Machines for grinding and shredding solid materials in waste water, for removal of solid materials from waste water, and treatment of waste water, all sold as a unit; screening machine used to remove solids from wastewater flows; diverter and comminutor machines for collecting and grinding waste materials; wastewater and sewage equipment, namely, machines used for grinding, washing, compacting and de-watering wastewater, all sold as a unit; disposable waste comminuters; machines for the reduction of solids in waste water and solids capture, and for comminuting disposable waste; machines for the separation of solids from waste water; machines for the grinding, shredding, washing and compacting of solid materials; waste water treatment equipment, namely, disposable waste comminuters, grinders, shredders, washing machines and compactors for solid materials contained in waste water; machines for the reduction of solids in waste water and solids capture; machines for grinding, shredding, washing and compacting solid materials in waste water; in-line grinding machines for treating sludge