Start-up evaluations and biocarriers transfer from a trickling filter to a moving bed bioreactor for synthetic mariculture wastewater treatment
Start-up evaluations and biocarriers transfer from a trickling filter to a moving bed bioreactor for synthetic mariculture wastewater treatment
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用于合成海水养殖废水处理的启动评估和生物载体从滴滤器转移到移动床生物反应器
DOI：
10.1016/j.chemosphere.2018.11.166
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发表时间：
2019
期刊：
影响因子：
8.8
通讯作者：
Ye Zhangying
中科院分区：
文献类型：
--
作者：
Liu Dezhao;Li Changwei;Guo Henbo;Kong Xianwang;Lan Lihua;Xu Hong;Zhu Songming;Ye Zhangying
海水养殖废水受高盐度胁迫影响，硝化处理启动时间较长。本研究旨在验证与移动床生物反应器(MBBR)相比，滴滤池(TF)处理人工海水养殖废水的启动速度更快，并探讨将成熟的生物载体从TF转移到新型MBBR(TF-MBBR)的可行性。考察了该工艺的脱氮性能、生物膜物化性能和微生物群落。结果表明，尽管MBBR的微生物多样性更丰富，但TF的启动时间比MBBR快41d。与膜生物反应器相比，生物膜的粗糙度和蛋白质含量较低，粘附力和多糖含量较高。粘附力与粗糙度呈负相关(r=0.−0.630，p=0.069)。傅里叶变换红外光谱分析结果表明，酰胺II(1538 cm−1)和酰胺III(1243 cm−1)的透过率仅在TF中获得，这可能与启动速度较快有关。此外，新的MBBR与从TF转移的成熟生物载体一起培养，具有良好的硝化性能，没有滞后时间。有趣的是，转移作用增加了微生物的多样性，使生物膜的物理化学性质向MBBR转移。综上所述，本研究证实MBBR的硝化启动可以通过转铁蛋白和生物载体的转移来加速。
Mariculture wastewater treatment by nitrification requires a long start-up time due to high salinity stress. This study aimed to verify the faster start-up of a trickling filter (TF) compared to a moving bed bioreactor (MBBR) treating synthetic mariculture wastewater, and to investigate the feasibility of transferring mature biocarriers from the TF to a new MBBR (TF-MBBR). The nitrogen removal performance, biofilm physicochemical properties and microbial communities were investigated. The results obtained showed that, the TF started up 41 days faster than the MBBR, despite the richer microbial diversity in the latter. Lower biofilm roughness and protein content as well as higher adhesive force and polysaccharide content in the TF were obtained compared to the MBBR. Adhesive force was found to be negatively correlated with roughness (r= −0.630,p= 0.069). Transmittance assigned to amide II (1538 cm−1) and amid III (1243 cm−1) through Fourier transform infrared spectroscopy (FTIR) determination was only obtained in the TF, which was likely related to the faster start-up.NitrosomonasandNitrospirawere detected as the predominant nitrifiers in both reactors. In addition, the new MBBR, incubated with the mature biocarriers transferred from the TF, had a satisfactory nitrification performance with no lag time. Interestingly, the transfer action increased the microbial diversity and made the biofilm physicochemical characteristics shift toward those of the MBBR. Taken together, the study confirmed that MBBR nitrification start-up can be accelerated via TF and biocarrier transfer.