Two grade alkaline hydrolysis and acidification device for processing residual activated sludge

A technology of hydrolytic acidification and residual activity, which is applied in the direction of biological sludge treatment, etc., can solve the problems of lack of carbon sources and difficulties in sludge treatment, and achieve the effect of accelerating the hydrolysis rate and increasing the yield

Active Publication Date: 2010-06-30
BEIJING DRAINAGE GRP CO LTD
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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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  • Two grade alkaline hydrolysis and acidification device for processing residual activated sludge
  • Two grade alkaline hydrolysis and acidification device for processing residual activated sludge
  • Two grade alkaline hydrolysis and acidification device for processing residual activated sludge

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Embodiment

[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 discloses a two grade alkaline hydrolysis and acidification device for processing residual activated sludge, which solves the difficult problems of leakage of carbon source and difficult sludge treatment in wastewater treatment plant, relating to the wastewater sludge processing technology field. The device comprises a strong alkali continuous stirred-tank reactor CSTR, an upflow type strengthened hydrolysis and acidification reactor UHAR, a sludge hydrolysis and acidification fluid chemical denitriding and dephosphorizing reactor CPR, and a master controller; wherein the master controller comprises a time relay, a pH temperature sensor, a pH sensor and a computer, and further comprises a medicine adding device. The device has simple operation and is easy to control. The decrement rate of residual activated sludge after two grade alkaline hydrolysis and acidification is carried out is more than 30%, and the device can achieve recycling use of organic carbon source in the residual activated sludge.

Description

technical field [0001] The invention relates to a sludge anaerobic biological treatment device, 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 has become increasingly prominent, and the discharge standards for nitrogen and phosphorus have become increasingly stringent. 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 requ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/04
Inventor 彭永臻高永青王淑莹张晶宇
Owner BEIJING DRAINAGE GRP CO LTD
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