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Low sludge carbohydrate content: a prerequisite for enhanced biological phosphate removal

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Abstract:

The relationship between sludge carbohydrate (CH) content and phosphate (P) removal performance has been studied in two sequencing batch reactors (SBRs) exhibiting enhanced biological phosphorus removal (EBPR). Glucose and acetate were used as the main organic substrates for the two SBRs, respectively. The phosphorus removal performance was excellent when the sludge CH content ranged from 8 to 10% (CH/mixed liquor suspended solids), but it declined concomitantly as the sludge CH content increased beyond this range. The sludge CH content was found to be a reliable parameter representing its capacity for phosphorus removal. The change of the sludge CH content was mainly influenced by the characteristics of the substrates, as well as by the operation modes. The study, as a whole, suggests that the control of sludge CH content to low levels is a prerequisite for achieving enhanced phosphorus removal in EBPR process.

Keywords: ACTIVATED SLUDGE; PHOSPHATE REMOVAL; SLUDGE CARBOHYDRATE

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/106143097X126055

Publication date: November 1, 1997

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  • Water Environment Research® (WER®) publishes peer-reviewed research papers, research notes, state-of-the-art and critical reviews on original, fundamental and applied research in all scientific and technical areas related to water quality, pollution control, and management. An annual Literature Review provides a review of published books and articles on water quality topics from the previous year.

    Published as: Sewage Works Journal, 1928 - 1949; Sewage and Industrial Wastes, 1950 - 1959; Journal Water Pollution Control Federation, 1959 - Oct 1989; Research Journal Water Pollution Control Federation, Nov 1989 - 1991; Water Environment Research, 1992 - present.
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