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Investigation of the Optimum Operational Condition of Bio-Hydrogen Production from Waste Activated Sludge  

Kim, Dong-Kun (Hazardous Substances Research Center, Korea Institute Science and Technology)
Lee, Yun-Jie (Hazardous Substances Research Center, Korea Institute Science and Technology)
Yu, Myong-Jin (Department of Environmental Engineering, University of Seoul)
Pak, Dae-Won (The Graduate School of Energy & Environment, Seoul National University)
Kim, Mi-Sun (Biomass Research Center, Korea Institute of Energy Research)
Sang, Byoung-In (Hazardous Substances Research Center, Korea Institute Science and Technology)
Publication Information
Journal of Korean Society of Environmental Engineers / v.28, no.4, 2006 , pp. 362-367 More about this Journal
Abstract
Waste activated sludge(WAS) collected from domestic wastewater treatment plant is biomass that contains large quantities of organic matter. However, relevant literature show that the bio-hydrogen yield using WAS was too low. In this study, the effect of pretreatment of WAS on hydrogen yield was investigated. Pretreatment includes acid and alkali treatments, grinding, heating, ozone and ultrasound methods. After pretreatment organic matters of WAS were solubilized and soluble chemical oxygen demand(SCOD) was increased by 14.6 times. Batch experiments were conducted to investigate the effects of pre-treatment methods and buffer solution, hydrogen partial pressure, and sodium ion on hydrogen production from WAS by using heated anaerobic mixed cultures. Experimental results showed that addition of buffer solution, efficient pre-treatment method with alkali solution, and gas sparging condition markedly increased the hydrogen yield to 0.52 mmol $H_2/g$-DS.
Keywords
Waste Activated Sludge; Bio-Hydrogen Production; Heated Anaerobic Mixed; Cultures Pretreatment Method;
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