Results 181 to 190 of about 8,986 (253)
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Kinetics of whey–lactose acidogenesis
Biotechnology and Bioengineering, 1989AbstractThe mixed‐culture anaerobic conversion of lactose to organic acids in a bench‐scale continuous‐flow stirredtank fermentor is considered. The major acidogenic end‐product distribution with respect to the dilution rate are presented. A Monod chemostat model is employed to describe a microbial growth, and the influence on pH of the estimated model
W S, Kissalita, K V, Lo, K L, Pinder
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Glucose-stimulated acidogenesis by Streptomyces peucetius
Canadian Journal of Microbiology, 1987Cultures of Streptomyces peucetius often were observed to divert spontaneously from the production of anthracycline antibiotics to the excretion of acidic metabolites, whether grown in a defined medium or a nutrient-rich medium. The predominant excreted acidic metabolites were determined by high-performance liquid chromatography to be pyruvate and 2 ...
M L, Dekleva, W R, Strohl
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Dynamic Modeling of the Acidogenesis Step in Hyperthermophilic Conditions
Waste and Biomass ValorizationHamza Berga +3 more
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Acidogenesis by Oral Streptococci at Different pH Values
Caries Research, 1989Streptococcus mutans is known to be one of the most cariogenic oral microorganisms. Recently, organisms classified as S. mutans have been shown to be genotypically heterogeneous and to form at least six separate species. In this study, differences in acid production between the mutans streptococci and Streptococcus sanguis were investigated at pH ...
J J, de Soet, F A, Toors, J, de Graaff
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Conversion of food waste into hydrogen by thermophilic acidogenesis
Biodegradation, 2005Conversion of food waste into hydrogen by thermophilic acidogenesis was investigated as a function of organic loading rate (OLR), hydraulic retention time (HRT) and pH in a continuous stirred tank reactor. In order to identify hydrogen-producing microorganisms, denaturing gradient gel electrophoresis (DGGE) of the polymerase chain reaction (PCR ...
Shin HS, Youn JH
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Enhancement of sludge granulation in hydrolytic acidogenesis by denitrification
Applied Microbiology and Biotechnology, 2015Acidogenesis is an important pretreatment process for various industrial wastewater treatments. Granular sludge is an efficient form of a microbial community in anaerobic methanogenic reactors, such as upflow anaerobic sludge blanket (UASB), but it is hard to develop in the acidogenic process due to the short hydraulic retention times (HRTs) of ...
Yang, Li +5 more
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Inhibition on Acidogenesis of Dairy Wastewater by Zinc and Copper
Environmental Technology, 2001Acidogenesis of dairy wastewater produced volatile fatty acids, mainly acetate and propionate, plus hydrogen as by-product. Zinc (Zn) inhibited acidogenesis at concentrations over 10 mg l(-1); but at 10 mg l(-1), or less, it enhanced acidogenesis slightly.
Fang, HHP, Yu, HQ
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Bioreactor design for acidogenesis process of palm oil mill effluent
Journal of Ecological EngineeringPalm oil mill effluent (POME) is waste that can be used to produce biogas. One of the stages in the production of biogas from POME is the acidogenesis stage, where the products resulting from hydrolysis are further degraded into more specific organic ...
A. S. Zusri +7 more
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Continuous lactose fermentation by Clostridium acetobutylicum – Assessment of acidogenesis kinetics
Bioresource Technology, 2011An assessment of the growth kinetics of acidogenic cells of Clostridium acetobutylicum DSM 792 is reported in the paper. Tests were carried out in a continuous stirred tank reactor under controlled conditions adopting a complex medium supplemented with lactose as carbon source to mimic cheese whey.
NAPOLI, FABIO +4 more
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Acidogenesis in the two‐phase anaerobic process
Journal of Environmental Science and Health . Part A: Environmental Science and Engineering, 1985Abstract A two‐phase anaerobic digestion system with a completely mixed acid reactor was studied using a 2 percent synthetic glucose substrate. The steady‐state performance of the acid phase was studied at pH 4.3 and a hydraulic retention time (HRT) of 4.5 hours for 117 days.
Dipak Roy, Lynn M. Jones
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