EFFECT OF DISINFECTION OF SUBSTRATES OF ANAEROBIC BIOREACTOROS IN VORTEX LAYER APPARATUS
Abstract
Preliminary treatment of organic waste before its treatment in bioreactors promotes intensification of anaerobic bioconversion of organic waste which is classified as a renewable energy source. The results of studying influence of treating substrates of anaerobic bioreactors in vortex layer apparatus (VLA) on viability of microorganisms living in the substrates, are presented. Microscopy study shows no free-floating viable protozoa in the active sludge after VLA treatment for two minutes. The fact of grinding flakes of activated sludge from the substrates of anaerobic bioreactors is confirmed. It is found that a long-term VLA processing (300 s) leads to more intensive destroying flakes of the activated sludge as compared to a short-term treatment (37.5 s). At the same time, the viability of microorganisms, including methanogens, is maintained, with the exception of the protozoa, which is important for their subsequent use in biological conversion of biomass resulting in obtaining biogas and high-quality fertilizers. It has been shown that the VLA treatment contributed to the improvement of the mass exchange between microorganisms and a nutrient medium due to the fine grinding of the substrate (up to 50-100 µm).
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Copyright (c) 2019 D. A. Kovalev, A. A. Kovalev, I. V. Katraeva, Yu. V. Litti, and A. N. Nozhevnikova
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