水解酸化+两级AO/MBR+臭氧催化氧化+BAF+气浮处理TFT-LCD废水  

Treatment of TFT-LCD wastewater by hydrolysis acidification+two-stage AO/MBR+ozone catalytic oxidation+BAF+air flotation process

作　　者：关永年 GUAN Yongnian(Suzhou Industrial Park Qingyuan Huayan Water Services Co.,Ltd.,Suzhou 215021,China;Huayan Environmental Investment(Jiangsu)Co.,Ltd.,Changzhou 213000,China)

机构地区：[1]苏州工业园区清源华衍水务有限公司,江苏苏州215021 [2]华衍环境投资(江苏)有限公司,江苏常州213000

出　　处：《工业水处理》2024年第10期207-214,共8页Industrial Water Treatment

摘　　要：以某薄膜晶体管液晶显示器(TFT-LCD)企业的废水处理厂为例,对其接纳的废水进行分析。针对废水成分复杂、水质变化大、污染物浓度高、可生化性差以及排放要求高的特点,将废水分为有机废水、酸碱废水和含氟废水进行分类收集、分质预处理,经预处理后的3种废水混合后再进行进一步处理。根据混合废水的水质特性,设计开发了水解酸化+两级AO/MBR+臭氧催化氧化+BAF(DN型)+气浮+次氯酸钠消毒的组合处理工艺。运行结果表明,该组合工艺运行稳定,试运行期间平均出水COD、BOD_(5)、NH_(3)-N、TP、TN、SS、F^(-)、总铜分别为15、2.1、0.16、0.13、3.8、2、0.81、0.19 mg/L,出水水质能够稳定达到设计要求,直接运行成本约5.17元/m^(3)。This paper analyzed the wastewater treatment of a thin film transistor-liquid crystal display(TFT-LCD)manufacturer.In response to the complex composition,changes in water quality,high concentration of pollutants,poor biodegradability,and high discharge requirement,the wastewater was classified into organic wastewater,acid/base wastewater,and fluorine-containing wastewater for collection and pre-treatment.After pretreatment,the three types of wastewater were mixed for further treatment.Based on the characteristics of the wastewater mixed after pre-treatment,a combined process of hydrolysis acidification+two-stage AO/MBR+ozone catalytic oxidation+BAF(DN type)+air flotation+sodium hypochlorite disinfection was designed and developed.The results showed that the pro-cess was stable,the average effluent COD,BOD_(5),NH_(3)-N,TP,TN,SS,F^(-),and total Cu during trial operation were 15,2.1,0.16,0.13,3.8,2,0.81,and 0.19 mg/L respectively.The effluent quality could meet the design require-ments stably,with direct treatment cost of about 5.17 yuan/m^(3).

关 键 词：TFT-LCD废水 水解酸化 两级AO/MBR 臭氧催化氧化 曝气生物滤池 气浮 

分 类 号：X703[环境科学与工程—环境工程]