Design considerations for biological ion exchange drinking water filters: Resin selection, backwash, and regenerations

Author:

Zimmermann Karl1ORCID,Chen William Szu‐Wei1ORCID,Wright Jaycee1,Mohseni Madjid1ORCID

Affiliation:

1. Chemical and Biological Engineering University of British Columbia Vancouver British Columbia Canada

Abstract

AbstractTwo pilot studies provide insights into the design and operations of biological ion exchange (BIEX) drinking water filters. A lab‐scale pilot with strong‐base anionic (SBA) and weak‐base anionic (WBA) resins demonstrated 35% and 31% removal of dissolved organic carbon (DOC) up to 30 months, until secondary ion exchange exhaustion. While the WBA resins exhibited 14% less removal of DOC, their larger capacity doubled the duration until filter exhaustion. WBA filters were less affected than their SBA counterparts by sulfate‐containing inlet waters. In a second pilot, while water with high DOC yielded rapid exhaustion of SBA resins, air scouring increased the breakup of filter media and improved solids removal by 30× compared to hydraulic backwash alone. Significantly, DOC removal improved by 36% for a week following air scour. Key recommendations include the use of WBA resins to extend operating life while implementing air scouring can dramatically improve short‐term DOC removal.

Publisher

Wiley

Subject

Water Science and Technology,Environmental Engineering,General Chemistry,Filtration and Separation

Cited by 1 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Biological contributions to biological ion exchange;Environmental Science: Water Research & Technology;2024

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