pH过程控制对铁炭微电解-Fenton影响中试研究  

A PILOT STUDY ON EFFECTS OF pH PROCESS CONTROL ON FERRIC-CARBON MICRO-ELECTROLYSIS-FENTON PROCESS

作　　者：苏建文 时永辉 许尚营 王俊超 王彩冬 郑浩 

机构地区：[1]山东新时代药业有限公司环境与资源化研究中心,山东临沂273400

出　　处：《环境工程》2013年第S1期131-134,共4页Environmental Engineering

摘　　要：采用铁炭微电解-Fenton联合工艺处理制药废水生化出水,探讨了初始pH对微电解过程COD降解速率、出水中Fe2+和Fe3+变化规律以及后续Fenton氧化效果的影响,为优化联合工艺提出了微电解反应pH过程控制的理论。采用pH过程控制时,微电解对COD降解速率大大提高,降解过程基本符合零级反应动力学,同时可大大提高Fe2+和Fe3+浓度及总铁析出量。试验结果表明:当初始pH=2.5,以3.0L/h连续性投加稀硫酸100 min,曝气微电解反应2 h,出水再投加1.0mL/L的H2O2进行Fenton氧化2 h,出水COD总去除率可达85.6%;采用pH过程控制可将微电解出水ρ(Fe2+)浓度从48.6 mg/L提高至149 mg/L,COD降解速率从10.9 mg/(L·h)提高至23.8 mg/(L·h)。Treatment of pharmaceutical wastewater biochemical effluent was studied by using ferric-carbon Micro-electrolysis-Fenton combined process. The effects of initial pH on effluent COD degradation rate、Fe2 +and Fe3 +concentration variation and subsequent Fenton oxidation process were discussed. Theory of pH process control was proposed in order to optimize the combined process of micro-electrolysis-Fenton oxidation. The COD degradation rate,Fe2 +and Fe3 +concentration variation and the quantity of total iron were improved greatly as pH process control was used,and COD degradation process corresponded with zero-order dynamical reaction equation. The results showed that when initial pH = 2. 5,kept adding dilute sulfuric acid for 100 min as 3. 0L/h continuously,aerating micro-electrolysis reaction 2 h,Fenton oxidation 2 h by adding 1 mL/L H2O2,the effluent COD was less than 60 mg/L and COD removal rate achieved 85. 6%. Micro-electrolysis effluent Fe2 +concentration could be increased from 48. 6 mg/L to 149 mg/L,COD degradation rate from 10. 9 to 23. 8 mg/( L·h) by using pH process control.

关 键 词：微电解 Fenton pH过程控制 COD降解速率 Fe2+和Fe3+浓度 制药废水 

分 类 号：X703[环境科学与工程—环境工程]