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Research project (§ 26 & § 27)
Duration : 2019-12-01 - 2020-03-31

In the research project "Preparation of a guideline for the performance of residual waste sorting analyses", which was completed in 2017, a binding methodology was defined for the first time throughout Austria which fulfils waste management, technical waste and statistical criteria. The methods were developed by the Institute for Waste Management (Beigl et al., 2017). Based on these specifications, residual waste sorting analyses were carried out in all Austrian provinces in 2018/19. For the first time in Austria, a nationwide uniform database for the composition of municipal waste is now available, which allows exact comparisons according to collection systems as well as demographic and settlement structural regional characteristics. Previous waste analyses at state level were limited not only by a lack of standards and various questions, but above all by the low sample mass and thus by the low informative value of the results. The effectiveness of waste management collection system design and other measures was therefore often not possible. A nationwide campaign carried out makes it possible, on the basis of a much higher sample mass or number and the greater heterogeneity of the system design nationwide, to make much more precise statements as to whether, for example, certain collection systems are more efficient than others. Research objective Based on the uniform methodology developed by the Institute for Waste Management in 2017, the results of sorting analyses of all federal states - in terms of residual waste composition - are to be combined and evaluated at federal level for the first time in this research project. Up to now, sorting analyses have only been carried out and evaluated at the federal state level, with the result that comparability has only been possible to a limited extent due to the different methodological approaches adopted to date. Now for the first time nationwide uniform socio-economic factors as well as the influence of adhesions on packaging materials (gross/net packaging shares) are to be taken into account in the evaluation of the analysis results. The present research project thus makes an essential contribution to the provision of well-founded basic data on waste management for the planning of future measures and also enables the empirical evaluation of the methodology developed in 2017. Translated with (free version)
Research project (§ 26 & § 27)
Duration : 2019-12-01 - 2020-10-31

The amount of biogenic waste collected in Upper Austria is to be increased from the current 71,400 tonnes to 100,000 tonnes by 2021 through appropriate measures. For this purpose, the number of households connected to the biotonne collection is to be increased from currently 59% to 70%. On the one hand, the proportion of biogenic waste in residual waste is to be reduced as much as possible (Upper Austrian State Waste Management Plan 2017), and on the other hand the collection quantities for biological recycling are to be increased. Existing method regulations for the analysis of the biowaste composition, in particular those of the Bundesgütegemeinschaft Kompost e.V. for batch and area analysis (BGK, 2018a ; BGK, 2018b ), do not provide any indication of the accuracy of a fraction (e.g. impurities) with a certain sample mass (or number). Vice versa, the required sample mass cannot be determined with an accuracy to be maintained. On this basis, it is not possible to estimate the significance or uncertainties of e.g. biowaste analyses for the determination of impurities with e.g. sample masses of 50, 500 or 2000 kilograms. For operators of compost or biogas plants as well as for municipalities and other waste management actors, there is a need for uniform and - in terms of effort (especially number and mass of samples) and information gain (accuracy) - efficient analysis regulations. In the course of the project, a suitable methodology for the planning and implementation of impurity analyses in the biotonne collection is to be developed. Corresponding planning parameters such as the selection of the study area, the determination of the required sample mass and number as well as the sampling unit, the selection of the access level (collection container, collection vehicle) as well as the subdivision of the population into layers are to be evaluated by means of a pre-test. Based on the results, a guideline will be elaborated which will provide a sound, uniform basis for future biowaste analyses for users in the state and the district waste associations.
Research project (§ 26 & § 27)
Duration : 2019-10-01 - 2021-02-28

Currently, particularly with respect to the growing discussion on microplastics in the environment, the interest in biobased and biodegradable plastic is increasing in our society. This affects the waste management sector, too, not only regarding the issues of plastic collection and recycling or compost quality (microplstic in compost), but also with respect to biodegradable pre-collection bags for biogenic waste at the household level to increase the convenience for the citicens, and thus, the amount of separately collected biogenic waste. Within this project the acceptance of such biobased/biodegradable bags shall be inquired at the houshold level in selected regions of Lower Austria with questionairs together with students from agricultural vocational schools. Moreover, home-composting field trial with the currently used biobased/biodegradable pre-collection bags (promoted by the regional waste management associations) shall be deduced by the agricultural schools. The test framework, monitoring of the composting trials, design of questionairs and the final interpretation of the resualts will be done under the supervision of ABF-BOKU.

Supervised Theses and Dissertations