Sludge settleability in BNR processes

Hartley, K. J. and Lant, P. A. (2010) Sludge settleability in BNR processes. Water, 37 3: 72-83.

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Author Hartley, K. J.
Lant, P. A.
Title Sludge settleability in BNR processes
Journal name Water   Check publisher's open access policy
ISSN 0310-0367
Publication date 2010-05
Sub-type Article (original research)
Volume 37
Issue 3
Start page 72
End page 83
Total pages 12
Place of publication St Leonards, N.S.W., Australia
Publisher Australian Water Association
Collection year 2011
Language eng
Abstract This paper develops an empirical correlation between specific sludge volume index (SSVI) and primary anoxic mass fraction in biological nutrient removal (BNR) processes. Two separate studies are described involving eight full-scale BNR plants covering a wide range of process formats. These include nitrification denitrification (ND), enhanced biological phosphorus removal (EBPR) and NDEBPR processes in continuous flow or intermittently decanted formats, with or without primary treatment and prefermentation. None of the plants had chemical dosing to the liquid stream processes. In Study 1 routine operating data from six continuous flow, compartmentalised BNR plants were analysed. In Study 2 the operating regime of two intermittently decanted plants was systematically varied and process behaviour monitored. For all plants SSVI increased with primary anoxic mass fraction in a consistent manner. It was demonstrated in one of the intermittent plants that secondary anoxic mass fraction had no effect on SSVI.
Keyword Biological nutrient removal
Nitrification denitrification
Sludge volume index
Chemical dosing
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Official 2011 Collection
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Created: Tue, 01 Mar 2011, 16:58:58 EST by Professor Paul Lant on behalf of School of Chemical Engineering