Regenerative Energie

Biogas

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Biogas from fruit and vegetable waste in a decentral process

Biomass with relatively high water content and low lignocellulose fibers, such as fruit and vegetable waste, is suitable for anaerobic treatment to produce biogas. In a pilot plant nearby a wholesale market where the fruit and vegetable waste are generated this biogas process is investigated in a decentral biogas plant.

A modular two-stage process with two 3.2 m³ fermenters has been constructed. Thereby the variability in quantity and composition of substrate input is one of the challenges for the operation of such biogas plants. Single substrate charges were crushed and stored in different tanks before they were mixed together in an additional tank to balance the variability in composition. These mixed substrates were then fermented to biogas in a two-stage high-load digester with integrated membrane filtration. Objectives are the development of efficient and suitable small-scale biogas plants which achieve these requirements as well as closing the loops of ma terials by utilizing all mass flows in the process. A fully automated system operation with an "intelligent control system" is one of the aims of the project, because an intelligent substrate management is part of a successful biogas process. Results of the decentral pilot scale biogas plant will be presented. With a hydraulic retention time of 9 - 11 days a degradation level of 90-95% has been achieved with fruit and vegetable waste in the research plant.

Project funded by BMBF

Copyright:	© European Compost Network ECN e.V.
Quelle:	Orbit 2014 (Juni 2014)
Seiten:	0
Preis:	€ 0,00
Autor:	Dr. Brigitte Kempter-Regel S. Görner Dr.-Ing. Ursula Schließmann
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