Anaerobic Digestion

Anaerobic Digestion

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 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 .