Wastewater treatment equipment

Abstract

A wastewater treatment equipment comprising a reaction tank, a plurality of anodic plates, a plurality of cathodic plates, a power supply and a collection device is provided. The reaction tank comprises an inlet and an outlet. The anodic plates and the cathodic plates are placed in a staggered order in the reaction tank. The power supply is electrically connected to the anodic plates and the cathodic plates. The collection device is disposed at the bottom of the reaction tank so the colloidal particles deposited at he bottom of the reaction tank can be removed.

1 . An equipment for treating wastewater, comprising: 
 a reaction tank comprising an inlet and an outlet;    a plurality of anodic plates disposed in the reaction tank;    a plurality of cathodic plates disposed in the reaction tank, wherein the anodic plates and the cathodic plates are disposed in a staggered order;    a power supply electrically connected in parallel with the anodic plates and the cathodic plates for providing an electrical current to each of the anodic plates in which the electrical currents have equal amplitudes, or electrically connected to an outermost anodic plate of the anodic plates and an outermost cathodic plate of the cathodic plates for providing an electrical current to the outermost anodic plate so that two surfaces of each of the anodic plates and the cathodic plates except for the outermost anodic plate and the outermost cathodic plate accumulate equal but opposite charges; and    a collection device disposed at a bottom of the reaction tank to collect colloidal particles in the wastewater.    
   
   
       2 . The equipment of  claim 1 , wherein the collection device comprises: 
 a plurality of cones, wherein a top of the cone is connected to the reaction tank; and    a plurality of switch valves, wherein each of the switch valves is disposed at a bottom of each of the cone.    
   
   
       3 . The equipment of  claim 1 , wherein the collection device comprises: 
 a plurality of collection pipelines connected to the reaction tank;    a plurality of switch valves, wherein each of the switch valve is disposed in each of the collection pipelines; and    a pump connected to the collection pipelines.    
   
   
       4 . The equipment of  claim 1 , wherein a plurality of first plugs and a plurality of second plugs are disposed on two opposite sidewalls of the reaction tank for installing the anodic plates and the cathodic plates respectively, and the first plugs are extended to a bottom edge of the reaction tank, and the second plugs are not extended to the bottom edge of the reaction tank.  
   
   
       5 . The equipment of  claim 1 , wherein a ratio of width to height of the reaction tank is in a range of about 1.0 to about 2.0.  
   
   
       6 . The equipment of  claim 1 , wherein a position of the inlet is higher than a position of the outlet.  
   
   
       7 . The equipment of  claim 1 , wherein the reaction tank comprises an operational water level, wherein a height of the operational water level is maintained between the inlet and the outlet.  
   
   
       8 . The equipment of  claim 1 , wherein the reaction tank comprises a deposition height, wherein the deposition height is higher than a height of the outlet.  
   
   
       9 . The equipment of  claim 1 , wherein the anodic plates comprise iron plates or aluminum plates, and the cathodic plates comprise stainless steel plates.  
   
   
       10 . The equipment of  claim 1 , wherein the anodic plates and the cathodic plates comprise stainless steel plates.  
   
   
       11 . The equipment of  claim 1 , wherein a distance between each of the anodic plates and each of the cathodic plates is in a range of about 0.5 cm to about 15 cm.  
   
   
       12 . The equipment of  claim 1 , wherein a current density provided by the power supply is in a range of about 1.0 mA/cm2 to about 500 mA/cm2.  
   
   
       13 . The equipment of  claim 1 , further comprising an inlet pipeline, wherein a terminal of the inlet pipeline is connected to the inlet of the reaction tank.  
   
   
       14 . The equipment of  claim 13 , further comprising a pump connected to the inlet pipeline to pump the wastewater into the reaction tank.  
   
   
       15 . The equipment of  claim 14 , further comprising a switch valve connected to the inlet pipeline and between the pump and the reaction tank.  
   
   
       16 . The equipment of  claim 14 , further comprising an automatic controller electrically connected to the pump for detecting a water level, a pressure or a pH value of the reaction tank to control a suction speed.  
   
   
       17 . The equipment of  claim 1 , further comprising an outlet pipeline, wherein the terminal of the outlet pipeline is connected to the outlet of the reaction tank.  
   
   
       18 . The equipment of  claim 17 , further comprising a switch valve disposed on the outlet pipeline.  
   
   
       19 . The equipment of  claim 1 , further comprising a suction device disposed on top of the reaction tank.