H2O2强化光催化处理苯胺化工废水的应用试验

doi:10.16085/j.issn.1000-6613.2020-0468

化工进展 ›› 2020, Vol. 39 ›› Issue (12): 5299-5308.DOI: 10.16085/j.issn.1000-6613.2020-0468

H₂O₂强化光催化处理苯胺化工废水的应用试验

张华¹(), 张子鹏², 张澜澜³, 张晓飞¹, 刘译阳¹

^1.中国石油集团安全环保技术研究院有限公司，北京 102206
^2.中国石油天然气集团有限公司科技管理部，北京 100007
^3.中国石油吉林石化公司电石厂，吉林吉林 132022

出版日期:2020-12-05 发布日期:2020-12-02
通讯作者: 张华
作者简介:张华（1979—），女，博士，高级工程师，研究方向为污水处理与回用技术。E-mail：zhang-hua@cnpc.com.cn。
基金资助:
中国石油天然气集团有限公司安全环保关键技术研究与推广课题(2017D-4611);水体污染控制与治理科技重大专项(2017ZX07402-002-02);中国石油天然气集团有限公司重点实验室课题(2019D-5006-62)

In situ test of aniline wastewater degradation by photocatalytic treatment combined with H₂O₂

Hua ZHANG¹(), Zipeng ZHANG², Lanlan ZHANG³, Xiaofei ZHANG¹, Yiying LIU¹

^1.CNPC Research Institute of Safety and Environmental Technology, Beijing 102206, China
^2.CNPC Science & Technology Management Department，Beijing 100007, China
^3.PETROCHINA Jilin Petrochemical Company Calcium Carbide Factory, Jilin 132022, Jilin, China

Online:2020-12-05 Published:2020-12-02
Contact: Hua ZHANG

摘要/Abstract

摘要：

研究者在苯胺模拟废水高级氧化处理方面开展了很多研究，但针对炼化企业苯胺装置废水含盐高、色度高、COD降解难等问题尚未开展工程应用。为解决苯胺生产废水的实际问题，本研究开展了TiO₂/UV-H₂O₂氧化降解苯胺废水（1~2m³/h）的现场试验研究。考察了苯胺废水在单独TiO₂/UV、单独H₂O₂氧化及TiO₂/UV-H₂O₂协同作用下的处理效果，提出了苯胺废水的最佳处理工艺方案，并进行了成本核算。结果表明，单独TiO₂/UV和单独H₂O₂氧化对苯胺废水的脱色率和COD去除率偏低，而TiO₂/UV-H₂O₂协同作用时苯胺废水脱色率和COD去除率可达95%以上。协同氧化体系中，H₂O₂的氧化降解作用显著，H₂O₂投加量1%~2%；酸性条件利于苯胺废水的降解，特别是pH=3.8~4.2时；TiO₂/UV和H₂O₂协同作用一段时间后，停止UV而凭借残余H₂O₂可以将体系中的中间产物继续降解直至矿化成CO₂。TiO₂/UV- H₂O₂协同处理炼化企业苯胺生产废水，出水COD≤60mg/L，色度≤20倍，单位能耗约18.44kW·h/m³，明显低于文献报道值，具有显著的技术性与经济性。

关键词: 苯胺废水, UV催化, H₂O₂氧化, 脱色, 矿化

Abstract:

Advanced oxidation processes on aniline simulated wastewater treatment have received considerable studies to eliminate organic pollutants, but such techniques have rarely been employed to solve the problem of high salinity, high chromaticity and refractory COD of aniline wastewater in petrochemical enterprises. In this study, in situ degradation experiments (1—2m³/h) on aniline wastewater by TiO₂/UV-H₂O₂ were carried out. The degradation effects of aniline wastewater were examined in TiO₂/UV system, H₂O₂ oxidation system, and a combination system of TiO₂/UV and H₂O₂. An optimal treatment process for aniline wastewater was proposed and its operational costs were also evaluated. It was observed that the application of TiO₂/UV and H₂O₂ alone had relatively low decolorization rate and COD removal rate for aniline wastewater, whereas the decolorization rate and COD removal rate can reach over 95% by TiO₂/UV-H₂O₂ synergistic oxidation. H₂O₂ contributes to a predominant oxidative degradation in the synergistic oxidation system with a common total dosage of 1%~2%. Acidic conditions favored the degradation of aniline-containing wastewater, especially pH=3.8~4.2. After a period of synergistic oxidation by TiO₂/UV-H₂O₂, the UV light was turned off and the intermediate compounds in the system could be further mineralized to CO₂ by residual H₂O₂. COD and chromaticity in the effluent were below 60mg/L and 20 times, respectively, and the operational cost was 18.44 kW·h/m³, much lower than the reported value. So, TiO₂/UV-H₂O₂ seems to be significantly feasible and economical for the mineralization of aniline wastewater.

Key words: aniline wastewater, UV catalysis, H₂O₂ oxidation, decolorization, mineralization

中图分类号:

TE991.2

张华, 张子鹏, 张澜澜, 张晓飞, 刘译阳. H₂O₂强化光催化处理苯胺化工废水的应用试验[J]. 化工进展, 2020, 39(12): 5299-5308.

Hua ZHANG, Zipeng ZHANG, Lanlan ZHANG, Xiaofei ZHANG, Yiying LIU. In situ test of aniline wastewater degradation by photocatalytic treatment combined with H₂O₂[J]. Chemical Industry and Engineering Progress, 2020, 39(12): 5299-5308.

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H₂O₂强化光催化处理苯胺化工废水的应用试验

In situ test of aniline wastewater degradation by photocatalytic treatment combined with H₂O₂

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