H Hydrotech™ Disc Filters Hydrotech™ mechanical and self-cleaning Disc filters provide reliable suspended solids removal for municipal effluent polishing and industrial water reuse. Filtration M MemGas™ The MemGas™ membrane technology is a proven state-of-the-art technology for biomethane production. It is based on the permeability and selectivity of the membrane in respect to different gases. Biogas and Odour Treatment