Liquid purification or separation – With alarm – indicator – register – recorder – signal or... – Position or extent of motion
Reexamination Certificate
2011-08-30
2011-08-30
Drodge, Joseph W (Department: 1778)
Liquid purification or separation
With alarm, indicator, register, recorder, signal or...
Position or extent of motion
C210S143000, C210S151000, C210S195300, C210S220000, C210S521000, C210S605000, C210S623000
Reexamination Certificate
active
08007665
ABSTRACT:
Disclosed herein is an advanced wastewater treatment device. The device includes a wastewater treatment bath having an anaerobic bath in which phosphorus is discharged, an anoxic bath in which denitrification of nitrate nitrogen is performed, and an aerobic bath in which decomposition and nitrification of organic matter is performed. A first movable divider separates the anaerobic bath from the anoxic bath and is movably provided in the wastewater treatment bath to change relative volume of the anaerobic and anoxic baths. A second movable divider separates the anoxic bath from the aerobic bath and is movably provided in the wastewater treatment bath to change relative volume of the anoxic and aerobic baths. A divider moving unit moves the first and second movable dividers. An air supply unit includes air nozzles, an air pump, and valves. A recycling unit recycles activated sludge of the aerobic bath to the anoxic bath.
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Derwent Abstract for the Document CN 1990393, downloaded from East on May 11, 2011.
Drodge Joseph W
Edwards Angell Palmer & & Dodge LLP
Kim Kongsik
Sis Eng Co., Ltd.
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