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Effects of various side stream phosphorus recovery volume on the performance and microbial structures of mainstream biological system
Environmental Technology ( IF 2.8 ) Pub Date : 2020-03-26 , DOI: 10.1080/09593330.2020.1736645
Xuehui Zu 1 , Jun Nan 1 , Li He 1 , Bohan Liu 1
Affiliation  

ABSTRACT

The effects of three side stream phosphorous recovery volume on the performance and microbial structure of biological phosphorous removal system were investigated. Results showed that the removal of COD and nitrogen had no significant impacts by side stream operation, but the removal of phosphorous were gradually enhanced with the increase in side stream volume (SSV). The secretion of extracellular polymeric substance (EPS) were variously promoted at the stripping period. However, with the increase in SSV, the inhibition on EPS and phosphorus-accumulating organisms (PAOs) phosphorous absorption were severe and the restoration were tougher. The high throughout 16S rRNA gene sequencing revealed the succession of microbial population were significantly effected by side stream operation. The relative abundances of PAOs reduced to 0.17%, 0.09% and 0.07% with 30%, 60% and 90% side stream operations, respectively. At the restoration period, the relative abundance could restore to 95.4%, 65% and 38% initial values, respectively. The relative abundances of glycogen-accumulating organisms were variously enhanced under various SSV conditions. In conclusion, at SSV of 60%, more abundant recovered phosphorous could be obtained and had slighter and reversible effects on activated sludges. The SSV of 60% was the applicable SSV for phosphorous recovery from the biological phosphorus removal system.



中文翻译:

不同侧流磷回收量对主流生物系统性能及微生物结构的影响

摘要

研究了三侧流除磷量对生物除磷系统性能和微生物结构的影响。结果表明,侧流操作对COD和氮的去除没有显着影响,但随着侧流体积(SSV)的增加,磷的去除逐渐增强。细胞外聚合物(EPS)的分泌在剥离期得到不同程度的促进。但随着SSV的增加,对EPS和聚磷生物(PAOs)磷吸收的抑制作用严重,恢复难度加大。16S rRNA基因测序的高通量揭示了微生物种群的演替受到侧流操作的显着影响。PAOs 的相对丰度分别降低到 0.17%、0.09% 和 0。07% 分别有 30%、60% 和 90% 的侧流操作。恢复期相对丰度分别恢复到初始值的95.4%、65%和38%。在各种 SSV 条件下,积累糖原的生物的相对丰度有不同程度的提高。总之,在 SSV 为 60% 时,可以获得更丰富的回收磷,并且对活性污泥的影响较小且可逆。60% 的 SSV 是从生物除磷系统中回收磷的适用 SSV。在 SSV 为 60% 时,可以获得更丰富的回收磷,并且对活性污泥的影响较小且可逆。60% 的 SSV 是从生物除磷系统中回收磷的适用 SSV。在 SSV 为 60% 时,可以获得更丰富的回收磷,并且对活性污泥的影响较小且可逆。60% 的 SSV 是从生物除磷系统中回收磷的适用 SSV。

更新日期:2020-03-26
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