CONDITIONING AND MECHANICAL FILTER PRESS DEWATERING OF MUNICIPAL SLUDGE WITH THE USE OF SEMI-COKE

DAI Cai-sheng; PENG Ying; HUANG Chen-yu; QIU Yan-lan

doi:10.13205/j.hjgc.202102021

Volume 39 Issue 2

Jul. 2021

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2021 > 39(2): 131-135

DAI Cai-sheng, PENG Ying, HUANG Chen-yu, QIU Yan-lan. CONDITIONING AND MECHANICAL FILTER PRESS DEWATERING OF MUNICIPAL SLUDGE WITH THE USE OF SEMI-COKE[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(2): 131-135. doi: 10.13205/j.hjgc.202102021

Citation:

DAI Cai-sheng, PENG Ying, HUANG Chen-yu, QIU Yan-lan. CONDITIONING AND MECHANICAL FILTER PRESS DEWATERING OF MUNICIPAL SLUDGE WITH THE USE OF SEMI-COKE[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(2): 131-135. doi: 10.13205/j.hjgc.202102021

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CONDITIONING AND MECHANICAL FILTER PRESS DEWATERING OF MUNICIPAL SLUDGE WITH THE USE OF SEMI-COKE

doi: 10.13205/j.hjgc.202102021

School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China

Received Date: 2020-07-10
Available Online: 2021-07-19

Abstract

Abstract

In this study, municipal sludge conditioning experiments and mechanical filter press dewatering of the conditioned sludge were performed to investigate the influence of the addition of semi-coke during the conditioning step, and the filtration pressure on the water content of the resulting sludge filter cake. The results indicated that the water content of sludge cake decreased with increasing amount of semi-coke added and filtration pressure. When the addition amount of semi-coke was 4 g/100 mL sludge (water content of 95%) with a filtration pressure of 1.6 MPa, the water content was reduced from 80% to 32.19%. The semi-industrial operation of sludge conditioning and dewatering based on semi-coke validated the conclusions above. In addition, it was found that the heat value of the sludge filter cake was improved from 7.82 MJ/kg to 15.29 MJ/kg through the addition of semi-coke, enabling the direct power generation and replacing the combustion of coal. The combination of semi-coke-aided conditioning and mechanical filter press dewatering of municipal sludge could achieve the efficient utilization of sludge as an energy source, which was significant to resource conservation and environmental protection.
- semi-coke,
- municipal sludge,
- conditioning,
- mechanical filter press dewatering

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References(18)

References

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