Water is often used in processing of foods, beverages and ethanol made from agricultural crops. The waste water from the process is collected and treated as effluent in a digester plant. The anaerobic digestion of the effluent creates a biogas that consists of varying amounts of methane and CO2. The methane can be collected for consumption in a gas generator set to create electricity while emission credits.
• food / beverage processing industries;
• chemical processing industry and other heat intensive application.
The food-processing industry is in a unique position to use its own waste products to generate renewable energy, thereby reducing processing costs, achieving environmental benefits, and creating a hedge against rising energy costs.
The quality of feedstock in terms of its gas yield will partly depend on its freshness: the fresher it is the higher the gas yield will be and less danger there is of it becoming acidic. An acidic feedstock may inhibit or even kill the bacteria in the digester. ideally, the pH range in the digester should be 6.8 - 8.
Besides that, digestion systems will greatly reduce pathogenic organisms and bacteria, but aren't likely to totally eliminate pathogens in the feedstock. Additional heat treatment may be necessary to ensure complete elimination of pathogens.
The product range for Cat gas gensets, using industrial biogas is of 50 - 4300 kW.