title: Effect of moisture of municipal biowaste on start-up and efficiency of mesophilic and thermophilic dry anaerobic digestion.
abstract: Methane production from biowaste with 20-30% dry matter (DM) by box-type dry anaerobic digestion and contributing bacteria were determined for incubation at 20, 37 and 55 °C. The same digestion efficiency as for wet anaerobic digestion of biowaste was obtained for dry anaerobic digestion with 20% DM content at 20, 37 and 55 °C and with 25% DM content at 37 and 55 °C. No or only little methane was produced in dry anaerobic reactors with 30% DM at 20, 37 or 55 °C. Population densities in the 20-30% DM-containing biowaste reactors were similar although in mesophilic and thermophilic biowaste reactors with 30% DM content significantly less but phylogenetically more diverse archaea existed. Biogas production in the 20% and 25% DM assays was catalyzed by Methanosarcinales and Methanomicrobiales. In all assays Pelotomaculum and Syntrophobacter species were dominant propionate degraders.
authors.affiliation: Institute of Biology for Engineers and Biotechnology of Wastewater, Karlsruhe Institute of Technology KIT, Am Fasanengarten, D-76128 Karlsruhe, Germany. Electronic address: Chaoran.Li3@kit.edu.
authors.forename: Chaoran
authors.initials: C
authors.lastname: Li
authors.affiliation: Institute of Biology for Engineers and Biotechnology of Wastewater, Karlsruhe Institute of Technology KIT, Am Fasanengarten, D-76128 Karlsruhe, Germany. Electronic address: Christoph.Moertelmaier@kit.edu.
authors.forename: Christoph
authors.initials: C
authors.lastname: Mörtelmaier
authors.affiliation: Institute of Biology for Engineers and Biotechnology of Wastewater, Karlsruhe Institute of Technology KIT, Am Fasanengarten, D-76128 Karlsruhe, Germany. Electronic address: Josef.Winter@kit.edu.
authors.forename: Josef
authors.initials: J
authors.lastname: Winter
authors.affiliation: Institute of Biology for Engineers and Biotechnology of Wastewater, Karlsruhe Institute of Technology KIT, Am Fasanengarten, D-76128 Karlsruhe, Germany; University of Applied Science, Hochschule Emden Leer, Faculty of Technology, Microbiology - Biotechnology, Constantia Platz 4, D-26723 Emden, Germany. Electronic address: Claudia.gallert@hs-emden-leer.de.
authors.forename: Claudia
authors.initials: C
authors.lastname: Gallert
mesh_terms: D000693:Anaerobiosis; D001419:Bacteria / Q000378:metabolism*; D001673:Biodegradation, Environmental; D056804:Biofuels; D019149:Bioreactors / Q000382:microbiology; D002947:Cities; D005232:Fatty Acids, Volatile / Q000032:analysis; D006813:Humidity; D006863:Hydrogen-Ion Concentration; D017404:In Situ Hybridization, Fluorescence; D008697:Methane; D012037:Refuse Disposal / Q000379:methods*; D013696:Temperature; D014866:Waste Products
chemical_list: D056804:Biofuels; D005232:Fatty Acids, Volatile; D014866:Waste Products; D008697:Methane
keywords: Biogas production; Dry anaerobic digestion; Microbial population; Volatile fatty acid degradation; Water activity