Adsorption Treatment of Reverse-Osmosis Concentrate from Water-Treatment Units at Thermal Power Stations


如何引用文章

全文:

开放存取 开放存取
受限制的访问 ##reader.subscriptionAccessGranted##
受限制的访问 订阅存取

详细

Make-up water is treated at thermal power stations (TPS) with high-pressure or superhigh pressure boilers using membrane processes implemented in ultrafiltration, microfiltration, or reverse-osmosis (RO) units. Among the criteria of the efficiency of reverse osmosis units is the amount of highly mineralized effluents (or concentrate). At present, the RO concentrate is disposed of at TPSs by discharging it into an industrial sewage system in accordance with the applicable standards on the salt content limit of waste water, routing it into a district heating network, or returning it into recirculation water supply systems, decreasing as far as possible the volume of the discharged concentrate which is to be reused, for example, in regeneration of Na-cation exchangers installed upstream of the reverse-osmosis unit. The adsorption process is proposed for treatment of the reverse-osmosis concentrate using sludge from the makeup water treatment. The characteristics of carbonate sludge are presented. The regularities of adsorption of sulfate- and chloride-anions from the RO concentrate by carbonate sludge are described. An adsorption isotherm was obtained. The mechanism of adsorption on a sorption material is proposed. The effect of pH on adsorption of sulfate- and chloride-ions by a sorption material was investigated. A system is proposed for the treatment of the concentrate from the RO units at the Kazan Cogeneration Power Station TETs-2 to remove sulfate- and chloride anions using a three-stage adsorption method with a counter-current injection of the sorbent, namely, the carbonate sludge. The calculated values of the consumption of the sorption material required to achieve the desired residual concentration of sulfate- and chloride-anions in the treated water are presented. The economic effectiveness from implementation at the Kazan TETs-2 of the adsorption treatment of the RO concentrate by carbonate sludge to remove sulfate- and chloride-ions is estimated.

作者简介

L. Nikolaeva

Kazan State Power Engineering University

编辑信件的主要联系方式.
Email: larisanik16@mail.ru
俄罗斯联邦, Kazan, 420066

A. Minneyarova

Kazan State Power Engineering University

Email: larisanik16@mail.ru
俄罗斯联邦, Kazan, 420066

补充文件

附件文件
动作
1. JATS XML

版权所有 © Pleiades Publishing, Inc., 2019