The increased use of macerators and chopper pumps is putting an increase strain on other pumps and screens in the same network.
As the rag balls pass into these devices the cutting nature slices the 
rags into thin strips like string. This string passes seamlessly through the pumps in the station they are installed in. Other than heavy maintenance costs to maintain the choppers or macerators and the increased energy costs by these energy hungry machines these tend to successfully chop the rags up small enough to pump.
The problem happens at the next station. These sliced stringy rags then enter the next pump and the rotating action of the pump knits these rags together to form rope like material. Even clog free pumps struggle to keep up with these types of rags as the particles are too small to be swept off the impellers. This make-up of the rags also causes the balls to form outside the volute of the pump away from the usual anti blockage measures. See picture right
The solution is at hand with the Deragger II, a low-voltage electronic pump management system. The Deragger II’s patented technology works in real time to identify and detect the stringy material sticking to the impeller before it knits into a blockage. Upon detection of individual strings sticking to the impeller the Deragger II stops the pump and performs a reverse rotation until the string is dislodged enough to be pumped on. In addition, the device boasts a wealth of sophisticated built-in diagnostics and power monitoring.
Measuring just 35mm in width, the Deragger II is din rail mounted and easily retrofits into existing control panels, making it the perfect solution for even the smallest pumping stations. It connects easily through plug and play, with In-line (DOL), Delta-wye (Star/Delta), Soft Start or VSD.
Installing the Deragger II can allow you to remove the macerators and revert back to non shredding pumps. Thus improving efficiency and keeping the rags whole and easier to remove from the effluent at the treatment stage.