Satpathy, Preseela and Steinigeweg, Sven and Siefert, Eike and Cypionka, Heribert (2017) Effect of lactate and starter inoculum on biogas production from fresh maize and maize silage. Advances in microbiology, 7 (5). pp. 358-376. ISSN 2165-3402

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Abstract

Lactate is a key intermediate during anaerobic digestion of carbohydrates; however, it fails to receive significant consideration in biogas plants. We examined the influence of lactic acid on biogas production. Two commonly used feeds, fresh maize and maize silage, were selected as substrates due to their difference in lactic acid contents. Additionally, inocula from an agriculture-based biogas plant, a waste water treatment plant and a standardised laboratory reactor were selected to investigate the impact of starter culture on the process. Experiments demonstrated increased total biogas yield of up to 45% in the lactate-rich maize silage over the lactate-devoid fresh maize, but only in cases where the starting inocula had been previously exposed to lactic acid. Our findings suggest lactic acid is a significant intermediate in biogas production and merits consideration. Additionally, the ability of the starter inoculum to utilize lactic acid is an important factor in process optimization and enhanced biogas production.

Item Type:	Article
Additional Information:	Publiziert mit Hilfe des DFG-geförderten Open Access-Publikationsfonds der Carl von Ossietzky Universität Oldenburg.
Uncontrolled Keywords:	Biogas, Lactic Acid, Maize, Silage, Starter Inoculum
Subjects:	Science and mathematics > Chemistry Science and mathematics > Life sciences, biology
Divisions:	Faculty of Mathematics and Science > Institute for Chemistry and Biology of the Marine Environment (ICBM)
Date Deposited:	27 Sep 2017 11:27
Last Modified:	03 Nov 2017 12:11
URI:	https://oops.uni-oldenburg.de/id/eprint/3335
URN:	urn:nbn:de:gbv:715-oops-34162
DOI:	10.4236/aim.2017.75030
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