Rectangular Grit Removal

Rectangular tanks are commonly used for sand removal in wastewater treatment plants as in aerated and non-aerated systems. A scraper bridge is used to remove sand, which settles into the tank. The bridges which move in both directions laterally sand is scraped to the one end or the center of the tank, from where they are removed using airlift or submersible type pumps. Sand-water mixture is generally washed to remove organic matter from inorganic, then they are collected within a container to be disposed of. Grit bridges can be designed to scrape single, dual, triple, and quadrant channels. For small installations, sand washing is incorporated on top of the scraper bridge.
Grit bridge scraper consists of following main parts:
Bridge
It is constructed from standard or folded-type profiles by welding. The walkway is manufactured from the galvanized grating. The hand railing of the bridge is made of standard galvanized pipes and bolted to the bridge.
1 – Travelling bridge
2 – Driveshaft
3 – Sand scraper
4 – Surface scraper
5 – Limit switch
6 – Sandoit
7- Drive wheel
8 – Drive unit

Drive unit:
It is formed by a geared motor which is located in the middle of the moving bridge and two drive wheels set which are located at both ends. Each wheelset has one duty and one idle wheel.
Centrally located drive unit carries the movement to the drive wheels using the horizontal shaft. For long bridges, two drive units are utilized at both ends. Rubber wheels or steel wheels and rail combinations can be used for bridge tracks
Grease removal system (optional):
If required, a grease removal system made of welded standard profiles and sheets is provided to collect grease and discharge it to the grease trough
Benefits of EGY-FAB rectangular grit removal:
Reliable design
Flexible solution
Quick installation
High-efficiency grit and grease removal
Easy installation even into existing tanks
Water-submerged parts supplied in stainless steel