Khin Khin Phyu
Impact of indigenous vs. cultivated microalgae strains on biomass accumulation, microbial community composition, and nutrient removal in algae-based dairy wastewater treatment
Phyu, Khin Khin; Zhi, Suli; Graham, David W.; Cao, Yuang; Xu, Xiaoyu; Liu, Jiahua; Wang, Han; Zhang, Keqiang
Authors
Suli Zhi
Dr David Graham david.w.graham@durham.ac.uk
Professor
Yuang Cao
Xiaoyu Xu
Jiahua Liu
Han Wang
Keqiang Zhang
Abstract
This study investigated the role of indigenous and cultivated microalgae in nutrient removal and biomass production in dairy wastewater, especially in microbial function change. Five indigenous and three cultured microalgal strains were grown in sterile and non-sterile dairy wastewater, and nutrient removal and biomass profiles were analysed. Results showed higher phosphorus removal (90.1 % vs. 81.8 %, p < 0.001) and biomass production (2.3 vs. 2.0 g/L, p < 0.001) in sterile wastewater, while nitrogen removal was higher in non-sterile wastewater (83.1 % vs. 77.5 %, p < 0.05). Indigenous strains grew more consistently in high-concentration wastewater, though not significantly different from cultured strains. Phycosphere bacteria communities were more closely associated with total nitrogen, total phosphorus, and pigment content, while free-living bacteria primarily dependent on chlorophyll a and extracellular polymeric substances (EPS). The nitrogen transforming function was enhanced in phycosphere. These findings provide insights for optimizing microalgal-based wastewater treatment, advancing sustainable dairy wastewater management.
Citation
Phyu, K. K., Zhi, S., Graham, D. W., Cao, Y., Xu, X., Liu, J., Wang, H., & Zhang, K. (2025). Impact of indigenous vs. cultivated microalgae strains on biomass accumulation, microbial community composition, and nutrient removal in algae-based dairy wastewater treatment. Bioresource Technology, 426, Article 132349. https://doi.org/10.1016/j.biortech.2025.132349
| Journal Article Type | Article |
|---|---|
| Acceptance Date | Mar 3, 2025 |
| Online Publication Date | Mar 4, 2025 |
| Publication Date | Jun 1, 2025 |
| Deposit Date | Mar 20, 2025 |
| Journal | Bioresource Technology |
| Print ISSN | 0960-8524 |
| Publisher | Elsevier |
| Peer Reviewed | Peer Reviewed |
| Volume | 426 |
| Article Number | 132349 |
| DOI | https://doi.org/10.1016/j.biortech.2025.132349 |
| Keywords | Biochemical composition, Nutrient removal efficiency, Anaerobic digestor effluent, Microbial distribution, Functional gene traits |
| Public URL | https://durham-repository.worktribe.com/output/3709448 |