FORFARANDE FOR BIOLOGISK RENING AV VETSKEFORMIGT AVFALL, VARVID TILLSETTES EXTRA-CELLULERA ENZYMER

摘要

An improved process for biological purification of liquid wastes is provided. The improvement is obtained by utilizing anaerobic bacteria in the presence of extra-cellular enzymes produced by Gram-positive bacteria and separated from said Gram-positive bacteria and the intra-cellular enzymes contained therein. As compared to the current technique the anaerobic process according to the invention may produce only 0.2% of sludge, while the retention time may be only 25% of the time currently used.