The kinetics of nitrogen removal and biogas production in an anammox non-woven membrane reactor

Ni, Shou-Qing; Lee, Po‐Heng; Sung, Shihwu

doi:10.1016/j.biortech.2010.02.074

Cited by 54 publications

(30 citation statements)

References 20 publications

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“…The process kinetics involves operational and environmental factors affecting the substrate utilization rates. Through kinetic evaluation, it is possible to optimize the plant design and to predict the performance of treatment plants (Isik and Sponza, 2005;Ni et al, 2010). Apparently, simplified models with limited variables are considered to be suitable for practical applications compared with complicated ones which require numerous inputs and assumptions (Iza et al, 1991).…”

Section: Introductionmentioning

confidence: 99%

Kinetics of nitrogen removal in pilot-scale internal-loop airlift bio-particle reactor for simultaneous partial nitrification and anaerobic ammonia oxidation

Abbas

Wang

et al. 2015

Ecological Engineering

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Section: Introductionmentioning

confidence: 99%

Kinetics of nitrogen removal in pilot-scale internal-loop airlift bio-particle reactor for simultaneous partial nitrification and anaerobic ammonia oxidation

Abbas

Wang

et al. 2015

Ecological Engineering

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“…This indicates that the reactor has less tolerance to hydraulic shocks which resulted in deterioration of anammox activity. Ni et al (2010) also reported decline in nitrogen removal efficiency from 89.9 to 80.7 % with decrease in HRT from 2.9 to 0.6 days in anaerobic non-woven membrane bioreactor. In our study, it was also observed that beyond the HRT of 2 days, increase in NRE was marginal.…”

Section: Discussionmentioning

confidence: 87%

“…However, validation of the models revealed that Grau second-order model predicted effluent nitrogen concentration with least error. Various researchers (Ni et al 2010(Ni et al , 2012 have reported that both Grau second-order and modified Stover-Kincannon models could suitably predict substrate removal kinetics in anammox process. However, the degree of correlation varied in different studies.…”

Section: Discussionmentioning

confidence: 99%

“…(13) and (14), respectively. Ni et al (2010) also stated that this model is capable of predicting substrate removal in anammox process. The maximum total nitrogen removal rate in our study was found 1.30 kg N/m 3 day, which is 42 % of U max .…”

Section: Modelling Of Nitrogen Removal Kineticsmentioning

confidence: 96%

“…Although, substrate removal kinetics was studied in detail by many researchers, but little attention has been paid on kinetics of N 2 production except Ni et al (2010). They used Van der Meer's model (Van der Meer and Heertjes 1983) for prediction of N 2 in anammox non-woven membrane reactor, which was earlier used by many researchers for estimation of methane gas production in anaerobic reactors.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A new mathematical model for nitrogen gas production with special emphasis on the role of attached growth media in anammox hybrid reactor

Tomar

Gupta

2015

Appl Microbiol Biotechnol

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The present study emphasised on the development of new mathematical models based on mass balance and stoichiometry of nitrogen removal in anammox hybrid reactor (AHR). The performance of AHR at varying hydraulic retention times (HRTs) and nitrogen loading rates (NLRs) revealed that nitrogen removal efficiency (NRE) increases with increase in HRT and was found optimal (89 %) at HRT of 2 days. Mass balance of nitrogen revealed that major fraction (74.1 %) of input nitrogen is converted into N2 gas followed by 11.2 % utilised in biomass synthesis. Attached growth media (AGM) in AHR contributed to an additional 15.4 % ammonium removal and reduced the sludge washout rate by 29 %. This also enhanced the sludge retention capacity of AHR and thus minimised the formation of nitrate in the treated effluent, which is one of the bottlenecks of anammox process. Process kinetics was also studied using various mathematical models. The mass balance model derived from total nitrogen was found most precise and predicted N2 gas with least error (1.68 ± 4.44 %). Model validation for substrate removal kinetics dictated comparatively higher correlation for Grau second-order model (0.952) than modified Stover-Kincannon model (0.920). The study concluded that owing to features of high biomass retention, less nitrate formation and consistently higher nitrogen removal efficiency, this reactor configuration is techno-economically most efficient and viable. The study opens the door for researchers and scientists for pilot-scale testing of AHR leading to its wide industrial application.

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Ammonium removal from coking wastewater in a pilot‐scale two‐stage aerobic biofilm system: Biokinetic analysis

Zhou

Zhang

2016

Can J Chem Eng

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A novel four‐stage pilot‐scale anaerobic/anoxic/oxic/oxic (A2/O2) biofilm process was successfully developed to treat coking wastewater with high ammonium loading. In this study, three different dynamical models including the first‐order substrate removal model, the Monod‐biological contact oxidation (Monod‐BCO) model, and the modified Stover‐Kincannon model were particularly applied to analyze kinetics of ammonium removal in a two‐step aerobic stage. For the O1 reactor, all models were appropriate for describing ammonium removal and the correlation coefficients of first‐order substrate removal model, BCO model, and modified Stover‐Kincannon model were 0.8974, 0.9210, and 0.9726, respectively. The model verification indicated that the modified Stover‐Kincannon model was slightly more applicable to predict ammonium removal in the O1 reactor. It was demonstrated that the maximum removal rate of ammonium was 0.208 kg/(m3 · d) by the Stover‐Kincannon model. For the O2 reactor, the modified Stover‐Kincannon model turned out to be the best fitting kinetic model for ammonium removal compared to the first‐order substrate removal model (R2 = 0.1556) and Monod‐BCO model (R2 = 0.5022). The maximum ammonium conversion rate (Um2‐O2) by the modified Stover‐Kincannon model was 1.180 kg/(m3 · d), while saturation rate constant k3‐O2 was 1.221 kg/(m3 · d). Furthermore, the determination coefficient between measured and predicted values obtained by the modified Stover‐Kincannon model was quite high (R2 = 0.9788) in the O2 process and a lower average residual square (6.60 × 10−6) was also obtained. The results of kinetic studies by the Stover‐Kincannon model can predict ammonia removal efficiency well in two‐step aerobic biofilm reactors of a coking wastewater treatment combined system.

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The kinetics of nitrogen removal and biogas production in an anammox non-woven membrane reactor

Cited by 54 publications

References 20 publications

Kinetics of nitrogen removal in pilot-scale internal-loop airlift bio-particle reactor for simultaneous partial nitrification and anaerobic ammonia oxidation

Kinetics of nitrogen removal in pilot-scale internal-loop airlift bio-particle reactor for simultaneous partial nitrification and anaerobic ammonia oxidation

A new mathematical model for nitrogen gas production with special emphasis on the role of attached growth media in anammox hybrid reactor

Ammonium removal from coking wastewater in a pilot‐scale two‐stage aerobic biofilm system: Biokinetic analysis

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