ISO 23044:2020 工业废水的软化和脱盐再用指南

标准编号：ISO 23044:2020

中文名称：工业废水的软化和脱盐再用指南

英文名称：Guidelines for softening and desalination of industrial wastewater for reuse

发布日期：2020-07

标准范围

This document provides guidance on, the evaluation and comparison of wastewater softening and
desalination processes for industrial wastewater reclamation and reuse with specific consideration for
the following six: 1) chemical precipitation; 2) ion exchange; 3) nanofiltration (NF); 4) reverse osmosis
(RO); 5) electrodialysis (ED) and 6) electrodeionization (EDI). This document provides guidance on the
characterisation of both influent and effluent quality (e.g. hardness, alkalinity, etc.) and the effects of
these processes on those constituents. The purpose of softening and desalination is only for the reuse usages that have requirements for hardness and salinity, such as cooling circulating water, boiler water,production process water, and cleaning water.
This document includes the following sub-processes of wastewater softening and desalination
processes:
a) wastewater softening processes based on chemical precipitation, ion exchange and NF, which aim
to remove hardness ions, such as Mg²⁺ and Ca²⁺ ;
b) desalination processes based on ion exchange, RO, ED, EDI and NF, which aim to remove the most of total dissolved solids (TDS).
This document is applicable to:
a) industrial saline wastewater, which has been pre-treated to remove most of the organic matters if
necessary;
b) the selection or design of wastewater softening and desalination processes for reuse of wastewater from industries.

标准预览图