A frontal loader delivers substrates into the hopper where they are crushed and fed to the horizontal auger.
Supply of substrates
Substrates are transported by means of a horizontal auger to the biomix pump. Here, the substrates are mixed with the biomass from the reactor and pumped back into the reactor.
Biomass inside the reactor is pumped to the external heat exchanger and returned to the reactor. No pipes on reactor walls
Substrates are constantly mixed by the central roof mixer.
Anaerobic bacteria digest the substrates, producing biogas.
Biogas is collected and stored in a gasholder on top of the post-digestor or in an external gasholder.
Biogas is dried in a chiller, pressurized by a gas compressor. Sulfur is removed by means of an activated charcoal filter. The purified biogas is pumped for combustion
The distinctive features of this biogas technology are a biogas reactor with a height greater than the diameter and a central dome mixer. This design provides the best heat and mass transfer. Another positive feature is lower electric energy consumption for stirring.
The substrate is heated in an external spiral heat exchanger. Heat consumption is 2-3 times less compared with a CSTR biogas reactor where heating is by pipes on the reactor’s walls. The mixer creates a vortex flow, raising the substrate at the walls of the reactor up and lowering it in the center of the reactor. The effective mixing allows more complete fermentation and increased biogas yields.
Vertical biogas reactors are particularly suitable for food industries.
Firstly, vertical reactors take up less space compared to the classical horizontal ones. This is especially important for food industry enterprises, which are usually located in cities and have minimal free space.
Secondly, unlike enterprises in rural areas, industrial enterprises have full-time technical specialists capable of servicing complex but more efficient plants.
- the reactor height is greater than the diameter
- central dome mixer
- heating using an external heat exchanger
- Organic load 2-5 kg / m3 of reactor per day
- Dry matter inside of the reactor 4-10%