Process for treatment and recycling of sludge by-product from milling olives in oil mill, comprises separation- extraction- pyrolysis or carbonization- gasifying combustion cycle

摘要

The process is new. The process of re-utilizing and eliminating of sludge produced as by-product during milling of olives in oil mills ensures recovery of all utilizable elements without introducing any chemicals and is based on combination of processes comprising separation- extraction- pyrolysis or carbonization- gasifying combustion sequence. The ligneous part of stone, present in sludge, is separated during separation stage, while pulps, already free of stone parts, are separated from oil during extraction stage. Carbonization of ligneous parts is conducted in furnace at 550 degrees C for 20 minutes. During gasifying stage, the product of carbonization is subjected, in presence of steam, to temperature 850-1000 degrees C, and gaseous effluents from carbonization are utilized for drying of oil-free pulp.