CHEN Gong.Process Design to Improve Quality and Efficiency of Sewer Sludge Treatment[J].China Water & Wastewater,2021,37(16 16):78-82.
Process Design to Improve Quality and Efficiency of Sewer Sludge Treatment
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
16 16
Page:
78-82
Column:
Date of publication:
2021-08-17
- Keywords:
- sewer sludge; sand-water separation; process improvement
- Abstract:
- Conventional sewer sludge treatment process has the problems of low sand washing efficiency under high load conditions, lower separation efficiency of ultra-fine sand with a particle size of less than 0.2 mm and high washing water consumption. An improved process of two-stage cyclone and sand-water separation was employed in a sewer sludge treatment project in Wuhan, in which the sewer sludge was separated into large substances with particle size over 10 cm, coarse substances with particle size between 6 mm-10 cm, inorganic sand with particle size between 0.075-6 mm and organic residue with particle size between 2-6 mm, among which the separation efficiency of 0.075-6 mm inorganic sand was 81.2%, the separation efficiency of 0.075-0.1 mm ultrafine sand was 73.4%, and the reuse water utilization rate reached 73.1%. The result can provide a reference for engineering design of regional large-scale sewer sludge treatment station, and help to improve the quality and efficiency of the drainage system.
Last Update:
2021-08-17