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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

Inactive Publication Date: 2011-06-22
CHONGQING KANGDA ENVIRONMENTAL PROTECTION IND GRP
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Problems solved by technology

[0004] The purpose of the present invention is to provide a two-stage alkaline hydrolysis acidification treatment device for excess activated sludge and a sludge carbon source recovery method for the problems of lack of carbon sources in sewage treatment plants and difficulties in sludge treatment, so as to realize the recovery of organic carbon sources in sludge. recycling

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  • Sludge carbon source two-stage alkaline hydrolysis acidizing recovery method
  • Sludge carbon source two-stage alkaline hydrolysis acidizing recovery method
  • Sludge carbon source two-stage alkaline hydrolysis acidizing recovery method

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[0033] Implementation example: A / O reactor and oxidation ditch reactor with actual domestic sewage (pH=6.5~7.8, COD=260~350mg / L, TN=60~85mg / L) discharged from a family area of ​​a university as the experimental object A large amount of excess activated sludge is produced, which is mixed and concentrated as sludge for two-stage alkaline hydrolysis acidification treatment device. The effective volume of the entire reaction system is 31L, the MLSS after sludge concentration is 15-20g / L, and the TCOD is 17.6-25.2g / L. Add 2L of concentrated sludge every day to produce 48L of available sludge hydrolysis acidification solution. After the system is stabilized, the two-stage alkaline hydrolysis efficiency of sludge can reach 38.19%, and the acidification efficiency can reach 51.69%, such as figure 2 shown. The concentration of SOC in the effluent of sludge two-stage alkaline hydrolysis and acidification solution is 180-430mgC / L, and the concentration of VFA is 75-150mgC / L. image 3...

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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.

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...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F3/28C02F1/66
Inventor 彭永臻高永青王淑莹张晶宇
Owner CHONGQING KANGDA ENVIRONMENTAL PROTECTION IND GRP
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