生活污水含有大量可降解有机物,在厌氧条件下可以产生温室气体.IPCC(联合国政府间气候变化专门委员会)指南提供的计算温室气体的方法中,BOD5和CODcr是计算CH4排放的重要参数.以BOD5和CODcr生化构成特性和数学模型为基础,对2005年347家城镇污水处理厂的ρ(BOD5)和ρ(CODcr)数据进行分析,研究生活污水中ρ(BOD5)与ρ(CODcr)关系的区域性差异.结果表明,生活污水中ρ(BOD5)与ρ(CODcr)间的相关关系存在明显的区域特征,这种区域性差异主要由污水的来源和其理化特性决定·总体来看,ρ(BOD5)/ρ(CODcr)值基本在0.4～0.5之间·在省级温室气体估算过程中,各省区可采用本地特有的ρ(BOD5)/ρ(CODcr)值,进行源自生活污水的CH4排放计算.%Large amounts of degradable organics in domestic wastewater generate greenhouse gases under anaerobic conditions. BOD5 and CODCr are important parameters provided by the IPCC guidelines for calculating greenhouse gas emissions. Based on the biochemical formation characteristics and a mathematical model of BOD, and CODCr, the mass concentrations of BOD, and CODCr from 347 wastewater treatment plants in 2005 were analyzed, and the regional differences in the p(BOD5)/p(CODCr) were discussed. The results show that there were obvious regional characteristics in the correlation between p( BOD5) and p(CODCr) , which were mainly determined by the origin and physicocheraical characteristics of the wastewater. Overall, the p(BOD5)/ p(CODCr) ranged between 0.4 and 0. 5. The provincial specific values of p( BOD, )/p( CODCr) can be used for calculating provincial greenhouse gas emissions from domestic wastewater.
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