| Title |
Removal of Boron in Reverse Osmosis Process for Drinking Water Production |
| Authors |
김충환(Chung Hwan Kim), 정혜원(Hye Won Chung) |
| Abstract |
The effects of pH, temperature, boron concentration and NaCl concentration etc. in bench scale experimental on boron removal were studied to remove boron from permeate of an H area reverse osmosis desalination plant for drinking water production. The boron rejection by reverse osmosis membrane used here started to increase at pH=9 and reached 97%, 0.04㎎/ℓ, at pH=11. The boron rejection tends to increase with operating temperature and pressure but decrease with boron concentration. However, the NaCl concentration upto 2,000㎎/ℓ gave little effect on the boron rejection. When the recovery ratio was increased, the boron concentration in permeate increased because boron was continuously accumulated in the feed water container. The boron rejection from sea water could be improved by rising pH but it may cause scaling. The boron concentration of permeate at pH 8 and above in an H area reverse osmosis desalination plant was satisfied with Japan guidelines value, 0.2㎎/ℓ. |