ZENGZheng-ren,SUNZheng,BAIHua-qing,et al.Technical Transformation Practice of Flocculation Sedimentation Tank in an Aging Waterworks[J].China Water & Wastewater,2024,40(4):89-92.
Technical Transformation Practice of Flocculation Sedimentation Tank in an Aging Waterworks
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第40卷
Number:
第4期
Page:
89-92
Column:
Date of publication:
2024-02-17
- Keywords:
- waterworks; composite sedimentation tank; flocculation sedimentation tank; grid flocculation; trussed sludge scraper; alum floc
- Abstract:
- The first phase of a waterworks with design capacity of 9×104 m3/d, using horizontal sedimentation tank technology, was built in 1995, and transformed into horizontal inclined tube composite sedimentation tank in 2010. Due to the poor flocculation effect, incomplete sludge discharge at the bottom of the inclined tube sedimentation zone, and alum runout, the actual water production yield is only 7×104 m3/d, so that it is urgent to optimize and transform to improve the water yield. By extending the flocculation time, changing mechanical and grid flocculation to grid flocculation and optimizing the layout, trussed sludge scraper instead of perforated pipe for sludge discharge, and increasing the height of the water distribution area, etc., the water yield was increased to 10.5×104 m3/d.
Last Update:
2024-02-17