Treatment of Eucalyptus chemical-mechanical pulp wastewater by coupling system of advanced catalytic oxidation and biodegradation: Synergistic effect of ozonation photocatalytic-microbial
Treatment of Eucalyptus chemical-mechanical pulp wastewater by coupling system of advanced catalytic oxidation and biodegradation: Synergistic effect of ozonation photocatalytic-microbial
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DOI：
10.1016/j.jwpe.2023.104071
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发表时间：
2023-10
影响因子：
7
通讯作者：
Zhongqin Jiang;Maman Galandi Abdoulaye;Tiantian Wei;Xi Xiao;Yinna Liang;Jianhua Xiong;Guoning Chen;Yongli Chen
中科院分区：
文献类型：
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作者：
Zhongqin Jiang;Maman Galandi Abdoulaye;Tiantian Wei;Xi Xiao;Yinna Liang;Jianhua Xiong;Guoning Chen;Yongli Chen
针对制浆造纸工业化学机械浆废水处理难度大、排放量大、有机污染负荷大、成分复杂等问题，开发了臭氧氧化与光催化-生物处理紧密耦合的高级氧化与生物降解耦合技术修复化学机械浆废水。本研究的重点是探索该体系的优化，了解其降解机理，了解微生物的反应行为。此外，该研究还评估了ICOPB固有的四种潜在机理的降解效率，包括吸附、光催化、生物处理和光催化-生物间接耦合处理废水。在臭氧浓度为35 mg/min、载体填充率为5%、pH值为7、曝气量为0.6 mg/min的最佳条件下，废水对COD、BOD和TOC的降解率分别达到80.7%、91.6%和84.6%。与ICOP(臭氧氧化和光催化紧密耦合)法相比，ICOPB法具有更高的去除效率和更全面的矿化作用。微生物多样性结果表明，变形杆菌对ICOPB系统处理的化学机械抛光废水的后续生物降解具有积极的作用。GC-MS分析和中间产物毒性评价表明，ICOPB显著提高了有机物的降解速率，同时降低了废水的毒性。总之，这项研究的结果为有效降解化学机械浆废水提供了一种创新的方法，从而解决了制浆造纸工业中一个重要的环境问题。
In addressing the issues concerning the challenging treatment, extensive discharge, substantial organic pollution load, and the intricate composition of chemical-mechanical pulp (CMP) wastewater in the pulp and paper industry, an innovative coupled advanced oxidation and biodegradation techniques known as the intimate coupling of ozone oxidation and photocatalysis-biological treatment (ICOPB) was developed for CMP wastewater remediation. The focus of the present research was to explore the optimization of this system, to comprehend the degradation mechanisms, and to understand microbial reaction behavior. Moreover, the study evaluated the degradation efficiency of four potential mechanisms inherent to ICOPB, which include adsorption, photocatalysis, biological treatment, and coupled photocatalytic-biological indirect wastewater treatment. Under the optimal conditions, wherein the O3concentration was maintained at 35 mg/min, the carrier filling rate was kept at 5 %, pH was held at 7, and aeration was kept at 0.6 L/min, the degradation efficiencies for COD, BOD, and TOC reached 80.7 %, 91.6 %, and 84.6 %, respectively. When compared with the ICOP (intimate coupling of ozone oxidation and photocatalysis) procedure, the ICOPB demonstrates a superior removal efficiency and more comprehensive mineralization. Microbial diversity results indicated thatProteobacteriaactively contribute to the subsequent biodegradation of CMP wastewater treated with the ICOPB system. As revealed by the GC–MS analysis and toxicity assessments of intermediate products, ICOPB notably amplified the rate of organic matter degradation and concurrently reduced the toxicity of the effluents. In conclusion, the findings of this research offer an innovative method for the effective degradation of CMP wastewater, thereby addressing a significant environmental concern in the pulp and paper industry.