Solids Handling Improvements Pays Back! Results from an Anaerobic Digester Upgrade Project

Authors: deSilva, Viraj; Milligan, John

Source: Proceedings of the Water Environment Federation, WEFTEC 2009: Session 41 through Session 50 , pp. 3151-3156(6)

Publisher: Water Environment Federation

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Abstract:

The City of Clearwater, Florida maintains and operates three wastewater treatment plants. The 5 mgd East Advanced Pollution Control Facility (APCF), the 13.5 mgd Northeast APCF, and the 10 mgd Marshall Street APCF.

Both Northeast APCF and Marshall APCF use anaerobic digesters for biosolids handling. The biosolids from East APCF is hauled and processed at Northeast APCF.

During the early 2000's the city experienced poor results from their digesters, due to deteriorated heating and mixing equipment. Consequently the City embarked on an initiative to invest in a rehabilitation program for all their digester facilities.

The purpose of this paper is to provide data on increased gas production and reduced hauling cost savings after the digesters were rehabilitated in late 2006. The data from the Northeast APCF is presented.

Keywords: Anaerobic Digestion; Biogas; Biosolids; Digester Cover; Digester Mixing; Sludge Disposal

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/193864700793955167

Publication date: January 1, 2009

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