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http://dx.doi.org/10.14481/jkges.2014.15.10.15

Studies of Pretreatment Mehtods for Additional Reduction of Sewage Sludge  

Kim, Seogku (Construction Environment Research Team, Korea Institute of Construction Technology)
Kim, Jahyun (Department of Environmental Engineering, Pukyong National University)
Lim, Junhyuk (Department of Chemical Engineering, Pukyong National University)
Lee, Jeakun (Department of Environmental Engineering, Pukyong National University)
Lee, Taeyoon (Department of Environmental Engineering, Pukyong National University)
Publication Information
Journal of the Korean GEO-environmental Society / v.15, no.10, 2014 , pp. 15-21 More about this Journal
Abstract
In this study, biochemical methane potential test was conducted to estimate ultimate methane and carbon dioxide yield for anaerobic digestion and pretreatment with sewage sludge cake. Two of 0.2 % TS of sewage sludge cakes were treated with 5M NaOH or sonication of 0.51 W/mL during 30 min respectively. Another sample was treated simultaneously with NaOH and sonication in same condition. Then, initial soluble COD increased from 33.1 mg/L to 494 mg/L. After BMP test, methane production ranged from 3.12 and 84.2 mL $CH_4$ per g of Volatile Solid (VS) and 9.2 and 13.5 mL $CO_2$ per g of Volatile Solid (VS) for carbon dioxide. In other tests, injection of nutrient media or sludge supernatant produced 73.1 and 73.8 mL $CH_4$ per g of Volatile Solid (VS) and 11.2 and 13.6 mL $CO_2$ per g of Volatile Solid (VS) respectively. When BMP test finished, 62 % of initial volatile solids decreased to 33.8~45.4 %. Simultaneous pretreatment increased soluble COD, reduction rate of volatile solids and digestion efficiency than those for alkaline and ultrasonic pretreatment.
Keywords
Sewage sludge cake; BMP test; Alkaline treatment; Ultrasonic pretreatment; Methane;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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