure 0.4-0.6MPa, temperature 20-30 ℃, described filter element of precision filter aperture 1.0-10 μ m;
(6) after sterilization, enter the reuse retention basin through step (5) accurate filter filtered sewage and carry out reuse.
2. according to the described advanced treatment of wastewater reuse technology of claim 1, it is characterized in that the described more medium filter of step (5) is from bottom to top to load quartz sand, haydite, hard coal, active carbon filler in strainer successively, their granularity is 0.5-2.0mm, their volume ratio is 1: 1: 1: 1, and filler total fill able height is 800-1200mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02155205 CN1210215C (en) | 2002-12-06 | 2002-12-06 | Process for deep treating sewage and reuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02155205 CN1210215C (en) | 2002-12-06 | 2002-12-06 | Process for deep treating sewage and reuse |
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| Publication Number | Publication Date |
|---|---|
| CN1435386A CN1435386A (en) | 2003-08-13 |
| CN1210215C true CN1210215C (en) | 2005-07-13 |
Family
ID=27628788
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02155205 Expired - Fee Related CN1210215C (en) | 2002-12-06 | 2002-12-06 | Process for deep treating sewage and reuse |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101229936B (en) * | 2005-10-27 | 2010-08-11 | 韩春来 | Method and equipment for reclaiming refining and chemical wastewater |
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| CN100341802C (en) * | 2005-01-21 | 2007-10-10 | 中国科学院生态环境研究中心 | Method for deep treatment of bromine ion-containing drinking water |
| CN101396626B (en) * | 2007-09-26 | 2011-03-23 | 中芯国际集成电路制造(上海)有限公司 | Waste water processing method |
| CN102249445A (en) * | 2011-04-26 | 2011-11-23 | 中国矿业大学(北京) | Coal bed gas produced water disposal system |
| CN103046641B (en) * | 2011-10-14 | 2016-06-29 | 上海市政工程设计研究总院（集团）有限公司 | A kind of lift pump room and rear ozone contact tank combination structures |
| CN103408174A (en) * | 2013-08-14 | 2013-11-27 | 苏州大学 | Water-saving irrigation system |
| CN104118949A (en) * | 2014-07-02 | 2014-10-29 | 江苏中金环保科技有限公司 | A cold-rolling wastewater treating process |
| CN105174544A (en) * | 2015-09-22 | 2015-12-23 | 浙江巨能环境工程设备有限公司 | Advanced treatment and reclaimed-water recycling technology for printing and dyeing waste water |
| CN105236614A (en) * | 2015-10-12 | 2016-01-13 | 桂林市春晓环保科技有限公司 | Fast-purification waste water treatment device |
| CN107759007A (en) * | 2016-08-22 | 2018-03-06 | 上海爻铨环保机械工程有限公司 | The processing system and handling process of a kind of Cutting Liquid Wastewater |
| CN109650670A (en) * | 2019-01-25 | 2019-04-19 | 广州故乡源水处理有限公司 | The purification method of septic tank purification system |
| CN114291963A (en) * | 2021-12-03 | 2022-04-08 | 中国市政工程华北设计研究总院有限公司 | Method for removing emerging trace pollutants of sewage treatment plant and reducing ecological risk of effluent |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101229936B (en) * | 2005-10-27 | 2010-08-11 | 韩春来 | Method and equipment for reclaiming refining and chemical wastewater |
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