The most common municipal solid waste (MSW) disposal method is sanitary landfill. The major disadvantage of this method is the production of highly contaminated leachate. Not only physicochemical but also biological methods are sufficient alone in order to remove organics from leachate to get high effluent quality. Integrated processes that use physicochemical and biological methods at the same time like membrane bioreactors (MBRs) have been mostly employed in landfill leachate treatment in last decade. In this study, the removal of organic material using aerobic/anoxic MBR system followed by a nanofiltration process was evaluated.
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The aim of the study was to verify the effectiveness of decrease of odour production during sludge stabilization with selected groups of microorganisms in conditions similar to those occurring on sludge storage pads. The experiments were carried out on a laboratory scale; the biopreparation EM-bio was used. It was found that in anaerobic conditions, biopreparation modified biochemical processes in a small degree and decreases the redox potential. Clear decrease of odour noxiousness of the wastewater sludge for samples with biopreparation was not observed. In the continuation of these studies sludge processing at higher redox potentials should be investigated.
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