OKADA Dryer which utilizes a hot dry air generators using refrigerant heat pump has the capability to evaporate water moisture from wastewater sludge thereby reduces the moisture content and weight. Without the use of any flammable heat source such as fuel, heater element, gas burner etc, OKADA Dryer dries the wet sludge in an intrinsically safe and energy efficient solution. The disposal cost of the toxic sludge is significantly reduce due to the weight reduction and are easy disposed.

The OKADA Sludge Dryer operates by the dehydration principle of circulating dry hot air at 50°C to 60°C through a designated volume of sludge cake. Moisture evaporated from the wet sludge cake will then be channeled to the dehumidifying unit and water moisture condensed via a cooling coil heat exchanger. The dry air is then reheat via the heating coil. The dry hot air with enormous water adsorbing capacity is then reintroduced to the drying chamber and circulated in a closed-loop through the entire system again. The refrigeration cycle of combined energy of both cold and hot heat exchangers;  give an advantage of a high energy efficiency in the drying process.