Method for treating black odorous water by adopting MBBR combined process

Abstract

The invention discloses a method for treating black odorous water by adopting MBBR combined process and belongs to the field of sewage treatment. The method comprises the following steps: a bottom sediment suction pump outside a pool pumps bottom sediment of black odorous water into an anaerobic fermentation / anoxic tank, the black odorous water and returned sludge pumped from a settling pond by asludge reflux pump are mixed and are subjected to anaerobic fermentation and denitrification reaction, or NO3-N carried into the returned sludge is denitrified and removed by denitrifying bacteria through a carbon source generated through sludge fermentation and microorganism endogenous respiration; mud water subjected to anaerobic fermentation / anoxic pond reaction flows into the aerobic pond through an upper MBBR overflow hole, and meanwhile, water on the upper part outside the pool is lifted and black odorous water on bottom sediment in the black odorous water is pumped into MBBR and flows into the aerobic pond, and organic matters are removed and ammonia nitrogen is nitrified into NO3-N by a biological membrane and suspending active sludge on an efficient suspension carrier in the MBBRaerobic pond; the mud water after reaction in the MBBR aerobic pond automatically flows into the settling pond for mud and water separation through an intercepting suspension carrier effluent screen on the upper part of the water draining edge of the MBBR aerobic pond, and clean water returns into the water. According to the invention, the design is reasonable, the technique is advanced and the deep treatment for the black odorous water and the bottom sediment sludge of the black odorous water in a treatment device system can be realized.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to a method for treating black and odorous water bodies by an MBBR combined process. Background technique [0002] In April 2015, the "Water Pollution Prevention and Control Action Plan" (hereinafter referred to as "Water Ten Measures") was released, and one of the key tasks was the treatment of black and odorous water bodies in cities, which aroused the focus of the industry. Subsequently, the "Guidelines for the Remediation of Urban Black and Odorous Waters" issued in August 2015 clarified the investigation and identification of urban black and odorous waters, the formulation and implementation of remediation plans, the evaluation and assessment of remediation effects, the establishment of long-term mechanisms and policy guarantees and so on. [0003] The main reason for the formation of black odor in domestic cities and rural areas is that the pollutants entering the ...

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Problems solved by technology

[0003] The main reason for the formation of black odor in domestic cities and rural areas is that the pollutants entering the water body exceed the self-purification capacity of the water body, making the dissolved oxygen in the water body below 0.2mg / L, making the water body in an anaerobic state, and the organic pollutants in the water body are in an anaerobic state. Under the action of anaerobic microorganisms, some odorous substances such as hydrogen sulfide and volatile acids can be formed, causing serious pollution to water bodies

[0004] The pollution control of water body includes the purification of polluted or slightly polluted sewage in the water body, as well as the purification and elimination of the sediment deposited at the bottom of the water body. The commonly used water pollution control scheme is often to treat the two separately. The above micro The polluted water is treated biochemically, while the sediment is treated physically and chemically, which is incomplete and likely to cause secondary pollution

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