E-resources
Peer reviewed
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Koch, Konrad; Lippert, Thomas; Drewes, Jörg E.
Bioresource technology, 11/2017, Volume: 243Journal Article
•Three inocula have been tested systematically with four different substrates.•If inoculum’s origin impacts the performance in BMP test depend on the substrate.•Methane yield was not significantly influenced by the inoculum except for cellulose.•Degradation velocity was highest for the inoculum adapted to the substrate. The impact of the inoculum’s origin on the methane yield in Biochemical Methane Potential (BMP) tests was investigated. The three most commonly applied inocula were chosen, originating from (i) a digester of a wastewater treatment plant, (ii) an agricultural biogas plant treating manure and energy crops, and (iii) a biowaste treatment plant. The performance of each inoculum was tested with four different substrates, namely sewage sludge, dried whole crop maize, food waste, and microcrystalline cellulose as a typical reference material. The results revealed that the choice of inoculum had no significant impact on the specific methane yield of the tested substrates except for cellulose. Still, the specific methane production rate was significantly influenced by the choice of the inoculum especially for sewage sludge, but also for food waste and cellulose, whereas it became clear that an inoculum adapted to a substrate is beneficial for a speedy digestion.
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