Abstract: “Membrane technology is one of the advance wastewater treatment processes with an aim for treated wastewater reuse. Forward osmosis is the membrane process in which the trans-membrane transport was driven by osmotic pressure of draw solution. Ammonium bicarbonate is one of the chemicals that can be utilized as draw solution because of its high solubility and osmotic pressure properties. Recovery concentration unit in forward osmosis desalination system is necessary for draw solution reuse. In this study, thermal process was chosen for ammonium bicarbonate removal. Heated at 60 ̊C was provided to the synthetic draw solution withinitial ammonium bicarbonate concentration between 0.05 to 0.5 M, and then ammonium bicarbonate concentration was measured on an hourly basis. The result indicated that heat can’t completely removed ammonium- bicarbonate. The addition of air bubble can increase the removal efficiency to 40 – 70 %. The optimal heating time is five hour and the additional heating do”

Keywords: Water reuse, Forward osmosis, Ammonium bicarbonate