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Open AccessArticle

The Influence of Pressure-Swing Conditioning Pre-Treatment of Cattle Manure on Methane Production

1
Biochemical Conversion, DBFZ Deutsches Biomasseforschungszentrum Gemeinnützige GmbH, Torgauer Straße 116, D-04347 Leipzig, Germany
2
Department Waste and Resource Management, University of Rostock, Justus-von-Liebig Weg 6, D-18057 Rostock, Germany
*
Author to whom correspondence should be addressed.
Bioengineering 2020, 7(1), 6; https://doi.org/10.3390/bioengineering7010006
Received: 30 October 2019 / Revised: 5 December 2019 / Accepted: 20 December 2019 / Published: 30 December 2019
(This article belongs to the Special Issue Current Advances in Anaerobic Digestion Technology)
Cattle manure is an agricultural residue, which could be used as source to produce methane in order to substitute fossil fuels. Nevertheless, in practice the handling of this slowly degradable substrate during anaerobic digestion is challenging. In this study, the influence of the pre-treatment of cattle manure with pressure-swing conditioning (PSC) on the methane production was investigated. Six variants of PSC (combinations of duration 5 min, 30 min, 60 min and temperature 160 °C, 190 °C) were examined with regards to methane yield in batch tests. PSC of cattle manure showed a significant increase up to 109% in the methane yield compared to the untreated sample. Kinetic calculations proved also an enhancement of the degradation speed. One PSC-variant (190 °C/30 min) and untreated cattle manure were chosen for comparative fermentation tests in continuously stirred tank reactors (CSTR) in lab-scale with duplicates. In the continuous test a biogas production of 428 mL/g volatile solids (VS) (54.2% methane) for untreated manure was observed and of 456 mL/g VS (53.7% methane) for PSC-cattle-manure (190 °C/30 min). Significant tests were conducted for methane yields of all fermentation tests. Furthermore, other parameters such as furfural were investigated and discussed. View Full-Text
Keywords: anaerobic digestion; cattle manure; steam explosion; pre-treatment anaerobic digestion; cattle manure; steam explosion; pre-treatment
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Schumacher, B.; Zerback, T.; Wedwitschka, H.; Weinrich, S.; Hofmann, J.; Nelles, M. The Influence of Pressure-Swing Conditioning Pre-Treatment of Cattle Manure on Methane Production. Bioengineering 2020, 7, 6.

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