Ammonium bicarbonate draw solution reuse in forward osmosis process

CHINNAWAT, TRAISUPACHOK and JIRACHOTE, PHATTARANAWIK and SUTHA, KHAODHIAR and VASIMON, RUANGLEK (2014) Ammonium bicarbonate draw solution reuse in forward osmosis process. In: International Conference on Advances in Civil, Structural, Environmental and Bio-Technology - CSEB 2014, 08-09 March, 2014, Kuala Lumpur, Malaysia.

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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 doesn’t significantly effect on the removal efficiency. Ammonium bicarbonate is removed as CO2 and NH3 gas which can be recovered at 84.3% efficiency of removal.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Water reuse, Forward osmosis, Ammonium bicarbonate
Depositing User: Mr. John Steve
Date Deposited: 11 May 2019 10:56
Last Modified: 11 May 2019 10:56
URI: http://publications.theired.org/id/eprint/2223

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