Enzymatic hydrolysis of food waste and methane fermentation using UASB reactor
This study was conducted to investigate the effect of enzymatic hydrolysis on the solubilization of volatile suspended solid (VSS) in food waste (FW) with commercial enzymes; carbohydrase, protease and lipase, and also to estimate methane production potential of FW liquor hydrolysed by enzymes with an upfolw anaerobic sludge blanket (UASB) reactor. In single enzymatic reaction, the protease exhibited the highest hydrolysis rate of VSS among the three types of enzymes. At a mixed enzymatic hydrolysis, the mixture ratio of 1:2:1 with carbohydrase:protease:lipase, and 0.3% (w/w FW) of its mixture dose showed the highest VSS reduction and chemical oxygen demand (COD) generation. A methane fermentation using FW liquor was carried out with stepwise increase of organic loading rates (OLR) from 1.6 to 13.2 g COD/L/d. Over 95% of COD removal efficiency and 67-75% of high methane content were consistent up to the loading rate of 9.1 g COD/L/d but significantly decrease at over 11.1 g COD/L/d. 0.35 L CH4/g-CODremoved of high methane yield was obtained at 9.1 g COD/L/d. These results indicated that enzymatic hydrolysis in conjunction with methane production by UASB reactor could provide a novel alternative in conventional methane production system from FW.
food waste enzymatic hydrolysis methane fermentation UASB Bioreactor
H. C. MOON I. S. SONG J. C. KIM Y. SHIRAI D. H. KIM
Department of Environmental Research, Gyeonggi-do Institute of Health andEnvironment, Suwon 440-290, Department of Biological Functions and Engineering, Graduate School of Life Science and Systems Engi Industrial and Academic Cooperation Division, Korea Bio Polytechnic, Nonsan 320-905, South Korea
国际会议
The 12th Asian Pacific Confederation of Chemical Engineering Congress(第十二届亚太化工联盟大会暨化工展览会)
大连
英文
2008-08-04（万方平台首次上网日期，不代表论文的发表时间）