Evaluation of Bacterial Pathogen and Indicator Densities After Dewatering of Anaerobical Digested Biosolids Phase II and III

Idioma: inglés

Editorial: IWA Publishing, GB, 2008

1843397846 / 9781843397847

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The sudden increase in indicator bacteria, including fecal coliforms (FCs) and E. coli, was evaluated at several full-scale facilities, in addition to the increase measured during cake storage. The results showed that the sudden increase was a statistically verifiable occurrence at some facilities, but not all, as was the additional increases measured during cake storage. The sudden increase and growth were much more prevalent in processes that utilized centrifuge dewatering compared to belt filter press dewatering. The sudden increase appears to be a result of the reactivation of indicator bacteria that become reversibly non-culturable (RNC) during digestion. Although other hypotheses, such as contamination and presence of inhibitors, cannot be ruled out in all cases. Only one plant that was sampled with high solids centrifugation did not show reactivation and/or regrowth and this plant was different from others in that it utilized thermophilic reactors in series. The results showed a good correlation between the digestion temperature and the reactivation potential and amount of reactivation measured after dewatering. As temperature of digestion increased, the amount of reactivation increased (for plants with reactivation). Similarly, this was generally true, on average for the extent of regrowth. The digestion SRT and VS reduction did not correlate well with reactivation or regrowth.

N° de ref. del artículo LU-9781843397847

Título
Evaluation of Bacterial Pathogen and Indicator Densities After Dewatering of Anaerobical Digested Biosolids Phase II and III
Autor
Matthew J. Higgins
Editorial
IWA Publishing, GB
Año de publicación
2008
Estado
New
Encuadernación
Paperback
Idioma
inglés
ISBN 10
1843397846
ISBN 13
9781843397847

Rarewaves.com USA

London, London, Reino Unido

Vendedor de 5 estrellas

Vendedor de AbeBooks desde 11 de junio de 2025

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