yhrtanks
https://www.yhrtanks.com/products/ground-mounted-biogas-holder/
YHR Tanks specializes in floating gas holders tailored for small-scale biogas production, especially suited for remote locations. The ground-mounted floating biogas holder is a storage system that is used to collect and store biogas produced from organic waste in a biogas plant. YHR Tank's floating gas holder digester is mounted on the ground and is designed to withstand the pressure of the gas produced.