Key Laboratory of Integrated Regulation and Resources Development of Shallow Lakes, Hohai University, Nanjing, 210098, China; College of Environment, Hohai University, Nanjing, 210098, China.
Key Laboratory of Integrated Regulation and Resources Development of Shallow Lakes, Hohai University, Nanjing, 210098, China; College of Environment, Hohai University, Nanjing, 210098, China.
J Environ Manage. 2019 May 15;238:263-273. doi: 10.1016/j.jenvman.2019.03.012. Epub 2019 Mar 7.
The performance of anaerobic membrane bioreactor (AnMBR) was evaluated treating synthetic wastewater with various concentrations of NaCl (0-40 g/L), as well as the recovery phase. The effluent COD removal efficiency decreased from 96.4% to 95.0%, 91.4%, 86.7% and 77.7% with stepwise increasing of salt concentration from 0 to 5, 10, 20 and 40 g NaCl/L, respectively, then gradually increased to 94.1% during the recovery phase. Additionally, the significant changes in the content and composition of soluble microbial products (SMP) and extracellular polymer substance (EPS) were obtained under higher salt stress. GC-MS analyses were carried out for the effluent, and some new types of compounds, such as Dodecane, Undecane, and Ethyl Acetate, were found during salt exposure phases. The characterization of the microbial community was also investigated based on the analysis of genomic 16S rDNA, revealing the increasing salinity (5-40 g NaCl/L) could reduce the diversity of sludge microbial community in AnMBR. Meanwhile, the significant effects on the composition of dominate phyla (Proteobacteria, Bacteroidetes, Firmicutes and Chloroflexi) were found during the salt exposure phase.
考察了厌氧膜生物反应器（AnMBR）在不同浓度 NaCl（0-40g/L）的合成废水中的处理性能，以及恢复阶段的性能。随着盐浓度从 0 逐渐增加到 5、10、20 和 40g NaCl/L，出水 COD 去除效率逐渐从 96.4%下降到 95.0%、91.4%、86.7%和 77.7%，然后在恢复阶段逐渐增加到 94.1%。此外，在较高盐胁迫下，可获得可溶性微生物产物（SMP）和胞外聚合物物质（EPS）含量和组成的显著变化。对出水进行 GC-MS 分析，在盐暴露阶段发现了一些新类型的化合物，如十二烷、十一烷和乙酸乙酯。还基于基因组 16S rDNA 分析对微生物群落进行了表征，结果表明，随着盐度的增加（5-40g NaCl/L），AnMBR 中污泥微生物群落的多样性降低。同时，在盐暴露阶段发现对优势门（变形菌门、拟杆菌门、厚壁菌门和绿弯菌门）的组成有显著影响。
