期刊
BIORESOURCE TECHNOLOGY
卷 100, 期 4, 页码 1634-1642出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2008.09.025
关键词
Sewage sludge; Composting; Linear alkylbenzene sulfonates (LAS); Nonylphenol ethoxylates (NPEO); Di-ethyl-hexyl phthalate (DEHP)
资金
- BIOWASTE [QLKS-CT-2002-01138]
- Municipal Sewage Treatment Plant of Athens and Patras
The fate of hydrophobic xenobiotic pollutants such as linear alkylbenzene sulfonates (LAS), nonylphenol ethoxylates (NPEO) and di-ethyl-hexyl phthalate (DEHP) during sewage sludge composting was addressed in this work. The experiments were conducted in a fully automated in-vessel autothermal composting system which was fed with a mixture of primary and secondary sludge and manure. The mixture composition was determined to achieve satisfactory humidity, C/N ratio and free airspace (FAS). The effect of various parameters, such as the initial xenobiotic concentration, the presence of multiple xenobiotic compounds and the temperature of composting material sustained during the process on the xenobiotics biodegradation kinetics was investigated. It was generally established that significant xenobiotic reduction is achievable through composting under all conditions tested. According to the obtained results, the presence of LAS, NPEO and DEHP even at higher concentrations was not inhibitory to the bioprocess. However, the presence of multiple xenobiotic compounds such as NPEO, NP and DEHP in the sludge can influence LAS removal during LAS composting. (C) 2008 Elsevier Ltd. All rights reserved.
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