LIU Yan-hua,SU Xi-bo,GAO Ying-liang,et al.Renovation Technology and Practice of Horizontal Flow Sedimentation Tank in Urban Waterworks[J].China Water & Wastewater,2020,36(14):131-133.
Renovation Technology and Practice of Horizontal Flow Sedimentation Tank in Urban Waterworks
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
14
Page:
131-133
Column:
Date of publication:
2020-07-17
- Keywords:
- waterworks; horizontal flow sedimentation tank; trussed sludge scraper; grille type water distribution wall; diversion wall; solid content of discharge sludge
- Abstract:
- Since the horizontal flow sedimentation tanks in some domestic waterworks have been constructed for a long time, it is common that the equipment have reached service life, and the process has low water yield, high effluent turbidity, high water content of discharge sludge, large dosages, and decline of operation safety and operational efficiency caused by the aging of sludge discharge equipment. Based on the original horizontal flow sedimentation tank, Foshan Shakou Waterworks has carried out technical renovation and optimization on the siphon sludge scraper, inlet wall, decanting trough, and diversion wall. After that, the solid content of discharge sludge from the No.4 sedimentation tank was stable above 3.0%. Compared with the unmodified No.3 tank at the same effluent turbidity, the water yield was increased by 30%, the dosage was reduced by 3 mg/L, which greatly improved the treatment efficiency and reduced operating costs.
Last Update:
2020-07-17