Adaption of a German MBT Process to the Boundary Conditions of Newly Industrialized Countries - Results of a pilot plant operated in Thailand

A mechanical biological treatment (MBT) process for municipal solid waste (MSW), suitable for the boundary conditions of newly industrialized countries (NIC), was developed and tested in Thailand. The main purpose was to make the process simple, robust and economic. The process focuses on the production of refuse-derived fuel (RDF) and a high biogas yield. The so-called BIOBUNK pilot plant consists of a shredder as mechanical stage and an aerobic mixed reactor as biological stage.

The plant was operated with a daily MSW capacity of 2-2.5 Mg. An average retention time in the BIOBUNK reactor of less then 1.4 days was achieved. Biological self-drying tests of the solid output material operated with a high performance. Within seven days, a dry mass content of up to 86 % could be reached. The process produced around 400 kg RDF per Mg of input. The lower calorific value of this RDF ranges from 14-16 MJ/kg with a chlorine concentration clearly below 0.5 %. Thus, it presents an optimal alternative fuel, e.g. for the cement industry. The produced waste water has a chemical oxygen demand (COD) of 30,000 mg/L with a sufficient content of the nutrients nitrogen and phosphate. The biogas potential is estimated up to 40-50 Nm³ per Mg of input.

Copyright: © Wasteconsult International
Quelle: Waste-to-Resource 2011 (Mai 2011)
Seiten: 16
Preis inkl. MwSt.: € 8,00
Autor: Sebastian Platz
Dr.-Ing. Uwe Menzel
Dipl.-Ing. Martin Schaub
Dr. Jochen Amrehn

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