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Exploring Resistomes and Microbiomes in Pilot-scale Microalgae-bacteria Wastewater Treatment Systems for Use in Low-resource Settings by Julián O. Ovis-Sánchez; Victor D. Perera-Pérez; Germán Buitrón; Marcos Quintela-Baluja; David W. Graham; Rosario Morales-Espinosa; Julián Carrillo-Reyes is a Environmental Science article available to read on EtoBox.

What is Exploring Resistomes and Microbiomes in Pilot-scale Microalgae-bacteria Wastewater Treatment Systems for Use in Low-resource Settings about?

Antibiotic resistance genes (ARGs) released into the environment are an emerging human and environmental health concern, including ARGs spread in wastewater treatment effluents. In low-to-middle income countries (LMICs), an alternate wastewater treatment option instead of conventional systems are low-energy, high-rate algal ponds (HRAP) that use microalgae-bacteria aggregates (MABA) for waste degradation. Here we studied the robustness of ARG removal in MABA-based pilot-scale outdoor systems for 140 days of continuous operation. The HRAP system successfully removed 73 to 88 % chemical oxygen demand and up to 97.4 % ammonia, with aggregate size increasing over operating time. Fourteen ARG classes were identified in the HRAP influent, MABA, and effluent using metagenomics, with the HRAP process reducing total ARG abundances by up to 5-fold from influent to effluent. Parallel qPCR analyses showed the HRAP system significantly reduced exemplar ARGs (p < 0.05), with 1.2 to 4.9, 2.7 to 6.3, 0 to 1.5, and 1.2 to 4.8 log-removals for sul1, tetQ, bla KPC, and intl1 genes, respectively. Sequencing of influent, effluent and MABAs samples showed associated microbial communities differed signif

Who reads Exploring Resistomes and Microbiomes in Pilot-scale Microalgae-bacteria Wastewater Treatment Systems for Use in Low-resource Settings?

Author

Julián O. Ovis-Sánchez; Victor D. Perera-Pérez; Germán Buitrón; Marcos Quintela-Baluja; David W. Graham; Rosario Morales-Espinosa; Julián Carrillo-Reyes

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Environmental Science (Physical Sciences)