The system had two components: (1) an on-farm waste. water treatment system ( Vanotti et AL., 2006b ) consisting of liquid-solid separation using flocculants and screens, treat-. ment of the separated liquid using aerobic biological N. removal, and chemical disinfection and soluble P removal. using lime, and (2) a centralized solids processing facility. where separated manure solids were combined with cotton. gin residue and aerobically composted to reduce the wastes. into stable humus used to manufacture peat substitutes. used in potting soil, soil amendments, and organic fertiliz-