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http://dx.doi.org/10.17137/korrae.2017.25.1.15

Enhanced Acidification Efficiency of Sewage Sludge by Seaweed Addition  

Shin, Sang-Ryong (Department of Civil Engineering, Inha University)
Lee, Mo-Kwon (Department of Civil Engineering, Inha University)
Kim, Min-Gyun (Department of Civil Engineering, Inha University)
Hong, Seong-Min (Aqua Tech)
Kim, Dong-Hoon (Department of Civil Engineering, Inha University)
Publication Information
Journal of the Korea Organic Resources Recycling Association / v.25, no.1, 2017 , pp. 15-21 More about this Journal
Abstract
In the present work, the synergistic effect of seaweed addition on organic acid production from sludge was investigated. The batch experiment was conducted at various mixing ratios of sewage sludge and seaweed (100:0, 75:25, 50:50, 25:75, 0:100 on a COD basis) under the substrate concentration of 20 g COD/L. The fermentation temperature was conducted under mesophilic condition ($35^{\circ}C$) and a heat-treated ($90^{\circ}C$ for 20 min) anaerobic digester sludge was used as a seeding source to suppress the methanogenic activity, The results showed that the amount of organic acid production increased as the content of seaweed increased: organic acids were 1.45, 3.22, 4.28, 5.24 and 4.82 g COD/L for the mixing ratio of 100:0, 75:25, 50:50, 25:75 and 0:100 respectively. The synergistic effect was calculated based on the organic acid production of individual sludge and seaweed, and was found to be 0.92, 1.14, 1.26 g COD/L at the mixing ratio of 75:25, 50:50 and 25:75, which indicates that 40% of synergy was obtained when 25% of seaweed was added. The synergistic effect could be ascribed to the high C/N ratio and biodegradability of seaweed.
Keywords
Sewage sludge; Seaweed; Organic acids; Synergistic effect;
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Times Cited By KSCI : 1  (Citation Analysis)
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