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首页> 外文期刊>Bioresource Technology: Biomass, Bioenergy, Biowastes, Conversion Technologies, Biotransformations, Production Technologies >Effect of aquaculture salinity on nitrification and microbial community in moving bed bioreactors with immobilized microbial granules
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Effect of aquaculture salinity on nitrification and microbial community in moving bed bioreactors with immobilized microbial granules

机译：水产养殖盐度对固定化微生物颗粒移动床生物反应器中硝化和微生物群落的影响

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摘要

The novel immobilized microbial granules (IMG) shows a significant effect of nitrification for freshwater aquaculture. However, there is lack of evaluation study on the performance of nitrification at high salinity due to the concentration of recycled water or seawater utilization. A laboratory scale moving bed bioreactor (MBBR) with IMG was tested on recycled synthetic aquaculture wastewater for the nitrification at 2.5 mg/L NH3-N daily. The results indicated that IMG showed a high salinity tolerance and effectively converted ammonia to nitrate up to 92% at high salinity of 35.0 g/L NaCl. As salinity increased from near zero to 35.0 g/L, the microbial activity of nitrite oxidation bacteria (NOB) in the IMG decreased by 86.32%. The microbial community analysis indicated that salinity significantly influenced the community structure. It was found that Nitrosomonas sp. and Nitrospira sp. were the dominant genera for ammonia oxidation bacteria (AOB) and NOB respectively at different salinity levels.
机译：新型固定化的微生物颗粒（IMG）显示出淡水水产养殖的硝化效果。然而，由于再生水或海水利用浓度，缺乏对高盐度的硝化性能的评价研究。在每日2.5mg / L NH3-N的再生合成水产养殖废水上测试了具有IMG的实验室规模移动床生物反应器（MBBR）。结果表明，IMG显示出高盐度耐受性，并在高盐度为35.0g / L NaCl的高盐度下有效地转化为硝酸盐至92％。随着盐度从接近零增加到35.0g / L，IMG中亚硝酸盐氧化细菌（NOB）的微生物活性降低了86.32％。微生物群落分析表明盐度显着影响了社区结构。发现硝基菌菌。和nitrospira sp。是氨氧化细菌（AOB）和NOB分别在不同的盐度水平下的常量属。

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