To tackle the dirty water problem in China, BOW has independently developed its own  Membrane bioreactor (MBR) technology. The microfiltration process uses a supporting structure which gives it a permanent hydrophilicity, high mechanical strength, long life-span and a great deal of  flux. The effluent meets Surface  Water Standard IV qualifications. The technology saves 50% more of the land compared with conventional methods, and it has been one of the main technologies helping to  resolve the dirty water problem in China.