Coupling of photocatalysis and biological treatment for elemental chlorine free bleaching wastewater: Application of factorial design methodology.
Coupling of photocatalysis and biological treatment for elemental chlorine free bleaching wastewater: Application of factorial design methodology.
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DOI：
10.1016/j.jenvman.2021.114111
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发表时间：
2021-11
影响因子：
8.7
通讯作者：
Yinna Liang;Qilin Feng;Jiaming Zhang;Chunlin Jiao;Jianhua Xiong;Shuangfei Wang;Qifeng Yang
中科院分区：
文献类型：
--
作者：
Yinna Liang;Qilin Feng;Jiaming Zhang;Chunlin Jiao;Jianhua Xiong;Shuangfei Wang;Qifeng Yang
本研究以TiO2/甘蔗渣纤维素复合材料为载体，以原毛毛菌混合活性污泥为生物源，构建了可见光诱导的紧密耦合光催化与生物降解（ICPB）技术。通过响应面设计评价ICPB对无氯元素（ECF）漂白废水的降解效果。然后对废水进行表征，包括可吸收有机卤素（AOX）、溶解性有机碳（DOC）、化学需氧量（COD）、色度、pH、悬浮物，并通过傅里叶变换红外光谱（FT-IR）分析废水中有机化合物的变化。在pH 7、载体填充率5%、曝气量2 L/min、反应时间7 h的最佳条件下，AOX、COD和DOC的降解效率分别为95%、91%和82%。反应后ICPB载体的X射线光电子能谱(XPS)结果与反应前几乎相同。分析了ICPB系统降解过程中的优势菌(Cuaneotrichosporon、Paenibacillus、Cellulonas、Phanerochaete、DeChlorbacter、Rhodotorula、Sphingobacter、Ruminiclostridium)的生物量及其活性，对废水有良好的降解效果。该研究为ECF漂白废水的降解提供了一种新方法，也为ICPB技术优化提供了新思路。
In this study, the visible-light-induced intimately coupled photocatalysis and biodegradation (ICPB) technology was fabricated using the TiO2/bagasse cellulose composite as the carrier andPhanerochaetemixed activated sludge as the biological source. The ICPB degradation effect of elemental chlorine free (ECF) bleaching wastewater was evaluated via the response surface design. Then, the wastewater was characterized, including absorbable organic halogen (AOX), dissolved organic carbon (DOC), chemical oxygen demand (COD), chroma, pH, suspended solids, and the organic compound changes in wastewater were analyzed by fourier transform infrared spectroscopy (FT-IR). Under the optimal conditions of pH 7, carrier filling rate of 5%, aeration rate of 2 L/min, and reaction time of 7 h, the degradation efficiencies of AOX, COD, and DOC were 95%, 91%, and 82%, respectively. The X-ray photoelectron spectroscopy (XPS) results of the ICPB carrier after the reaction were almost identical to those before the reaction. The biomass and its activity on the ICPB system were analyzed by the dominant bacteria during degradation (Curaneotrichosporon,Paenibacillus,Cellulonas,Phanerochaete,Dechlorobacter,Rhodotorula,Sphingobacterium, andRuminiclostridium), which had a good degradation effect on wastewater. This study affords a novel method for the degradation of ECF bleaching wastewater and a new idea for ICPB technology optimization.