Sludge carbon source two-stage alkaline hydrolysis acidizing recovery method

A technology of hydrolysis acidification and sludge carbon, which is applied in the field of sludge anaerobic biological treatment, can solve the problems of sludge treatment difficulties, lack of carbon sources, etc., and achieve the effect of accelerating the hydrolysis rate and increasing the yield
CN101708932BInactive Publication Date: 2011-06-22CHONGQING KANGDA ENVIRONMENTAL PROTECTION IND GRP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHONGQING KANGDA ENVIRONMENTAL PROTECTION IND GRP
Publication Date
2011-06-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a sludge carbon source two-stage alkaline hydrolysis acidizing recovery method, aiming at the problems that the carbon source in a sewage treatment plant is deficient and the sludge treatment is difficult and belonging the field of sludge and sewage treatment technology; the method adopts a strong-alkaline pretreatment method to lead the sludge treatment to be controlled in a hydrolysis acidification stage effectively, SOC and VFAs productivity are improved remarkably and the hydrolysis acidification time can be shortened to be 8.5 days. The method can adopt domestic sewage to elutriate SCOD generated in the sludge hydrolysis acidification, and the flexible selection whether the magnesium ammonium phosphate chemical precipitation method is carried out to sludge hydrolysis acidification liquid to remove nitrogen and phosphorus is carried out. The reduction rate of the remained activated sludge is more than 30 percent after the two-stage alkaline hydrolysis acidification is carried out, and recycling utilization of organic carbon source in the remained activated sludge is realized.
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Description

technical field

[0001] The invention relates to a sludge anaerobic biological treatment method, which is suitable for the reduction treatment of a large amount of excess activated sludge produced in the traditional biological treatment process of urban sewage and the extraction and recycling of organic carbon sources in the sludge. The invention belongs to the technical field of sludge sewage treatment. Background technique

[0002] The problem of eutrophication of water bodies is becoming more and more prominent, and the discharge standards of nitrogen and phosphorus are becoming stricter. my country promulgated in 2002 the "Urban Sewage Treatment Plant Pollutant Discharge Standards" to increase the emission concentration limits of total nitrogen and total phosphorus. In the process of sewage biological treatment, denitrification and denitrification need to consume a large amount of dissolved organic carbon (SOC), and enhanced biological phosphorus removal requires a large...

Claims

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