CN103553266A - Integrated processing method for wastewater of small salting factory - Google Patents

Integrated processing method for wastewater of small salting factory Download PDF

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Publication number
CN103553266A
CN103553266A CN201310472143.8A CN201310472143A CN103553266A CN 103553266 A CN103553266 A CN 103553266A CN 201310472143 A CN201310472143 A CN 201310472143A CN 103553266 A CN103553266 A CN 103553266A
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aerobic
waste water
anaerobic
water
small
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CN201310472143.8A
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CN103553266B (en
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于鹏飞
康忠会
黄殿男
傅金祥
马兴冠
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Shenyang Jianzhu University
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Shenyang Jianzhu University
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Abstract

The invention relates to an integrated device for processing wastewater of a small salting factory and an operation method. The integrated device is characterized in that an operation flow comprises a hydrolytic acidification-reflux type anaerobic/aerobic alternating reactor; an operation temperature of a hydrolytic acidification unit is 33-35 DEG C; a redox potential is between -100 mV and -300 mV; a pH value is adjusted to 6.5-7 by using sodium bicarbonate; the anaerobic section is provided with 15-25 cm thickness of rice straws are staggeredly arranged as a filler layer; and the aerobic section is filled with 2-3 cm thickness of corn cores as fillers. The integrated device is compact in structure and small in size, small in influences of salinity and load impact and stable in processing effect. The salting wastewater processed by the hydrolytic acidification-anaerobic/aerobic alternating reactor has good effluent quality and a processing effect is stable.

Description

A kind of small-sized integrated processing method of pickling factory's waste water
Technical field
The present invention relates to technical field of waste water processing, it is exactly a kind of small-sized integrated processing method of pickling factory's waste water, be particularly related to acidication-anaerobic-aerobic alternation response device and internal reflux method and process pickling waste water technology, stable effluent quality after treatment, can directly discharge.
Background technology
By statistics, every 300,000 tons of hot pickled mustard tubes need approximately 100 tons of water to eluriate, current China discharges every year pickling waste water and enters 7,330,000 tons of left and right, 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, the small-sized factory of pickling is difficult to set up sewage work around, if directly discharge can produce serious influence to environment; And general biological treatment and operation method are difficult to make pickling waste water to be processed fully, the pickling waste water that does not obtain fully processing 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 processing on although all kinds of technology that adopt can acquire a certain degree to pickling waste water, but general biological treatment floor space is larger, sludge output is many, do not meet and process small-sized feature of pickling factory's waste water, and there are the problems such as treatment effect is unsatisfactory, business administration is inconvenient.
Therefore, for the feature of the high COD of pickling waste water, 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 is processed 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 of pickling factory's waste water, for the COD content of pickling the pending waste water of hot pickled mustard tube, in 10000mg/L left and right, B/C is in 0.35 left and right, and ammonia nitrogen concentration is in 200mg/L left and right, and phosphorus content is in 15mg/L left and right.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 processing of loading.After first pickling waste water enters acidication unit process completely, the adjusting 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 water outlet after anaerobic-aerobic primary treatment is processed again through being back to the top of anaerobic-aerobic device; The temperature of controlling run, hydraulic detention time, dissolved oxygen DO and the parameters such as pH of intaking in treating processes; Waste water is effluent adopting internal reflux technique after once degrading, and a water outlet is back to top again and again processes, and has guaranteed 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, successively by acidication processing unit, can improve the biodegradability of waste water; Return-flow type anaerobic-aerobic alternate treatment unit, can remove the pollutents such as organism, ammonia nitrogen and phosphorus of waste water, and internal reflux mode is processed below standard return of waste water to anaerobism section again again, has guaranteed 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 enters by automatic water inlet valve from water tank, acidication step of reaction is controlled agitator by automatic control device, mud in device is fully reacted with waste water, controlled hydrolysis acidifying is hydrolyzed and two stages of acidifying, make the larger molecular organics degraded of waste water, 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, pickling waste water organism after acidication is processed and the removal of nitrogen phosphorus are mainly born in this unit, anaerobism section staggered floor arranges that 15 ~ 25cm grass stalk is as packing layer, aerobic section is dosed 2 ~ 3cm corncob cellulose as filler, anaerobism section is mainly removed organism, ammonia nitrogen is also had to the removal of certain effect; Aerobic section has good treatment effect to organism and nitrogen phosphorus.But the entering organic matter of water content of the pickling waste water of considering is very high, greatly about 20000mg/L, organic content after acidication is also in 15000mg/L left and right, 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 has guaranteed the water quality of pickling waste water final outflow water.
Internal reflux technique comprises the installation compositions such as water outlet header tank, reflux pump, automatically controlled valve, guarantees the preliminary examination section that is back to anaerobic-aerobic alternate cells that primary treatment water outlet can be continuous.
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 processing of loading.
Accompanying drawing explanation
Fig. 1 is process device figure of the present invention.
Fig. 2 is water outlet COD removal effect figure after acidication-return-flow type anaerobic-aerobic alternative method is processed.
Fig. 3 is ammonia nitrogen removal design sketch after acidication-return-flow type anaerobic-aerobic alternative method is processed.
Fig. 4 is phosphorus removal effect figure after acidication-return-flow type anaerobic-aerobic alternative method is processed.
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 entered through self-acting valve by high position hydrolysis, flooding time is 15min, the 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, guarantee that its dissolved oxygen content is in 0.3mg/L left and right, when the high organic waste water of this high salt of pickling waste water is hydrolyzed to acidifying pre-treatment, in two cycles of every day, its water conservancy residence time of each periodic Control is 10h, and the reaction times is 10h, precipitation 1.5h, draining 15min.
Intermediate regulations case, because acidication is at a large amount of hydrolytic bacterias, under the effect of acidifying bacterium, by insoluble hydrolysis of organic matter, be dissolved organic matter, 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, therefore the water outlet of acidication water inlet intermediate regulations case entered the subsequent disposal unit of being allowed for access after the adjusting 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 85% left and right to organic clearance, to the clearance of ammonia nitrogen in 50% left and right; Waste water after anaerobism section is processed directly enters into aerobic section through overflow weir, aerobic section to the organic clearance of pickling waste water in 83% left and right, the clearance of ammonia nitrogen and phosphorus is respectively 87% and 85% left and right, because entering organic matter of water content is very high, effluent quality after primary treatment is difficult to reach emission standard, so need an effluent recycling be processed to the first end-anaerobic stages of anaerobic-aerobic alternate cells again by reflux technique, effluent quality can reach national secondary discharge standard, can discharge.

Claims (3)

1. integrated equipment and an operation method of processing pickling waste water, it is characterized in that: after first pickling waste water enters acidication unit (3) and react completely, the adjusting of pH is carried out in water outlet water inlet intermediate regulations pond (4), water outlet after regulating enters return-flow type anaerobic device (6), aerobic device (7) continuously through lift pump (5), and the top that the water outlet after anaerobic-aerobic primary treatment is back to anaerobic-aerobic device through reflux (8) is processed again; The temperature of controlling run, hydraulic detention time, dissolved oxygen DO and the parameters such as pH of intaking in treating processes; Waste water is effluent adopting internal reflux technique after once degrading, and a water outlet is back to top again and again processes, and has guaranteed effluent quality.
2. a kind of integrated equipment and operation method of processing pickling waste water according to claim 1, is characterized in that: anaerobic device staggered floor arranges that 15 ~ 25cm grass stalk is as packing layer, and aerobic device is dosed 2 ~ 3cm corncob cellulose as filler.
3. a kind of integrated equipment and operation method of processing pickling waste water according to claim 1, is characterized in that: it is 6.5~7 that 33 ~ 35 ℃ of acidication unit (3) operating temperatures, redox potential-100mV ~-300mV, the sodium bicarbonate of take regulate pH.
CN201310472143.8A 2013-10-11 2013-10-11 A kind of small-sized integrated processing method pickling factory's waste water Expired - Fee Related CN103553266B (en)

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CN104150721A (en) * 2014-08-29 2014-11-19 北京赛科康仑环保科技有限公司 Resourceful treatment method for food processing wastewater
CN104591463A (en) * 2015-01-19 2015-05-06 重庆华绿环保科技发展有限责任公司 Method for treating preserved vegetable production wastewater

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104150721A (en) * 2014-08-29 2014-11-19 北京赛科康仑环保科技有限公司 Resourceful treatment method for food processing wastewater
CN104591463A (en) * 2015-01-19 2015-05-06 重庆华绿环保科技发展有限责任公司 Method for treating preserved vegetable production wastewater
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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