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The RrRU-BMW project - 134 weeks pilot source separation of bioorganic municipal waste in Shenyang, China

Source separation in BMW (Bioorganic Municipal Waste) and in RMW (Remaining Municipal Waste) and the collection of those fractions were introduced in 4 pilot areas in 2 districts of Shenyang. The results for the first year of the project have been reported (ORBIT 2006). In two of the areas the project activities continued for another two years.

Further results relate to the pilot areas (Beifang Yuan and Quan Yuan) after 134 weeks are presented and discussed. The waste collection data analysis considers, on one hand, the overall results from all households in each of the pilot areas (under the aspect that we are conducting an ‘island mode’ project which is not supported by an overall governmental policy) and, on the other hand, the ‘10 best households’ to better identify real trends and quantities. The results show, an average quantities per capita and week for the best households in the second period amounting to 1.79 kg/c.w for BMW, 0.37 kg/c.w for RMW, totalising a 2.16 kg/c.w for MSW. The ratio of 83% BMW and 17% RMW in the total MSW generated remained constant compared to first year. The decrease of the BMW generation during the winter season due to lower access to fresh vegetables/fruits also remains. The results for the average waste stream composition over the total project period (69 analysis for MSW and 57 for RMW) confirms the previous results of the waste stream characterized by having a high bioorganic fraction of about 77 % (including fine fractions, mainly food leftovers). The amount of valuable recyclables (paper 7.5%, plastic 5.1 % , glass 1.6% metal 0.3%) in the MSW is still relatively small, since a great part of these secondary materials are collected and sold by the households before being disposed. The overall participation rate for the two pilot areas was 60% in the first year, stabilizing at 50% over the following period. Ballast matter (non bioorganic waste in the BMW stream) amount slightly increased when compared to the first year, reaching an average of 6.2%, which can be still considered within the limits for a proper BMW utilization, such as biogas and organic fertilizer production.

Copyright:	© European Compost Network ECN e.V.
Quelle:	Orbit 2008 (Oktober 2008)
Seiten:	11
Preis:	€ 11,00
Autor:	L.F. Maia Prof. Dr. habil. Bernhard Raninger Prof. Dr. Ing. habil. Werner Bidlingmaier L. Feng X. Luo
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