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http://dx.doi.org/10.17137/Korrae.2012.20.3.83

Microalgae Removal and Energy Production by Combined Electro-flotation and Anaerobic Hydrogen Fermentation Processes  

Lee, Chae-Young (Department of Civil Engineering, The University of Suwon)
Na, Dong-Chae (Department of Civil Engineering, The University of Suwon)
Choi, Jae-Min (Department of Civil Engineering, The University of Suwon)
Kang, Doo-Sun (Department of Civil Engineering, The University of Suwon)
Publication Information
Journal of the Korea Organic Resources Recycling Association / v.20, no.3, 2012 , pp. 83-88 More about this Journal
Abstract
The algal bloom, resulting from eutrophication, has caused serious water quality problems in river and lake. Therefore, it has to be removed by any means including physicochemical or biological treatment for preserving water quality. This study was conducted to investigate the microalgae removal and energy production using combined electro-flotation and anaerobic hydrogen fermentation processes. The result showed that algae removal efficiency based on chlorophyll a removal increased with the current. At a current of 0.6A, the maximum microalgae removal efficiency of 95.9% was achieved. The treatability of anaerobic hydrogen fermentation was investigated to recover energy from microalgae removed by electro-flotation. The ultimate hydrogen yields of algae before and after ultrasonic pretreatment were 17.3 and 61.1 ml $H_2/g$ dcw(dry cell weight), respectively. The ultrasonic pretreatment of algae led to 3.4-fold higher $H_2$ production due to the increase of hydrolysis rate.
Keywords
Microalgae; Electro-flotation; Anaerobic hydrogen fermentation; Hydrogen yield; Ultrasonic pretreatment;
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