College of Chemical Engineering, China University of Petroleum, Beijing, China.
Water Sci Technol. 2012;66(4):895-902. doi: 10.2166/wst.2012.269.
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 R(2) of 0.73. The relationship between raw sludge organic content and treated sludge dewatering was linear with an R(2) of 0.86 and 0.65 for pilot and bench pre-treatments, respectively. Household and oil sludge possessed incineration possibilities with high heat value. Industrial and oil sludge filtrate was unsuitable for digestion to recover bioenergy.
共选择了 14 种来自生活污水、生活污水与工业废水混合、工业和含油废水处理厂的污泥，以评估热解预处理的效果和适应性。采用中试和小试热解实验（170°C/60min），研究了有机溶出、脱水改善、体积减少、高强度滤液生物降解和脱水污泥焚烧。结果表明，污泥类型对处理效果有显著影响。有机含量对热效应有主要影响。悬浮固体（SS）溶出与原污泥有机含量之间呈线性关系，R²为 0.73。原污泥有机含量与处理后污泥脱水之间呈线性关系，中试和小试预处理的 R²分别为 0.86 和 0.65。家用和含油污泥具有高热值焚烧的可能性。工业和含油污泥滤液不适合消化回收生物能源。
