Acid fermentation of primary sludge at 20v C

Master Thesis

1990

Permanent link to this Item
http://hdl.handle.net/11427/8295
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thesis_ebe_1990_lilley_id.pdf (4.18 MB)
Authors
Lilley, Ian David
Supervisors
Marais, Gerrit van Rooyen
Journal Title
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Volume Title
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Publisher

University of Cape Town

Department
Department of Civil Engineering
Faculty
Faculty of Engineering and the Built Environment
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Abstract
Full scale studies on biological excess phosphrous removal plants have demonstrated the biological excess phosphorous removal can be increased by acid fermenting the settled sludge in the primary settling tank, and adding either the fermented sludge, or the acids elutriated from the sludge, to the influent of the biological phosphorous removal plant. Considerable uncertainty still exists, however, as to the mass of short chain fatty acids that can be generated and the degree of improvement in phosphorous removal that can be expected. This study was undertaken to (1) evaluate short chain fatty acid production in laboratory scale batch, single and in-series completely mixed reactor systems, (2) development of a model for acid fermentation, and (3) theoretically estimate the effect of acid addition on biological excess phosphorous removal.
Description

Includes bibliography.

Keywords
Civil Engineering

Reference:

Lilley, I. 1990. Acid fermentation of primary sludge at 20v C. University of Cape Town.

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