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http://dx.doi.org/10.17137/korrae.2016.24.3.35

The Effect of Solubilization Pretreatment Process on Anaerobic Digestion of Waste Activated Sludge  

Yoo, Ho-Sik (Department of Environmental and Energy Eng., Kyonggi University)
Ahn, Seyoung (Department of Environmental and Energy Eng., Kyonggi University)
Publication Information
Journal of the Korea Organic Resources Recycling Association / v.24, no.3, 2016 , pp. 35-43 More about this Journal
Abstract
COD properties of waste activated sludge (WAS) were investigated for various solubilization rate of mechanical pretreatment method in anaerobic digestion process. Inert COD was 37.0% of total COD in untreated WAS. Particulate biodegradable COD was converted to soluble biodegradables and particulate unbiodegradables as solubilization was processed. Particulate unbiodegradable portion of COD in WAS can be increased as particulate biodegradable portion is decreased in case of relatively long SRT of biological treatment. Thus, COD properties of WAS should be investigated in case of relatively low particulate biodegradable COD, because of possible low effect of solubilization. COD removal rate in anaerobic digester was enhanced as much as 2.1% and 15.1% for solubilization rate 5% and 35% due to pretreatment, respectively. COD removal rate was increased from 25% to 40%, and methane gas generation was increased from $607m^3/d$ to $907m^3/d$ as particulate COD of WAS was solubilized to 35% in pretreatment facilities.
Keywords
Pretreatment; Solubilization; Waste activated sludge (WAS); Methane gas generation;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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