本文件提供了根据温室气体(GHG)排放评估处理系统性能的指南。 为了估计处理系统的温室气体排放量，本文件涵盖了估计、温室气体排放类型和来源、每种温室气体的排放系数以及全球变暖潜力。评估中使用的温室气体的重量相当于处理系统运行期间的排放量。 该文件还定义了一种计算二氧化碳当量（CO2eq）排放强度的方法，其中GHG排放量除以再生水的体积。它还包括一种使用CO2eq排放强度评估处理系统性能的方法。

This document provides guidelines for evaluating the performance of treatment systems on the basis of greenhouse gas (GHG) emissions. In order to estimate greenhouse gas emissions from a treatment system, this document covers the estimate, types of GHG emission and sources, emission factor for each GHG, and global warming potential. The weight of greenhouse gases to be used in an evaluation is equivalent to emissions during operation of a treatment system. This document also defines a method for calculating carbon dioxide equivalent (CO_2eq) emission intensity, in which GHG emissions are divided by the volume of reclaimed water. It also includes a method for evaluating the performance of a treatment system using CO_2eq emission intensity.