CN103553266B - A kind of small-sized integrated processing method pickling factory's waste water - Google Patents
A kind of small-sized integrated processing method pickling factory's waste water Download PDFInfo
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- CN103553266B CN103553266B CN201310472143.8A CN201310472143A CN103553266B CN 103553266 B CN103553266 B CN 103553266B CN 201310472143 A CN201310472143 A CN 201310472143A CN 103553266 B CN103553266 B CN 103553266B
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Abstract
The present invention relates to a kind of integrated equipment and the operation method that process pickling waste water, it is characterized in that operational scheme comprises acidication, return-flow type anaerobic-aerobic alternation response device, wherein acidication acidication unit operating temperature 33 ~ 35 DEG C, redox potential-100mV ~-300mV, regulate pH for 6.5 ~ 7 with sodium bicarbonate, anaerobism section staggered floor arranges that 15 ~ 25cm grass stalk is as packing layer, aerobic section doses 2 ~ 3cm corncob cellulose as filler, the present invention has compact construction, volume is little, affect little by salinity and load impact, the features such as treatment effect is stable, good by the pickling waste water effluent quality after acidication-anaerobic-aerobic alternation response device process, treatment effect is stablized.
Description
Technical field
The present invention relates to technical field of waste water processing, it is exactly a kind of small-sized integrated processing method pickling factory's waste water, in particular to acidication-anaerobic-aerobic alternation response device and internal reflux method process pickling waste water technology, stable effluent quality after treatment, can directly discharge.
Background technology
Through statistics, every 300,000 tons of hot pickled mustard tubes need about 100 tons of water to eluriate, current China discharges pickling waste water every year and enters about 7,330,000 tons, and pickling waste water has high salinity concentration, saltiness reaches as high as 70000mg/L, COD concentration is about 10000mg/L, and general must to pickle factory rules and regulations mould less, comparatively disperses; Due to economic dispatch reason, small-sized pickling around factory is difficult to set up sewage work, if directly discharge can produce serious influence to environment; And general biological treatment and operation method are difficult to make pickling waste water be processed fully, the pickling waste water not obtaining fully process is discharged in the Nature and equally can causes very serious impact to environment.
At present, China still lays particular emphasis on common anaerobic-aerobic method to the improvement of pickling waste water and processes, the process on although all kinds of technology adopted can acquire a certain degree to pickling waste water, but general biological treatment floor space is larger, sludge output is many, do not meet the small-sized feature of pickling factory's waste water of process, and there are the problems such as treatment effect is unsatisfactory, business administration is inconvenient.
Therefore, for the high COD of pickling waste water, the feature of high ammonia nitrogen and pickle the practical situation of enterprise in efforts at environmental protection, developing this cover acidication-return-flow type anaerobic-aerobic is alternately main body, and connecting inner backflow operation scheme processes the technology of pickling waste water.
Summary of the invention
The object of this invention is to provide a kind of small-sized integrated processing method pickling factory's waste water, for pickle the pending waste water of hot pickled mustard tube COD content at about 10000mg/L, B/C about 0.35, ammonia nitrogen concentration is at about 200mg/L, and phosphorus content is at about 15mg/L.Waste water indices after treatment meets national secondary discharge standard, and floor space is little, and sludge output is few; The small-sized feature of pickling factory's waste water of the small-sized process of load.After first pickling waste water enters acidication unit process completely, the adjustment of pH is carried out in water outlet water inlet intermediate regulations pond, water outlet after regulating enters return-flow type anaerobic device, aerobic device continuously through lift pump, and the top of the water outlet after anaerobic-aerobic primary treatment through being back to anaerobic-aerobic device processes again; Temperature, hydraulic detention time, the parameter such as dissolved oxygen DO and inlet flow-patterm of controlling run in treating processes; Waste water water outlet after once degrading adopts internal reflux technique, a water outlet is back to top again and again processes, ensure that effluent quality.
The present invention is 2 component units according to processing capacity different demarcation, i.e. acidication processing unit, return-flow type anaerobic-aerobic alternate treatment unit.Pending pickling waste water by acidication processing unit, can improve the biodegradability of waste water successively; Return-flow type anaerobic-aerobic alternate treatment unit, can remove the pollutents such as the organism of waste water, ammonia nitrogen and phosphorus, below standard return of waste water processes to anaerobism section again by internal reflux mode again, ensure that treatment effect and the effluent quality for the treatment of system.
1. acidication processing unit, this unit comprises the equipment such as automatic stirrer, automatic temp controller, automatic water inlet valve and automatic outletting valve.Pickling waste water is entered by automatic water inlet valve from water tank, acidication step of reaction controls agitator by automatic control device, mud in device and waste water are fully reacted, controlled hydrolysis acidifying is hydrolyzed and two stages of acidifying, the larger molecular organics of waste water is degraded, improve the biodegradability of pickling waste water, for subsequent biological treatment provides good treatment condition.In addition, utilize hydrolysis acidification method pre-treatment high-salt wastewater, processing cost is low, effective, and acidication can reduce sludge yield, and equipment volume is little, meets small-sized feature of pickling water factory.
2 return-flow type anaerobic-aerobic alternate treatment unit, this unit mainly bears the removal of the pickling waste water organism after acidication process and nitrogen phosphorus, anaerobism section staggered floor arranges that 15 ~ 25cm grass stalk is as packing layer, aerobic section doses 2 ~ 3cm corncob cellulose as filler, the main organics removal of anaerobism section, also has the removal of certain effect to ammonia nitrogen; Aerobic section has good treatment effect to organism and nitrogen phosphorus.But the entering organic matter of water content of the pickling waste water considered is very high, large about 20000mg/L, organic content after acidication is also at about 15000mg/L, combination treatment through an anaerobic-aerobic is difficult to reach emission standard, so add and reflux technique in anaerobic-aerobic mixed cell, water outlet after primary treatment enters into anaerobism section through reflux technique at this and processes, and ensure that the water quality of pickling waste water final outflow water.
Internal reflux technique comprises the device such as water outlet header tank, reflux pump, automatically controlled valve composition, ensures that primary treatment water outlet can be back to the preliminary examination section of anaerobic-aerobic alternate cells by continuous print.
Advantage of the present invention is: waste water indices after treatment meets national secondary discharge standard, and floor space is little, and sludge output is few; The small-sized feature of pickling factory's waste water of the small-sized process of load.
Accompanying drawing explanation
Fig. 1 is present invention process setting drawing.
Fig. 2 is water outlet COD removal effect figure after acidication-return-flow type anaerobic-aerobic alternative method process.
Fig. 3 is ammonia nitrogen removal design sketch after acidication-return-flow type anaerobic-aerobic alternative method process.
Fig. 4 is phosphorus ligands design sketch after acidication-return-flow type anaerobic-aerobic alternative method process.
1-inlet chest in figure, 2-automatic stirrer, 3-reactor for hydrolysis and acidification, 4-Ph setting device, 5-inlet water lifting pumps, 6,7-anaerobic-aerobic alternation response device, 8-reflux pump, 9-overflow weir, 10-anaerobism section filler, 11-aerobic section filler, 12-water inlet pipe, 13-rising pipe.
Embodiment
Acidication unit, the water inlet of acidication unit is hydrolyzed by a high position and enters through self-acting valve, flooding time is 15min, rear reactor for hydrolysis and acidification of having intake brings into operation, automatic stirrer is started working, dissolved oxygen in hydrolysis acidification device is monitored constantly, ensure that its dissolved oxygen content is at about 0.3mg/L, to the high organic waste water of this high salt of pickling waste water be hydrolyzed acidizing pretreatment time, in two cycles of every day, its water conservancy residence time of each periodic Control is 10h, and namely the reaction times is 10h, precipitation 1.5h, draining 15min.
Intermediate regulations case, because acidication is at a large amount of hydrolytic bacteria, be dissolved organic matter by insoluble hydrolysis of organic matter under the effect of acidifying bacterium, the macromolecular substance of difficult for biological degradation is converted into the process of the small-molecule substance of readily biodegradable, in souring stage process, because the effect of bacterium can produce acetic acid, generally, water outlet pH value through reactor for hydrolysis and acidification declines, consider the good operation of follow-up anaerobic-aerobic alternate cells, the water outlet pH of acidication need add pH adjusting agent, the subsequent processing units therefore the water outlet of acidication water inlet intermediate regulations case was allowed for access after entering the adjustment of pH adjusting agent.
Return-flow type anaerobic-aerobic alternate cells, waste water after regulating enters into the anaerobism section of anaerobic-aerobic alternate cells through lift pump, anaerobism section is degraded to organism under the effect of methanogen, anaerobism section can remain on about 85% to organic clearance, to the clearance of ammonia nitrogen about 50%; Waste water after the process of anaerobism section directly enters into aerobic section through overflow weir, aerobic section to the organic clearance of pickling waste water about 83%, the clearance of ammonia nitrogen and phosphorus is respectively 87% and about 85%, because entering organic matter of water content is very high, effluent quality after primary treatment is difficult to reach emission standard, so effluent recycling need be carried out reprocessing to the first end-anaerobic stages of anaerobic-aerobic alternate cells by reflux technique, effluent quality can reach national secondary discharge standard, can discharge.
Claims (1)
1. process a method for pickling waste water, it is characterized in that: first pickling waste water enters acidication unit (3), operating temperature 33 ~ 35 DEG C, redox potential-100mV ~-300mV, operational process stirs; After reacting completely, water outlet enters the adjustment that pH is carried out in intermediate regulations pond (4), regulates pH for 6.5 ~ 7.0 with sodium bicarbonate; Water outlet after regulating enters return-flow type anaerobic device (6), aerobic device (7) continuously through lift pump (5), and anaerobic device (6) staggered floor arranges that 15 ~ 25cm grass stalk is as packing layer, and aerobic device (7) doses 2 ~ 3cm corncob cellulose as filler; Aerobic device (7) water part is back to lift pump (5) top through reflux pump (8) mixes with the water outlet of intermediate regulations pond and enters anaerobic device (6) again.
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| CN104150721B (en) * | 2014-08-29 | 2015-09-30 | 北京赛科康仑环保科技有限公司 | A kind of recycling processing method for foodstuff pickling waste water |
| CN104591463B (en) * | 2015-01-19 | 2016-06-01 | 重庆华绿环保科技发展有限责任公司 | Hot pickled mustard tube production wastewater treatment method |
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| US20050274669A1 (en) * | 2004-06-04 | 2005-12-15 | Wastech International, Inc. | Wastewater treatment system |
| KR100921688B1 (en) * | 2007-12-26 | 2009-10-15 | 한전원자력연료 주식회사 | Method for acidic wasten in iron industry |
| CN102344221A (en) * | 2010-07-27 | 2012-02-08 | 武汉森泰环保工程有限公司 | Process for treating high-salinity high-ammonia-nitrogen organic waste water |
| CN202465416U (en) * | 2011-12-27 | 2012-10-03 | 广东爱康太阳能科技有限公司 | Fluoride wastewater treatment system |
| CN202829787U (en) * | 2012-10-19 | 2013-03-27 | 机械工业第三设计研究院 | High-salinity high-concentration hot pickled mustard tuber organic wastewater treating system |
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