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Solubility Improvement of Foodwaste by SeCAH and Potential Inhibitors for Anaerobic Co-Digestion  

Kim, Mi-Hwa (Department of Civil Engineering, Hankyang University)
Kim, Se-Mi (Department of Environmental Engineering, Hangyung National University)
Jeon, Sang-Youn (Graduate School of Biology, Environment, Information and Communication)
Nam, Se-Yong (Department of Environmental Engineering, Hangyung National University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.30, no.10, 2008 , pp. 1028-1033 More about this Journal
Abstract
Sequential quick crushing and alkali hydrolysis(SeCAH), as a pretreatment for foodwaste, incorporating mechanical crushing and alkali hydrolysis was proposed and investigated in this study. Focuses were placed on the improvement of biodegradability of foodwaste and the estimation of potential inhibitors for anaerobic digestion. The solubility of the pretreated foodwaste by SeCAH was increased 2.5 times rather than mechanical crushing. Considering solubility improvement and energy consumption, 2,000 rpm of crushing strength and 5$\sim$10 sec of crushing time are recommended. After SeCAH, the fraction of large organic particles(>2.36 mm) of foodwaste was sharply decreased from 88.0% to 29.0%, otherwise the fraction of small particles(<75 $\mu$m) was greatly increased from 10.5% to 40.7%. Ammouinum, potassium and sulfate were estimated as potential inhibitors for anaerobic digestion and their concentrations in pig slurry were 3331.3 mg/L, 4256.5 mg/L and 1017.5 mg/L, respectively.
Keywords
Anaerobic Co-digestion; Crushing Strength; Foodwaste; Organic Particle Size; SeCAH(Sequential Quick Crushing and Alkali Hydrolysis);
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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