Compact Units Pretreatment Plants For Wastewater Treatment Description

This Combined Pretreatment Compact Unit equipment is fed by a pump or to gravity, through a fixed pipe. The effluent passes through a screw screen that removes the most large solid particles, then goes to a sedimentation tank where the particles sedimented are then removed by a system of scews.

This combined machine is fed by a pump or to gravity, through a fixed pipe. The effluent passes through a screw screen that removes the most large solid particles, then goes to a sedimentation tank where the particles sedimented are then removed by a system of scews. As an option you can install the system for removal of fats and suspended oils.

Combined Screening Component

Dependable, complete and compact unit
performing the following process steps:
Fine screening
Screenings dewatering
Grit separation
Grit dewatering
Grease separation and removal (optional)

Combined Screening Working Principle

The compact Wastewater Treatment Plant (STU/C) is a compact plant to pre-treat sewage entering the plant at flow rates up to 200 litres/sec.

It is a completely enclosed system for an external above ground (or below grade) installation that:

Screens solids from the effluent
Lifts the screenings above the effluent level and simultaneous washes the screenings
De-waters the screenings which are discharged into conveniently placed skips
Separates sand particles / gritl
Lifts and de-waters the grit which is either discharged into the same skip or a separate skip
Optional grease removal

The wastewater firstly enters the tank where a screw screen is placed.

Big size solid materials are filtrated by the screw screen and a screw conveyor moves the solid materials captured up to the discharge point. At the end of the conveyor, they are pressed by the compaction unit before discharge.

The water which has still solid materials in smaller sizes flows through the sedimentation tank. The particles are settled by time and a horizontal screwconveyor transports them to the collection hopper.

Finally, they are conveyed by the grit removal screw conveyor to the discharge point.
 

Combined Screening Parameter

Combined Screening Features

No odor
Low operating costs and maintenance
Reduced space requested
Building work is not necessary
Ease of installation and management
Low organic matter in the solid residue extracted
Reduction up to 40% in volume of solids removed

Combined Screening Applications

Small sewage treatment works
Municipal wastewater treatment plants
Industrial wastewater treatment plant

Combined Screening Functions

Screening
Washing/compacting of solid removed
Sand/grit separation
Degreasing
Main advantages
Odor-free
No clogging
Low maintenance and operation costs
Low room needed
No construction works needed
Easy to install and operate
Very low residual organic content in the washed out solid
Volume reduction (up to 40%) of the washed out solid