WANG Tao,KOU Yu-liang.Design of a Harmless Sludge Disposal Project of Sludge Composting in Weifang Sewage Treatment Plant[J].China Water & Wastewater,2021,37(24 24):65-68.
Design of a Harmless Sludge Disposal Project of Sludge Composting in Weifang Sewage Treatment Plant
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
24 24
Page:
65-68
Column:
Date of publication:
2021-12-17
- Keywords:
- sludge composting; aerobic fermentation; customized design
- Abstract:
- The sludge harmless disposal project of Weifang sewage treatment plant is a breakthrough in tradition and customized sludge composting project. The 600 t/d treatment capacity is divided into two treatment series: ① 400 t/d sludge with water content of 80% goes into the plate and frame pressure filtration dehydration to obtain the sludge with water content below 60%, and then goes into the aerobic fermentation process; ② 200 t/d sludge with water content of 80% goes directly into the aerobic fermentation process. This paper introduced the process flow and process design (material balance, parameters of each process, main equipments, etc.). The project has the characteristics of customized design, combination of deep mechanical dehydration with composting system, perfect resource processing system and smooth resource disposal outlet. The controllability of operation cost of series ① is good, the temperature rises slowly, and the products meet the requirements of soil improvement. The controllability of operation cost of series ② is slightly poor, the temperature rises quickly and the sludge decays fast, and the products meet the requirements of the raw materials for organic fertilizer.
Last Update:
2021-12-17