Extra benefit of microalgae in raw piggery wastewater treatment: pathogen reduction

• DOI: 10.1186/s40168-022-01339-3
• Publication Date: 2022-08-31T10:04:27Z
• Authors: Sang-Ah Lee; Minsik Kim; Hee-Sik Kim; Chi-Yong Ahn
• Keywords: Stenotrophomonas maltophilia; Arcobacter; Stenotrophomonas

Abstract Background Monitoring microbial communities especially focused on pathogens in newly developed wastewater treatment systems is recommended for public health. Thus, we investigated the community shift a pilot-scale microalgal system piggery wastewater. Results Microalgae showed reasonable removal efficiencies COD and ammonia, resulting higher transparency of final effluent. Metagenome diversity analyses that heterotrophic cultivation barely changed bacterial community; however, mixotrophic induced sudden change. In addition, an evaluation risk groups (RGs) bacteria raw included abundant pathogens, decreased RG2 by 63%. However, co-cultivation microalgae most dominant pathogen, Oligella , no direct effects between them. Conclusions interaction network was constructed to elucidate algae-bacteria interrelationships, decrease indirectly connected with growth via Brevundimonas Sphingopyxis Stenotrophomonas . validation test, 3 among 4 connecting strains exhibited inhibition zones against Therefore, causes bacteria, which indirect impact associated bacteria. Graphical