The AD (anaerobic digester) technology developed by Bio4gas Express has a unique patented thermo-gas-lift (TGL) design that offers:  free biological mixing, free heating, desulphurization together with high volume gas production, within a single dual-chamber fermenter.  The system use as little as 3% of its own generated energy in comparison to 25 to 30% of the traditional  AD systems.

This results in a much smaller (small footprint) , singular and more cost effective fermenter that is integrate into a current process and facility.  The design and operations of the fermeter allows that a cocktail of available on site bio-waste can be used as a fuel for the fermenter and no specialised energy crops is required.  This obviously has a significant implication on the economics and feasibility of the bio-system. 

The systems fermenter sizes ranges from 200m3 up to 600m3, producing anything from 20kW up to 500kW electrical dependent on the energy content of the substrate.  Units can be combined in a modular configuration to offer flexibility in energy output and waste stream management. 

The one of a kind patented dual-chamber pressurised fermenter also allows for simplified filling through pumping and no screw feeding is required, ensuring problem- free feeding and substrate removal. Old fermented substrate is also removed from the fermenter as and when new substrate is added via the feed in pump system.

Once “charged” with the relevant biomass the system becomes a continuous process of addition and release of substrate and will produce methane gas that can be converted in electricity and heat.  The  “waste” left after the 30-40 day of fermentation is a “nutrient rich bio-fertilizer”. The overall higher quality fertilizer produced has less smell and lower dry substance content ensuring more even spread of the fertiliser, thus improving absorption.

The system can work with any biomass making it great for small rural communities, commercial plant that produce bio-waste and agricultural applications like piggeries, dairies, abattoirs and any other process that generates a constant supply of ABP (animal by-products) or bio-wastes, like waste food and green cuttings.  

Differences between Bio4Gas Express Technology and conventional AD Technology :

Waste to energy conversion

Alternative Technology

◦ Technology developed over 40 years by University of Innesbruck Austria
◦ Patented Thermo-gas-Lift Technology that offers
◦ Can handle cocktail/ selection on/ of on-site waste streams
◦ Require small quantities of bio-waste (2,5m3 upwards)
◦ Scalable system (100m2 up to 3000m2)
◦ Low tech (no moving part inside bio-reactor)
◦ Single feed in & out system
◦ Completely automated via PLC driven system

Thermo-Gas-Lift Technology

◦ Singular dual chamber Bio-reactor
◦ Singular in & out feeding system
◦ Biological-mixing & heating
◦ No moving parts via gas pressure & heat differential
◦ Stable and controllable bio-reactor environment
◦ AD reactor

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