Division of Sustainable Energy and Environmental Engineering, Osaka University, Suita, Osaka, Japan.
Water Sci Technol. 2010;61(2):365-73. doi: 10.2166/wst.2010.827.
An energy consumption model was developed for evaluating sewage sludge treatment plants (SSTPs) incorporating various treatment processes such as thickening, anaerobic digestion, dewatering, incineration, and melting. Based on data analyses from SSTPs in Osaka, Japan, electricity consumption intensities for thickening, anaerobic digestion, dewatering, incineration, and melting and heat consumption intensities for anaerobic digestion, incineration, and melting were expressed as functions of sludge-loading on each unit process. The model was applied for predicting the energy consumption and greenhouse gas (GHG) emissions of SSTPs using various treatment processes and power and heat generation processes using digestion gas. Results showed that SSTPs lacking incineration and melting processes but having power generation processes showed excess energy production at the high sludge-loading rate. Energy consumption of the SSTPs without incineration and melting processes were low, but their GHG emissions were high because of CH(4) and N(2)O emissions from sludge cake at the landfill site. Incineration and melting processes consume much energy, but have lower CH(4) and N(2)O emissions.
开发了一个用于评估污水处理厂（SSTP）的能源消耗模型，该模型结合了各种处理工艺，如浓缩、厌氧消化、脱水、焚烧和熔融。基于日本大阪 SSTP 的数据分析，将浓缩、厌氧消化、脱水、焚烧和熔融的电耗强度以及厌氧消化、焚烧和熔融的热耗强度表示为每个单元过程的污泥负荷的函数。该模型用于预测使用各种处理工艺和使用消化气发电的工艺的 SSTP 的能源消耗和温室气体（GHG）排放。结果表明，缺乏焚烧和熔融工艺但具有发电工艺的 SSTP 在高污泥负荷率下表现出过量的能源生产。没有焚烧和熔融工艺的 SSTP 的能源消耗较低，但由于填埋场污泥饼中的 CH(4) 和 N(2)O 排放，其 GHG 排放较高。焚烧和熔融工艺消耗大量能源，但 CH(4) 和 N(2)O 排放较低。
