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Characteristics of Fouling Deposits on Membranes of a Membrane Bioreactor
Original title: ОСОБЛИВОСТІ СКЛАДУ НАЛИПАНЬ НА МЕМБРАНАХ МЕМБРАННОГО БІОЛОГІЧНОГО РЕАКТОРА
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This study analyzed the composition and structure of fouling deposits on membranes in an industrial membrane biological reactor (MBR). Results found high ash content (62.2%) dominated by calcium compounds and a significant quantity of microplastics in the adhesion layers, with practical operational recommendations developed.
The article presents the results of a complex study of the composition and structure of adhesions on membranes in an industrial membrane biological reactor (MBR). The purpose of the work is to determine the main components of adhesions on the membranes of an operating membrane reactor in order to reduce the activity of their formation. Membrane resistance, which is caused mainly by sediment (cake) resistance during MBR operation, is the most important parameter for the effective operation of the installation. Methods of researching adhesions and wastewater in MBR – chemical, microscopic with processing of microphotographs in the ImageJ, software product, separation of plastic particles by flotation. A very high ash content - 62.2% - was found in the adhesions on the membranes. Among the ash elements, calcium compounds were extremely predominant. It was established that the mobility of magnesium cations in adhesions is significantly higher than the mobility of calcium cations. Directly on the membrane, smaller flakes prevail than on the surface of the adhesions, their oxidizing capacity was very low. A large amount of microplastics was found in the adhesions. Based on the results of the research, practical recommendations for the operation of the studied MBR were developed.
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