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We have knowhow and IP pertaining to specific technologies that sit at the corner stone of our practical delivery of zero waste solutions.

Each technology is to ensure flexibility and capability for best fit into fully integrated feedback systems

Anaerobic Digestion (AD)

The Basics

The yield of biogas is related to the biological structure of the feedstock, which directly impacts the hydraulic retention time (HRT).

Typically, this is around 30 – 60 days.

The problem with HRT is that the longer it takes to digest, the larger the plant needs to be to hold the incoming waste. This creates not only cost issues, but mixing and energy issues.

IGS has the knowhow to significantly reduce HRT and increase biogas output for a given plant by at least twice the documented amounts. 

IGS reduces HRT from 60 days to 60 hours or less. This has significant impact on CAPEX and energy demand, as well as resulting in a more manageable and adaptable plant.

This is alone is a game changer – but we add much more…

IGS has the knowhow to increase the electrical output to upwards of 3.5kW per cubic meter of biogas.

Biogas is a mix of methane  and carbon dioxide – typically 60% methane.

Our knowhow can increase the methane percentage and ensure a stable energy output less dependent upon variations of input feedstock.

When the AD plant is set up to produce electricity as an output, a typical AD will convert biogas to electricity using IC gen sets. These are tough, robust, reliable and produce somewhere around 2kW per cubic meter of biogas. Our technology can increase this to at least 3.5kW per cubic meter of BioGas.

To combine just these two IGS  improvements, will improve the the bottom line economics by at least 350% better than a conventional AD plant. 

Most operators and researchers agree that if the bottom line economics of an AD plant could improve by just 50%, then they could stand alone without incentives and financial support.

We can convert questionable economics into very attractive bottom line profits.

IGS advanced AD (AAD) is not only scalable, and has been demonstrated in both small and large scale, but also directly benefits from the efficiency of design, operation and logistics, which permits exemplary investment efficiency, and delivers against multiple Sustainable Development Goals .


While there is concern about climate change, drying aquifers, air pollution, erosion of fertile land, it is worth reflecting on the fact that algae were responsible for converting the once very inhospitable toxic soup – that was planet earth – into the wonderful habitat that we are now slowly destroying. With perhaps a million-different species of algae, only a relative few have been thoroughly studied. But above all, they prove to be extremely efficient at converting what we do-not want, into what we do want.

Micro-algae are everywhere. We know of species that can produce fuel, food, animal feed and soil enhancements, as well as consume almost anything from solids in waste water through to plastic and even metals. Algae accomplish all this while absorbing carbon dioxide from the atmosphere at up to twenty times more rapidly than plants.

Allow algae to flourish on their own and the many different species will battle it out between themselves, rarely producing what we may commercially desire. However, create the right conditions for the micro algae species we want and this becomes fertile opportunity. These conditions are created in photobioreactors.

As a technology for a stand-alone plant, the economics rarely stack up. However, add IGS innovation and incorporate into an integrated system and the results are dramatically different!

Absorption chillers

An often-forgotten waste is low grade heat. To make practical use of low grade heat is most often an exercise in diminishing returns. However, IGS innovation can turn low grade heat into a valuable resource to produce as much as 50m3 of quality clean water in a steady flow from every generated MWh.

IGS integrates complete systems or we form additional pathways to revenue in existing plants. A tangible example is for example using IGS AAD, it becomes possible to input bio wastes and output electricity, clean water, liquid fuels and solid fertilisers.

It is common sense to produce water as a by-product of generating electricity. This leaves others to produce water by consuming electricity that has been generated!

Additionally, IP extends across the development and interaction of the following:

  • Dehumidifiers
  • Wind turbines
  • Photovoltaics
  • Thermoelectric Generators
  • Living machines
  • Condensation systems
  • Algae systems
  • Heat pumps and exchangers
  • Water turbines
  • and many more