Physiology and kinetics of trimethylamine conversion by two methylotrophic strains in continuous cultivation systems

Roseiro, J. Carlos; Partidário, Paulo Jorge; Lobo, Noel; Marçal, M. J.

doi:10.1007/s002530051558

Cited by 12 publications

(2 citation statements)

References 18 publications

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“…Using the data collected at the different steady states, several metabolic parameters were calculated according to Roseiro et al , 39 but some additional parameters were also calculated using the following equations. Specific C-source consumption rate, q C-source (mmol C-source g DCW −1 h −1 ), was calculated through the eqn (1):where D : dilution rate (h −1 ), S : input C-source concentration (mmol L −1 ), S R : residual C-source concentration (mmol L −1 ), and X : bacterial biomass produced (g DCW L −1 ).…”

Section: Methodsmentioning

confidence: 99%

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A new impetus for biodesulfurization: bypassing sulfate inhibition in biocatalyst production

2023

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

A new impetus for biodesulfurization: bypassing sulfate inhibition in biocatalyst production

2023

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The use of multi‐parameter flow cytometry to study the impact of limiting substrate, agitation intensity, and dilution rate on cell aggregation during Bacillus licheniformis CCMI 1034 aerobic continuous culture fermentations

Silva

Reis

Kent

et al. 2005

Biotech & Bioengineering

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The main objective of this work was to establish those factors either physical (power input) or chemical (limiting substrate or dilution rate) that enhance cell aggregation (biofilm or floc formation) and cell physiological state during aerobic continuous cultures of Bacillus licheniformis. Glucose-limited steady-state continuous cultures growing at a dilution rate between 0.64 and 0.87/h and 1,000 rpm (mean specific energy dissipation rate (epsilonT) = 6.5 W/kg), led to the formation of a thin biofilm on the vessel wall characterized by the presence of a high proportion of healthy cells in the broth (after aggregate disruption by sonication) defined as having intact polarized cytoplasmic membranes. An increased epsilonT (from 6.5 W/kg to 38 W/kg) was found to hinder cell aggregation under carbon limitation. The carbon recovery calculated from glucose indicated that additional extracellular polymer was being produced at dilution rates >0.87/h. B. licheniformis growth under nitrogen limitation led to floc formation which increased in size with dilution rate. Counter-intuitively the flocs became more substantial with an increase in epsilonT from 6.5 W/kg to 38 W/kg under nitrogen limitation. Indeed the best culture conditions for enhanced metabolically active cell aggregate formation was under nitrogen limitation at epsilonT = 6.5 W/kg (leading to floc formation), and under carbon limitation at a dilution rate of between 0.64 and 0.87/h, at epsilonT = 6.5 W/kg (leading to vessel wall biofilm formation). This information could be used to optimize culture conditions for improved cell aggregation and hence biomass separation, during thermophilic aerobic bioremediation processes.

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Sustainable and continuous removal of trimethylamine in a bio‐photoelectrochemical reactor using g‐C₃N₄/TiO₂ photocathode with power generation

Han

Liu

2021

J of Chemical Tech & Biotech

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BACKGROUND: Trimethylamine (TMA), as a harmful nitrogenous gas, is potentially toxic to animals and human beings. In recent years, the emission of TMA has caused huge environmental problems. TMA is strongly toxic and carcinogenic and requires efficient treatment technology. Photocatalysis and photoelectrocatalysis (PEC) have attracted great interest because of their environmental friendliness and high efficiency. The key problem is how to construct high-efficiency systems and prepare high-activity catalysts.RESULTS: To eradicate TMA in air, an efficient electrochemical system with bio-anode and photocathode (g-C 3 N 4 -TiO 2 ) was designed. It removed TMA in air continuously and efficiently, for both single-cathode and double-cathode systems. This is the first report about TMA removal in such integrated g-C 3 N 4 /TiO 2 photocathode and bio-electrochemical system. Effects of reaction conditions were investigated, such as the TMA concentrations and flow rates. The highest efficiency for TMA removal was in an integrated PEC and microbial fuel cell (MFC) system with potassium persulfate (PS) activation. The double-cathode PEC-MFC-PS system could remove more TMA (1.9 g m −3 h −1 versus 1.3 g m −3 h −1 ) compared with the double-cathode PEC-MFC system. CONCLUSIONS: A novel TMA treatment system -PEC-MFC systemwas constructed, coupling PEC with MFC for continuous removal of TMA from air. Combined with activated PS, a PEC-MFC-PS system was designed and constructed and proved effective in oxidizing gaseous TMA and generating electricity at the same time, which has practical application prospects for the treatment of TMA pollution.

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Physiology and kinetics of trimethylamine conversion by two methylotrophic strains in continuous cultivation systems

Cited by 12 publications

References 18 publications

A new impetus for biodesulfurization: bypassing sulfate inhibition in biocatalyst production

A new impetus for biodesulfurization: bypassing sulfate inhibition in biocatalyst production

The use of multi‐parameter flow cytometry to study the impact of limiting substrate, agitation intensity, and dilution rate on cell aggregation during Bacillus licheniformis CCMI 1034 aerobic continuous culture fermentations

Sustainable and continuous removal of trimethylamine in a bio‐photoelectrochemical reactor using g‐C₃N₄/TiO₂ photocathode with power generation

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Physiology and kinetics of trimethylamine conversion by two methylotrophic strains in continuous cultivation systems

Cited by 12 publications

References 18 publications

A new impetus for biodesulfurization: bypassing sulfate inhibition in biocatalyst production

A new impetus for biodesulfurization: bypassing sulfate inhibition in biocatalyst production

The use of multi‐parameter flow cytometry to study the impact of limiting substrate, agitation intensity, and dilution rate on cell aggregation during Bacillus licheniformis CCMI 1034 aerobic continuous culture fermentations

Sustainable and continuous removal of trimethylamine in a bio‐photoelectrochemical reactor using g‐C3N4/TiO2 photocathode with power generation

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Sustainable and continuous removal of trimethylamine in a bio‐photoelectrochemical reactor using g‐C₃N₄/TiO₂ photocathode with power generation