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

反渗透处理煤层气产出水中试示范及其控制模型研究(英文)

作　　者：钱智 刘新春 余志晟 张洪勋 琚宜文 

机构地区：[1]College of Resources and Environment,Graduate University of Chinese Academy of Sciences [2]Earth College,Graduate University of Chinese Academy of Sciences

出　　处：《Chinese Journal of Chemical Engineering》2012年第2期302-311,共10页中国化学工程学报（英文版）

基　　金：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);the National Science Foundation for Post-doctoral Scientists of China(20110490627)

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.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 

分 类 号：X752[环境科学与工程—环境工程]