预还原-多相催化氧化芬顿工艺处理煤化工废水工程工艺设计  

Technological Design of Prereduction-Heterogeneous Catalytic Oxidation Fenton Process for Coal Chemical Wastewater Treatment Project

作　　者：毛立波 焦阳 高雅 穆天龙 刘振江 MAO Libo;JIAO Yang;GAO Ya;MU Tianlong;LIU Zhenjiang(Shanxi Urban and Rural Planning and Design Institute Co.,Ltd.,Taiyuan030001,China)

机构地区：[1]山西省城乡规划设计研究院有限公司,山西太原030001

出　　处：《净水技术》2022年第9期110-116,共7页Water Purification Technology

摘　　要：某污水处理厂进水主要为煤化工废水,具有成分复杂、可生化性差、难以直接生物降解等特点,处理难度较高。结合进水水质特点,采用芬顿预氧化工艺提高废水的可生化性,形成预氧化处理+改良AAO+深度处理的工艺流程,降解工业废水中有机污染物,以较低成本实现达标排放。其中,预氧化工艺采用多相催化氧化技术,并通过增加预还原反应器对其进行改进,进一步增强了污水的可生化性。在现行规范的基础上,对处理工艺参数进行了计算和讨论,确定了关键设计参数,主要包括:预还原时间为20~25 min,催化氧化时间为15~20 min;预还原反应器高径比为(10.0~12.0)∶3.5,催化氧化反应器高径比为(8.0~10.0)∶3.5;FeSO_(4)/H_(2)O_(2)投加质量比为(1.0~1.5)∶1.0;pH值为3.0~5.5等。工艺设计过程及参数选取结果为类似工程提供了技术和工程参考。Coal chemical wastewater contributes a major part of the influent of a wastewater treatment plant(WWTP).Due to the complex composition,poor biodegradability,difficult to biodegrade directly and other characteristics,the treatment of the influent is difficult.Considering the characteristics of influent quality,the Fenton peroxidation process was adopted to improve the biodegradability,thus forming a treatment process constituted by peroxidation+improved AAO+advanced treatment.The treatment process aimed to degrade organic pollutants of the industrial wastewater,and achieved the discharge standards at a low cost.The heterogeneous catalytic oxidation technology was adopted as the preoxidation process,and was improved by adding a pre-reduction reactor to further enhance the biodegradability of wastewater.On the basis of current norms,calculations and discussions of the parameters for the treatment process were carried out.The key design parameters were determined as:pre-reduction time was 20~25 min,catalytic oxidation time was 15~20 min;the height and diameter ratio of pre-reduction reactor was(10.0~12.0)∶3.5,the height and diameter ratio of catalytic oxidation reactor was(8.0~10.0)∶3.5,the dosage mass ratio of FeSO_(4)/H_(2)O_(2) was(1.0~1.5)∶1;pH value was 3.0~5.5,etc.The design of treatment process and the choice of parameters provide technical and engineering references for similar projects.

关 键 词：污水处理 煤化工废水 多相催化氧化 芬顿氧化 深度处理 

分 类 号：X703[环境科学与工程—环境工程] TQ09[化学工程]