ArticleFrontiers in bioengineering and biotechnology2026
Ecological assembly of activated sludge microbiomes under contrasting process configurations and influent regimes.
Article in Frontiers in bioengineering and biotechnology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Activated sludge microbial communities are central to pollutant removal and operational stability in petrochemical wastewater treatment plants (PWWTPs). However, in full-scale systems, the relative associations of process configuration and influent composition with microbial community organization and treatment performance remain difficult to disentangle. This study investigated four full-scale PWWTPs in Northeast China, including three oxic systems and one anoxic/oxic system receiving different proportions of petrochemical, mixed industrial, and domestic wastewater inputs. We combined 16S rRNA gene sequencing, phylogenetic bin-based null model analysis (iCAMP), and partial least squares path modeling (PLS-PM) to evaluate microbial community structure, inferred assembly patterns, and their associations with influent characteristics, effluent quality, and chemical oxygen demand (COD) removal. The oxic systems showed higher alpha diversity than the anoxic/oxic system, although this comparison was potentially influenced by differences in influent composition and site-specific operational conditions. Community composition differed among influent types, with Proteobacteria, Bacteroidota, Acidobacteriota, and Planctomycetota showing contrasting enrichment patterns. iCAMP indicated a predominance of stochastic assembly patterns in the oxic systems and deterministic assembly in the anoxic/oxic system. Core zOTUs, including members of Rhodocyclaceae, Pseudomonadaceae, and
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