Patent ID: 6036862
Filing Date: 2000-03-14
Classification: C02F,Y02W

Abstract:
An aerobic thermophilic process for treating waste comprising:injecting waste material into a reactor vessel having thermophilic microorganism to form a volume of bulk liquid in the reactor vessel;injecting an oxygen-containing gas into the reactor vessel in such manner as to transfer oxygen into the reactor bulk liquid for utilization by the thermophilic microorganisms in aerobic treatment of the waste material;monitoring the oxidation-reduction potential and temperature of the reactor bulk liquid;monitoring the concentration of volatile fatty acids and sulfides in the reactor bulk liquid; andadjusting at least a selected one of the rate of injection of the oxygen-containing gas, the oxygen-transfer efficiency of the oxygen-containing gas and the volume of bulk liquid in the reactor in response to the concentration of volatile fatty acids, concentration of sulfides, oxidation-reduction potential and temperature of the reactor bulk liquid to maintain the temperature of the reactor bulk liquid within a predetermined range.