Characterization and Mitigation of Biofouling on RO Membrane in Seawater Desalination
博士 === 國立交通大學 === 環境工程系所 === 97 === Penghu archipelago, Kinmen, and Matsu islands are arid area, where water supply depends solely on the desalination of seawater and brackish groundwater. The desalination plants face serious fouling problems similar to those in other parts of the world. The opera...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2009
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| Online Access: | http://ndltd.ncl.edu.tw/handle/94592776782339480400 |
| Summary: | 博士 === 國立交通大學 === 環境工程系所 === 97 === Penghu archipelago, Kinmen, and Matsu islands are arid area, where water supply depends solely on the desalination of seawater and brackish groundwater. The desalination plants face serious fouling problems similar to those in other parts of the world. The operators have being struggling to solve these problems with frequent cleaning and switching to more powerful cleaning reagents through trial and error. Effective membrane cleaning relies on a thorough understanding of the nature of the foulant. In this study, a seawater RO (SWRO) membranes was autopsied and the characteristics of fouling were diagnosed to provide the plants with information to aid the improvement of the systems regarding fouling mitigation. Literatures and preliminary studies have suggested that biofouling is the major cause of fouling in the SWRO system. A pilot study was established in the Wukan SWRO plant. The survival ratio of microbes deposited on the membranes from the inlet was estimated to investigate the effects of seasonal change and concentration ratio of brine on the microbial activity on the membranes. Mitigation of biofouling was explored by modifying RO membranes with silver nanoparticles. The proliferation of microbes was identified by using PKH26 as the survival cell stain. Foulants was extracted and analyzed at the end of tests provided for discussing with biofouling.
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