Liu Wei, Niu Xiaojun, Chen Weiyi, An Shaorong, Sheng Hong
School of Environment and Energy, South China University of Technology, Guangzhou 510006, China; State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China.
School of Environment and Energy, South China University of Technology, Guangzhou 510006, China; State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou 510006, China; Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, Guangzhou 510640, China.
Chemosphere. 2017 Apr;173:172-179. doi: 10.1016/j.chemosphere.2017.01.006. Epub 2017 Jan 3.
Phosphine (PH) emission from conventional biological wastewater treatment is very inefficient (ng-μg m). In this work, we investigated the feasibility of promoting PH formation from inorganic phosphorus (IP) or organic phosphorus (OP) containing synthetic wastewater treatment by Microbial Electrolysis Cell (MEC) for the first time. Positive effect of applied potential on PH production was observed after methanogens was inhibited. The highest production of PH (1103.10 ± 72.02 ng m) was obtained in IP-fed MEC operated at -0.6 V, which was about 5-fold and 2-fold compared to that in open circuit experiment and OP-fed MEC, respectively. Meanwhile, PH formation corresponded positively with current density and alkaline phosphatase activity. This result showed that suitable potential could enhance the activity of relevant enzymes and boost the biosynthesis of PH. Bacterial communities analysis based on high-throughput sequencing revealed that applied potential was conductive to the enrichment of phosphate-reducing organisms in contrast to the control test. These results provide a new idea for resource utilization of phosphorus in wastewater.
传统生物废水处理中磷化氢（PH）的排放效率极低（纳克 - 微克/立方米）。在本研究中，我们首次探究了利用微生物电解池（MEC）从含无机磷（IP）或有机磷（OP）的合成废水处理中促进PH生成的可行性。在抑制产甲烷菌后，观察到施加电位对PH产生有积极影响。在以IP为原料、-0.6 V运行的MEC中，PH产量最高（1103.10 ± 72.02纳克/立方米），分别约为开路实验和以OP为原料的MEC中的5倍和2倍。同时，PH的生成与电流密度和碱性磷酸酶活性呈正相关。该结果表明，合适的电位可增强相关酶的活性并促进PH的生物合成。基于高通量测序的细菌群落分析表明，与对照试验相比，施加电位有利于富集磷酸盐还原菌。这些结果为废水中磷的资源利用提供了新思路。
