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Dry anaerobic co-digestion of food waste and cattle manure: Impact of total solids, substrate ratio and thermal pre treatment on methane yield and quality of biomanure
Bioresource Technology ( IF 9.7 ) Pub Date : 2018-01-11 , DOI: 10.1016/j.biortech.2018.01.050
Vijayalakshmi Arelli , Sameena Begum , Gangagni Rao Anupoju , Kranti Kuruti , Shailaja S.

The objective of the present study is to assess the impact of TS concentration, substrate mixing ratio (co digestion) and thermal pretreatment on biogas production, methane yield, VS reduction (%) and quality of biomanure through dry anaerobic digestion (DAD) of food waste (FW) and cattle manure (CM). Results divulged that the optimum methane yield and biomanure of 0.18 and 0.21 m CH/(kg VS reduced) and 3.15 and 2.8 kg/kg waste was obtained from FW at TS of 25% and 30% at an HRT of 41 and 31 days respectively whereas it was 0.32 and 0.43 m CH/(kg VS reduced) and 2.2 and 1.15 kg/kg waste from pretreated FW at an HRT of 16 and 20 days correspondingly. Improvement of methane from 62 to 81% was obtained due to thermal pretreatment. The highest nutrient recovery in terms of N, P, K was found to be 5.14, 2.6 and 3.2 respectively.

中文翻译:


餐厨垃圾和牛粪的干式厌氧共消化:总固体、基质比例和热预处理对生物粪肥甲烷产量和质量的影响



本研究的目的是评估 TS 浓度、底物混合比(共消化)和热预处理对通过食品干式厌氧消化 (DAD) 产生的沼气、甲烷产量、VS 减少 (%) 和生物粪便质量的影响废物(FW)和牛粪(CM)。结果表明,在 TS 为 25% 和 30%、HRT 为 41 和 31 天时,从 FW 中获得的最佳甲烷产量和生物肥料分别为 0.18 和 0.21 m CH/(kg VS 减少)和 3.15 和 2.8 kg/kg 废物。而在 16 天和 20 天的 HRT 下,预处理的 FW 的废物分别为 0.32 和 0.43 m CH/(kg VS 减少)和 2.2 和 1.15 kg/kg 废物。由于热预处理,甲烷含量从 62% 提高到 81%。氮、磷、钾的最高养分回收率分别为 5.14、2.6 和 3.2。
更新日期:2018-01-11
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