Insights into simultaneous anammox and denitrification system with short-term pyridine exposure: Process capability, inhibition kinetics and metabolic pathways

Li, Shuhan; Zhou, Xin; Cao, Xiwei; Chen, Jiabo

doi:10.1007/s11783-021-1433-3

Cited by 16 publications

(3 citation statements)

References 45 publications

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“…By comparison, quinoline is much more toxic than caffeine on anammox activity. Li et al [30] investigated the effect of pyridine (that is also found in refractory coking wastewater) on anammox activity. They used a non-competitive model to explain anammox activity and reported the Ki of pyridine at 135.19 mg/L.…”

Section: Acute Effects Of Caffeine Dosing On Anammox Activitymentioning

confidence: 99%

Effects of Caffeine and COD from Coffee Wastewater on Anaerobic Ammonium Oxidation (Anammox) Activities

Wongphoom

Saleepochn

Noophan

et al. 2022

Water

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An anaerobic ammonium oxidation (anammox) process was employed to remove nitrogen from wastewater generated from a coffee brewing facility. The effects of caffeine and chemical oxygen demand (COD) in coffee wastewater on anammox activity were investigated. The anammox activity was inhibited in synthetic wastewater with a caffeine concentration greater than 350 mg/L. Daily additions of caffeine at 2.5 mg/L for 28 days to the same substrate did not inhibit anammox activity. However, daily additions of coffee wastewater with COD of ≥387 mg/L and caffeine at 2.5 mg/L significantly inhibited anammox activity. Because the pH was increased in the system, resulting in an increase in free ammonia (FA) concentration, one could postulate that FA is an inhibitor of anammox activity. Quantitative polymerase chain reaction (qPCR) analysis was employed to determine the populations of anammox and denitrifying bacteria. Coffee wastewater with bacterial COD to total nitrogen (bCOD:TN) ratios of 0.3–0.6:1 did not have any effect on the abundances of anammox and denitrifying bacteria. The results from this work suggest that biodegradable COD (bCOD) rather than total COD (TCOD) should be used for calculating the COD:TN ratio during the study of the effects of nitrogen removal from real wastewaters using the anammox process. A not-competitive model could fit the anammox inhibition with caffeine concentrations at 50–500 mg/L with maximum specific anammox activity (SAAmax) of 0.594 mg-N/mg-volatile suspended solids (VSS)/d and inhibitory constant (Ki) of 480.97 mg/L.

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Section: Acute Effects Of Caffeine Dosing On Anammox Activitymentioning

confidence: 99%

Effects of Caffeine and COD from Coffee Wastewater on Anaerobic Ammonium Oxidation (Anammox) Activities

Wongphoom

Saleepochn

Noophan

et al. 2022

Water

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“…Recently, the Anammox process was identified in denitrifying pilot plant reactor. Anammox is an innovative, promising, and low-cost alternative to traditional denitrification techniques [2,3]. Ammonium is transformed to nitrogen gas using the Anammox process, which uses nitrite as an electron acceptor.…”

Section: Introductionmentioning

confidence: 99%

“…When NO3 is used as an electron acceptor during the denitrification process, it inhibits NO2 reductase to diminish the generation of N2O, which is used to consume organic materials and release CO2 [8,9] In order to provide a low-oxygen environment for anammox, partial denitrification consumes dissolved oxygen (DO) while consuming organic matter [2] CO2 from denitrification is used as a carbon source for anammox. (3). Anammox eats the NO2 substrate, lessening the impact of NO2 buildup on denitrification and preventing further NO2 reduction to N2O.…”

Section: Introductionmentioning

confidence: 99%

Development of a high rate biological system (Anammox + phosporous) for the treatment of low strength wastewaters

Ramesh

Goel²,

Sudarsan³

et al. 2023

Environmental Chemistry and Ecotoxicology

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Optimizing nitrogenous organic wastewater treatment through integration of organic capture, anaerobic digestion, and anammox technologies: sustainability and challenges

Huang

Wang

Zhang

et al. 2023

Environ Sci Pollut Res

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Insights into simultaneous anammox and denitrification system with short-term pyridine exposure: Process capability, inhibition kinetics and metabolic pathways

Cited by 16 publications

References 45 publications

Effects of Caffeine and COD from Coffee Wastewater on Anaerobic Ammonium Oxidation (Anammox) Activities

Effects of Caffeine and COD from Coffee Wastewater on Anaerobic Ammonium Oxidation (Anammox) Activities

Development of a high rate biological system (Anammox + phosporous) for the treatment of low strength wastewaters

Optimizing nitrogenous organic wastewater treatment through integration of organic capture, anaerobic digestion, and anammox technologies: sustainability and challenges

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