For this project in Chernozemen, Bulgaria, HoSt built a biogas plant with a capacity of 1.5 MWe, mainly based on the input of liquid cow manure with co-products as silage corn and straw.

The 1,5 MWe biogas plant is built with a solid feeding system, a liquid input system consisting of a pump and cutter, 2 digester tanks in combination with an after-digester tank, a separator system, after-storage tanks and a building with a control and heating room, a 1.5 MWe CHP and a room for the operator.

Host has developed a digesting concept to create the possibility to digest large amounts of straw. A high efficiency is realized by applying 2-step digestion with an after-digester tank together with a high quality type of mixing.


Start construction Spring 2015
Start-up / commissioning Spring 2016


Capacity ± 50,000 tons / year
Input Mainly liquid cow manure, silage corn and straw
Solid feeding input
  • 80 m³ mixing/dosing bin with input screws
  • Straw input line with airlift to input screws
Digesters  2 x 2,714 m³
After-digester 1 x 2,714 m³
CHP 1 x 1,560 kWe


  • Possibility to digest large amounts of straw due to a special straw input line
  • Flexible plant, suitable for various input streams

More information

Do you want to receive more information about our biogas plants, want to learn more about our anaerobic digestion technology or do you want to know what HoSt can do for you? Don’t hesitate to contact us through or call us on +31 (0)53 – 460 90 80.