Biological wastewater purification device

Abstract

Biological purification device with a multi-chamber tank with separating walls to divide the tank into at least one pretreatment chamber containing activated sludge and at least one purification chamber, as well as pump installations ( 14, 44 ) for transporting and treating wastewater, includes a distributor ( 16, 18, 20; 46, 56, 60 ) for dividing the a pump output into at least one main flow and at least one secondary flow and which is connected downstream of at least one pump installation ( 14, 44 ).

1 . Biological purification device comprising: 
 a multi-chamber tank with separating walls to divide the tank into at least one pre-treatment chamber containing activated sludge and at least one purification chamber,    at least one pump installation for transporting and treating wastewater, and    a distributor for dividing a pump output into at least one main flow and at least one secondary flow, the distributor connected downstream of said at least one pump installation.    
   
   
       2 . The purification device of  claim 1 , wherein the distributor comprises a main line and a secondary line which proceed from a pump outline line.  
   
   
       3 . The purification device of  claim 1 , wherein the distributor comprises, in the secondary line, at least one of: 
 a butterfly valve arrangement and    a ball valve arrangement.    
   
   
       4 . The purification device of  claim 3 , wherein the at least one of the butterfly and ball valve arrangement is provided in a rising section of the secondary line and comprises a valve ball which can be moved up and down between two valve seats.  
   
   
       5 . The purification device of  claim 4 , further comprising a non-return valve disposed upstream of the valve arrangement comprising the valve seats and the valve ball in the secondary line.  
   
   
       6 . The purification device of  claim 4 , further comprising a non-return valve disposed downstream of the valve arrangement comprising the valve seats and the valve ball in the secondary line.  
   
   
       7 . The purification device of  claim 1 , wherein the distributor comprises a main line and a secondary line, and a water reservoir in a raised position of the main line, such that water in the water reservoir flows back and into the secondary line when the at least one pump installation is switched off.  
   
   
       8 . The purification device of  claim 7 , wherein the distributor further comprises a valve ball which can be moved between a first valve seat at a pump outlet line and a second valve seat at an inlet of the secondary line which, when the at least one sums installation is switched on, is lifted up from first valve seat at an end of the pump outlet line and pressed by the flow of water against the second valve seat at the inlet of the secondary line, but when the at least one pump installation is switched off, sinks back onto the first valve seat at the end of pump outline line, thereby opening the inlet to the secondary line.  
   
   
       9 . The purification device of  claim 8 , an inlet area of the secondary line lies concentrically inside a broadened section of the pump outlet line.