Eco-Reuse: Chloramine-free water reuse solution


14 May 2018

Eco-Reuse: Chloramine-free water reuse solution  - Water. desalination + reuse

Now available to view on-demand

Water scarcity around the globe increases the need to make better use of the available water sources. Wastewater Treatment Plant (WWTP) effluent is a readily available source, with numerous environmental benefits and long track record of successful installations.

Conventional water reuse typically includes UF, RO and UV/AOP process units, with the dosage of Chloramine to control biofouling of the membranes. However, Chloramine is a precursor to the formation of NDMA - a dangerous organic contaminant and a suspected carcinogen. Its concentration is currently limited to 10 ng/l in California and other places. In addition, the presence of Chloramine increases the risk of membrane oxidation and lowers the UVT value of the permeate, thereby increasing the CAPEX and OPEX of the UV/AOP treatment unit.

IDE has developed a Chloramine-free water reuse process. Instead of Chloramine dosage to control biofouling, periodic cleaning of the RO membrane is done by injection of a short, highly concentrated saline solution that causes forward osmosis and bacteria dehydration. In addition, periodic flushing of the membranes with permeate water reduces the risk of scaling formation, thereby keeping the membranes constantly clean. This also lowers the chemical consumption, offering a more environment-friendly water reuse

The results from a demonstration facility in Pismo Beach (California) will be presented.


Presenter







N.B. The information contained in this entry is provided by IDE Technologies, and does not necessarily reflect the views and opinions of the publisher.

© Faversham House Group Ltd 2018. Water. desalination + reuse articles may be copied or forwarded for individual use only. No other reproduction or distribution is permitted without prior written consent.