基于厌氧氨氧化的城市污水处理厂能耗分析

基于小试和示范工程的试验研究结果,对基于一体化厌氧氨氧化工艺的城市污水处理厂进行了综合分析和评价.首先针对主要污染物质进行物质平衡分析,结果表明:与传统A²O城市污水处理工艺技术相比,基于厌氧氨氧化工艺的污水处理厂能在保证出水总氮达一级A排放标准的同时,有机物回收量增加1倍.进一步考察了厌氧氨氧化工艺对城市污水处理厂能耗的影响.曝气能耗的降低和厌氧消化工艺中甲烷产量的提高,使得城市污水处理厂的理论能量自给率达到90%.物质平衡分析和能耗分析表明:厌氧氨氧化工艺提高污水厂能量自给率的关键在于实现了污水中有机物和氮污染物去除的分离.

Energy Consumption of the Municipal Wastewater Treatment Plant With Anammox Process

Based on the experimental results of the lab-scale reactor and the operational data of the demonstration project, the wastewater treatment plant with one-stage anammox process was comprehensively evaluated and analyzed in this paper. Firstly, the mass balance of the COD and nitrogen was analyzed. The analysis showed that the effluent of wastewater treatment plant based on anammox process could meet one-class A permitted criteria and the recovery of organic matter doubled when comparing to the traditional A2 O wastewater treatment process. We further investigated the effect of anammox process on energy consumption of the wastewater treatment plant. Due to the reduction of aeration energy consumption and the improvement of methane production in anaerobic digestion process, the theory energy self-sufficiency efficiency of 90% could be achieved. The analysis of mass balance and energy consumption indicated that the separate removal of organic matter and nitrogen in the wastewater pollutants was the key to enhance energy self-sufficiency efficiency.