YANG Hua-xian.Reconstruction Practice of V-type Filter in a Large-scale Old Water Treatment Plant[J].China Water & Wastewater,2020,36(20 20):143-147.
Reconstruction Practice of V-type Filter in a Large-scale Old Water Treatment Plant
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
20 20
Page:
143-147
Column:
Date of publication:
2020-10-17
- Keywords:
- V-type filter; technical reconstruction; initial filter water; filtration velocity; backwashing
- Abstract:
- The V-type filter was reconstructed in a large-scale old water treatment plant, in view of the problems due to obsolete design such as filter head blockage, filter cap rupture, filter plate dislocation, tank wall scaling, backwash unevenness, filter material wear, sand loss, and high turbidity, etc. The technical reconstruction ideas and diagnosing analysis were provided according to the requirements of new water quality standards and filter design codes. The operation results showed that the turbidity of V-type filter effluent was stably below 0.3 NTU and met the Standards for Drinking Water Quality(GB 5749-2006). The backwashing cycle was extended from 24 h to 36 h and the backwashing water volume was saved by 56%. Hence, the annual backwashing water was saved by 23.5×104 m3. The operation practice indicated that the operation effect of the old V-type filter could be significantly improved by controlling the filtration rate, changing the filter material, leveling the filter plate, clearing the filter head, and adjusting the backwashing condition without adding the initial filter water discharge.
Last Update:
2020-10-17