LIANG Yuan,WANG Qi,WANG Qiao,et al.Application of Integrated Sludge-thickening and Deep-dewatering Machine in Waterworks Sludge Dewatering[J].China Water & Wastewater,2021,37(13 13):47-53.
Application of Integrated Sludge-thickening and Deep-dewatering Machine in Waterworks Sludge Dewatering
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
13 13
Page:
47-53
Column:
Date of publication:
2021-07-01
- Keywords:
- integrated sludge-thickening and deep-dewatering machine; waterworks sludge; sludge conditioning
- Abstract:
- An integrated sludge thickening and dewatering process and a complete set of pilot device (integrated sludge-thickening and deep-dewatering machine) were designed and developed to treat different kinds of waterworks sludge, and the design and operational parameters were optimized. For waterworks sludge with good dewaterability, the sludge water content could be reduced to lower than 70% after treated by the device fed with a small amount of sludge when only PAM was added. For waterworks sludge with bad dewaterability, effects of two sludge modifier addition modes (combined addition of PAM and sludge modifier and combined addition of PAM and lime milk) on dewatering efficiency were investigated, and technical and economic indices of different conditioning methods were analyzed. On premise of reaching the target water content, the operational capacities of the device after adding PAM alone, PAM and modifier and PAM and lime milk were 130 kgDS/h, 200 kgDS/h and 330 kgDS/h, and the treatment costs were 171.24 yuan/tDS, 262.44 yuan/tDS and 150.60 yuan/tDS, respectively. Therefore, the combined addition of PAM and lime milk for waterworks sludge conditioning can increase the productivity and reduce the treatment cost, so it is recommended to be applied in practical production.
Last Update:
2021-07-01