a process and plant for mechanical treatment of municipal refuse , including transformation and subsequent reuse of various directly or indirectly usable products . the process permits complete separation of the combustibles , vegetable matter , hard plastics , pvc , ferrous scrap and inert substances , and includes the following steps , starting from the receiving pit : tearing open the sacks containing the municipal refuse and thoroughly mixing the slime ; charging a treatment line wherein the combustible , vegetable matter , hard plastics , pvc and glass bottles fractions undergo primary separation ; collecting some of the separated products as directly usable products ; and routing the remainder of the separated products to lines for treatment of the various fractions contained therein .