In a full-scale agricultural biogas plant, the changes in process performance connected with the increasing energy crop addition were monitored. The substrates applied were pig manure, solid energy crops and agricultural residues. During the study, the organic loading rate and the volume-related biogas productivity were doubled to 4.2 kg VS/(m·3d) and 2.83 Nm3/(m3·d) respectively, by means of increasing the energy crop ratio in the feedstock to 96.5% (volatile solids). This resulted in an increase of the electrical capacity on a level twice as high as before. At the same time, methane yield and organic degradation rate decreased slightly to 0.35 Nm3/kg VSadded and 87.4%, respectively. The strongest impact observed was on the transfer of partly degraded organic material into the digestate storage and with this, an increase of the residual methane potential of the digestate. A maximum theoretical methane load in the digestate of 14.4% related to total methane production of the biogas plant was observed. This maximum level could be reduced to 5.5%.
Skip Nav Destination
Article navigation
Research Article|
November 01 2007
The impact of increasing energy crop addition on process performance and residual methane potential in anaerobic digestion
H. Lindorfer;
*Schaumann BioEnergy GmbH, An der Muehlenau 4, D-25421, Pinneberg, Germany (E-mail: harald.lindorfer@schaumann.bioenergy.eu)
Search for other works by this author on:
C. Pérez López;
C. Pérez López
**BOKU - University of Natural Resources and Applied Life Sciences, Vienna, Department for Agrobiotechnology, IFA-Tulln, Institute for Environmental Biotechnology, Konrad Lorenz Str. 20, A-3430, Tulln, Austria (E-mail: carmen.perez@boku.ac.at; christoph.resch@boku.ac.at; roland.kirchmayr@boku.ac.at)
Search for other works by this author on:
C. Resch;
C. Resch
**BOKU - University of Natural Resources and Applied Life Sciences, Vienna, Department for Agrobiotechnology, IFA-Tulln, Institute for Environmental Biotechnology, Konrad Lorenz Str. 20, A-3430, Tulln, Austria (E-mail: carmen.perez@boku.ac.at; christoph.resch@boku.ac.at; roland.kirchmayr@boku.ac.at)
Search for other works by this author on:
R. Braun;
R. Braun
**BOKU - University of Natural Resources and Applied Life Sciences, Vienna, Department for Agrobiotechnology, IFA-Tulln, Institute for Environmental Biotechnology, Konrad Lorenz Str. 20, A-3430, Tulln, Austria (E-mail: carmen.perez@boku.ac.at; christoph.resch@boku.ac.at; roland.kirchmayr@boku.ac.at)
Search for other works by this author on:
R. Kirchmayr
R. Kirchmayr
**BOKU - University of Natural Resources and Applied Life Sciences, Vienna, Department for Agrobiotechnology, IFA-Tulln, Institute for Environmental Biotechnology, Konrad Lorenz Str. 20, A-3430, Tulln, Austria (E-mail: carmen.perez@boku.ac.at; christoph.resch@boku.ac.at; roland.kirchmayr@boku.ac.at)
Search for other works by this author on:
Water Sci Technol (2007) 56 (10): 55–63.
Citation
H. Lindorfer, C. Pérez López, C. Resch, R. Braun, R. Kirchmayr; The impact of increasing energy crop addition on process performance and residual methane potential in anaerobic digestion. Water Sci Technol 1 November 2007; 56 (10): 55–63. doi: https://doi.org/10.2166/wst.2007.728
Download citation file:
Sign in
Don't already have an account? Register
Client Account
You could not be signed in. Please check your email address / username and password and try again.
Impact Factor 1.915
CiteScore 3.3 • Q2
13 days submission to first
decision
1,439,880 downloads in 2021