Chen You-Yuan, Wu Ya-Dong, Sun Ping, Wu Dan
Key Laboratory of Marine Environmental Science and Ecology, Ministry of Education; Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering, College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China.
Urban Planning Bureau Qingdao, Qingdao 266000, China.
Huan Jing Ke Xue. 2017 Jul 8;38(7):2850-2858. doi: 10.13227/j.hjkx.201610128.
In order to study the purifying effect of combined floating bed constucted by salinity plant and microorganisms on the slightly salt-alkaline water, blank floating bed A, floating bed B, microbes floating bed C and + microorganisms combined floating bed D were established, and slightly salt-alkaline eutrophic water body (pH 8.5-9.0, salinity 5‰-7‰) was purified under continuous flow conditions in the laboratory. Results showed that the removal rates of total nitrogen, total phosphorus, permanganate index by floating bed were 32.5%, 14.3% and 28.2%, respectively. And the removal rates of total nitrogen, total phosphorus and permanganate index by + microorganisms combined floating bed D which installed artificial medium with microorganisms reached 70.5%, 34.7% and 70.8%, respectively, of which the removal rates of total nitrogen, total phosphorus and permanganate index by microbial units were 37.7%, 21.6% and 44.5%, respectively. Synergies removal rates of nitrate nitrogen and total nitrogen by + microorganisms combined floating bed were 12.2% and 0.3%, but there was no synergy in the process of removing ammonia nitrogen, total phosphorus and permanganate index, which indicated that the synergies of and microorganisms in the combined floating bed were suppressed in slightly salt-alkaline environment. The high-throughput sequencing technique was adopted to analyze the microbial community in the floating bed C and D, which indicated that the abundance and diversity of microbial community in the combined floating bed were higher, and this was consistent with the result of the higher removal rate of the flotation bed D. Principal component analysis showed that the microbial degradation was a major factor in reducing the concentration of pollutants. This study provided a guide for the using of floating bed in purifying slightly salt-alkaline eutrophic water bodies in coastal area.
为研究盐生植物与微生物构建的组合浮床对微咸水的净化效果，设置了空白浮床A、浮床B、微生物浮床C和植物+微生物组合浮床D，在实验室连续流条件下对微咸水富营养化水体（pH 8.5 - 9.0，盐度5‰ - 7‰）进行净化。结果表明，浮床对总氮、总磷、高锰酸盐指数的去除率分别为32.5%、14.3%和28.2%。而安装了带微生物人工介质的植物+微生物组合浮床D对总氮、总磷和高锰酸盐指数的去除率分别达到70.5%、34.7%和70.8%，其中微生物单元对总氮、总磷和高锰酸盐指数的去除率分别为37.7%、21.6%和44.5%。植物+微生物组合浮床对硝酸盐氮和总氮的协同去除率分别为12.2%和0.3%，但在去除氨氮、总磷和高锰酸盐指数过程中不存在协同作用，这表明在微咸环境中组合浮床中植物与微生物的协同作用受到抑制。采用高通量测序技术分析浮床C和D中的微生物群落，结果表明组合浮床中微生物群落的丰度和多样性更高，这与浮床D去除率更高的结果一致。主成分分析表明微生物降解是降低污染物浓度的主要因素。本研究为利用浮床净化沿海地区微咸水富营养化水体提供了指导。
