期刊
BIORESOURCE TECHNOLOGY
卷 102, 期 12, 页码 6637-6643出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2011.03.057
关键词
Foaming; Anaerobic digestion; Organic loading; Sludge; Filaments
资金
- Anglian Water
- Northumbrian Water
- Severn Trent Water
- Thames Water
- United Utilities and Yorkshire Water
The impact of increasing organic load on anaerobic digestion foaming was studied at both full and bench scale. Organic loadings of 1.25, 2.5 and 5 kg VS m(-3) were applied to bench-scale digesters. Foaming was monitored at a full scale digester operated in a comparable organic loading range over 15 months. The bench scale batch studies identified 2.5 kg VS m(-3) as a critical threshold for foam initiation while 5 kg VS m(-3) resulted in persistent foaming. Investigation of a full scale foaming event corroborated the laboratory observation that foaming may be initiated at a loading rate of 2.5 kg VS m(-3). Experimental findings on foam composition and differences in the quality characteristics between foaming and non-foaming sludges indicated that foam initiation derived from the combined effect of the liquid and gas phases inside a digester and that the solids/biomass ultimately stabilized foaming. (C) 2011 Elsevier Ltd. All rights reserved.
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