Nitrogen removal efficiency of iron-carbon micro-electrolysis system treating high nitrate nitrogen organic pharmaceutical wastewater

来源期刊：中南大学学报(英文版)2009年第z1期

论文作者：周健 段送华 陈垚 胡斌

文章页码：368 - 373

Key words：iron-carbon micro-electrolysis； nitrogen； nitrate nitrogen； removal efficiency； removal rate

Abstract: The nitrate nitrogen removal efficiency of iron-carbon micro-electrolysis system was discussed in treating pharmaceutical wastewater with high nitrogen and refractory organic concentration. The results show that the granularity of fillings,pH,volume ratios of iron-carbon and gas-water,and HRT. have significant effects on the nitrogen removal efficiency of iron-carbon micro-electrolysis system. The iron-carbon micro-electrolysis system has a good removal efficiency of pharmaceutical wastewater with high nitrogen and refractory organic concentration when the influent TN,NH₄⁺-N,NO₃^--N and BOD₅/COD_Cr are 823 mg/L,30 mg/L,793 mg/L and 0.1,respectively,at the granularity of iron and carbon 0.425 mm,pH 3,iron-carbon ratio 3,gas-water ratio 5,HRT 1.5 h,and the removal rates of TN,NH₄⁺-N and NO₃^--N achieve 51.5%,70% and 50.94%,respectively.