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J Environ Sci (China)

Title:		"Emission characteristics of dioxins, furans and polycyclic aromatic hydrocarbons during fluidized-bed combustion of sewage sludge"
Author(s):		Deng W; Yan J; Li X; Wang F; Chi Y; Lu S;
Address:		"State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou 310027, China. dengwy@dhu.edu.cn"
Journal Title:		J Environ Sci (China)
Year:		2009
Volume:		21
Issue:		12
Page Number:		1747 - 1752
DOI:		10.1016/s1001-0742(08)62483-3
ISSN/ISBN:		1001-0742 (Print) 1001-0742 (Linking)
Abstract:		"Pre-dried sewage sludge with high sulfur content was combusted in an electrically heated lab-scale fluidized-bed incinerator. The emission characteristics of polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs) and polycyclic aromatic hydrocarbons (PAHs) were studied. Coal and calcium oxide (CaO) were added during the sewage sludge combustion tests to optimize combustion conditions and control SO2 emission. The results indicated that the flue gases emitted during mono-combustion of sewage sludge were characterized by relatively high concentrations of SO2, NOx and organic pollutants, due to the high sulfur, nitrogen, and volatile matter content of sewage sludge. The total 16 USEPA priority PAHs and 2,3,7,8-substituted PCDD/Fs produced from sewage sludge combustion were found to be 106.14 microg/m3 and 8955.93 pg/m3 in the flue gas, respectively. In the case of co-combustion with coal (m(sludge)/m(coal) = 1:1), the 16 PAHs and 2,3,7,8-substituted PCDD/Fs concentrations were markedly lower than those found during mono-combustion of sewage sludge. During co-combustion, a suppressant effect of CaO on PCDD/Fs formation was observed"
Keywords:		Calcium Compounds/chemistry Coal Dioxins/*analysis Furans/*analysis *Incineration Oxides/chemistry Polycyclic Aromatic Hydrocarbons/*analysis Sewage/*chemistry;
Notes:		"MedlineDeng, Wenyi Yan, Jianhua Li, Xiaodong Wang, Fei Chi, Yong Lu, Shengyong eng Research Support, Non-U.S. Gov't Netherlands 2010/02/06 J Environ Sci (China). 2009; 21(12):1747-52. doi: 10.1016/s1001-0742(08)62483-3"