SUN Jian-sheng,YE Ya-li,ZHENG Xing-can,et al.Research and Discussion on the Sludge Disposal Technology of Kunming WWTPs[J].China Water & Wastewater,2020,36(18 18):108-112.
Research and Discussion on the Sludge Disposal Technology of Kunming WWTPs
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
18 18
Page:
108-112
Column:
Date of publication:
2020-09-17
- Abstract:
- There are 22 wastewater treatment plants (WWTPs)in main districts and lake surrounding area of Kunming, which produce 1 061.64 t/d of sludge with water content of 80%. The present sludge treatment capacity is only 529 t/d, so sludge disposal has become an urgent problem to be solved in Kunming. The analysis results of local sludge characteristic show that the mixed sludge can meet the requirements of land use, sanitary landfill, building materials utilization as cement clinker production and incineration. Through systematically analyzing the feasibility of sludge disposal ways in Kunming, cement kiln incineration for resource reclamation is recommended as sludge disposal method, and sanitary landfill is taken as supplementary disposal. After comparing with three sludge disposal methods including anaerobic digestion, aerobic fermentation and dry incineration, and combining with the sludge disposal methods of this project, thermal drying was determined as sludge treatment methods. Five drying equipment such as disc drying are compared and disc drying is recommended. Thus disc thermal drying and cement kiln incineration are selected as the technical route of the project. The investment is 249 million yuan, and the unit processing cost is 361.8 yuan/t.
Last Update:
2020-09-17