SCREEN GRIT CHAMBER FOR WASTEWATER TREATMENT PLANTSWe manufacture SPK screen grit chambers designed for preliminary mechanical wastewater treatment. The unit combines screening and the separation of mineral contaminants by sedimentation in a single structure. This makes it possible to remove screenings, grit and other heavier particles before the wastewater is directed to subsequent treatment stages.
The main advantage of the screen grit chamber is the integration of several process operations in a single unit. We equip the screen grit chamber, among other components, with a screw-slot screen with a shaftless screw and an integrated screenings press. The system can also be equipped with a screenings washing function.
The screen grit chamber is designed to remove contaminants that can be separated from wastewater by mechanical methods. The first process is screening, which retains larger solid contaminants. The second is the gravitational settling of mineral particles, i.e. sedimentation.
Combining both functions in a single unit reduces the number of separate machines required at the mechanical wastewater treatment stage and allows a compact process line to be created.
One of the main functions of the screen grit chamber is the separation of mineral suspended solids from organic suspended matter. Mineral particles have a higher settling velocity than lighter organic suspended solids, allowing them to be separated in the grit chamber section of the unit.
Mineral and mechanical contaminants removed from wastewater may include:
We equip the screen grit chamber with a screw-slot screen with a shaftless screw. Its function is to retain solid contaminants and convey them towards the discharge section of the unit.
The screen is integrated with a screenings press, allowing the retained material to undergo further treatment before collection. A screenings washing function is also available.
Wastewater entering the unit first passes through the mechanical screening stage, where larger solid contaminants are retained. In the grit chamber section, separation is then based on the difference in settling velocities between mineral and organic suspended solids.
Heavier mineral particles settle, while lighter organic suspended solids remain in the wastewater stream and can be directed to subsequent stages of the treatment process.
Removing screenings and grit at an early stage of the process reduces their adverse impact on downstream equipment. The use of a screen grit chamber helps protect the wastewater treatment plant against:
The screen grit chamber can form one of the main components of preliminary mechanical wastewater treatment. Integrating screening, screenings conveying and compaction, as well as mineral solids separation, allows several process operations to be carried out in a single unit.
The unit can be used both in the construction of new wastewater treatment plants and during the modernisation of existing installations where the screenings and grit removal stage needs to be improved.
As a manufacturer of wastewater treatment equipment, we select the design of the screen grit chamber according to the conditions of the specific process line. We take into account the method of wastewater inlet and outlet, cooperation with other equipment and the method of collecting screenings and separated mineral material.
The screen grit chamber can be supplied as a stand-alone unit or as part of a larger mechanical wastewater treatment installation operating together with other process equipment.
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