Acetic acid inhibition on methanogens in a two-phase anaerobic process

Xiao, Keke; Guo, Chenghong; Zhou, Yan; Maspolim, Yogananda; Wang, J. Y.; Ng, Wun Jern

doi:10.1016/j.bej.2013.03.011

Cited by 60 publications

(32 citation statements)

References 31 publications

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“…2b). The latter was because of the presence of acidogenic methanogens in the acidogenic reactor (Xiao et al, 2013;Maspolim et al, 2014). It may be also not related with HPr accumulation (1014 mg HPr L À1 ) either.…”

Section: Biomass Activity In the Acidogenic Reactormentioning

confidence: 91%

“…Method for VFAs determination can be found in Xiao et al (2013). VSS and VS tests were followed the standard method (APHA, 2005).…”

Section: Methodsmentioning

confidence: 99%

“…R1 (6 L) was the feed tank while the hydrolytic/acidogenic and methanogenic reactors were R2 (8 L) and R3 (45 L), respectively. Operating parameters for this system had been described in Xiao et al (2013). Briefly, HRT for the acidogenic and methanogenic reactors were 3 d and 17 d, respectively.…”

Section: The Two-phase Cstr Anaerobic Systemmentioning

confidence: 99%

“…The pretreatment methods to remove residual VFAs from the biomass were described in Xiao et al (2013). Briefly, residual VFAs were removed by incubating (overnight) or centrifugation (12 857Âg, 10 min) the biomass.…”

Section: Experimental Set-up: Hpr Degradation and Atp Of The Acidogenmentioning

confidence: 99%

“…The different operating pH and hydraulic retention time (HRT) in the acidogenic and methanogenic reactors may result in different microbial communities. Xiao et al (2013) had reported the degradation of HAc by methanogens in the acidogenic and methanogenic reactors of a two-phase anaerobic system. Kim et al (2002) had reported HPr removal in single-stage and daily fed-batch twophase continuous stirred tank reactor (CSTR) systems.…”

Section: Introductionmentioning

confidence: 99%

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Dynamics of propionic acid degradation in a two-phase anaerobic system

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Section: Biomass Activity In the Acidogenic Reactormentioning

confidence: 91%

“…Method for VFAs determination can be found in Xiao et al (2013). VSS and VS tests were followed the standard method (APHA, 2005).…”

Section: Methodsmentioning

confidence: 99%

Section: The Two-phase Cstr Anaerobic Systemmentioning

confidence: 99%

Section: Experimental Set-up: Hpr Degradation and Atp Of The Acidogenmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Open‐Source Anaerobic Digestion Modeling Platform, Anaerobic Digestion Model No. 1 Fast (ADM1F)

Zhu,

Zhang,

Jafarov

et al. 2024

Biotech & Bioengineering

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An open‐source modeling platform, called Anaerobic Digestion Model No. 1 Fast (ADM1F), is introduced to achieve fast and numerically stable simulations of anaerobic digestion processes. ADM1F is compatible with an iPython interface to facilitate model configuration, simulation, data analysis, and visualization. Faster simulations and more stable results are accomplished by implementing an advanced open‐source library of numerical methods called Portable Extensive Toolkit for Scientific Computation (PETSc) to solve the ADM1 system of equations. Leveraging PETSc, ADM1F can consistently complete a steady‐state simulation under 0.2 s, over 99% faster than a benchmark ADM1 model implemented with MATLAB while achieving agreement of model outputs within 1% of those obtained with the benchmark model. For dynamic simulations, however, ADM1F has a computational speed advantage only when the influent characteristics update more frequently than every 4 h. The ability of ADM1F to be useful as a tool to study anaerobic digestion systems is demonstrated through two example implementations of ADM1F: (1) a two‐phase co‐digestion scenario evaluating the impact of the organic loading rate and the substrate composition on reactor performance and stability, and (2) a conventional digester scenario assessing the effectiveness of recovery strategies after disruptions that led to instability. These examples demonstrate how the high simulation speed and the convenience of the iPython interface allow ADM1F to complete complex analyses within minutes, much faster than computational strategies currently reported in the literature.

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Modified anaerobic digestion model No.1 (ADM1) for modeling anaerobic digestion process at different ammonium concentrations

Yang

Liu

et al. 2019

Water Environment Research

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Anaerobic digestion (AD) is an established method for sustainable energy production. Anaerobic digestion model No.1 (ADM1) was used to simulate methane production (MP) and volatile fatty acid (VFA) concentrations at different ammonium concentrations. In accordance with the incomplete description of several biochemical reactions and the omission of several reaction processes, ADM1 was modified with the consideration of acetic acid inhibition and valeric acid existence. ADM1_ac (ADM1 added acetic acid inhibition) could obtain better simulation accuracy of MP (goodness‐of‐fit value = 0.945), and VFA concentrations (goodness‐of‐fit values > 0.39) were all higher than ADM1_original, but cannot explain the valeric acid production. ADM1_va (ADM1 added valeric acid existence) could achieve better simulation of valeric acid (achieving a breakthrough of zero), nevertheless the accuracy of propionic and butyric acids was poorer than ADM1_ac with differences between experimental and simulation values were 5%–10% lower. With both factors coordinated, MP and VFA concentrations could be simulated accurately by ADM1_ac_va (ADM1 added acetic acid inhibition and valeric acid existence), with the highest goodness‐of‐fit values (>0.85). The results of a verification experiment with ADM1_ac_va simulation further indicated that acetic acid inhibition and valeric acid as new component were both important in ADM1. Practitioner points ADM1_ac could simulate MP and acetate, propionate and butyrate concentrations better. ADM1_va could explain the valerate production during AD of glucose. ADM1_ac_va could simulate AD process quite accurately, with the highest goodness‐of‐fit values (>0.85). Acetate inhibition and valerate existence were both important and should be considered in ADM1.

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Acetic acid inhibition on methanogens in a two-phase anaerobic process

Cited by 60 publications

References 31 publications

Dynamics of propionic acid degradation in a two-phase anaerobic system

Dynamics of propionic acid degradation in a two-phase anaerobic system

Open‐Source Anaerobic Digestion Modeling Platform, Anaerobic Digestion Model No. 1 Fast (ADM1F)

Modified anaerobic digestion model No.1 (ADM1) for modeling anaerobic digestion process at different ammonium concentrations

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