A novel hollow-fibre membrane biofilm reactor for autohydrogenotrophic denitrification of drinking water

Author:

Lee K-C.1,Rittmann B.E.1

Affiliation:

1. Northwestern University, Department of Civil Engineering, 2145 Sheridan Road, Evanston, IL 60208–3109, USA

Abstract

A novel hollow-fiber membrane biofilm reactor (HFMBR) was developed to remove nitrate from contaminated drinking water using molecular hydrogen as a clean electron-donor substrate. The hollow fibers were sealed on one end and were pressurized with hydrogen on the other end. The counter-diffusion transfer of nitrate and hydrogen allowed 100% hydrogen transfer efficiency into the biofilm and achieved up to 99.9% hydrogen-utilization efficiency for denitrification. Partial denitrification met regulatory standards for nitrate and nitrite at the same time that relatively high steady-state nitrate fluxes (0.08 and 0.1 mg N/cm2−d) were achieved with liquid-phase hydrogen concentrations (0.009 and 0.07 mg H2/l) magnitudes lower than in previous studies. The low frequency of fiber-to-fiber contact in the upflowing liquid established good biofilm accumulation. The specific biofilm detachment rates were between 0.015 and 0.017 day−1, which attained biofilm thickness up to 179 μm. Finally, DOC and BDOC analyses showed that the DOC was increased, while the effluent BDOC was 0.5 mg/l.

Publisher

IWA Publishing

Subject

Water Science and Technology,Environmental Engineering

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3