CN1718550A

CN1718550A - Biochemical treatment method of high concentration organic waste water

Info

Publication number: CN1718550A
Application number: CN 200510068184
Authority: CN
Inventors: 吴学云; 付美春
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-04-29
Filing date: 2005-04-29
Publication date: 2006-01-11

Abstract

A biochemical process for treating high-concentration organic sewage includes such steps as culturing yeast in sewage, adding active nutrients of microbe, quickly reproducing oxyphilic bacteria to decompose oil, N, P and C (saccharide) and obtain a lot of solid feed yeast, and treating the supernatant through desulfurizing by sulfate reduction, air floating, anaerobic UASB and aerobic CASS.

Description

Novel high density organic waste water biochemical processing method

The present invention relates to a kind of biochemical processing method of novel high density organic waste water.

The waste water element of being discharged by the zymotechnique production process is big with intractability, cost is high and make industry forbidding.Effort through the more than ten years, continuous development along with wastewater processing technology, though technology for treating industrial waste water improves, great majority have wastewater treatment results such as the enterprise of fermenting process such as grain distillery, Gourmet Powder Factory, Citric Acid Plant, brew-house, zymin factory still not very good.

The factory effluent of fermentation industry is a high concentrated organic wastewater, has characteristics such as acid strong, high COD, high BOD, high sulfate radical, high thalline content, and improvement work is difficulty.Contain a large amount of sugar, protein, SS and ammonia nitrogen in the waste water, these materials are not hazardous and noxious substances, can in growth and breeding, be utilized by some microorganisms, precious resources has not only been wasted in its any discharging, and cause serious environmental to pollute, but take existing sewage disposal technology can't reach emission request.

Existing sewage water treatment method mostly is to add various microorganism (bacterial classification) in sewage, this method is subjected to water quality and ambient temperature effect very big, when water quality and variation of ambient temperature, survival ability of the microorganism of being added and fecundity and the processing power of sewage will be descended greatly, thus influence is to the processing of sewage.

The present invention has changed processing mode in the past, be in sewage, to add barms and microorganism active nutrition agent simultaneously, both made the happiness oxygen bacterium breeding rapidly under the environment of nature in the sewage, reach the grease that decomposes in the sewage and nitrogen, phosphorus, charcoal organism such as (sugars), suppress breeding and the growth of anaerobism bacterium simultaneously, the effect that reaches deodorizing and cut grease increases the vigor of bacterium simultaneously, make bacterium be subjected to the influence of water quality and envrionment temperature very little, thereby increased processing power sewage.Barms is to utilize trade effluent to cultivate single cell protein (SCP) to obtain.Present technique is bacterial classification and the nutrition agent that adds in sewage in addition, can not cause secondary pollution to environment.The microorganism active nutrition agent is the multiple amino acids synthetics of quenching in the natural phant and getting, and is also referred to as vigor element, bio-active agent etc.

Concrete technology contents of the present invention is at first to utilize yeast to cultivate in factory effluent, in sewage, add the microorganism active nutrition agent simultaneously, obtain a large amount of solid feed yeast, supernatant liquor adopts " sulfate reduction desulfurization+air supporting+anaerobic UASB+aerobic CASS " method to handle again.This technology can reduce the every contamination index in the waste water, optimizes water quality, alleviates intractability, makes waste water energy qualified discharge.Waste water behind the qualified discharge can be used as boiler feed water or recirculated water utilization, thereby has saved water resources; The biogas that anaerobic treatment produces fully utilizes after collecting, and has saved the energy.

Its technical process is shown in Figure of description:

Wherein the processing condition of yeast culture are as follows: need not sterilize, can directly cultivate; Adopt the yeast of anti-vitriol, inoculum size 5～10%; Culture temperature: 28～32 ℃; PH4～5; During training in 24hr; Can handle continuously.

The processing condition that supernatant liquor is handled after the yeast culture are as follows:

1, add granule sludge in the sulfate reduction pond, temperature is cultivated in the employing, can remove most sulfate radical after domestication, with SO ₄ ^2-Be reduced into S ^2-

2, add aerobic sludge in the desulfurization pond, behind aeration with S ^2-Be oxidized to simple substance S, get rid of, thereby eliminate SO by air-flotation system ₄ ^2-Follow-up anaerobism is produced the influence of methane process.

3, add granule sludge in the UASB pond, temperature is cultivated in the employing, and its normal operation can be removed the COD more than 70%.

4, add aerobic sludge in the CASS pond, behind aeration, remove the COD more than 90%, simultaneously denitrogenation dephosphorizing.

The specific embodiment of the invention is raw wastewater to be squeezed in the equalizing tank 1, after water quality is even, add a certain amount of yeast to it, regulate the model and the consumption of bio-active agent, cultivate postprecipitation through 24hr, throw out obtains fodder yeast after dehydration, drying, pulverizing.Supernatant liquor drains in the equalizing tank 2, and fully mixing post-heating to 35 ℃ is squeezed into the sulfate reduction pond.In the sulfate reduction pond with the SO in the waste water ₄ ^2-Be reduced into S ^2-, and then squeeze into the biological desulphurization pond, behind aeration with S ^2-Be oxidized to simple substance S.Then it is squeezed into air-flotation system, remove simple substance S and a part of SS, supernatant liquor enters the intermediate regulations pond, squeezes into after being heated to 35 ℃ in the UASB reactor, and after treatment, the supernatant liquor overflow enters the CASS pond, the methane recovery utilization of generation.Stop after the period of aeration in the CASS pond, supernatant liquor is discharged by straining hydrophone through post precipitation, supernatant liquor reaches national secondary discharge standard through check, the mud of generation as fertilizer sources after thickening.

Claims

1, plants the biochemical processing method of novel high density organic waste water.In sewage, add the microorganism active nutrition agent when it is characterized in that utilizing yeast in factory effluent, to cultivate, reach the grease that decomposes in the sewage and nitrogen, phosphorus, charcoal organism such as (sugars), obtain a large amount of solid feed yeast simultaneously.Raw wastewater water quality optimizing after treatment alleviates the subsequent disposal difficulty.Supernatant liquor adopts " sulfate reduction desulfurization+air supporting+anaerobic UASB+aerobic CASS " method to handle again, makes waste water energy qualified discharge.

2, according to claims 1 cultivation of described yeast in factory effluent, its processing condition feature is: need not sterilize, directly cultivate; Adopt the yeast of anti-vitriol, inoculum size 5～10%; Culture temperature: 28～32 ℃; PH4～5; During training in 24hr; Can handle continuously.

3, according to claims 1 described yeast, it is characterized in that single cell protein (SCP).

4, according to claims 1 described microorganism active nutrition agent, the multiple amino acids synthetics that it is characterized in that quenching in the natural phant and get; Be also referred to as the vigor element, bio-active agent etc.