Effect of carbon source and COD/NO3−–N ratio on anaerobic simultaneous denitrification and methanogenesis for high-strength wastewater treatment

Xie, Lin; Chen, Jinrong; Wang, Rui; Zhou, Qi

doi:10.1016/j.jbiosc.2012.01.007

Cited by 56 publications

(20 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Previous studies found that the removal efficiency of inorganic nitrogen decreased with an increase the amount of urea . Methanogens in CW occurred at a C/N ratio higher than 7 regardless of carbon sources . It was determined that the optimum C/N ratio is 5:1.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Impact of external carbon source addition on methane emissions from a vertical subsurface‐flow constructed wetland

Liu¹,

et al. 2019

Greenhouse Gases

View full text Add to dashboard Cite

In this study, different concentrations of urea (0, 12.1, 30, 45, 61 and 80 mmol·L−1) were added separately, as external carbon sources, to a two‐stage vertical subsurface‐flow constructed wetland (VSSF CW) where Cyperus alternifolius L. was planted, with the aim of understanding methane (CH4) emissions driven by urea. Results indicate that the average CH4 emissions from a two‐stage VSSF CW were 6.88, 7.11, 6.22, 7.45, 5.06 and 2.80 mol·m−2·day−1, corresponding to urea concentrations of 0, 12.1, 30, 45, 61 and 80 mmol·L−1 added in the VSSF CW, respectively. Urea as a carbon source had an average of 31.57% of influent total organic carbon (TOC). It was transformed into CH4‐C, of which CH4‐C/TOCinfluent may be be considered as an important component when anthropogenic methanogenesis from treatment wetlands was driven by carbon sources or carbon loading. Methane emissions were at their lowest when the C/N ratio was 5.89, at a urea concentration of 80 mmol·L−1. Principal component analysis (PCA) indicates that CH4 correlated positively with temperature and redox conditions (Eh). Methane emissions driven by urea in the two‐stage VSSF CW were found to be in accordance with the second‐rate dynamics kinetic model (kinetic constant = 22.94 mg CH4·h−1, R2 = 0.99), which can be considered as a high level of CH4 emissions. It indicates that external carbon sources can influence CH4 emissions from two‐stage VSSF CW significantly. © 2019 Society of Chemical Industry and John Wiley & Sons, Ltd.

show abstract

Section: Introductionmentioning

confidence: 99%

“…It was determined that the optimum C/N ratio is 5:1. At this ratio the VSSF CWs can achieve a relatively high biological nutrient removal efficiency and a low level of greenhouse gas emissions . However, to date, information regarding CH 4 emissions from CWs when using urea as a type of external carbon source has been little understood.…”

Section: Introductionmentioning

confidence: 99%

Impact of external carbon source addition on methane emissions from a vertical subsurface‐flow constructed wetland

Liu¹,

et al. 2019

Greenhouse Gases

View full text Add to dashboard Cite

show abstract

“…Synthetic wastewater contained sufficient alkalinity and trace elements that are presented in Table 1. Modified from [15] and [16].…”

Section: Synthetic Wastewater Preparationmentioning

confidence: 99%

A Novel Configuration Fluidized Bed Reactor for Nitrate Reduction and Low Strength Anaerobic Wastewater Treatment

Rungkitwatananukul¹,

Puprasert²,

Nomai³

et al. 2018

View full text Add to dashboard Cite

Abstract. In this research, hydrodynamic behaviour in a novel fluidized bed reactor (FBR) was studied using a residence time distribution (RTD) experiment. The RTD experimental result showed that the liquid flow pattern closely resembled plug flow behaviour. This research utilized the novel FBR under low hydraulic retention time (HRT) operation (without internal recirculation), and thus the novel FBR's performance should be further investigated. Two wastewater treatment applications were studied in this research. The first application was to use the novel FBR for denitrification at COD:NO3 .

show abstract

“…Se observa que la concentración de nitrógeno inorgánico total en el intervalo anóxico es en promedio 13 % menor que durante el intervalo aireación, lo que indica que la desnitrificación no es completa. La relación DQO/N en la alimentación del filtro durante la tercera etapa corresponde a un valor de 4.5, lo que implica una desnitrificación parcial por escasez de carbono [13]. Así mismo, la limitada desnitrificación pudo deberse a que en ciertos periodos la concentración de OD no estuvo dentro del rango entre 0.2 y 0.5 mg L −1 que, según la literatura, es el mejor rango para que ocurra desnitrificación [11] (ver Figura 7).…”

Section: Desnitrificaciónunclassified

“…Cuando esta relación se encuentra en un rango de 6 a 9 se observa desnitrificación, principalmente a través de la RDNA (Reducción Desasimilativa de Nitrato -Amonio) [13]. Sin embargo, estudios realizados por GhaniyariBenis et al han encontrado desnitrificación con relaciones de DQO/N − NO Los procesos de nitrificación y desnitrificación pueden operarse mediante cultivos mixtos de bacterias autótro-fas y heterótrofas en suspensión, bajo condiciones de operación aerobia y anóxicas [4].…”

Section: Introductionunclassified

Eliminación de nitrógeno y contaminación orgánica de agua residual industrial pretratada en lagunas anaeróbicas mediante un biofiltro de arena

Peñafiel

Moreno

Ochoa‐Herrera

2016

Av. Cienc. Ing. (Quito)

View full text Add to dashboard Cite

The present study reports the removal of chemical oxygen demand (COD) and nitrogen from palm oil mill effluent (POME) treated in an anaerobic wastewater treatment plant of a palm oil mill located in the province of Esmeraldas, Ecuador. The treated POME was purified in a laboratory system consisting of a sand biofilter where physical-mechanical (turbidity removal), biological aerobic (organic matter and nitrification removal) and anoxic (denitrification) processes took place. The purification system involved a sand biofilter that discharged into a vessel from where water was recirculated to the biofilter. The removal of organic matter and nitrification was achieved through aeration (8-12 h d −1 ), while denitrification occurred during the anoxic period (12-16 h d −1 ). The system was operated for 294 days and reached 41 to 85 % COD removal and 44 to 87 % ammonium removal. Furthermore, a 12 % reduction in the total inorganic nitrogen concentration was achieved after the anoxic period compared to the aerobic phase.Keywords. industrial wastewater, crude palm oil, sand biofilter, nitrification, denitrification, COD removal, ammonium removal, aerobic, anoxic. ResumenLa presente investigación trata sobre la eliminación de carga orgánica y nitrógeno del efluente tratado en lagunas anaeróbicas de una extractora de aceite crudo de palma africana, ubicada en la provincia de Esmeraldas, Ecuador. El efluente se purificó en un sistema de laboratorio que consiste en un biofiltro de arena, donde ocurren procesos mecánicos (remoción de la turbidez), biológicos aerobios (eliminación de materia orgánica y nitrificación) y anóxicos (desnitrificación). El sistema consiste en un biofiltro de flujo continuo que descarga a un recipiente de donde se recircula el agua al biofiltro. La remoción de materia orgánica y nitrificación se realizó en intervalos de aireación (8-12 h d −1 ), mientras que la desnitrificación ocurrió en el intervalo de no aireación (12-16 h d −1 ). El sistema operó durante 294 días y se logró una remoción de 41 a 85 % de la DQO y 44 a 87 % de amonio. Así mismo se obtuvo un 12 % de reducción en la concentración de nitrógeno inorgánico total después del intervalo de aireación en comparación con el de no aireación.

show abstract

Effect of carbon source and COD/NO3−–N ratio on anaerobic simultaneous denitrification and methanogenesis for high-strength wastewater treatment

Cited by 56 publications

References 20 publications

Impact of external carbon source addition on methane emissions from a vertical subsurface‐flow constructed wetland

Impact of external carbon source addition on methane emissions from a vertical subsurface‐flow constructed wetland

A Novel Configuration Fluidized Bed Reactor for Nitrate Reduction and Low Strength Anaerobic Wastewater Treatment

Eliminación de nitrógeno y contaminación orgánica de agua residual industrial pretratada en lagunas anaeróbicas mediante un biofiltro de arena

Contact Info

Product

Resources

About