Effects of the exogenous N-acylhomoserine lactones on the performances of microalgal-bacterial granular consortia

IF 3.6 4区环境科学与生态学 Q2 BIOCHEMISTRY & MOLECULAR BIOLOGY Environmental Pollutants and Bioavailability Pub Date : 2022-09-15 DOI:10.1080/26395940.2022.2123046

Wanlin Lyu, Shujia Zhang, Yijia Xie, Rongfan Chen, Xiaoling Hu, Bin Wang, Wenbin Guo, Hongyu Wang, Jie Xing, Daochun Zhou

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引用次数: 2

Abstract

ABSTRACT Chlorella sorokiniana, the dominant microalgal strain with fast growth rate and high nutrients’ adsorption rate, was selected from the mature MBGS system. After adding C6-HSL and 3-oxo-C12-HSL to the MBGS consortia formed by combining it with mature AGS, it could also be found that C6-HSL accelerated the denitrification rate and improved the removal rate of TIN and TP effectively. Besides, the promoting effect of C6-HSL was slightly higher than that of 3-oxo-C12-HSL. By adjusting the concentration of C6-HSL (5 × 10−9, 7.5 × 10−7 and 2.5 × 10−5mol/L), the results revealed that adding 5 × 10−9mol/L C6-HSL significantly improved the efficiency of nitrogen and phosphorus removal in MBGS consortia. However, adding higher concentration of C6-HSL (7.5 × 10−7mol/L) would lead to deterioration of TIN and COD degradation. The content of EPS secreted by bacteria was regulated by different concentrations of AHLs, and the PS/PN value decreased with the increasing trend of C6-HSL concentration. GRAPIHCAL ABSTRACT

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外源n -酰基高丝氨酸内酯对微藻-细菌颗粒菌群性能的影响

摘要从成熟的MBGS体系中筛选出生长速度快、营养物质吸附率高的优势微藻小球藻(Chlorella sorokiniana)。将C6-HSL和3-氧- c12 - hsl加入到与成熟AGS结合形成的MBGS联合体中，也可以发现C6-HSL有效地加快了反硝化速度，提高了TIN和TP的去除率。此外，C6-HSL的促进作用略高于3-oxo-C12-HSL。通过调整C6-HSL的浓度(5 × 10−9、7.5 × 10−7和2.5 × 10−5mol/L)，结果表明，添加5 × 10−9mol/L的C6-HSL显著提高了MBGS菌群的脱氮除磷效率。而C6-HSL浓度越高(7.5 × 10−7mol/L)， TIN和COD的降解效果越差。细菌分泌的EPS含量受不同浓度ahl的调控，PS/PN值随C6-HSL浓度的增加而降低。GRAPIHCAL文摘

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来源期刊

Environmental Pollutants and Bioavailability Chemical Engineering-Chemical Health and Safety

CiteScore

4.30

自引率

3.00%

发文量

审稿时长

13 weeks

期刊介绍： Environmental Pollutants & Bioavailability is a peer-reviewed open access forum for insights on the chemical aspects of pollutants in the environment and biota, and their impacts on the uptake of the substances by living organisms. Topics include the occurrence, distribution, transport, transformation, transfer, fate, and effects of environmental pollutants, as well as their impact on living organisms. Substances of interests include heavy metals, persistent organic pollutants, and emerging contaminants, such as engineered nanomaterials, as well as pharmaceuticals and personal-care products as pollutants.