Biogas production using dry fermentation technology through co-digestion of manure and agricultural wastes
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Biogas production using dry fermentation technology through co‑digestion of manure and agricultural wastes Essam M. Abdelsalam1 · Mohamed Samer2 · Mariam A. Amer3 · Baher M. A. Amer2 Received: 21 January 2020 / Accepted: 15 September 2020 © Springer Nature B.V. 2020
Abstract Recently, dry anaerobic co-digestion is one of the mechanisms which have been increasingly used to improve the reactor’s performance for treating livestock manure with agricultural crop residues. Due to carbohydrate, protein and lipid existing in agricultural wastes, biogas yield decreased with higher reactor volume when using wet anaerobic digestion. In this regard, the aim of this work was to achieve the production of biogas using the dry anaerobic technology through livestock manure co-digestion with agricultural waste (AW) such as potato peels, lettuce leaves and peas peels. The manure and AW were mixed at a ratio of 2:1 for 15 min before being introduced into the batch anaerobic system. The results indicated that the co-digestion of lettuce leaves and manure yielded the highest production of methane and biogas which were 6610.2 and 12756.7 ml, respectively, compared to the control (manure) that yielded 4689.9 ml and 11606.7 ml, respectively. Additionally, the results indicated that the co-digestion of lettuce leaves and manure yielded the highest specific production of methane and biogas which were 405.5 ml C H4 g−1 VS and −1 782.6 ml biogas g VS, respectively, compared to the mono-digestion of manure (control) that yielded 328 ml C H4 g−1 VS and 633 ml biogas g −1 VS, respectively. Eventually, dry anaerobic co-digestion process is an effective approach to waste treatment. Keywords Dry fermentation · Biogas · Co-digestion production · Crop residues · Livestock manure
1 Introduction The production of agricultural wastes is anticipated to increase by 44% from 2005 to 2025 in the coming years, particularly in developing countries. Accordingly, these countries dispose the agricultural wastes by landfills or incineration. Consequently, it is required to improve or upgrade techniques that specify convenient handling of these bio-wastes * Essam M. Abdelsalam [email protected] * Mohamed Samer [email protected] Extended author information available on the last page of the article
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(Melikoglu et al. 2013; Capson-Tojo et al. 2017). The agricultural wastes emission 3 Gt CO2 equivalents of greenhouse gases (GHGs) that reported by the Food and Agriculture Organization (FAO) of the United Nations estimated 750 billion US dollars. Subsequently, wastes represent one of the greatest opportunities to produce renewable fuels (FAO 2013; Eriksson et al. 2017; Tayyab et al. 2019). In the European agricultural sector, animal manure and agro-industrial wastes are mainly released in liquid form, and continuous wet anaerobic digestion in continuous stirred tank reactor (CSTR) reactors is the dominant technology. Alternately, in the MENA region, wastes are often generated in solid for
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