A Pilot-scale Demonstration of Reverse Osmosis Unit for Treatment of Coal-bed Methane Co-produced Water and Its Modeling

Chin.J.Chem.Eng. ›› 2012, Vol. 20 ›› Issue (2): 302-311.

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A Pilot-scale Demonstration of Reverse Osmosis Unit for Treatment of Coal-bed Methane Co-produced Water and Its Modeling

QIAN Zhi¹, LIU Xin-Chun¹, YU Zhi-Sheng¹, ZHANG Hong-Xun¹, Jü Yi-Wen²

1. College of Resources and Environment, Graduate University of Chinese Academy of Sciences, Beijing 100049, China;
2. Earth College, Graduate University of Chinese Academy of Sciences, Beijing 100049, China

Received:2012-01-06 Revised:2012-02-21 Online:2012-05-02 Published:2012-04-28
Supported by:
Supported by the National Basic Research Program of China(2011ZX05060-005;2009ZX05039-003),the National Natural Science Foundation of China(21106176),the President Fund of GUCAS(Y15101JY00)and the National Science Foundation for Post-doctoral Scientists of China(20110490627).

A Pilot-scale Demonstration of Reverse Osmosis Unit for Treatment of Coal-bed Methane Co-produced Water and Its Modeling

钱智¹, 刘新春¹, 余志晟¹, 张洪勋¹, 琚宜文²

1. College of Resources and Environment, Graduate University of Chinese Academy of Sciences, Beijing 100049, China;
2. Earth College, Graduate University of Chinese Academy of Sciences, Beijing 100049, China

通讯作者: YU Zhi-Sheng
基金资助:
Supported by the National Basic Research Program of China(2011ZX05060-005;2009ZX05039-003),the National Natural Science Foundation of China(21106176),the President Fund of GUCAS(Y15101JY00)and the National Science Foundation for Post-doctoral Scientists of China(20110490627).

Abstract

Abstract: This study presents the first demonstration project in China for treatment of coal-bed methane(CBM) co-produced water and recycling.The work aims to provide a research and innovation base for solving the pollution problem of CBM extraction water.The reverse osmosis(RO)unit is applied to the treatment of CBM co-produced water.The results indicate that system operation is stable,the removal efficiency of the total dissolved solids(TDS) is as high as 97.98%,and Fe,Mn,and F^- are almost completely removed.There is no suspended solids(SS)detected in the treated water.Furthermore,a model for the RO membrane separation process is developed to describe the quantitative relationship between key physical quantities—membrane length,flow velocity,salt concentration, driving pressure and water recovery rate,and the water recovery restriction equation based on mass balance is developed.This model provides a theoretical support for the RO system design and optimization.The TDS in the CBM co-produced water are removed to meet the“drinking water standards”and“groundwater quality standards” of China and can be used as drinking water,irrigation water,and livestock watering.In addition,the cost for treatment of CBM co-produced water is assessed,and the RO technology is an efficient and cost-effective treatment method to remove pollutants.

Key words: coal-bed methane co-produced water, high salt, pretreatment process, mass balance,reverse osmosis

摘要： This study presents the first demonstration project in China for treatment of coal-bed methane(CBM) co-produced water and recycling.The work aims to provide a research and innovation base for solving the pollution problem of CBM extraction water.The reverse osmosis(RO)unit is applied to the treatment of CBM co-produced water.The results indicate that system operation is stable,the removal efficiency of the total dissolved solids(TDS) is as high as 97.98%,and Fe,Mn,and F^- are almost completely removed.There is no suspended solids(SS)detected in the treated water.Furthermore,a model for the RO membrane separation process is developed to describe the quantitative relationship between key physical quantities—membrane length,flow velocity,salt concentration, driving pressure and water recovery rate,and the water recovery restriction equation based on mass balance is developed.This model provides a theoretical support for the RO system design and optimization.The TDS in the CBM co-produced water are removed to meet the“drinking water standards”and“groundwater quality standards” of China and can be used as drinking water,irrigation water,and livestock watering.In addition,the cost for treatment of CBM co-produced water is assessed,and the RO technology is an efficient and cost-effective treatment method to remove pollutants.

关键词: coal-bed methane co-produced water, high salt, pretreatment process, mass balance,reverse osmosis

QIAN Zhi, LIU Xin-Chun, YU Zhi-Sheng, ZHANG Hong-Xun, Jü Yi-Wen. A Pilot-scale Demonstration of Reverse Osmosis Unit for Treatment of Coal-bed Methane Co-produced Water and Its Modeling[J]. Chin.J.Chem.Eng., 2012, 20(2): 302-311.

钱智, 刘新春, 余志晟, 张洪勋, 琚宜文. A Pilot-scale Demonstration of Reverse Osmosis Unit for Treatment of Coal-bed Methane Co-produced Water and Its Modeling[J]. Chinese Journal of Chemical Engineering, 2012, 20(2): 302-311.

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A Pilot-scale Demonstration of Reverse Osmosis Unit for Treatment of Coal-bed Methane Co-produced Water and Its Modeling

A Pilot-scale Demonstration of Reverse Osmosis Unit for Treatment of Coal-bed Methane Co-produced Water and Its Modeling

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