臭氧-活性炭对高浓度制药废水可生化性影响研究

Effect of ozone-activated carbon on biodegradability of high concentration pharmaceutical wastewater

以高浓度制药废水为研究对象,以微生物的好氧呼吸速率(OUR)为指标,考察臭氧-活性炭氧化工艺对该废水可生化性的影响。结果表明,臭氧-活性炭氧化工艺对该废水可生化性的提高效果远远大于单独臭氧氧化和活性炭吸附的提高效果之和;在臭氧-活性炭氧化工艺中,活性炭的加入能够加速臭氧分解产生羟基自由基,并且随着废水p H值的升高,出水OUR值逐渐增大,在p H值为10.5时达到最大;活性炭具有较强的稳定性,连续使用5次后其催化活性基本保持不变。

Taking high concentration pharmaceutical wastewater as the research object and oxygen uptake rate(OUR)of microorganisms as the indicator,the effect of ozone-activated carbon process on biodegradability of the said kind of wastewater was investigated.The results showed that,the promotion effect of wastewater biodegradability by ozone-activated carbon process was much greater than the sum of the effect by ozone oxidation alone and activated carbon adsorption.In ozone-activated carbon oxidation process,the addition of activated carbon could accelerate the decomposition of ozone to produce hydroxyl radicals.With the increase of the wastewater pH value,the effluent OUR value gradually increased and reached the maximum when the pH value was10.5.Activated carbon had a strong stability,which could basically maintain catalytic activity after5times of continuous use.