Low temperature Moving Bed Bioreactor denitrification as mitigation measure to reduce agricultural nitrate losses

Aken, Pieter Van; Lambert, Nico; Appels, Lise

doi:10.1016/j.scitotenv.2021.152110

Cited by 2 publications

(1 citation statement)

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“…The CW system design, temperature, and flow configuration were often identified as important factors affecting the treatment performance of CWs. Studies investigating the optimization of the designed and operational parameters have shown improved results. − However, the improvement in reliability and performance of CWs was often reflected in conventional water quality indices, and the underlying mechanisms are yet to be elucidated.…”

Section: Introductionmentioning

confidence: 99%

Changes in Stoichiometry of Carbon and Nitrogen Trigger Transition in the States of Aquatic Microbiota in Full-Scale Constructed Wetlands

Tong

Zhang

et al. 2022

ACS EST Water

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Constructed wetlands (CWs) are broadly adopted technology for ecosystem service and various types of wastewater treatment. However, their unstable and unpredictable performance hindered their application and promotion. Transitions in microbial community are strong indicators of treatment performance of CWs. The unstable treatment of perturbed CWs is reflected not only in water quality indices but also in altered aquatic microbial composition. A comprehensive analysis was performed to elucidate the multistable microbial communities and their relationship nutrient concentration. Changes in environmental gradients modulate the strength of microbiota feedbacks and, together with molecular ecological networks, provide positive feedbacks for the generation and maintenance of alternative states. The community succession responding to the concentration of carbon and nitrogen was manipulated by stochastic instead of deterministic processes. The relative abundance of stochastic processes increased from state A (73.34%) to state B (89.28%). Furthermore, the high proportion of stochastic events in microbial communities easily trigger the transition to alternative states. To summarize, this study proposes a better understanding of the hypothesis of alternative stable states in the response of ecosystems to nutrient concentration, which could provide a strategy for the stoichiometric regulation of carbon and nitrogen changes along from the inlet to outlet in CWs.

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Section: Introductionmentioning

confidence: 99%