METHOD FOR PRODUCING FODDER BASE OF HIGH PROTEIN AND ESSENCE AMINO ACID CONTENT FROM ACTIVATED SLUDGES ARISING FROM THE BIOLOGIC PURIFYING STAGE OF SEWAGE TREATMENT PLANTS

摘要

A high protein and essential amino acid contg fodder base is prepd from active sludges produced during biological stages of effluent treatment. These sludges are dewatered mechanically to 15-25% solids, treated and sterilised at 120-150 pref at 135 deg C and at 2-4.9 pref 3.2 bars pressure for 20-60 pref 30 mins. The treated material is pre-dried to contain 40-60 pref 50% solids and then dried finally to contain 90-95 pref 90% solids, at 0.3-1.0 pref 0.3 bars pressure.