AI Article Synopsis
- A study was conducted on a microalgae-bacteria system by co-culturing Chlorella sorokiniana with activated sludge, focusing on the removal of pollutants in wastewater.
- The system was highly effective, achieving nearly complete removal of ammonia nitrogen and around 65.3% and 42.6% removal of total nitrogen and phosphorus, respectively.
- The research highlighted the roles of specific bacteria and proteins in enhancing microalgal growth and promoting interactions that facilitate pollutant removal, providing new insights into wastewater treatment strategies.
Article Abstract
In this study, the microalgae-bacteria symbiosis (ABS) system by co-culturing Chlorella sorokiniana with activated sludge was constructed for pollutants removal, and the according interaction mechanism was investigated. The results showed that the ABS system could almost completely remove ammonia nitrogen, and the removal efficiency of total nitrogen and total phosphorus could accordingly reach up to 65.3 % and 42.6 %. Brevundimonas greatly promoted microalgal biomass growth (maximum chlorophyll-a concentration of 9.4 mg/L), and microalgae contributed to the increase in the abundance of Dokdonella and Thermomonas in ABS system, thus facilitating nitrogen removal. The extended Derjaguin-Landau-Verwey-Overbeek theory indicated a repulsive potential barrier of 561.7 KT, while tryptophan-like proteins and tyrosine-like proteins were key extracellular polymeric substances for the formation of flocs by microalgae and activated sludge. These findings provide an in-depth understanding of interaction mechanism between microalgae and activated sludge for the removal of contaminants from wastewater.
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| http://dx.doi.org/10.1016/j.biortech.2022.128574 | DOI Listing |
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