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J Hazard Mater

Title:		Pyrolytic product characteristics of biosludge from the wastewater treatment plant of a petrochemical industry
Author(s):		Lin KH; Hsu HT; Ko YW; Shieh ZX; Chiang HL;
Address:		"Department of Environmental Engineering, Fooyin University, Kaohsiung, Taiwan"
Journal Title:		J Hazard Mater
Year:		2009
Volume:		20090606
Issue:		1-Mar
Page Number:		208 - 214
DOI:		10.1016/j.jhazmat.2009.05.127
ISSN/ISBN:		1873-3336 (Electronic) 0304-3894 (Linking)
Abstract:		"Biosludge was produced from the wastewater treatment plant of a petrochemical industry. The element compositions of pyrolytic residues, CO, CO(2), NOx, SOx, total hydrocarbons and detailed volatile organic compounds of pyrolytic gas, and C, H, N, S content and compositions in biofuel were determined in this study. Generally, 75-80% water content in sludge cakes and about 65-70% weight of water vapor and volatile compounds were volatilized during the drying process. Propene, propane, 1-butene, n-butane, isobutene, toluene and benzene were the major volatile organic compounds (VOCs) of the pyrolytic gas, and the concentrations for most of the top 20 VOC species were greater than 5 ppm. C(5)-C(9) compounds contributed 60% by weight of biofuel; 4-hydroxy-4-methyl-2-pentanone was the highest species, accounting for 28-53% of biofuel at various pyrolytic temperatures. Based on the dried residues, there was 8.5-13% weight in pyrolytic residues, 62-82% weight in liquid products (water and crude oil) and 5.8-30% weight in the gas phase after pyrolytic processing at 500-800 degrees C. Finally, 1.5-2.5 wt% liquid fuel was produced after the distillation process. The pyrolytic residues could be reused, the pyrolytic liquid product could be used as a fuel after distillation, and the pyrolytic gas could be recycled in the pyrolytic process to achieve non-toxic discharge and reduce the cost of sludge disposal"
Keywords:		"Biofuels Carbon/chemistry Gases Hydrocarbons/analysis *Industrial Waste Sewage/*chemistry Temperature Trace Elements/analysis Volatile Organic Compounds Waste Disposal, Fluid/methods Water/chemistry Water Purification/*methods;"
Notes:		"MedlineLin, Kuo-Hsiung Hsu, Hui-Tsung Ko, Ya-Wen Shieh, Zhu-Xin Chiang, Hung-Lung eng Research Support, Non-U.S. Gov't Netherlands 2009/07/03 J Hazard Mater. 2009 Nov 15; 171(1-3):208-14. doi: 10.1016/j.jhazmat.2009.05.127. Epub 2009 Jun 6"