| CPC C02F 3/1226 (2013.01) [C02F 1/325 (2013.01); C02F 3/121 (2013.01); C02F 3/1215 (2013.01); C02F 11/04 (2013.01); C02F 11/12 (2013.01); C02F 1/32 (2013.01); C02F 2001/007 (2013.01); C02F 2101/16 (2013.01); C02F 2201/322 (2013.01); C02F 2209/02 (2013.01); C02F 2209/06 (2013.01); Y02W 10/10 (2015.05)] | 8 Claims |
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1. A system for cleaning wastewater, comprising:
an absorption-biodegradation-denitrification (ABN) reactor;
a sequential adsorption reactor;
a disinfection reactor; and
a sludge anaerobic fermentation reactor;
wherein:
the ABN reactor is an integrated reactor comprising five secondary treatment units: a biosorption tank, an intermediate sedimentation tank, a biologically-enhanced degradation tank, a denitrification biofilter, and a secondary sedimentation tank, which are connected sequentially and separated from each other by a partition wall; the biosorption tank is filled with high-load activated sludge; the biosorption tank comprises a first water inlet, a first water outlet, a first stirring device, a first aeration device, and a first sludge return port; the first water inlet is disposed on a first end of the biosorption tank and the first water outlet is disposed on a second end of the biosorption tank; the first stirring device, the first aeration device, and the first sludge return port are disposed in a bottom of the biosorption tank; the first water outlet communicates with the intermediate sedimentation tank; the intermediate sedimentation tank comprises a first slope plate, a first sludge outlet, and a second water outlet; the first slope plate is disposed in the intermediate sedimentation tank; the first sludge outlet communicates with a first sludge return pipe and a first sludge outlet pipe; the second water outlet is disposed on a rear end of the intermediate sedimentation tank and communicates with the biologically-enhanced degradation tank; the first sludge return pipe is connected to the first sludge return port; the biologically-enhanced degradation tank is an integrated fixed-film activated sludge system; the biologically-enhanced degradation tank comprises a second aeration device, a second sludge return port, a filler interceptor, and a third water outlet; the second aeration device and the second sludge return port are disposed in the bottom of the biologically-enhanced degradation tank; the filler interceptor is disposed on one end of the biologically-enhanced degradation tank and is connected through the third water outlet to the secondary sedimentation tank; the secondary sedimentation tank comprises a second slope plate, a second sludge outlet pipe, and a fourth water outlet; the second slope plate is disposed in the secondary sedimentation tank; the second sludge outlet pipe is disposed in the bottom of the secondary sedimentation tank and is configured to communicate with a second sludge return pipe and a second sludge outlet pipe; the second sludge return pipe is connected to the second sludge return port; the fourth water outlet is disposed on one end of the secondary sedimentation tank and is connected to the denitrification biofilter; the denitrification biofilter is a downflow denitrification biofilter comprising a carbon source dosing device, an inlet channel, a backwash air inlet, and a backwash water outlet, a denitrification filler, a supporting layer, an air-water distribution device, a backwash water inlet, a water collection channel, and a fifth water outlet; the carbon source dosing device, the inlet channel, the backwash air inlet, and the backwash water outlet are disposed on the top portion of the denitrification biofilter; the denitrification filler is disposed in the denitrification biofilter; the supporting layer, the air-water distribution device, the backwash water inlet, the water collection channel, and the fifth water outlet are disposed in the bottom of the denitrification biofilter;
the sequential adsorption reactor is a cylindrical reactor comprising secondary treatment units, an overflow pipe, a second water inlet, a third sludge outlet, and a sixth water outlet; the second water inlet and the third sludge outlet are disposed in the middle of the bottom of the sequential adsorption reactor; the sixth water outlet is disposed on the outside bottom of the sequential adsorption reactor; the secondary treatment units each comprises a plurality of adsorption devices; the second water inlet is connected to the overflow pipe; and the fifth water outlet is connected through a first diversion pipe to the fifth water outlet;
the disinfection reactor comprises a third water inlet, a disinfection device, a diversion wall, a seventh water outlet, and a drainage pipe; the third water inlet is disposed on a first end of the disinfection reactor; the disinfection device and the diversion wall are disposed in the disinfection reactor; the seventh water outlet is disposed in a bottom of a second end of the disinfection reactor and is connected to a drainage pipe; the third water inlet is connected through the second diversion tube to the sixth water outlet; and
the sludge anaerobic fermentation reactor is a cylindrical upflow reactor comprising a gas emission device, a plurality of feed inlets, a second stirring device, a plurality of feed outlets, a sludge circulating pipe, a sludge dewatering device, a liquid collection device; the gas emission device is disposed on the sludge anaerobic fermentation reactor; the plurality of feed inlets is disposed in the lower part of the sludge anaerobic fermentation reactor; the second stirring device is disposed in the sludge anaerobic fermentation reactor; the plurality of feed outlets and the sludge circulating pipe are disposed at different water levels marked in the sludge anaerobic fermentation reactor; the sludge dewatering device and the liquid collection device are disposed outside of the sludge anaerobic fermentation reactor; the plurality of feed inlets is connected to the first sludge outlet pipe, and the second sludge outlet pipe; the plurality of feed outlets is sequentially connected to the sludge dewatering device and the liquid collection device via the third diversion tube; the liquid collection device is connected to a carbon source feeder via the fourth diversion pipe.
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