College of Environmental Science and Engineering, Hunan University, Changsha, 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, China.
College of Environmental Science and Engineering, Hunan University, Changsha, 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, China.
Water Res. 2020 May 15;175:115673. doi: 10.1016/j.watres.2020.115673. Epub 2020 Feb 28.
Due to the increase of emerging contaminants in water, how to use new treatment technology to make up for the defects of traditional wastewater treatment method has become one of the research hotspots at present. Intimate coupling of photocatalysis and biodegradation (ICPB) as a novel wastewater treatment method, which combines the advantages of biological treatment and photocatalytic reactions, has shown a great potential as a low-cost, environmental friendly and sustainable treatment technology. The system mainly consists of photocatalytic materials, porous carriers and biofilm. The key principle of ICPB is to transform bio-recalcitrant pollutants into biodegradable products by photocatalysis on the surface of porous carriers. The biodegradable products were mineralized simultaneously through the biofilm inside the carriers. Because of the protection of the carriers, the microorganism can remain active even under the UV-light, the mechanical force of water flow or the attack of free radicals. ICPB breaks the traditional concept that photocatalytic reaction and biodegradation must be separated in different reactors, improves the purification capacity of sewage and saves the cost. This review summarizes the recent advances of ICPB photocatalysts, carriers and biofilm being applied, and focuses on the mechanisms and reactor configurations which is particularly novel. Furthermore, the possible ongoing researches on ICPB are also put forward. This review will provide a valuable insight into the design and application of ICPB in environment and energy field.
由于水中新兴污染物的增加，如何利用新的处理技术来弥补传统废水处理方法的缺陷，已成为目前的研究热点之一。光催化与生物降解的紧密耦合（ICPB）作为一种新型的废水处理方法，结合了生物处理和光催化反应的优点，作为一种低成本、环保和可持续的处理技术，具有很大的潜力。该系统主要由光催化材料、多孔载体和生物膜组成。ICPB 的关键原理是通过多孔载体表面的光催化作用将生物难降解的污染物转化为可生物降解的产物。生物膜内部同时将可生物降解的产物矿化为无机物。由于载体的保护，即使在紫外光、水流的机械力或自由基的攻击下，微生物也能保持活性。ICPB 打破了光催化反应和生物降解必须在不同反应器中进行的传统观念，提高了污水的净化能力并降低了成本。本文综述了 ICPB 光催化剂、载体和生物膜的最新应用进展，重点介绍了特别新颖的机制和反应器结构。此外，还提出了 ICPB 可能正在进行的研究。本文综述将为 ICPB 在环境和能源领域的设计和应用提供有价值的见解。
