标准编号：ISO 21939-1:2019
中文名称：计算和表示用于水再利用的工业废水处理能耗的方法 第1部分：生物过程
英文名称：A method to calculate and express energy consumption of industrial wastewater treatment for the purpose of water reuse — Part 1: Biological processes
发布日期：2019-05
标准范围
This document sets out the general principles for, and provides guidance on, the quantitative
characterization of the energy consumed by industrial biological wastewater treatment systems. It
does not aim to characterize the treatment pollutants removal performance or process reliability or
any other consideration in the selection of a wastewater treatment system.
This document includes the following sub-systems of biological treatment system:
— Biological reactors, which might be suspended growth or fixed film processes or a combination
thereof, and can include anaerobic, anoxic and/or aerobic tanks and/or zones.
— Solid-liquid separation processes such as sedimentation, flotation, or membrane filtration, used for
clarification of the water before discharge to downstream processes, which can also involve the
return of a the separated solids as sludge back to the biological reactor.
— Any pumps, blowers and mixers for water circulation, mixing and air supply in and between the
sub-systems listed herein.
— Heating or cooling of the water for treatment.
This document does not include the following subsystems of the biological treatment system:
— Wastewater feed pumps.
— Pre-treatment systems, which for the purposes of this document also include preliminary and
primary treatment processes, such as but not limited to, screening, sedimentation, dissolved air
flotation, chemical oxidation, oil separation.
— Post-treatment processes, such as but not limited to, disinfection, desalination, ion exchange, sludge
treatment and handling systems.
— Site lighting or any energy consumption involved in office operation.
— Energy recovery from processes such as anaerobic reactors producing biogas.
Filtration processes, which are sometimes part of the biological treatment process and at other times
part of the post treatment, are referred to separately within this document.
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