Patent ID: 6203702
Filing Date: 2001-03-20
Classification: C02F,Y02W,Y10S

Abstract:
A biodegradable waste treatment system, comprising:a source of biodegradable waste producing an average daily biodegradable mass m, the biodegradable mass being entrained in a wastewater stream having an average daily volume w;at least one treatment cell for receiving said wastewater stream, said treatment cell having an aerobic treatment zone;an aerator disposed in the treatment cell at a bottom margin of the aerobic treatment zone, for introducing air to the aerobic treatment zone;a blower supplying compressed air to the aerator, the blower and the aerator providing, when the transfer efficiency of the treatment cell is taken into account, a daily amount of oxygen of at least 3 m to the wastewater in the aerobic zone;an interruptible energy source coupled to the blower, the energy source being interrupted according to a predetermined schedule, the supply of energy to the blower being interrupted for predetermined periods during a given day; andwherein the wastewater within the aerobic treatment zone forms an oxygen battery which supplies oxygen during the predetermined periods in which the supply of energy to the blower is interrupted, the volume and oxygen content of the oxygen battery being configured to ensure that the oxygen concentration of the oxygen battery never falls below 2 mg/L.