Process for the simultaneous treatment of mechanically predewatered sewage sludge and dry biomass wastes and plant for performing the process

摘要

Process for the simultaneous treatment of mechanically predewatered sewage sludge containing preferably 20-25% DM and dry biomass wastes such as wastepaper or straw with coarse precomminution of the biomass, if necessary magnetic separation of iron pieces, intensive mixing of sewage sludge and biomass, pressing the mixture through a perforated matrix and drying the sausage-like pellets. In the plant for performing the process, for the precomminution of the biomass, the said biomass is periodically pressed against a slowly rotating comminution roller and the perforated matrix press used is a meat grinder or a similar screw press having a perforated matrix.