for a sustainable and better future   



for a sustainable future.

for a sustainable future.

Biogas Technology PDF Print E-mail


Saigas is promoting biogas technology because it allows a clean waste recycling, the production of renewable energy and heat, and the production of a purified fertiliser (the digestate).

In this technological category, Saigas promotes a technology developed by Bioplex, proven and more efficient than the average for the following reasons:

1. Grit removal: Separation of heavy fragments and grit

Most materials treated by a digester contain grits, sand, gravel and other heavy particles, which has caused many expensive digester failures in the UK since 1980.

Grit and other inorganic heavy materials are either brought in with the feedstock or are formed within the digester vessels. With the patented process the removal of the heavy residues from the first stage is very easy, because the tank can be emptied every two to three days and be open for ventilation. No interruption of the digestion process is required!


2. Patented High Rate Process

In the first two process steps of the biogas production – hydrolysis and acidification – low pH values prevail. This has the biological acids which dissolve the molecular structures of celluloses and other such materials found in grass, straw and similar high fibre feedstocks. This pre-processing ensures greater efficiency of biogas production in the third stage.


3. Advanced Process Control

Unlike the traditional one-stage biogas plants whose performance is variable, the Bioplex Process can (optionally) control the biogas production down to a one hour period. This unique feature, developed for the use of bought in energy crops, can optimize energy production whilst preventing the waste of feedstock and biogas.


4. Solid materials as input material for the biogas plant

Horse stable and farm yard manure (FYM) was one of the first input materials to be used in the Bioplex biogas plants. Solid manure is rarely used in conventional digesters as it causes problems regarding mixing, grit/sand/stones accumulation and solid layers. Higher front-end temperatures ensure pathogen, parasite, weed seed and odour control.


5. Solid Fuel

The dewatering process can also remove much of the nutrients from the fibre, making it suitable as a solid fuel similar in calorific value as turf or soft wood.


6. Changes in Feedstock

The type of feedstock can be changed almost on a daily basis, as the first stage biology is robust.


7. Modular

Modular tanks can be moved and added to when needed.

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