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Water Science & Technology Vol 66 No 4 pp 895–902 © IWA Publishing 2012 doi:10.2166/wst.2012.269 Treatment of 14 sludge types from wastewater treatment plants using bench and pilot thermal hydrolysisWei Qiao, Yifei Sun and Wei WangCollege of Chemical Engineering, China University of Petroleum, Beijing 102249, China and State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China E-mail: qiaowei@cup.edu.cn; qiaowmsg@gmail.comSchool of Chemistry and Environment, Beihang University, Beijing 100191, China School of Environment, Tsinghua University, Beijing 100084, China ABSTRACT A total of 14 types of sludge from household sewage, mixture of domestic and industrial wastewater, and industrial and oil wastewater treatment plants were selected to evaluate the effectiveness and adaptability of thermal hydrolysis pre-treatment. Organic solubilization, dewatering improvement, volume reduction, high-strength filtrate biodegradation, and dewatered sludge incineration were investigated using bench and pilot thermal hydrolysis experiments (170 °C/60 min). Results showed that sludge types significantly affected the treatment effects. Organic content has a primary influence on thermal effects. The relationship between suspended solid (SS) solubilization and raw sludge organic content was linear with an Keywords: biodegradation; dewatering; incineration; sludge; thermal hydrolysis eProduct: Buy this article for £24.00 (IWA MEMBER PRICE: £18.00) All prices include VAT. For customers where VAT should not be applied, the VAT amount will be removed upon payment |
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