Evaluation of the biodegradability of organic waste by the means of impedance analysis

The biodegradability and consequently the stabilization degree of biologically treated waste is a required parameter to provide the evidence of the fulfillment for the German Waste Storage Ordinance (AbfAblV, 2002). The in appendix 2, AbfAblV recommended test procedures RA4 (Respiration Activity over 4 days) and GF21 (Gas Formation over 21 days) takes at least 4 or 21 days respectively. Moreover, despite uniform regulation, obtained analytical results show a strong dispersion of the values particularly with regard to different laboratories.
Within this work basics for a new microbiological approach, the impedance analysis, are examined for the evaluation of the biodegradability. A clear correlation resulted in the case of impedance measurement and biodegradability. In addition the impedance values can be converted with appropriate regression equations into the standard parameters RA4 and GF21. Hence, it seems suitable, that organic waste samples may be controlled within a day on their depositing ability according to AbfAblV or the efficiency of the biological treatment processes could be examined by impedance analysis.

Keywords:
Biodegradability, Composting, Municipal Solid Waste, Impedance, Microbial Population Dynamic, RA4, GF21. MBT

1 Introduction
2 Background
3 Research Objectives
4 Methodology
4.1 Treatment Process and Sampling
4.2 Selective Media and Incubations Conditions
5 Results and Discussion
5.1 Plate Count
5.2 Impedimetric Approach
6 Conclusions




Copyright: © Wasteconsult international
Source: Waste-to-Resources 2009 (Mai 2009)
Pages: 10
Price: € 5,00
Autor: Dipl.-Ing. Paul Stopp

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