Performance Analysis and Design Improvement of a Sludge Dewatering System  
Author Derrick C.P. Ng


Co-Author(s) Eric T.T. Wong


Abstract To comply with the government policy on the dewatering of sludge produced after sewage treatment process, efforts have been directed at improving the performance of sludge dewatering systems (SDS) in Hong Kong. This paper shows how selected essential components of a sludge dewatering design can be improved. In particular, the performance problems found including marginal discharge capacity of screw conveyor in sludge handling, long response time in screw rotation reversing, sewage leakage through mechanical seal at power shaft and drain blockage due to sludge compression were addressed. The operating principles of sludge dewatering are first introduced, followed by an implementation of the proposed design improvement. An equipment alternative to existing design was also evaluated.


Keywords centrifuge, screw conveyor, dewatering, filtration, expression
    Article #:  23-279
Proceedings of the 23rd ISSAT International Conference on Reliability and Quality in Design
August 3-5, 2017 - Chicago, Illinois, U.S.A.