The performance of the IBR has proven to be equal to and generally better than other anaerobic digester types in terms of volatile solids destruction and gas production, achieving these results in a quarter of the time of competitor systems.

KEY EVALUATION CRITERIA:	IBR PROCESS (Typical):	OTHER ANAEROBIC PROCESSES:	IBR ADVANTAGES:
Retention Time (Treatment Cycle)	5 days	20+ days	Reduction in Capital Costs, Smaller system footprint
Solids Reduction	50%+	30-50%	Higher Gas Production, Improved compost Quality
Gas Quality (% Methane)	> 70%	45-60%	Gas is Easier to Use
Gas Quality (H2S)	<800 ppm	1200+ ppm (typical)	Less Conditioning Needed
System Design	Pre-engineered Modular Scalable	Fixed Capacity Expansion requires site work	Lower startup costs, Expandable to meet Changing needs
Control System	Fully Automated	Variable levels of automation	Excellent system control, Superior Reliablity

Andigen's unique IBR (Induced Blanket Reactor) system combines low cost and high performance to make anaerobic digestion economically feasible and easy to operate. The installation and capital costs of the IBR Digester are offset within a short time period through fuel production and reductions in water and power consumption.

Over time, the IBR system can generate substantial additional revenue for the owner by selling power back into the electricity grid. Recycled water and heat further reduce operational costs, as does the potential for earning Carbon Credits or Tax Credits.

In addition, the gas quality is typically better with a methane content of > 70% and typical H2S content generally less than 800ppm. The higher rate of digestion allows less time for the other major component of biogas, CO2, to form. The IBR system is also compatible with co-digestion of animal manure with other organic waste streams.