Coal seam methane can be important source of energy. CSG is trapped in fractures and on the surface of coal and CSG production is commonly accompanied by the undesirable co-extraction of large volumes of water. This water, known as CSG-produced water, is usually rich in sodium, bicarbonate, and chloride and it must be treated prior to environmental discharge or beneficial use. Together with the University of Wollongong (Australia) we investigated a combination of RO and MD to obtain smaller quantities of brine. After this treatment the brine can be stored in smaller solar ponds, with lower environmental risks, where further evaporation can take place. The water recovered from the system can be re-used for applications such as coal washing, dust suppression, and irrigation.
MD has the potential to be the guardian angel of the environment in power industry
Further details can be found in an article recently published in the journal Desalination titled ‘Treatment of RO brine from CSG-produced water by spiral-wound air gap membrane distillation- A pilot study’.