Department of Environmental Engineering, College of Life and Environmental Science, Shanghai Normal University, Shanghai, 200234, People's Republic of China.
Appl Microbiol Biotechnol. 2013 Dec;97(24):10555-61. doi: 10.1007/s00253-013-4804-2. Epub 2013 Mar 20.
Sequentially and intimately coupled photolysis with biodegradation were evaluated for their ability to accelerate quinoline-removal and quinoline-mineralization kinetics. UV photolysis sequentially coupled to biodegradation significantly improved biomass-growth kinetics, which could be represented well by the Aiba self-inhibition model: UV photolysis increased the maximum specific growth rate (μ max) by 15 %, and the inhibition constant (K SI) doubled. An internal loop photo-biodegradation reactor (ILPBR) was used to realize intimately coupled photolysis with biodegradation. The ILPBR was operated with batch experiments following three protocols: photolysis alone (P), biodegradation alone (B), and intimately coupled photolysis and biodegradation (P&B). For P&B, the maximum quinoline removal rate (r max) increased by 9 %, K SI increased by 17 %, and the half-maximum-rate concentration (K S) decreased by 55 %, compared to B; the composite result was a doubling of the quinoline-biodegradation rate for most of the concentration range tested. The degree of mineralization was increased by both forms of photolysis coupled to biodegradation, and the impact was greater for intimate coupling (18 % increase) than sequential coupling (5 %). The benefits of UV photolysis were greater with intimate coupling than with sequential coupling due to parallel transformation by biodegradation and photolysis.
连续且紧密耦合的光解与生物降解被评估其加速喹啉去除和矿化动力学的能力。光解与生物降解的顺序耦合显著改善了生物量生长动力学，可以很好地用 Aiba 自抑制模型来表示：光解将最大比生长速率（μmax）提高了 15%，抑制常数（KSI）增加了一倍。采用内部循环光生物降解反应器（ILPBR）实现了光解与生物降解的紧密耦合。ILPBR 采用三个方案进行批处理实验：单独光解（P）、单独生物降解（B）和光解与生物降解紧密耦合（P&B）。对于 P&B，与 B 相比，喹啉去除率（r max）最大增加了 9%，KSI 增加了 17%，半最大速率浓度（K S）降低了 55%；在大多数测试浓度范围内，喹啉生物降解速率提高了一倍。与生物降解耦合的两种形式的光解都增加了矿化程度，紧密耦合的影响更大（增加了 18%），而顺序耦合的影响较小（增加了 5%）。由于生物降解和光解的平行转化，与顺序耦合相比，紧密耦合的紫外光解的好处更大。
