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Membrane application for separating amine from effluent water

Md Isa, A. A. and Hassan, A. and Shafawi, A. (2004) Membrane application for separating amine from effluent water. In: Regional Symposium on Membrane Science and Technology 2004, 21-25 April 2004, Puteri Pan Pacific Hotel, Johor Bahru, Johor, Malaysia.

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Abstract

Amine carry over is a common discussed problem in gas plant utilizing amine as a medium to obviate carbon dioxide (CO2) from the incoming gas stream. Amine solution used at these gas plants is formulated accordingly with the concentration of CO2 in the gas stream. As known, mixture of amine with water is a tenacious and well mixed mixture, hence, to separate them is an arduous and a formidable challenge. Improper discharge of amine rich effluent into the environment can be precarious. Amine carry-over into the effluent will increase the concentration of chemical oxygen demand (COD) of the water. Higher COD value means higher level of organic contaminants. As mandated by laws, waste water to environment needs to have a COD value of < 100 mg/L, hence leave most LNG plants with no option but to look for ways to alleviate this onerous problem. In most cases, the use of bio-treater utilizing bacteria as a treatment media is one of the selected solutions. However, the extent use of the process is somewhat limited and cannot be utilized in the case of very high COD value. High COD effluent feed will lead to the demise of the bacteria in the bio-treater units which would lead to other vicious problems. This study will focus on and expound the adverse effect of amine solution to COD value of the effluent. An unprecedented approach utilizing membrane as a way to separate amine from water, thus reduce COD of the effluent would be put on trial. The crux of the study is to reduce high COD of the incoming effluent down to the accepted level by DOE, which is < 100 mg/L prior to disposal. Several membrane types ranging from reverse osmosis (RO) membrane down to micro filtration membrane have been selected for the pilot plant trial. From the study, we concluded that the application of membrane to achieve the objective set is propitious for commercial and industrial development.

Item Type:Conference or Workshop Item (Paper)
Subjects:T Technology > TP Chemical technology
ID Code:1033
Deposited By: Pn Norazana Ibrahim
Deposited On:23 Feb 2007 08:46
Last Modified:01 Jun 2010 02:50

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