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Optimisation of biogas production from sugar beet pulp

Project Leader
Amon Thomas, Project Leader
Duration:
01.07.2006-19.04.2007
Type of Research
Applied Research
Staff
Amon Barbara, Sub Projectleader
Bauer Alexander, Project Staff
Kryvoruchko Vitaliy, Project Staff (bis 29.02.2008)
Machmüller Andrea, Project Staff (bis 30.06.2007)
Milovanovic Dejan, Project Staff (bis 30.06.2008)
BOKU Research Units
Division of Agricultural Engineering
Funded by
Agrana, Donau-City-Straße 9, A-1220 Wien, Austria
Abstract
During the processing of sugar beets, by-products as sugar beet pulp (SBP) and sugar beet tail (SBT) are coming out of production process. The SBP is coming out during the sugar extraction process whilst the SBT will be produced during cleaning and cutting sugar beet. Until now the most of them were used as an animal food, but unfortunately the consumption of such by-products as food fed to livestock is continuously reducing, that allows the usage of SBP and SBT for energy production through anaerobic digestion in biogas plants.

Aims of the research project:
To determinate a specific methane yield of sugar beet pulp (SBP) and sugar beet tail (SBT) in mono digestion.
To identify the most suitable mix of sugar beet by-products with a mixture composed of cattle manure, maize silage, sudan grass, clover grass.
To explore the influence of drying on specific methane yield of sugar beet pulp

Methods:
Substance and energy turnover during anaerobic digestion were measured in eudiometer batch experiments at 37.5 °C that was conducted according to DIN 38414/Teil 8 (1985) bzw. VDI 4630 (2006).

Results:
The results of the present experiments demonstrate that mesophilic fermentation of by-products from sugar beet processing with the aim of producing biogas is viable and sensible. The development of the cumulative specific methane yield showed that the micro organisms were not inhibited and were well adapted to the new substrates. In the present project, high values for the specific methane yield were achieved ranging between 430 and 480 lN kg-1 VS.
Supplementation of by-products to the mixture of energy crops and animal manure:
The supplementation of 70 % SBT to the mixture of energy crops and animal manure resulted in an increasing of specific methane yield of the mixture at 6%. The addition of 30% and 50% SBT to this mixture showed only a little increasing of specific methane yield at 1-2%. The added methane yield of the mixture was calculated as difference between calculated methane yield on the basis of methane yield of mono digested substrates and measured methane yield of the mixture. The additional methane yield could be a result of reciprocal complementation of used substrates.
The supplementation of SBP to the mixture of energy crops and animal manure produced no additional methane compared to calculated specific methane yield of the mixture, whereas the total methane yield of the mixture is rising.
Drying of by-products:
It was also demonstrated that drying of sugar beet pulp and sugar beet tail significantly reduced the achieved methane yield at 30 to 43 % respectively. A cause of the decreasing of specific methane yield could be an outgassing of volatile fatty acids from beet pulp and sugar beet tail silage during the drying process.
Keywords
biogas production; methane yield; optimisation of fermentation; pre-treatment; Sugar beet pulp;
Publications

** Kryvoruchko, V., Machmüller, A., Bodiroza, V., Amon, B., Amon, T. Anaerobic digestion of by-products of sugar beet and starch potato processing.

BIOMASS BIOENERG, 33 (4), 620-627; ISSN 0961-9534 WoS FullText FullText_BOKU

Hopfner-Sixt, K., Amon, T., Bauer, A., Kryvoruchko, V., Amon, B., Bodiroza, V., Ramusch, M., Hrbek, R., Friedel, J.K., Boxberger, J., Zollitsch, W. (2007): Möglichkeiten zur Verbesserung der Gasausbeute aus Gärrohstoffen .

FullText

* Hopfner-Sixt, K., Amon, T., Bodiroza, V., Kryvoruchko, V., Milovanovic, D., Zollitsch, W., Boxberger, J. (2006): Biogaserzeugung ausagrarischen Rohstoffen.

Landtechnik. Fachzeitschrift für Agrartechnik und ländliches Bauen, 3/2006, 148-149; ISSN 0023-8082

Amon, T., Pötsch, E., Amon, B., Kryvoruchko, V., Bodiroza, V., Zollitsch, W. (2006): Methane production from cereals, sun flower and maize: Optimisation of the methane yield per hectare through time of harvesting, variety and pre-treatment.
[28th International Exhibition-Congress in Chemical Engineering, Environmental Protection and Biotechnology ACHEMA 2006, Frankfurt am Main, Germany, 15.05.2006 - 19.05.2006]

In: Dechema e.V.: ACHEMA 2006, 28th International Exhibition-Congress in Chemical Engineering, Environmental Protection and Biotechnology, 15 – 19 May 2006, Frankfurt am Main / Germany,, 271

Hopfner-Sixt, K., Amon, T. (2006): Monitoring landwirtschaftlicher Biogasanlagen in Österreich – Durchmischungstechnik und Kennwerte wesentlicher Prozessparameter.
[15. Symposium Bioenergie 2006, Bad Staffelstein, Germany, 23.11.2006 - 24.11.2006]

In: Ostbayerisches Technologie-Transfer-Institut e.V. (OTTI) (Hrsg.): , pp 384 – 389 , 15.Symposium BIOENERGIE – Festbrennstoffe, Flüssigkraftstoffe, Biogas, 23./24. November , Kloster Banz, Bad Staffelstein

Amon, T., Kryvoruchko, V., Bodiroza, V., Amon, B. (2006): Das Methanbildungsvermögen und die Biogasqualität bei der Vergärung von Energiepflanzen.

Inform ¿ Zeitschrift für Pflanzenzüchtung und Saatgutproduktion (Linz), 2/2006, 13-15

Vorträge

Kryvoruchko, V., Machmüller, A., Bodiroza, V., Amon, B., Amon, T. (2007): The Use Of By-Products of Sugar Beet and Starch Potato Processing in Biogas Plants.

Proceedings of the 5th research and development conference of central- and Eastern European Institutes of Agricultural Engineering, 20-24.06.2007, Kiev

Amon, T., Amon B., Kryvoruchko V., Hopfner-Sixt K., Moser, A., Zollitsch, W. (2006): Biogas Forum Austria-Network of research, extension service, and commercial farms.. [Poster]

12th Ramiran International conference Technology for Recycling of Manure and Organic Residues in a Whole-Farm Perspective., 11 – 14 September 2006, Aarhus FullText

Hopfner-Sixt, K., Amon, T. (2006): Monitoring landwirtschaftlicher Biogasanlagen in Österreich – Durchmischungstechnik und Kennwerte wesentlicher Prozessparameter.

15.Symposium BIOENERGIE – Festbrennstoffe, Flüssigkraftstoffe, Biogas, 23./24. November , Kloster Banz, Bad Staffelstein

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