Process kinetics of UASB reactors treating non‐inhibitory substrate

Huang, Jow-Lay; Jih, Charng-Gwo; Lin, Shin-Dow; Ting, Wen-Huei

doi:10.1002/jctb.858

Cited by 16 publications

(5 citation statements)

References 21 publications

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“…The inhibitory effect of phenol on anaerobic bacteria in the UASB reactors can be reduced with recycling of the reactor‐effluent 3–5, 7. Nonetheless, phenol imposes a significant inhibitory effect on anaerobic bacteria in the UASB reactors if the phenol concentration in bulk liquid reaches approximately 500 mg dm −3 8…”

Section: Introductionmentioning

confidence: 99%

Temperature dependency of granule characteristics and kinetic behavior in UASB reactors

Chou

Huang

Hong

2004

J of Chemical Tech & Biotech

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When an inhibitory substrate, phenol, was treated under mesophilic conditions (25, 30, 35, and 40• C), the upflow anaerobic sludge bed (UASB) reactors at 30• C resulted in the greatest amount of biomass and the largest granule size, while the UASB reactors at 25• C resulted in the smallest granule size and the greatest amount of wash-out of sludge. The granule size tended to be negatively correlated with the amount of wash-out of sludge. With an increase in temperature, the kinetic constant k for anaerobic phenol degradation increased and the half saturation constant (K s ) decreased. The mass fraction of methanogens (f ) increased with increasing operational temperature in the UASB reactors and the activation energy (E a ) for acetate methanogenesis was larger than that for phenol acidogenesis in the batch reactors, indicating that the operational temperature imposes a more influential effect on methanogens than on acidogens. From the results of the activity of acidogens and methanogens (expressed in specific COD utilization rate), the rate-limiting step is phenol acidogenesis.

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Section: Introductionmentioning

confidence: 99%

Temperature dependency of granule characteristics and kinetic behavior in UASB reactors

Chou

Huang

Hong

2004

J of Chemical Tech & Biotech

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“…The substrate removal varied from 69 to 96 % for values of diffusion coefficient between 1E -8 m 2 h -1 and 3E -7 m 2 h -1 . According to Huang et al (2003) and Kalyuzhnyi et al (2001), the value of u Pmax is as high as 35 %. In the sensitivity analysis the value of u Pmax was varied between 18 and 40 %.…”

Section: Sensitivity Analysismentioning

confidence: 96%

A model to describe the performance of the UASB reactor

et al. 2013

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A model to describe the performance of the UASB reactor. Abstract A dynamic model to describe the performance of the Upflow Anaerobic Sludge Blanket (UASB) reactor was developed. It includes dispersion, advection, and reaction terms, as well as the resistances through which the substrate passes before its biotransformation. The UASB reactor is viewed as several continuous stirred tank reactors connected in series. The good agreement between experimental and simulated results shows that the model is able to predict the performance of the UASB reactor (i.e. substrate concentration, biomass concentration, granule size, and height of the sludge bed).

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“…The latter is the only technique that can predict the mixing behaviour instead of assuming it. Only some authors verified the hydraulic behaviour using tracer tests or measurements of concentration profiles in the specific modelled reactor (Huang et al, 2003, Lin andYang, 1995). No studies M A N U S C R I P T…”

Section: Liquid Phase Transportmentioning

confidence: 99%

Modelling anaerobic, aerobic and partial nitritation-anammox granular sludge reactors - A review

Baeten

Batstone

Schraa³

et al. 2019

Water Research

113

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Wastewater treatment processes with granular sludge are compact and are becoming increasingly popular. Interest has been accompanied by the development of mathematical models. This contribution simultaneously reviews available models in the scientific literature for anaerobic, aerobic and partial nitritation-anammox granular sludge reactors because they comprise common phenomena (e.g. liquid, gas and granule transport) and thus pose similar challenges. Many of the publications were found to have no clearly defined goal. The importance of a goal is stressed because it determines the appropriate model complexity and helps other potential users to find a suitable model in the vast amount of literature. Secondly, a wide variety was found in the model features. This review explains the chosen modelling assumptions based on the different reactor types and goals wherever possible, but some assumptions appeared to be habitual within fields of research, without clear reason. We therefore suggest further research to more clearly define the range of operational conditions and goals for which certain simplifying assumptions can be made, e.g. when intragranule solute transport can be lumped in apparent kinetics and when biofilm models are needed, which explicitly calculate substrate concentration gradients inside granules. Furthermore, research is needed to better mechanistically understand detachment, removal of influent particulate matter and changes in the mixing behaviour inside anaerobic systems, before these phenomena can be adequately incorporated in models. Finally, it is suggested to perform fullscale model validation studies for aerobic and anammox reactors. A spreadsheet in the supplementary information provides an overview of the features in the 167 reviewed models.

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Process kinetics of UASB reactors treating non‐inhibitory substrate

Cited by 16 publications

References 21 publications

Temperature dependency of granule characteristics and kinetic behavior in UASB reactors

Temperature dependency of granule characteristics and kinetic behavior in UASB reactors

A model to describe the performance of the UASB reactor

Modelling anaerobic, aerobic and partial nitritation-anammox granular sludge reactors - A review

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