an official journal of: published by:
Editor in Chief: RAFFAELLO COSSU

FROM MECHANICAL BIOLOGICAL TREATMENT TO ANAEROBIC DIGESTION - CHALLENGES IN CHANGING PLANT OPERATING

  • Axel Zentner - Instute of Waste Management and Circular Economy , Technische Universitat Dresden Fachrichtung Wasserwesen , Germany

DOI 10.31025/2611-4135/2019.13783

Released under CC BY-NC-ND

Copyright: © 2018 CISA Publisher

Editorial History

  • Received: 30 Nov 2018
  • Revised: 17 Feb 2019
  • Accepted: 22 Feb 2019
  • Available online: 31 Mar 2019

Abstract

This paper presents the findings acquired in a study on the rearrangement of wet fermendation conditons in an anaerobic digestion (AD) process. As required by the federal law the rural districts “Elbe-Elster” and “Oberspreewald” (AEV) implemented a separate collection system for the organic fraction of municipal solid waste (oFMSW). Accordingly, the input material in AD of the mechanical biological treatment plant in Freienhufen (operated by AEV) is going to be separately collected oFMSW instead of residual waste. The plant operator intends to reduce the investment costs. Thus, the experiment has to refer to the existing plant regime. In order to facilitate the rearrangement on the operating process, the following objectives were investigated: (1) boosting AD by reducing the particle size; (2) recirculating process water to maximum extent to reduce waste water treatment costs; (3) describing the properties of oFMSW in the course of the seasons. Different variations in pre-treatment, AD and recirculation of process water were tested at lab-scale to the best possible course of action for the implementation in real life. The results show, that reducing the particle size has a minor impact; both on degradation efficiency and biogas production. A major impact on AD can be observed for the varying composition of oFMSW in the course of the seasons. Additionally, the recirculation of process water affects the efficiency of the AD by influencing the volumetric load. However, the recirculation ratio is limited by the ammonia concentration, since it might have an inhibiting effect on the microorganisms’.

Keywords


References

Adwiraah, H., (2015): Bioressourceninventur – Analyse von Stoffströmen zur Bestimmung urbaner Biomassepotenziale in einem Geoinformationssystem (GIS), Ingenieurgruppe RUK GmbH, Stuttgart

Aschmann, V., Effenberger, M., Gronauer, A., Kaiser, F., Kissel, R., Mitterleitner, H, Neser, S., Schlattmann, M. Speckmaier, A., Ziefreund, G. (2007): Grundlagen und Technik. (Buchverf). Bayerisches Landesamt für Umwelt (LfU). Biogashandbuch Bayern: Materialienband. Augsburg: s.n., p. 4-90

Dauber, S., (1993): Einfluβfaktoren auf die anaeroben biologischen Abbauvorgänge. (book auth.) B. Böhnke, W. Bischofsberger and C.F. Seyfried. Anaerobtechnik: Handbuch der anaeroben Behandlung von Abwasser und Schlamm. Berlin: Springer-Verlag

Hendriksen, H. V. and Ahring, B. K. (1991): Effects of ammonia on growth and morphology of thermophilic hydrogen-oxidizing methanogenic bacteria. FEMS Microbiology Ecology, Vol. 85, pp. 241-246

Roitsch, J. and Büscher, W., (2009): Charakterisierung und Optimierung von NawaRo-Biogasanlagen in typischen Ackerbauregionen in NRW. Landwirtschaftliche Fakultät der Universität Bonn, Schriftenreihe des Lehr- und Forschungsschwerpunktes USL, Nr. 160

Schropp, D., (1996): Anaerobe Vergärung von Reststoffen der lebensmittelproduzierenden Industrie, 2016, https://oparu.uni-ulm.de/xmlui/bitstream/handle/123456789/4304/Dissertation.pdf?sequence=1&isAllowed=y, website visited 13/09/2018

Schulz, H., Biogas Praxis. Staufen bei Freiburg: ökobuch Verlag, Staufen, p. 20

Wellinger, A., Baserga, U., Edelmann, W., Egger, K., Seiler, B. (1991): Biogas-Handbuch: Grundlagen-Planung-Betrieb landwirtschaftlicher Anlagen. Aarau: Wirtz, Bde. 2., extensively revised edition

Zentner, A. (2015): Entwicklung und Implementierung einer Methodik zur Erfassung der Grün-schnittpotenziale von Siedlungs- und Verkehrsflächen in kommunale Verwertungsstrukturen, dissertation, Beiträge zu Abfallwirtschaft/Altlasten, Forum für Abfallwirtschaft und Altlasten e.V. an der TU Dresden Außenstelle Pirna-Copitz (Vertrieb)


sep
30