论文部分内容阅读
以制药厂未达标二级出水为研究对象,采用二维和三维电催化氧化作为深度处理方法,考察了电催化氧化对制药废水深度处理效能。结果表明,二维和三维电催化氧化均能降低出水COD和色度,实现出水达标排放。在电流密度为7.5 m A·cm~(-2),电催化反应60 min时,与二维电催化反应器相比,三维电催化反应器可使COD去除率提高23.1%,色度降低20度,能耗降低8.2 k Wh·(kg COD)~(-1)。三维电催化体系内羟基自由基生成速率常数比二维电催化体系高2.38倍,这是三维电催化体系比二维电催化体系更具有效率高、能耗低的优势的本质原因。
In this paper, two-dimensional and three-dimensional electrocatalytic oxidation were used as the deep treatment method to investigate the secondary effluent of pharmaceutical factory that did not meet the requirements. The effectiveness of electrocatalytic oxidation for advanced treatment of pharmaceutical wastewater was investigated. The results show that two-dimensional and three-dimensional electrocatalytic oxidation can reduce effluent COD and chromaticity to achieve effluent discharge standards. At the current density of 7.5 m A · cm -2 and electrocatalytic reaction for 60 min, the three-dimensional electrocatalytic reactor improved the COD removal efficiency by 23.1% and the chroma reduction by 20% compared with the two-dimensional electrocatalytic reactor The energy consumption is reduced by 8.2 k Wh · kg kg -1. The three-dimensional electrocatalytic system hydroxyl radical generation rate constant 2.38 times higher than the two-dimensional electrocatalytic system, which is three-dimensional electrocatalytic system than the two-dimensional electrocatalytic system is more efficient and low energy consumption of the essential reasons.