Study On The Application Of Reverse Osmosis On Recycled Water Of Factory Moat

The study focuses on the reuse of Baosteel's factory moat, as the quantity of the moat is very lagre and the main pollutant in it is conductivity, Mn, Fe and so on, this research is to find a way to better the quality of the moat and to reuse it.The study firstly used the UF/RO treatment system to do the experiment, the result showed this combination process can treat the raw water effectly, and the quality of the effluent had meet the Baosteel's standard. But the operation condition was not well, the cleaning cycle of RO was relatively short.The study also used the Constructed Wetland/UF/RO treatment system to do the experiment, and the result shows, this combination process can treat the raw water effectly, when RO run under the 75% recycle rate, the effluent's conductivity was about 30μs/cm, desalination rate was about 98%, the effluent had meet the Baosteel's standard, and the operation condition was also well, the cleaning cycle of RO was much longer(at least 1 month).Finally, the study use the Constructed Wetland/UV/MF/RO treatment system to do the experiment. The result showed this combination process can treat the raw water effectly, and the operation condition of RO system is good. Then we use SEM, AFM, XRF and IR to analyse the polluted RO membrane and the new RO membrane, to find out the main pollutant.After analysing all the experiment result deeply, it showed that the Constructed Wetland/UV/MF/RO combination process was more economical and effective, it has a good prospect in Baosteel's factory moat reuse treatment.