OD汚泥と廃油揚げを主体とする7種の廃棄物系バイオマスの高濃度混合消化  [in Japanese] High-solids anaerobic co-digestion of seven kinds of waste biomass mainly consisting of dewatered sludge produced in an oxidation-ditch process and waste fried Tofu.  [in Japanese]

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 To achieve concentrated treatment of several organic wastes and promote the recycle of waste biomass in local towns, a high concentrated continuous co-digestion experiment was conducted in a 1m<sup>3</sup> of mesophilic digester. The waste biomass mixture of which TS was approximately 8.8% consisted of waste sludge from an oxidation ditch process (OD), a contact aeration process and a septic tank, human waste, kitchen garbage and two kinds of fried tofu (raw type and dry type). With an average organic loading rate of 2.5 kg-VS/m<sup>3</sup>/d, digestion operated stably. Biogas yield of waste mixture was 0.29 Nm<sup>3</sup>/kg-VS, and average VS removal ratio was 37%. No significant difference was shown of the dewatering characteristics of digested sludge, compared to the input OD sludge. Fertilizer effect analysis shows that digested sludge quality met the Fertilizer Control Act, , and high fertilizer efficicency was suggested.


  • Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research)

    Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research) 70(7), III_425-III_432, 2014

    Japan Society of Civil Engineers


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