在煤层气田开采过程中将排出大量伴生水,这种伴生水矿化度高、有机污染轻,需进行处理后才能够回用。在分析伴生水用作饮用水可行性的基础上,采用超滤—反渗透(UF—RO)工艺进行规模化处理,结果表明:膜系统运行稳定,UF作为RO进水预处理工艺,对CODMn去除率为29.94%、矿化度去除率9.55%、Cl-去除率8.33%。RO对污染物的去除效果显著,CODMn去除率为66.10%、矿化度去除率97.61%、Cl-去除率94.78%、NH3-N去除率72.94%。经GC-MS分析,系统出水基本不含有机物,水质达到《生活饮用水卫生标准》要求,吨水成本为4.03元。 During the exploitation of coalbed methane fields, a large amount of associated water will be discharged. This associated water has high salinity and low organic pollution. It can be reused only after being treated. On the basis of analyzing the feasibility of using associated water as drinking water, the UF-RO process was used to carry out large-scale treatment. The results showed that the membrane system was stable and UF was used as the pretreatment technology of RO influent, The removal rate is 29.94%, the salinity removal rate is 9.55% and the Cl-removal rate is 8.33%. The removal of pollutants by RO is remarkable. The removal rate of CODMn is 66.10%, the removal rate of salinity is 97.61%, the removal rate of Cl- is 94.78% and the removal rate of NH3-N is 72.94%. By GC-MS analysis, the system effluent basically contains no organic matter, and the water quality meets the requirements of the “drinking water health standard”. The cost per ton of water is 4.03 yuan.