Cai Yuxuan, Huang Shaozhe, Xiong Jianhua
School of Resources, Environment and Materials, Guangxi University, Nanning 530004, China.
Guangxi Key Laboratory of Emerging Contaminants Monitoring, Early Warning and Environmental Health Risk Assessment, Nanning 530004, China.
Polymers (Basel). 2024 May 9;16(10):1329. doi: 10.3390/polym16101329.
Old Corrugated Container (OCC) pulping wastewater has a complex organic composition and high levels of biotoxicity. The presence of dissolved and colloidal substances (DCSs) is a major limiting factor for pulp and paper companies to achieve closed-water recycling. In order to solve this problem, the coupled ozone-catalyzed oxidation and biodegradation (OCB) method was used to treat OCC pulping wastewater in this study. A polyurethane sponge was used as the basic skeleton, loaded with nano TiO and microorganisms, respectively, and then put into a reactor. After an 8-min ozone-catalyzed oxidation reaction, a 10-h biological reaction was carried out. The process was effective in removing organic pollutants such as COD and BOD from OCC paper whitewater. The removal rates of COD and BOD were 81.5% and 85.1%, respectively. By using the polyurethane sponge to construct a microenvironment suitable for microbial growth and metabolism, this study successfully applied and optimized engineered bacteria-white rut fungi (WRF)-in the system to achieve practical degradation of OCC pulping wastewater. Meanwhile, the biocompatibility of different microbial communities on the polyurethane sponge was analyzed by examining the degradation performance of OCC pulping wastewater. The structure of microbial communities loaded on the polyurethane sponge was analyzed to understand the degradation mechanism and microbial reaction behavior. White-rot fungi () contributed more to the degradation of OCC wastewater, and new strains adapted to OCC wastewater degradation were generated.
废旧瓦楞纸箱（OCC）制浆废水具有复杂的有机成分和较高的生物毒性。溶解和胶体物质（DCSs）的存在是制浆造纸企业实现水封闭循环利用的主要限制因素。为了解决这一问题，本研究采用臭氧催化氧化与生物降解耦合（OCB）方法处理OCC制浆废水。以聚氨酯海绵为基本骨架，分别负载纳米TiO和微生物，然后放入反应器中。经过8分钟的臭氧催化氧化反应后，进行10小时的生物反应。该工艺能有效去除OCC造纸白水等有机污染物，COD和BOD的去除率分别为81.5%和85.1%。本研究通过利用聚氨酯海绵构建适合微生物生长和代谢的微环境，成功地在系统中应用并优化了工程菌-白腐真菌（WRF），以实现对OCC制浆废水的实际降解。同时，通过考察OCC制浆废水的降解性能，分析了聚氨酯海绵上不同微生物群落的生物相容性。分析了负载在聚氨酯海绵上的微生物群落结构，以了解降解机理和微生物反应行为。白腐真菌对OCC废水的降解贡献更大，并产生了适应OCC废水降解的新菌株。
