Journal article
Thermal pretreatment of the solid fraction of manure: impact on the biogas reactor performance and microbial community
Water science and technology, Vol.53(8), pp.59-67
04/01/2006
Handle:
https://hdl.handle.net/2376/117446
PMID: 16784190
Abstract
Application of thermal treatment at 100–140 °C as a pretreatment method prior to anaerobic digestion of a mixture of cattle and swine manure was investigated. In a batch test, biogasification of manure with thermally pretreated solid fraction proceeded faster and resulted in the increase of methane yield. The performances of two thermophilic continuously stirred tank reactors (CSTR) treating manure with solid fraction pretreated for 40 minutes at 140 °C and non-treated manure were compared. The digester fed with the thermally pretreated manure had a higher methane productivity and an improved removal of the volatile solids (VS). The properties of microbial communities of both reactors were analysed. The specific methanogenic activity (SMA) test showed that both biomasses had significant activity towards hydrogen and formate, while the activity with the VFA – acetate, propionate and butyrate – was low. The kinetic parameters of the VFA conversion revealed a reduced affinity of the microbial community from the CSTR fed with thermally pre-treated manure for acetate, propionate and butyrate. The bacterial and archaeal populations identified by t-RLFP analysis of 16S rRNA genes were found to be identical in both systems. However, a change in the abundance of the species present was detected.
Metrics
6 Record Views
Details
- Title
- Thermal pretreatment of the solid fraction of manure: impact on the biogas reactor performance and microbial community
- Creators
- Z Mladenovska - The Environmental Microbiology and Biotechnology Research Group, BioCentrum-DTU, Building 227, Technical University of Denmark, 2800 Lyngby, DenmarkH Hartmann - The Environmental Microbiology and Biotechnology Research Group, BioCentrum-DTU, Building 227, Technical University of Denmark, 2800 Lyngby, DenmarkT Kvist - The Environmental Microbiology and Biotechnology Research Group, BioCentrum-DTU, Building 227, Technical University of Denmark, 2800 Lyngby, DenmarkM Sales-Cruz - Computer Aided Process-Product Engineering Center, Department of Chemical Engineering, Building 227, Technical University of Denmark, 2800 Lyngby, DenmarkR Gani - Computer Aided Process-Product Engineering Center, Department of Chemical Engineering, Building 227, Technical University of Denmark, 2800 Lyngby, DenmarkB.K Ahring - The Environmental Microbiology and Biotechnology Research Group, BioCentrum-DTU, Building 227, Technical University of Denmark, 2800 Lyngby, Denmark
- Publication Details
- Water science and technology, Vol.53(8), pp.59-67
- Academic Unit
- Chemical Engineering and Bioengineering, School of
- Identifiers
- 99900547933101842
- Language
- English
- Resource Type
- Journal article