Sekundärbrennstoff auf Basis von verrottetem Abfall

摘要

The invention concerns a secondary fuel which is characterized in that it comprises a predominantly organic mass which is rich in crude fibres, inert with respect to biological reactions and low in pollutants and obtained from waste which contains organic material. This mass is obtained in that: a) the waste which contains organic material is fed without previous fermentation treatement to a single or multi-chamber rotting device; b) this material is subjected for a maximum of 100 hours to an intensive aerobic rotting process in the ambient and process conditions conventional therefor (optionally with the addition of air and preferably at a temperatue of 50 to 70 DEG C, a degree of moisture of 50 +/- 5 %, in a slightly acidic state (pH less than 7) and with a C-N ratio of 30-40:1); c) this material is optionally subjected for a maximum of 350 hours to a closed aerobic secondary rotting process in the conditions conventional therefor (optionally with the addition of air and preferably at a temperature of 35 to 55 DEG C, a degree of moisture of 40 +/- 5 %, in a slightly acidic state and with a C-N ratio of 30-40:1); d) further rotting is substantially prevented by lowering the degree of moisture in the rotting device or during the secondary rotting process to less than 40 %, such that the resultant, predominantly organic mass is dried to a dry substance content of 60 % or more.