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Evaluation of Sludge Screening and Screenings Dewatering Technologies

by Ali Davarinejad, James M. Montgomery, Consulting Engineers Inc, Pasadena, United States,
Jeffrey S. Berk, James M. Montgomery, Consulting Engineers Inc, Pasadena, United States,
Paul S. Skager, James M. Montgomery, Consulting Engineers Inc, Pasadena, United States,
Edick B. Ohanian, James M. Montgomery, Consulting Engineers Inc, Pasadena, United States,



Document Type: Proceeding Paper

Part of: Environmental Engineering

Abstract:

The concept of digested sludge screening has been utilized at the City of Los Angeles' Hyperion Treatment Plant to remove extraneous objects, hair, and fibrous material in order to enhance the sludge quality and to prevent the downstream processes from experiencing premature wear. An extensive study was undertaken to investigate the shortcomings of the existing Sludge Treatment Facility, develop a more efficient and reliable screening process, and to provide basis for the design of a new Sludge Screening Facility. A number of applicable screening technologies were pilot tested to obtain data on their hydraulic capacity, screenings dryness, screenings production, and fiber removal capability. In addition, a number of dewatering technologies were pilot tested to establish their effectiveness for sludge screenings dewatering.

Subject Headings: Sludge | Dewatering | Chemical treatment | Waste treatment | Sewage | Materials processing | Urban areas

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