Sludge fermentation enhanced short-cut denitrification-anaerobic ammonia oxidation nitrogen removal and phosphorus recovery device and method

Abstract

The invention belongs to the technical field of low C / N ratio high nitrogen wastewater (C / N is less than 4) treatment, and particularly relates to a sludge fermentation enhanced short-cut denitrification-anaerobic ammonia oxidation nitrogen removal and phosphorus recovery device and method, which comprises an anaerobic fermentation reactor, a short-cut denitrification reactor, a nitration reactor and an anaerobic ammonia oxidation reactor, the method comprises the following steps: firstly fermenting excess sludge in a sludge fermentation system to produce acid, carrying out mud-water separation, then mixing the excess sludge with high-nitrogen wastewater in a mixing pipe, adding an agent II to form blue iron ore, carrying out mud-water separation in a sedimentation tank to recover phosphorus resources, firstly feeding supernate into an exogenous short-cut denitrification reactor, carrying out short-cut denitrification NO2-N accumulation by microorganisms by utilizing an external carbon source, and carrying out secondary denitrification by utilizing a secondary carbon source to obtain the high-nitrogen wastewater. Meanwhile, the sewage enters the nitration reactor through a filter for nitration reaction, nitration wastewater containing part of ammonia nitrogen flows back to the short-cut denitrification reactor for NO2-N accumulation, and the sewage enters the anaerobic ammonia oxidation reactor to realize autotrophic deep nitrogen removal.

Description

technical field [0001] The invention belongs to the technical field of low C / N ratio high nitrogen wastewater treatment, and in particular relates to a device and method for sludge fermentation enhanced short-range denitrification-anammox denitrification and phosphorus 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 existing sludge anaerobic fermentation treatment can not only realize the reuse of resources in the sludge, but also can chemically remove the sludge from the sludge. Inorganic resources are recycled, but the t...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a sludge fermentation enhanced short-range denitrification-anammox denitrification and phosphorus recovery device and method, to realize the combination of sludge anaerobic fermentation-external short-range denitrification and anammox technology Applied in the deep denitrification treatment of wastewater with high phosphorus content, and at the same time solve the problem of residual sludge treatment and disposal

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