Nutrient removal efficacy and microbial dynamics in constructed wetlands using Fe(III)-mineral substrates for low carbon–nitrogen ratio sewage treatment
Bioprocess and Biosystems Engineering(2024)
Abstract
This study evaluated the roles of two common sources of Fe(III)-minerals—volcanic rock (VR) and synthetic banded iron formations from waste iron tailings (BIF-W)—in vertical flow-constructed wetlands (VFCWs). The evaluation was conducted in the absence of critical environmental factors, including Fe(II), Fe(III), and soil organic matter (SOM), using metagenomic analysis and integrated correlation networks to predict nitrogen removal pathways. Our findings revealed that Fe(III)-minerals enhanced metabolic activities and cellular processes related to carbohydrate decomposition, thereby increasing the average COD removal rates by 10.7
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Key words
Fe (III)-minerals,Vertical flow-constructed wetlands,Metagenomic analysis,Integrated correlation networks,Simultaneous partial nitrification,ANAMMOX,Denitrification
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