How To Improve Biogas Generation In The Food And Beverage Industry

Anaerobic wastewater treatment processes have been increasing in popularity across the food and beverage industry. Anaerobic processes effectively treat both the normal industrial wastes (higher concentration than municipal wastes) and the very high-strength/low-volume wastes generated by the industry. A welcome side benefit is the generation of biogas for energy production. A food and beverage company can save money, improve sustainability, and lower its carbon footprint. Other drivers include potential legislation in some states to reduce organic waste in landfills and the significant reduction in land application process viability.

Optimizing biogas generation from the anaerobic reactor is critical to maximizing energy production. This energy can be used in a variety of ways, including back in the production facility. It can also offset energy used in the further aerobic polishing of the wastewater after the anaerobic step. In the food and beverage industry, the anaerobic reactor often receives high-strength wastewater along with waste solids from the aerobic polishing step. Chemical oxygen demand (COD) values are often 2,500 mg/L or more. Any process always works better when well mixed — avoiding hot spots and fostering consistent and sustained biological reactions. Ensuring proper contact between the waste and the microorganisms leads to higher biogas production.