Accumulation of propionic acid during anaerobic treatment of distillery wastewater from barley-Shochu making

Kida, Kenji; Morimura, Shigeru; Sonoda, Yorikazu

doi:10.1016/0922-338x(93)90118-r

Cited by 55 publications

(11 citation statements)

References 8 publications

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“…The ethanol concentration was measured by gas chromatography (GC) (GC353B, GL Sciences, Tokyo, Japan) , and the lactic acid concentration was measured by high‐performance liquid chromatography (Shimadzu, Kyoto, Japan) , with an ultraviolet–visible detector (SPD‐10AV) and a Shimpack SCR‐101H column. The concentrations of the flavour compounds were measured by the internal standard method (with n ‐butyl acetate) using a GC system (GC353B; GL Science, Tokyo, Japan) equipped with a flame ionization detector and an InertCap Pure Wax capillary column (30 m × 0.25 mm i.d., 0.25 μm d.f.…”

Section: Methodsmentioning

confidence: 99%

Development of a process for producing ethyl caproate- and ethyl lactate-rich riceshochu

Yuan

Luo

et al. 2015

J. Inst. Brew.

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To increase the popularity of rice shochu, a process was developed to produce ethyl caproate-and ethyl lactate-rich rice shochu. On a laboratory-scale, there was a shochu production trial with Saccharomyces cerevisiae Y-E. Caproic acid added in the secondstage fermentation was esterified to ethyl caproate. Both ethyl caproate and ethyl lactate were produced by adding a caproic acid-producing bacterial (CAPB) consortium and lactic acid bacterium (LAB) to the shochu production process. Yellow koji was more appropriate for producing a flavour-rich shochu with the addition of a CAPB consortium and LAB than white koji. Optimal addition time for the CAPB consortium and LAB was on the first day of the second-stage fermentation, judging from concentrations of ethyl caproate and ethyl lactate produced. Additional dosages of CAPB consortium and LAB positively affected the formation of ethyl caproate and ethyl lactate, respectively. Shochu production with the addition of 2% and 4% CAPB consortium led to ethyl caproate concentrations of 27.3 mg/L and 47.9 mg/L in genshu, respectively, and the shochu achieved the best sensory test score from the Japanese shochu brewery panellists.

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Section: Methodsmentioning

confidence: 99%

Development of a process for producing ethyl caproate- and ethyl lactate-rich riceshochu

Yuan

Luo

et al. 2015

J. Inst. Brew.

Self Cite

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show abstract

“…Improved process design has the potential to simultaneously increase biogas generation and volatile solids (VS) destruction while reducing the build-up of intermediates like propionate, which can be detrimental to digester performance (McCarty and Smith, 1986;Smith, 1990;Kida et al, 1993;McInerney et al, 2009;Wong et al, 2009). However, a lack of understanding regarding the relationship between process configuration and digester function is a challenge to process improvement.…”

Section: Introductionmentioning

confidence: 97%

Little Bugs Matter Big Time: How Staged Anaerobic Digestion Increases Methanogenic Activity and Alters Microbial Community Structure

Bocher¹,

Zitomer²

2012

proc water environ fed

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Single-stage and two-stage anaerobic digesters treating synthetic primary sludge were operated for over 300 days and compared with respect to methanogen community structure and digester function. Community structure was characterized using banding pattern intensities from denaturing gradient gel electrophoresis (DGGE) for the mcrA gene of methanogenic Archaea. Function was described using specific methanogenic activity (SMA). All digesters were seeded with the same biomass, but different methanogen communities developed over time in the staged and unstaged digesters. Compared to a single-stage CSTR, staging increased the SMA by 41, 26, and 57% with propionate, acetate, and hydrogen, respectively. Additionally, the staged digester produced 10% more methane and achieved 10% greater volatile solids (VS) destruction. Process configuration shifted the methanogen community structure, and this impacted digester function.

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“…A balanced relationship among the microorganisms performing these three reactions is essential for proper digester function. Due to this inherent complexity, propionate degradation is often considered to be a rate-limiting step of the anaerobic digestion (AD) process (Kida et al, 1993;McInerney et al, 2008;Wong et al, 2009). volatile fatty acids (VFAs) (McCarty and Smith, 1986;Smith and McCarty, 1990).…”

Section: Introductionmentioning

confidence: 99%

Bioaugmentation Can Increase Steady-State Methane Production and COD Reduction in Anaerobic Digesters

Venkiteshwaran¹,

Seib²,

Bocher³

et al. 2012

proc water environ fed

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Bioaugmentation was investigated to improve anaerobic digesters at steady state. Two digester sets (Sets A and B), were seeded with different inocula and operated (HRT = 10 days, OLR = 4 g-COD/L R -day). Bioaugmented digesters received 50 mg-VSS/L R -day of an active culture enriched for H 2 /CO 2 and propionate utilization. The bioaugmented Set-A digesters showed a significant increase in methane production and COD reduction, whereas Set-B digesters did not. The specific methanogenic activity (SMA) of seed used to start Set-A was lower than that used to start Set-B. In addition, initial SMA screening of each inocula mixed with enrichment culture indicated Set-A inoculum would benefit from bioaugmentation, whereas Set-B would not. Therefore, low SMA may indicate that bioaugmentation is beneficial and initial SMA screening can predict bioaugmentation outcomes. In conclusion, bioaugmentation can result in higher methane production and lower effluent COD at steady state; however, success depends on the initial digester methanogenic community.

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Accumulation of propionic acid during anaerobic treatment of distillery wastewater from barley-Shochu making

Cited by 55 publications

References 8 publications

Development of a process for producing ethyl caproate- and ethyl lactate-rich riceshochu

Development of a process for producing ethyl caproate- and ethyl lactate-rich riceshochu

Little Bugs Matter Big Time: How Staged Anaerobic Digestion Increases Methanogenic Activity and Alters Microbial Community Structure

Bioaugmentation Can Increase Steady-State Methane Production and COD Reduction in Anaerobic Digesters

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