期刊
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
卷 75, 期 -, 页码 1-6出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ibiod.2012.07.015
关键词
Anaerobic co-digestion; FOG addition; FTIR; Sludge; Wastes; Adsorption
资金
- WWTP of the city of Leon
The digestion of residues with high lipid content was investigated. The experimental work focussed on the assessment of co-digestion of sewage sludge and fat, oil and grease (FOG) residues separated from the grease trap of the pre-treatment system of a wastewater treatment plant. A 0.2% volumetric ratio was set, based on the volumetric production of these streams in the plant. The digestion was carried out under semi-continuous operation at mesophilic temperatures. The operation of reactors at a hydraulic retention time (HRT) of 30 days resulted in no observable modifications of the specific methane production when compared to results obtained from sludge digestion and co-digestion systems. However, a decrease in HRT resulted in the detriment of the co-digesting reactor, which was attributed to an inhibitory process associated with the adsorption of FOG onto active sludge. (C) 2012 Elsevier Ltd. All rights reserved.
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