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http://dx.doi.org/10.17137/korrae.2016.24.2.15

A Study on Environmental and Economic Analysis for Each Treatment of Sewage Sludge(II) - Results of Economic Analysis -  

Lee, Dongjin (National Institute of Environmental Research, Environmental Resource Research Department)
Lee, Suyoung (National Institute of Environmental Research, Environmental Resource Research Department)
Kwon, Younghyun (National Institute of Environmental Research, Environmental Resource Research Department)
Cho, Yuna (National Institute of Environmental Research, Environmental Resource Research Department)
Bae, Jisu (National Institute of Environmental Research, Environmental Resource Research Department)
Publication Information
Journal of the Korea Organic Resources Recycling Association / v.24, no.2, 2016 , pp. 15-29 More about this Journal
Abstract
This study investigated the environmental and economical assessment for sewage sludge treatment options including biogasification, incineration, carbonization, drying, and solidification. Considering B/C ratio for an anaerobic digestion treatment, for $270,000m^3/d$ (over $1,150m^3/day$), B/C was 1, as the moisture content increased to 95 %, B/C was 1 for $100000m^3/d$ (capacity of $400m^3/day$). Anaerobic digestion+solidification was the most economically feasible, then Anaerobic digestion+incineration and anaerobic digestion+drying were the next economically feasible and then anaerobic digestion+carbonization was the least economically feasible. If anaerobic digestion efficiency was improved to 45%, the treatment costs for anaerobic digestion+carbonization, anaerobic digestion+incineration and anaerobic digestion+drying were decreased to 3,000~5,000 won/t and the costs for anaerobic digestion+solidification was decreased to 2,000~3,000 won/t due to increasing of the beneficial cost of the biogas production.
Keywords
sewage sludge; economical assessment; environmental assessment; anaerobic digestion;
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