Sludge anaerobic fermentation enhanced low C/N sewage deep nitrogen and phosphorus removal and resource recovery device and method

Abstract

The invention belongs to the technical field of low C / N ratio sewage treatment, sludge treatment and recycling, and relates to a device and a method for enhancing low C / N ratio sewage deep nitrogen and phosphorus removal and resource recovery through sludge anaerobic fermentation. The device comprises an excess sludge storage tank, a chemical tank I, an anaerobic fermentation reactor, a chemical tank II, a sedimentation tank, a mixing tank, a recovery tank, an intermediate water tank and a nitrogen and phosphorus removal integrated reactor. The purified fermentation liquor enters a nitrogen and phosphorus removal integrated reactor according to a certain proportion to provide a carbon source for low C / N sewage for deep nitrogen and phosphorus removal treatment. According to the method, deep nitrogen and phosphorus removal of the low C / N sewage can be stably realized, organic resource recycling of residual sludge and recycling of inorganic resources, namely ammonia nitrogen and phosphorus are realized, an external carbon source and a secondary sedimentation tank are not needed, the operation control is simple, and high-efficiency and low-consumption low C / N sewage treatment is realized.

Description

technical field [0001] The invention belongs to the technical field of low C / N ratio sewage treatment, sludge treatment and resource utilization, and in particular relates to a device and method for enhancing deep denitrification and dephosphorization of low C / N sewage by sludge anaerobic fermentation and resource recovery. Background technique [0002] Recycling of excess sludge and high-nitrogen wastewater treatment are very important to protect the environment, especially industrial wastewater containing phosphorus, low C / N ratio, and high nitrogen is difficult for denitrification. Traditional sludge treatment methods not only cause secondary pollution to the environment, At the same time, the protein, polysaccharide, organic nitrogen and organic phosphorus in the remaining sludge cause waste of resources. The traditional treatment process of low C / N sewage needs to add a large amount of external carbon sources such as glucose and acetic acid to achieve the removal of nitr...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a device and method for sludge anaerobic fermentation to strengthen the deep denitrification and dephosphorization of low C / N sewage and resource recovery, so as to realize the application of sludge anaerobic fermentation and integrated denitrification and dephosphorization equipment to low C In the nitrogen and phosphorus removal of / N sewage, at the same time solve the problem of residual sludge treatment and disposal

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