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論文投稿 Comparative evaluation of anaerobic digestion for sewage sludge and various organic wastes with simple modeling

作成年度 2015 年度
論文名 Comparative evaluation of anaerobic digestion for sewage sludge and various organic wastes with simple modeling
論文名(和訳)
論文副題
発表会
誌名 Waste Management
巻・号・回 43
発表年月日 2015/08/01
所属研究室/機関名 著者名(英名)
Public Works Research InstituteTaira Hidaka
Public Works Research InstituteFeng Wang
Public Works Research InstituteJun Tsumori
抄録
Anaerobic co-digestion of sewage sludge and other organic wastes, such as kitchen garbage, food waste, and agricultural waste, at a wastewater treatment plant (WWTP) is a promising method for both energy and material recovery. Substrate characteristics and the anaerobic digestion performance of sewage sludge and various organic wastes were compared using experiments and modeling. Co-digestion improved the value of digested sewage sludge as a fertilizer. The relationship between total and soluble elemental concentrations was correlated with the periodic table: most Na and K (alkali metals) were soluble, and around 20-40% of Mg and around 10-20% of Ca (alkaline earth metals) were soluble. The ratio of biodegradable chemical oxygen demand of organic wastes was 65-90%. The methane conversion ratio and methane production rate under mesophilic conditions were evaluated using a simplified mathematical model. There was reasonably close agreement between the model simulations and the experimental results in terms of methane production and nitrogen concentration. These results provide valuable information and indicate that the model can be used as a pre-evaluation tool to facilitate the introduction of co-digestion at WWTPs.
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