BIODESULFURIZATION OF HUNGARIAN LIGNITE AND SUB-BITUMINOUS COAL

The annual SO, emission is approx. 0.6 million tons in Hungary because of the high amount of sulphur in the power plant coals. Since Hungary has signed the European Environmental Agreement, the high sulphur emi ssion has to be gradually reduced. To overcome the acid rain problem, the biodesulphurization of Hungarian power plant coals has also been s tarted in Hungary. The R&D programe of biodesulphurization has been la unched in 1990. According to our findings the biodesulphurization proc ess is a suitable tool for reducing the pyritic sulphur content in lig nite and sub-bituminous coal.