摘要
随着“双碳”目标的制定以及造纸废水重复利用政策的颁布,开发清洁高效、无二次污染的造纸废水深度处理技术意义重大。研究通过干湿交替-曝气氧化的技术方案制备了铁基催化剂,XRD、XPS等表征结果显示该催化剂的表层负载物为纤铁矿(γ-FeOOH)。建立了γ-FeOOH催化臭氧微气泡的反应体系,并系统研究了该体系对造纸废水生化出水中COD_(Cr)的去除效果。试验结果显示,当pH值为7、催化剂投加量为300 g/L、臭氧投加量为9.9 mg/min时,该体系对COD_(Cr)的去除率约为58%。基于上述结果,进一步建立γ-FeOOH催化剂-臭氧微气泡催化与曝气生物滤池(BAF)的联合降解体系,该联合体系连续运行时,对造纸废水生化出水中COD_(Cr)去除率为60%~70%。该联合体系在有效降解有机污染物的同时,无二次污染产生,无总盐引入,有利于造纸废水的循环利用,践行了“双碳”理念。
With the formulation of the"double-carbon"goal and the promulgation of the papermaking wastewater reuse policy,it is great significance to develop a clean,efficient,and non-secondary pollution advanced treatment technology for papermaking wastewater.Iron-based catalyst was prepared by the technical scheme of alternating dry and wet-aeration oxidation in the study.The characterization of XRD、XPS and other mehods showed that the surface material of the catalyst was lepidocrocite(γ-FeOOH).The system of catalytic microbubble ozonation withγ-FeOOH catalyst was established and used for a systematic study on advanced treatment of papermaking wastewater.The test results showed that the COD_(Cr)removal rate of the system was about 58%under the conditions of pH value of 7,catalyst dosage of 300 g/L and ozone dosage of 9.9 mg/min.Based on the above research results,a biological aerated filter was connected behind the system to form a combined system.The results of continuous operation showed that when the combined system was used for advanced treatment of papermaking wastewater,the COD_(Cr)removal rate was maintained at 60%~70%.While effective degradation of organic pollutants,the combined system does not produce secondary pollution,and no total salt added,which was conducive to the recycling of papermaking wastewater and was in line with the concept of"double carbon".
作者
曾科
刘玉莎
林达
陈文韬
黄成涛
陈剑
ZENG Ke;LIU Yusha;LIN Da;CHEN Wentao;HUANG Chengtao;CHEN Jian(Hunan Bossco Environmental Protection Technology Co.,Ltd.,Changsha 410000,China)
出处
《净水技术》
CAS
2023年第2期117-124,共8页
Water Purification Technology
基金
高新技术产业科技创新引领计划:污水处理厂深度脱氮除磷与减污降碳关键技术研发及应用示范(2021GK4059)。
关键词
纤铁矿(γ-FeOOH)
微气泡
催化臭氧
造纸废水
曝气生物滤池
深度处理
lepidocrocite(γ-FeOOH)
microbubble
catalytic ozonation
papermaking wastewater
biological aerated filler(BAF)
advanced treatment
作者简介
通信作者:曾科(1984—),男,博士,研究方向为臭氧微纳米气泡在废水处理中的应用,E-mail:bainiuc@126.com。
