UNA DISPOSICION PARA EL TRATAMIENTO Y EVACUACION DE AGUAS RESIDUALES QUE CONTIENEN ARENAS.

摘要

Grit is removed from sewage sludge by recirculating digested sludge previously degritted at a forced rate into a cyclone separator together with grit containing sludge and discharging degritted sludge at cake consistency for disposal. The digester may be included in the degritting and recirculating system.