초록 ▼

A method for composting solid waste material wherein, in initial treatment stages an optimum particle size is developed at a comminution station. Following an initial air classification arrangement, heavy inorganic materials are segregated to the extent that aluminum, glass and paper characterized p

A method for composting solid waste material wherein, in initial treatment stages an optimum particle size is developed at a comminution station. Following an initial air classification arrangement, heavy inorganic materials are segregated to the extent that aluminum, glass and paper characterized products are removed for recycling purposes. A characterizing feature of the invention resides in the development of an optimized moisture content or digestible classified size optimized material at a relatively early stage prior to maceration developing a pulpous substance for digestion. A pug-mill arrangement is utilized for adding optimized moisture prior to digestion and maceration and a cage mill is utilized for the maceration stage of the process.

대표청구항 ▼

A process for treating solid waste comprising the steps of: receiving untreated waste composite starting material at a receiving station; comminuting said waste composite starting material to provide a composite size limited material having a select maximum average particle size; removing ferrous me

A process for treating solid waste comprising the steps of: receiving untreated waste composite starting material at a receiving station; comminuting said waste composite starting material to provide a composite size limited material having a select maximum average particle size; removing ferrous metal material from said composite, size limited material; then segregating, by air classification, heavy characterized inorganic material from said composite, size limited material, and simultaneously, segregating by air classification paper characterized material and plastic characterized organic material from said composite, size limited material; then elevating the moisture content of said segregated paper characterized material and said plastic characterized organic material; then segregating, by aspiration, said plastic characterized organic material from said paper characterized material; then drying said paper characterized material by the agitation thereof in the presence of heat and atmospheric air; agitating the organic components of said size limited material subsequent to said step of segregation by air classification and controlling the moisture content thereof by select moisture addition to provide a substantially uniform moisture distribution substantially throughout all portions of said material, said moisture content representing about 50 to 60% of the weight thereof said elevation of moisture content being carried out by agitating said size limited material over a residence interval selected to derive said uniform moisture distribution; macerating said size limited material without the further addition of moisture by subjecting it to counterrotative beating action to effect breakdown thereof subsequent to said step of agitation to derive a pulp characterized, moisture optimized material; and digesting and composting said pulp characterized, moisture optimized material by inducing the aerobic decomposition thereof.