Department of Environmental Science, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, People's Republic of China.
Environ Sci Pollut Res Int. 2020 Jun;27(17):21560-21569. doi: 10.1007/s11356-020-08290-6. Epub 2020 Apr 11.
To explore an effective approach of simultaneous nitrification and denitrification in wastewater with low C/N ratios, integrated packed bed bioreactors based on poly(3-hydroxybutyrate-hydroxyvalerate) (PHBV) with different dosing methods were designed. The removal efficiency of NH-N in bioreactor with aeration was 88.62%, and higher NO-N removal efficiency was observed in bioreactor filled with grainy PHBV (95.21%) than bioreactor filled with strip PHBV (93.34%). Microbial study indicated that microbes harboring amoA and nirS genes preferred to attach on the surface of ceramsite, and significant differences in microbial community compositions at phylum and genus levels were observed. To summarize, it is feasible to utilize grainy PHBV for simultaneous and efficient removal of NH-N and NO-N from wastewater with low C/N ratios.
为了探索低 C/N 比废水中同步硝化反硝化的有效方法，设计了基于聚（3-羟基丁酸酯-羟基戊酸酯）（PHBV）的集成填充床生物反应器，采用不同的投加方式。曝气生物反应器中 NH-N 的去除效率为 88.62%，而填充粒状 PHBV 的生物反应器（95.21%）的 NO-N 去除效率高于填充条状 PHBV 的生物反应器（93.34%）。微生物研究表明，含有 amoA 和 nirS 基因的微生物更喜欢附着在陶粒表面，并且在门和属水平上观察到微生物群落组成的显著差异。总之，利用粒状 PHBV 从低 C/N 比废水中同时高效去除 NH-N 和 NO-N 是可行的。
