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20231226053955.0 |
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231226s2023 xx |||||o 00| ||eng c |
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|a 10.1002/wer.10838
|2 doi
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|a pubmed24n1175.xml
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|a (NLM)36744534
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|a DE-627
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|e rakwb
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|a eng
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|a Liyun, Cai
|e verfasserin
|4 aut
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|a Influence of inoculation ratio on the performance and microbial community of bacterial-algal symbiotic system for rural wastewater treatment
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|c 2023
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|a Text
|b txt
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|a Date Completed 07.02.2023
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|a Date Revised 07.02.2023
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|a published: Print
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|a Citation Status MEDLINE
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|a © 2023 Water Environment Federation.
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|a In this study, co-culture of microalgae and activated sludge in photobioreactors (PBRs) was investigated at different inoculation ratios (0:1, 0.3:1, 0.7:1, and 1.3:1 sludge wt./algae wt.) for rural domestic wastewater treatment under direct solar radiation. Effluent qualities (such as pH, NO2 - , PO4 3- , and NH4 + -N concentrations) were assessed; bacterial and microalgal communities in co-culture system were compared. The microalgal and bacterial biomass fraction played a significant role in the performance and microbial community structure of the treatment system. In reactors with inoculation ratio of 0.3:1 and 0.7:1, the pH exceeded 9 or 10 under solar radiation, which led to some functional bacteria being missing. In the reactor with inoculation ratio of 1.3:1, activated sludge effectively prevented excessive increase in pH in the reactor. Similar observations were made for reactors with inoculation ratios below 1.3:1 by adding sludge halfway through the process. The results show that activated sludge can inhibit excessive increase in pH caused by algal photosynthesis, maintain the activity of nitrite-oxidizing bacteria in PBR, and reduce algae loss with the effluent. PRACTITIONER POINTS: Appropriate fraction of activated sludge can effectively inhibit the excessive increase in pH caused by algal photosynthesis in PBR. Adding activated sludge could maintain the activity of nitrite-oxidizing bacteria in PBR, and reduce microalgae loss with the effluent. Considering the stability of operation and biodiversity in PBR, a 1.3:1 inoculation ratio of activated sludge and microalgae is preferred
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|a Journal Article
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|a co-culture of microalgae and activated sludge
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|a inoculation ratio
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|a photobioreactor
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|a wastewater treatment
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|a Sewage
|2 NLM
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|a Nitrites
|2 NLM
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|i Enthalten in
|t Water environment research : a research publication of the Water Environment Federation
|d 1998
|g 95(2023), 2 vom: 06., Seite e10838
|w (DE-627)NLM098214292
|x 1554-7531
|7 nnns
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|g volume:95
|g year:2023
|g number:2
|g day:06
|g pages:e10838
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|u http://dx.doi.org/10.1002/wer.10838
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