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  • 1 National University of Life and Environmental Sciences of Ukraine, Ukraine
  • 2 Institute of Agricultural Engineering, Hungary
  • 3 Zhytomyr National Agroecological University, Ukraine
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In this paper, a new technical solution is introduced for the substrate mixing in a digester. The novelty content lies in the direction changes of the gravitational forces that influence the movement of organic and mineral biomass fractions. Digester case is designed as a horizontal cylinder rotating around a horizontal axis. Digester rotates in water that is in the outer casing.

This design creates a lift force for rotating digester which reduces the load on the bearings. The friction is reduced and therefore it reduces the energy loss of digester rotation and mixing of the substrate.

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