By Himark BioGas International
Himark BioGas International has announced the issuance to it by the South African Patents Office of a patent that covers a grit removal system for anaerobic digester (AD) tanks. The system removes indigestible solids, including rocks, stones, sand, metal objects, or other indigestible organic or inorganic foreign objects settled on the tank floor during the production of methane-rich biogas for CNG, electricity, steam/heat production or natural gas pipeline injection.