Abstract
Heavy metals play a very significant role in the performance and stability of biogas digesters, which are operated with organic fraction of municipal solid wastes or any other type of organic waste. For this reason this paper tries to evaluate the impact of heavy metals on biogas yield and quality. Anaerobic digestion of sewage sludge and rapeseed cake mixture has been carried out for 14 days. The obtained data show that the greatest negative impact on biogas production was made by zinc additive. Meanwhile, methane content in biogas varied from 64.5 to 70%. DOI: http://dx.doi.org/10.5755/j01.erem.62.4.2040
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