JWC International sewage grinders designed to minimise clogging, reduce bad smells, frozen screening management and protect process equipment in sewage treatment facilities. By a low speed and high torque capable of reducing wood, plastics, rocks, nuts, bolts, wire and sludge to manageable particle sizes, the grinders are available in in-channel and in-line versions. Through a small speed difference between both shafts, the space between the cutters, waste and fibres are automatically removed.