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Production of biogas from co-digestion of livestock and agricultural residues: A case study
This study was undertaken to determine the possible changes in the digester yield and performance for the anaerobic co-digestion under mesophilic conditions of strawberry residues (SRs) together with pig manure (PM). The first part of this paper deals with the digestion of SR as a single substrate. For organic loading rates (OLRs) of 4.4 (g L −1 d −1 ) or less, the experimental specific biogas and methane productions are 0.588 and 0.231 L g −1 , respectively. When higher OLRs (5.5 g L −1 d −1 ) are used the digester fails due to acidification. In the second part, the co-digestion of both residues is explored using a wide variety of SR:PM ratios and OLRs of 5.5 g L −1 d −1 with good stability. Therefore, it is demonstrated that co-digestion allows the improvement of the treatment capacity as compared with SR as a single residue. The methane and biogas productions increase as the SR:PM ratio increases. It may be concluded that, when a digester works with a certain OLR, the performance for co-digestion is always better than for single substrates because the presence of PM provides a better stability and the presence of SR improves the biogas and methane production.
Production of biogas from co-digestion of livestock and agricultural residues: A case study
This study was undertaken to determine the possible changes in the digester yield and performance for the anaerobic co-digestion under mesophilic conditions of strawberry residues (SRs) together with pig manure (PM). The first part of this paper deals with the digestion of SR as a single substrate. For organic loading rates (OLRs) of 4.4 (g L −1 d −1 ) or less, the experimental specific biogas and methane productions are 0.588 and 0.231 L g −1 , respectively. When higher OLRs (5.5 g L −1 d −1 ) are used the digester fails due to acidification. In the second part, the co-digestion of both residues is explored using a wide variety of SR:PM ratios and OLRs of 5.5 g L −1 d −1 with good stability. Therefore, it is demonstrated that co-digestion allows the improvement of the treatment capacity as compared with SR as a single residue. The methane and biogas productions increase as the SR:PM ratio increases. It may be concluded that, when a digester works with a certain OLR, the performance for co-digestion is always better than for single substrates because the presence of PM provides a better stability and the presence of SR improves the biogas and methane production.
Production of biogas from co-digestion of livestock and agricultural residues: A case study
2017
Article (Journal)
English
USA , Recht , Zeitschrift , Datenverarbeitung
Production of biogas from co-digestion of livestock and agricultural residues: A case study
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