Patent EP-2420328-A1 (EP)
Inventor: SCHALK PETER DR
IPC: B03B9/06
Filed: 2011-08-02
Abstract: The method for treating an organic and/or water-containing material mixture (2) from waste products and/or biomasses, which are mechanically and/or biologically pre-treated, comprises feeding the material mixture to a first process stage (3), in which an intensive washing with partial percolation of the material mixture, an equalization and a continuous and/or discontinuous dosing are carried out in a second process stage (4) in a washing- and a dosing device (7) by using partially reused process water, and dehydrating the material mixture in the second process stage. The method for treating an organic and/or water-containing material mixture (2) from waste products and/or biomasses, which are mechanically and/or biologically pre-treated, comprises feeding the material mixture to a first process stage (3), in which an intensive washing with partial percolation of the material mixture, an equalization and a continuous and/or discontinuous dosing are carried out in a second process stage (4) in a washing- and a dosing device (7) by using partially reused process water, dehydrating the material mixture, which is treated in the first process stage, in the second process stage by using a mechanically active draining device (12), and separating the material mixture into a water path with further treatment stages for the process product water (11) and a solid path for the re-treatment of the washed and dehydrated residual material mixture through the first process stage and the second process stage. The water bath is fed from the first process stage and the second process stage directly with the process product water. The organic or water-containing material mixture is composed of waste products, which contain household- and municipal waste with green waste and/or with biomass and kitchen waste, food production waste, industrial waste and/or inherited waste from disposal sites. The organic or water-containing material mixture is composed of biomasses, which contain agricultural- and forestry biomasses. The dehydration of the material mixture takes place in the process stage by using the draining device and without previous washing in the first process stage. The washing process transfers the soluble organic and inorganic components from the material mixture into the process product water in the process stage using the washing- and dosing device by an intensive washing and under percolation of the process water. A continuous and/or discontinuous mixing and/or conversion of the material mixture take place in the first process stage through the washing- and dosing device. A mechanical process product water treatment takes place in the water path with the process product water for the separation of biologically not or heavily decomposable solids using a sieving- and separating device for coarse and fibrous material and/or using a sand trap. The process product water is treated in a biological and/or a chemical-physical process product water treatment. The process water from biological and/or chemical-physical process product water treatment is subjected to a heating process at 40-70[deg] C. The process water is partially or completely guided back again as process water to the first process stage. The material mixture is treated in the first and/or second process stages without mechanical pre-treatment. The material mixture is subjected to mechanical pre-treatment by decompacting, crushing, sieving and/or removing the valuable materials and impurities before the material mixture is treated in the first and/or second process stages. The material mixture is subjected to a biological pre-treatment e.g. composting or pre-fermenting and/or fermentation before the material mixture is treated in the first and/or second process stages. An INDEPENDENT CLAIM is included for a system for treating an organic and/or water-containing material mixture from waste products and/or biomasses.