厌氧水解-活性污泥法的生命周期能耗分析

运用生命周期分析技术可从全过程的视角识别和比较不同城市污水处理工艺在其生命周期各个阶段的能耗 ,并在此基础上提出改善其能效的措施。本文运用LCA方法对厌氧水解 -活性污泥法处理系统从其原材料开采和加工开始直至污水厂施工建设、处理运行以及废弃拆除的LC全过程能耗进行了识别和量化分析 ,并与普通活性污泥法进行了平行对照。研究结果表明 ,在微孔和穿孔管两种曝气条件下与普通活性污泥法相比 ,厌氧水解法的LC能耗分别节省 14.0 %和 17.6%。由于污泥产量较低 ,厌氧水解法的比能耗大幅度提高 67.7%～ 77.7%。

Life-cycle Analysis of Energy Use in Anaerobic Acidification-Activated Sludge Process

The anaerobic acidification-activated sludge process has been evaluated using the technique of "life-cycle analysis"to identify and quantify its energy use, starting from raw material extraction, through manufacture to plant construction, treatment operation and plant demolition. This enabled a comparison to be made between process options, and the identification of opportunities for the improvement of energy consumption. In this study, a comparison of AAAS process and conventional activated sludge process has shown that the AAAS process, with lower rate of sludge production, was found to have 67.7-77.7% higher specific energy consumption and use 14.0-17.6 % less LC energy than the conventional process.