Title:
Batch and Semi-Continuous Anaerobic Co-Digestion of Autoctonous Microalgae and Pig Manure. Laboratory and Pilot Plant Experiments in Extremadura Region (Southwestern Spain)
Author(s):
Parralejo, A.I., Royano, L., González, J., González, J.F.
Document(s):
Paper
Abstract:
Anaerobic co-digestion of autochthonous microalgae and Scenedesmus sp. with pig manure was investigated under batch and semi-continuous conditions. Low volatile solid (VS) concentrations (1-3%) in batch experiments (microalgae methane potential) yielded higher methane productions than high VS concentrations (5-10%). Semi-continuous anaerobic digestion was inhibited with low OLR (2 kg VS m-3 d-1) when high volatile solid concentration was used, apparently because of elevated ammonia concentration in microalgae biomass and pig manure mixture in the reactor. The low C/N ratio of microalgae biomass, values about 6, suggests the possibility of using other substrates with higher C/N, as can be energy crops and agro-industrial wastes, enhancing process stability with higher organic load rates.
Keywords:
biogas, methane, microalgae, pilot plant, anaerobic co-digestion, pig manure
Topic:
Biomass Conversion Technologies for Heating, Cooling and Electricity
Subtopic:
Anaerobic digestion for biogas production
Event:
22nd European Biomass Conference and Exhibition
Session:
2CO.9.2
Pages:
502 - 505
ISBN:
978-88-89407-52-3
Paper DOI:
10.5071/22ndEUBCE2014-2CO.9.2
Price:
FREE
