| This study was carried out to test the feasibility of electrochemical method in the treatment of aquacultural effluent and to determine the optimal conditions of operating parameters including applied voltage and reaction time. In electrolysis, dioxide iridium coated titanium (Ir0_2/Ti) and stainless steel plate were used for anode and cathode respectively. Possible optimum range for these operating variables are experimentally determined. In experiment of batch system, COD_Mn removal rates were 32.8%, 44.6% and 57.0%. And removal rate of ammonia were 62.0%, 70.4% and 79.1% when electrical density were 35,71A/㎡, 71.42A/㎡ and 107.14A/㎡. It was observed that the removal rate of organic matters and ammonia is proportional to the current density and the retention time. In experiment of continuous system, variation of COD_Mn, SS and ammonia were respectively 25.8∼10.2, 29.3∼15 ㎎/l and 3.57∼0.73 ㎎/l when the removal of organic matters and ammonia is conducted at the same time. Because oxides, such as hyperchloric ions, interfere the process of oxidation of ammonia, the removal rate get reduced. After ammonia is removed, organic matters are oxidized. Therefore it is estimated that the ammonia should get removed first. |
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