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Bioresour Technol

Title:		Effect of composting on the removal of semivolatile organic chemicals (SVOCs) from sewage sludge
Author(s):		Cai QY; Mo CH; Lu H; Zeng QY; Wu QT; Li YW;
Address:		"Key Laboratory of Soil Environment and Waste Reuse in Agriculture of Guangdong Higher Education Institutions, College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China"
Journal Title:		Bioresour Technol
Year:		2012
Volume:		20111120
Issue:
Page Number:		453 - 457
DOI:		10.1016/j.biortech.2011.11.039
ISSN/ISBN:		1873-2976 (Electronic) 0960-8524 (Linking)
Abstract:		"In order to investigate the occurrence and removal of semivolatile organic chemicals (SVOCs) in the compost of sewage sludge, three different composting treatments, including manual turned compost (MTC), intermittent aerated compost (IAC), and naturally aerated compost (NAC) were conducted. Thirty SVOCs in composts were Soxhlet-extracted and analyzed by GC/MS. After 56 days of composting, the total concentrations of 16 polycyclic aromatic hydrocarbons ( summation operatorPAHs) ranged from 0.55 to 8.20 mg kg(-1) dry weight, decreasing in order of IAC>MTC>NAC. The total concentrations of six phthalic acid esters ( summation operatorPAEs), five chlorobenzenes or three nitroaromatic compounds were less than 5.0 mg kg(-1). Compared with the initial concentrations in sewage sludge, a significant reduction of summation operatorPAHs, summation operatorPAEs and chlorobenzenes was observed. The removal rates of summation operatorPAHs and summation operatorPAEs ranged from 54.6% to 75.9% and from 58.3% to 90.6%, respectively. Compared with different composting processes, MTC showed the highest potential for removal of SVOCs"
Keywords:		Chlorobenzenes/isolation & purification Esters/isolation & purification Nitrogen Compounds/isolation & purification Organic Chemicals/*isolation & purification Polycyclic Aromatic Hydrocarbons/isolation & purification Sewage/*chemistry Soil/*analysis Vola;
Notes:		"MedlineCai, Quan-Ying Mo, Ce-Hui Lu, Huixiong Zeng, Qiao-Yun Wu, Qi-Tang Li, Yan-Wen eng Research Support, Non-U.S. Gov't England 2011/12/07 Bioresour Technol. 2012 Dec; 126:453-7. doi: 10.1016/j.biortech.2011.11.039. Epub 2011 Nov 20"