Dembe Trading Enterprises located on Jinja road at the outskirts of Kampala, have four manufacturing factories (ice cream, potato wafers (Indian Kurkure), candles and Dairy products. Due to the stringent regulations requiring the treatment of effluent waste water before discharge, Davis & Shirtliff was approached to provide a solution for treating the waste water from their factories to permissible levels that comply with regulation.

Davis and Shirtliff (D&S) embarked to supply and install a Dissolved Air Floatation Unit (DAF) followed by locally assembled bio digester from Bioliff to treat the combination of effluent wastewater from the various factories.

The system was designed such that the recycle stream combines and mixes with incoming waste water in an internal contact chamber where the dissolved air comes out of solution in the form of micron-sized bubbles that attach to the contaminants.

The bubbles and contaminants rise to the surface and form a floating bed of material that is removed by a motorized surface skimmer into an internal hopper for further handling. In simpler terms, the waste water is collected, then the liquids and solids are separated, the effluence is then broken down in the presence of oxygen and then chlorine is introduced into the clean water.

All treated effluent is treated to meet or exceed the NEMA Water Quality Discharge Standards and is suitable for the irrigation of lawns, sports fields, golf courses and agricultural plots.

The project helps in cost cutting for the factory since water does not go to waste and at the same time, the environment is conserved against pollutants.