Physicochemical and microbiological monitoring of anaerobic digestion at laboratory and low cost tubular digester. (February 2019)

• Record Type: Journal Article
• Authors: Quintero, M.; Alzate, M.; Patiño, F.; Arboleda, A.; Pinzón, Y.; Mantilla, A.; Escalante, H.
• Is Part Of: Bioresource technology. Volume 274(2019)
• Page Start: 321
• Page End: 328
• Publication Date: 2019-02
• Subjects: Anaerobic digestion -- Most probable number -- Low-cost tubular digester -- Cattle manure -- Microbial communities; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2018.11.091
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Technological transference from laboratory scale to rural area in a developing country. Energy available as Biogas to replace traditional fuels in non-interconnected areas. Use of a low cost technique to estimate quantity and quality of microbial community in inoculum. Structure, dynamics and balance are indicators of microbial population behavior in inoculum. Abstract: The aim of this work was to use an inexpensive technique, such as the most probable number, MPN to quantitatively and qualitatively examine microbial groups in anaerobic digestion, AD of cattle manure, CM. Different diluents and mixing ratios were evaluated in 100 mL reactors using biomethane potential, BMP, as output variable. MPN tests were performed to samples from a 23 L tank and 6.5 m 3 low-cost tubular digester, LCTD. To monitor LCTD stability, volatile solids, VS, specific methanogenic activity, SMA, pH, volatile fatty acids, VFA, and chemical oxygen demand, COD were measured. Microbial characterization highlighted the optimal population essential to initiate the anaerobic digestion process. Bacteria domain were predominant over Archaea, with average abundance values of 78% and 22%, respectively. SMA of 0.0486 g COD g −1 SV d −1 was obtained at laboratory-scale and LCTD reached 83% of this value. Conditions selected are cost-effective to establish a biodigester in rural areas.