污水厂污泥典型处理处置工艺碳排放核算研究

污泥的处理与处置是污水厂运行过程中碳排放的主要产生源之一。基于联合国政府间气候变化专门委员会(IPCC)的方法学原则,构建污泥处理处置过程中产生的碳排放及碳汇的核算方法,并以某污水厂污泥的处理处置过程为例,计算其典型工艺下运行的碳排放量,分析其碳排放特征并提出减排建议。结果表明:深度脱水和填埋是污泥处理处置碳排放的主要来源;污泥厌氧消化产生的沼气用于消化温度维持和干化工艺,具有显著的减排效应;污泥土地利用具有低碳排放效应特征,是污泥处理处置低碳发展的优选模式。

STUDY ON CARBON EMISSION ACCOUNTING FOR TYPICAL PROCESSES OF SEWAGE SLUDGE TREATMENT AND DISPOSAL

Sludge treatment and disposal process is one of the main sources of carbon emissions from wastewater treatment plants(WWTP).Based on the methodology of the Intergovernmental Panel on Climate Change (IPCC),a set of calculation methods for carbon emission and carbon sink of sludge treatment and disposal process was established.A case WWTP was chosen to investigate the carbon emission characteristics of sludge treatment and disposal,and the suggestions on carbon emission reduction were put forward.The results showed that sludge deep dewatering and landfilling were the major sources of the total carbon emissions.Anaerobic digestion process was an important carbon emission reduction process.Sludge land utilization represented low carbon emission performance,which was the recommended choice of sludge treatment and disposal.