Production of biogas from co-digestion of livestock and agricultural residues: A case study. Issue 9 (29th July 2017)

• Record Type: Journal Article
• Authors: Arhoun, Brahim; Gomez-Lahoz, Cesar; Abdala-Diaz, Roberto Teofilo; Rodriguez-Maroto, Jose Miguel; Garcia-Herruzo, Francisco; Vereda-Alonso, Carlos
• Is Part Of: Journal of environmental science and health. Volume 52:Issue 9(2017)
• Page Start: 856
• Page End: 861
• Publication Date: 2017-07-29
• Subjects: Farm wastes -- organic loading rate -- pig manure -- resource recovery -- strawberry residue -- waste valorization; Environmental engineering -- Periodicals; Environmental sciences -- Periodicals; Ecology -- periodicals; Hazardous Substances -- periodicals; 628
• DOI: 10.1080/10934529.2017.1312189
• Languages: English
• ISSNs: 1093-4529

Abstract

ABSTRACT: 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.