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首页> 外文期刊>Bioprocess and Biosystems Engineering >Impact of nitrite on aerobic phosphorus uptake by poly-phosphate accumulating organisms in enhanced biological phosphorus removal sludges
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Impact of nitrite on aerobic phosphorus uptake by poly-phosphate accumulating organisms in enhanced biological phosphorus removal sludges

机译：亚硝酸盐对增强型生物除磷污泥中聚磷酸盐累积生物吸收好氧性磷的影响

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摘要

Impact of nitrite on aerobic phosphorus (P) uptake of poly-phosphate accumulating organisms (PAOs) in three different enhanced biological phosphorus removal (EBPR) systems was investigated, i.e., the enriched PAOs culture fed with synthetic wastewater, the two lab-scale sequencing batch reactors (SBRs) treating domestic waste-water for nutrient removal through nitrite-pathway nitritation and nitrate-pathway nitrification, respectively. Fluorescence in situ hybridization results showed that PAOs in the three sludges accounted for 72, 7.6 and 6.5 % of bacteria, respectively. In the enriched PAOs culture, at free nitrous acid (FNA) concentration of 0.47 × 10~(-3) mg HNO_2-N/L, aerobic P-uptake and oxidation of intercellular poly-β-hydroxyalk-anoates were both inhibited. Denitrifying phosphorus removal under the aerobic conditions was observed, indicating the existence of PAOs using nitrite as electron acceptor in this culture. When the FNA concentration reached 2.25 × 10~(-3) mg HNO_2-N/L, denitrifying phosphorus removal was also inhibited. And the inhibition ceased once nitrite was exhausted. Corresponding to both SBRs treating domestic wastewater with nitritation and nitrification pathway, nitrite inhibition on aerobic P-uptake by PAOs did not occur even though FNA concentration reached 3 × 10~(-3) and 2.13 ×10~(-3) mg HNO_2-N/L, respectively. Therefore, PAOs taken from different EBPR activated sludges had different tolerance to nitrite.
机译：在三种不同的增强型生物除磷（EBPR）系统中，研究了亚硝酸盐对多磷酸盐累积生物（PAO）需氧磷（P）吸收的影响，即富集了合成废水的PAOs培养，两个实验室规模的测序分批反应器（SBR）分别通过亚硝酸盐途径硝化和硝酸盐途径硝化处理生活污水以去除营养。荧光原位杂交结果表明，三种污泥中的PAO分别占细菌的72％，7.6％和6.5％。在富PAOs培养中，当游离亚硝酸（FNA）浓度为0.47×10〜（-3）mg HNO_2-N / L时，有氧P吸收和细胞间聚-β-羟基烷酸的氧化均受到抑制。在好氧条件下观察到了反硝化除磷效果，表明在该培养物中存在以亚硝酸盐为电子受体的PAO。当FNA浓度达到2.25×10〜（-3）mg HNO_2-N / L时，反硝化除磷也受到抑制。一旦亚硝酸盐耗尽，抑制作用就停止了。两种SBR都通过硝化和硝化途径处理生活废水，即使FNA浓度达到3×10〜（-3）和2.13×10〜（-3）mg HNO_2-，亚硝酸盐也不会抑制PAO吸收好氧。 N / L。因此，取自不同EBPR活性污泥的PAO对亚硝酸盐的耐受性不同。

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  • 来源
    《Bioprocess and Biosystems Engineering》 |2014年第2期|277-287|共11页
  • 作者

    Wei Zeng; Boxiao Li; Yingying Yang; Xiangdong Wang; Lei Li; Yongzhen Peng;

  • 作者单位

    Key Laboratory of Beijing for Water Environment Recovery,Department of Environmental Engineering, Beijing University of Technology, Pingleyuan No. 100, Chaoyang District,Beijing 100124, China;

    Key Laboratory of Beijing for Water Environment Recovery,Department of Environmental Engineering, Beijing University of Technology, Pingleyuan No. 100, Chaoyang District,Beijing 100124, China;

    Key Laboratory of Beijing for Water Environment Recovery,Department of Environmental Engineering, Beijing University of Technology, Pingleyuan No. 100, Chaoyang District,Beijing 100124, China;

    Key Laboratory of Beijing for Water Environment Recovery,Department of Environmental Engineering, Beijing University of Technology, Pingleyuan No. 100, Chaoyang District,Beijing 100124, China;

    Key Laboratory of Beijing for Water Environment Recovery,Department of Environmental Engineering, Beijing University of Technology, Pingleyuan No. 100, Chaoyang District,Beijing 100124, China;

    Key Laboratory of Beijing for Water Environment Recovery,Department of Environmental Engineering, Beijing University of Technology, Pingleyuan No. 100, Chaoyang District,Beijing 100124, China;

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  • 关键词

    Phosphate accumulating organism; Nitrite; Free nitrous acid; Aerobic phosphorus uptake; Enhanced biological phosphorus removal;

    机译：磷酸盐积累生物;亚硝酸盐游离亚硝酸;有氧吸收磷;增强生物除磷;

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