铁炭-Fenton联合预处理CLT酸酸析废水效能

The treatment of CLT-acid wastewater by using micro-electrolysis and Fenton oxidation

摘要:

针对我国高产量有机颜料CLT酸,采用铁炭微电解-Fenton联合工艺对其产生的酸析废水进行预处理效能研究,分别考查进水pH、反应时间、铁炭比例、过氧化氢投加量及投放时间等因素对CLT酸酸析废水处理效果的影响．结果表明: 当原水COD在28.1～34.5 g/L时,控制进水pH 2.5左右、铁炭比2∶1、反应时间60 min的条件下,铁炭微电解预处理工艺对COD的去除率大于32％;向微电解出水投加30％（质量分数）、0.15 mol/L的过氧化氢溶液进行Fenton预处理,在常温、反应时间60 min的条件下,对COD的去除率大于43％,废水可生化性由原水的0.08提高到0.43．

Abstract:

The Fe/C micro-electrolysis and Fenton combined process was used to solve the high yield organic CLT acid wastewater in our country. The influence factors of pH, reaction time, ratio of iron and coke, H₂O₂ dosage and reaction time of H₂O₂ were investigated. The results show that when the influent COD is 28.1 g/L to 34.5 g/L, pH is 2.5, ratio of iron and coke is 2∶1 and the reaction time is 60 min, the removal rate of COD by ferric-carbon micro-electrolysis is above 30％. For treatment with the Fenton when the H₂O₂ (30％) dosage is 0.15 mol/L, the reaction time is 60 min and the temperature is 20 to 30 ℃, the removal rate of COD reaches more than 43％, B/C ratio of wastewater increases from 0.08 to 0.43.