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DOI : 10.17640/KSWST.2019.27.3.63 ,    Vol.27, No.3, 63 ~ 75, 2019
Title
Effect of Anaerobic Acid Fermentation from Food Waste on Sludge Reduction and Biogas Production
손병권 Beong Keon Sun , 이광헌 Kwang Hun Lee , 김길수 Gil Su Kim , 최찬섭 Chan Sup Choi , 최희정 Hee-jeong Choi
Abstract
Food wastes were fermented to produce food waste fermentation liquid (FWFL). The purpose of this study was to investigate the influence of organic matter, nutrients, biogas and sludge in anaerobic process using a mixture FWFL and sewage sludge with various ratios. The mixing ratio of sewage sludge to FWFL of 7: 3 (R-2) had the best effect on sludge reduction and biogas production. FWFL influenced the removal of organic matter and nutrients, and TN and SCOD was obtained a maximum reduction of 81.4% and 29.3% by R-2, respectively. Moreover, R-2 consumed 1.7 to 3.2 times more TS and VS than only sewage sludge sample (R-1). In addition, the R-2 sample was found to be 3.9 times higher biogas production than R-1. As a result of analyzing the composition of the produced biogas, the biogas of R-2 had the highest methane content (71%) and was superior in quality to the other samples. Mixing FWFL with sewage sludge was effective in reducing sludge, and also had an effect on the increase of biogas production.
Key Words
Anaerobic fermentation acid liquid, Anaerobic co-digestion, Biogas, Food waste, Sludge reduction
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