Bioprocess and Biosystems Engineering
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Simulation of wastewater treatment by aerobic granules in a sequencing batch reactor based on cellular automata
Bioprocess and Biosystems Engineering - Tập 37 - Trang 2049-2059 - 2014
In the present paper, aerobic granules were developed in a sequencing batch reactor (SBR) using synthetic wastewater, and 81 % of granular rate was obtained after 15-day cultivation. Aerobic granules have a 96 % BOD removal to the wastewater, and the reactor harbors a mount of biomass including bacteria, fungi and protozoa. In view of the complexity of kinetic behaviors of sludge and biological me......
Hydrogen production by immobilized Chlorella vulgaris: optimizing pH, carbon source and light
Bioprocess and Biosystems Engineering - Tập 36 - Trang 867-872 - 2012
The effects of light, pH and organic carbon sources were investigated on hydrogen production by algae. An optical fiber was examined as an internal light source. The optical fiber rendered prolonged lag time and total time of hydrogen production. The optimal pH to produce hydrogen for Chlorella sp. was 8.0. Glucose, fructose, sucrose and malt extract were compared as organic carbon sources. The op......
Conversion of paper sludge to ethanol in a semicontinuous solids-fed reactor
Bioprocess and Biosystems Engineering - Tập 26 - Trang 93-101 - 2003
Conversion of paper sludge to ethanol was investigated with the objective of operating under conditions approaching those expected of an industrial process. Major components of the bleached Kraft sludge studied were glucan (62 wt.%, dry basis), xylan (11.5%), and minerals (17%). Complete recovery of glucose during compositional analysis required two acid hydrolysis treatments rather than one. To a......
Immobilization of microbial protease on vermiculite
Bioprocess and Biosystems Engineering - Tập 8 - Trang 33-38 - 1992
Vermiculite, an inert and cheap solid support material, was used in the immobilization of protease by adsorption. Adsorption of protease on vermiculite saturated with potassium, calcium and aluminium was studied. Aluminium saturated vermiculite adsorbed maximum amount of enzyme at pH 6.5. The maximum adsorption of enzyme on cationic vermiculite occurred within one hour at 30°C. When the temperatur......
Cold stress combined with salt or abscisic acid supplementation enhances lipogenesis and carotenogenesis in Phaeodactylum tricornutum (Bacillariophyceae)
Bioprocess and Biosystems Engineering - - 2022
Compounds from microalgae such as ω3-fatty acids or carotenoid are commercially exploited within the pharmacology, nutraceutical, or cosmetic sectors. The co-stimulation of several compounds of interest may improve the cost-effectiveness of microalgal biorefinery pipelines. This study focussed on Phaeodactylum tricornutum to investigate the effects on lipogenesis and carotenogenesis of combined st......
A kinetic study on carboxylic acids production using bovine slaughterhouse wastewater: a promising substrate for resource recovery in biotechnological processes
Bioprocess and Biosystems Engineering - Tập 44 - Trang 271-282 - 2020
Carboxylic acids (CA) are considered high added-value compounds, and their production from wastes has gained economic and environmental notoriety. However, the CA production and kinetic modeling using some agro-industrial wastewaters, such as bovine slaughterhouse wastewater (SHW), are not well reported in the literature. Therefore, the objective of this work was to evaluate the CA production pote......
An ambient water loop system for USP purified water
Bioprocess and Biosystems Engineering - Tập 17 Số 5 - Trang 277-286 - 1997
An ambient loop USP purified water system has been designed and implemented using carbon and ion exchange resin beds, ultraviolet light systems and polishing filters to produce water consistently meeting or exceeding all USP XXIII quality specifications for purified water. The circulation system is constructed of PVDF plastic piping material installed in a continuous fully-drainable loop. The syst......
A one dimensional moving bed biofilm reactor model for nitrification of municipal wastewaters
Bioprocess and Biosystems Engineering - Tập 40 - Trang 1141-1149 - 2017
This work presents a one-dimensional model of a moving bed bioreactor (MBBR) process designed for the removal of nitrogen from raw wastewaters. A comprehensive experimental strategy was deployed at a semi-industrial pilot-scale plant fed with a municipal wastewater operated at 10–12 °C, and surface loading rates of 1–2 g filtered COD/m2 d and 0.4–0.55 g NH4-N/m2 d. Data were collected on influent/......
Influence of a propeller on Saccharomyces cerevisiae fermentations in a pilot scale airlift bioreactor
Bioprocess and Biosystems Engineering - Tập 16 - Trang 273-281 - 1997
The hydrodynamics (sectional gas holdup and liquid velocities) and oxygen transfer performance of a conventionally operated multiconfigurable pilot scale (0.25 m3) concentric airlift bioreactor containing baker's yeast were significantly improved by operating a marine propeller to draw liquid down the draft tube and aid recirculation at the base of the vessel. Propeller operation reduced the sever......
Distribution of sulfonamides in liquid and solid anaerobic digestates: effects of hydraulic retention time and swine manure to rice straw ratio
Bioprocess and Biosystems Engineering - Tập 40 - Trang 319-330 - 2016
The effects of hydraulic retention time (20 and 15 days) and swine manure to rice straw ratios on distribution of sulfonamides (SAs) in liquid and solid anaerobic digestates were studied using bench-scale completely stirred tank reactors at (37 ± 1) °C. Results showed that anaerobic digestion (AD) treatment exhibited a good removal effect on sulfadiazine (SDZ), sulfadimidine (SM2) and sulfachlorop......
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