YAN Ying-ying,MENG Chun-lin,LIANG Yuan,et al.Continuous Deep Dewatering Coupled with Low Temperature Drying Process in Yingtan Sludge Treatment Plant[J].China Water & Wastewater,2020,36(16 16):105-110.
Continuous Deep Dewatering Coupled with Low Temperature Drying Process in Yingtan Sludge Treatment Plant
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
16 16
Page:
105-110
Column:
Date of publication:
2020-08-17
- Keywords:
- sludge treatment; deep dewatering; low temperature drying
- Abstract:
- The combined two-stage process of continuous deep dewatering coupled with low temperature drying was adopted in Yingtan sludge treatment plant with the capability of 65 t/d (the sludge water content was 80%). In the first stage of pre-dewatering before drying, the high-pressure belt filter press was used to reduce the water content to 65%-70% from 80% by mechanical dewatering. In the second stage of low temperature drying equipment, the water content of the wet sludge was reduced to 20% by convection hot air drying. The practice showed that adding a mechanical deep dewatering section at the front of the low temperature drying process could reduce the overall investment and operating costs. Furthermore, the two-stage process could enhance the flexibility and production guarantee redundancy of the system, the treated sludge were used as aggregate of landscaping fertilizer and would be sent to waste incineration plant in the long term. The successful operation of the project has realized the reduction and resource utilization of sludge in Yingtan, which is of demonstration significance to the selection of sludge treatment and disposal process in municipal wastewater treatment plant.
Last Update:
2020-08-17