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Coarse screen channels shall be designed, constructed and equipped regarding the requirement set in Table 2-1. The maximum flow (Q$_{WW,h}$) of the related stage requirements shall be met for the unit. 

There shall be electrically actuated motor controlled penstocks in accordance with the specifications given in Section 7.8.8 and 7.8.18 at the inlet and outlet of coarse screen channels in the scope of project. The operation status of the penstocks should be monitored and controlled by the SCADA system. 

The screens shall be made from stainless steel 1.4404 in order to prevent corrosion. 

The cleaning mechanisms of the coarse screens shall be automatically operated by water level sensors (ultrasonic level or radar type sensor) located upstream and downstream of the screens (level difference). In addition to this, the cleaning mechanisms for the coarse screens shall be operated by time intervals. Time intervals must be adjustable from the SCADA. Coarse screenings shall be transferred via conveyor and automatically disposed to a container on ground level. 

The coarse screens, with their screenings containers, shall be located in a building with frost-free conditions. The requirements for the drainage, foul air collection and clean water supply system stated in Section 3.3.4.34 and 3.3.4.35 should be met for the building inner area. 

The coarse screens shall be locally controlled and operated as autonomous units. The operation status, however, shall be monitored and controlled by the SCADA system. Furthermore, water levels in front of and behind the coarse screens should be monitored from SCADA. 

Details of the coarse screens are: 

## Coarse screens: 

<img src='content_image/454712.jpg'>

## 3.3.4.3 Inlet Pumping Station 

After passing the coarse screen channel, the wastewater shall be lifted by the inlet pumps to a level that will allow gravitational flow through the rest of the wastewater treatment plant. The requirements for the drainage, foul air collection and clean water supply system stated in Section 3.3.4.34 and 3.3.4.35 should be met for the inlet pumping station inner area. 

Inlet pumping station shall be designed, constructed and equipped regarding the requirement set in Table 2-1. The maximum flow (Q$_{WW,h}$) of the related stage requirements shall be met for the unit. 

In the architectural design of the pumping station, the distance between each pump must be greater than 0.5 meters. 

