光催化-生物膜耦合体系的构建及其处理ECF漂白废水的研究

Construction for Coupling System of Photocatalysis-microbial Film and Its Treatment for ECF Bleaching Wastewater

中文关键词:  ECF漂白废水  光催化耦合生物法  白腐菌  活性污泥  理化性能

Key Words:ECF bleaching wastewater  photocatalysis coupling biological method  white rot fungus  activated sludge  physicochemical properties

中文摘要:

      以蔗渣纤维素-TiO₂复合材料为载体，活性污泥混合白腐菌为生物种源，单独白腐菌和单独活性污泥为对照，在可见光下构建不同的光催化-生物膜耦合（ICPB）体系；探究不同ICPB体系在驯化过程中的理化特性和处理ECF漂白废水的效果。结果表明，活性污泥混合白腐菌构建的ICPB体系具有良好的理化特性，驯化完成后，混合液悬浮固体（MLSS）、污泥体积指数（SVI）和蛋白质/多糖（PN/PS）的值分别为6~8 g/L、60~85 mL/g和1.61，其对可吸附有机卤化物（AOX）、化学需氧量（COD_Cr）和溶解有机碳（DOC）的去除率分别为92%、77%和75%，优于单独白腐菌和单独活性污泥组。优势菌种的加入，有利于强化ICPB体系的降解效果，该研究为高效处理ECF漂白废水提供了一种新思路。

Abstract:

      In this study， the visible light-induced intimately coupled photocatalysis and biodegradation （ICPB） system was constructed by using bagasse cellulose/TiO₂ composite as carrier， white rot fungus mixed activated sludge as biological source， single white rot fungus and single activated sludge as controls， to explore the physical and chemical characteristics and wastewater treatment efficiency of different ICPB systems in the domestication process. The results showed that the ICPB system constructed by white rot fungus mixed with activated sludge had good physical and chemical properties， i.e.， the values of MLSS， SVI， and PN/PS after domestication were 6~8 g/L， 60~85 mL/g， and 1.61， respectively. The removal rates of AOX， COD_Cr， and DOC reached 92%， 77%， and 75%， which were higher than those of the controls. The addition of dominant bacteria is beneficial to enhance the degradation effect of ICPB system and this study provides a new idea for efficient treatment of ECF bleaching wastewater.