Anhui Provincial Key Laboratory of Environmental Pollution Control and Resource Reuse, Advanced Technology Institute of Green Building Research of Anhui Province, Anhui Jianzhu University, Hefei 230601, PR China; CAS Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei 230026, PR China.
Anhui Water Conservancy Technical College, Hefei 231603, PR China.
Bioresour Technol. 2023 Feb;370:128535. doi: 10.1016/j.biortech.2022.128535. Epub 2022 Dec 29.
The functional interaction between microorganisms is key in symbiotic microalga-bacteria systems; however, evaluations of fungi and pathogenic microorganisms are not clear. In this study, the roles of three groups (i.e., microalgae-activated sludge (MAS), Microalgae, and activated sludge) in pollutant removal and biomass recovery were comparatively studied. The data implied that microalgal assimilation and bacterial heterotrophic degradation were the major approaches for degradation of nutrients and organic matter, respectively. According to 16S rRNA and internal transcribed spacer sequencing, the relative abundance of Rhodotorula increased remarkably, favoring nutrient exchange between the microalgae and bacteria. The abundances of two types of pathogenic genes (human pathogens and animal parasites) were reduced in the MAS system. The oleic acid content in the MAS system (51.2 mg/g) was 1.7 times higher than that in the Microalgae system. The results can provide a basis for practical application and resource utilization of symbiotic microalgae-bacteria systems.
微生物之间的功能相互作用是共生微藻-细菌系统的关键；然而，真菌和病原微生物的评价尚不清楚。在这项研究中，比较了三组（即微藻-活性污泥（MAS）、微藻和活性污泥）在污染物去除和生物质回收方面的作用。数据表明，微藻的同化作用和细菌的异养降解分别是营养物质和有机物降解的主要途径。根据 16S rRNA 和内部转录间隔区测序，红酵母的相对丰度显著增加，有利于微藻和细菌之间的营养物质交换。MAS 系统中两种类型的致病基因（人类病原体和动物寄生虫）的丰度降低。MAS 系统中的油酸含量（51.2mg/g）比微藻系统高 1.7 倍。研究结果可为共生微藻-细菌系统的实际应用和资源利用提供依据。
