May 3, 2017 · Abstract. Membrane bioreactor systems can enhance anaerobic lactic acid fermentation by reducing product inhibition, thus increasing productivity. In batch fermentations, the bioconversion of glucose is strongly inhibited in the presence of more than 100 g·L −1 lactic acid and is only possible when the product is simultaneously removed
Dec 15, 2017 · Anaerobic fermentation is mainly a biological process, with a variety of microorganisms such as Bacillus sp., Clostridium sp., and methanogenic Archaea involved. As an antibacterial agent, TCC might suppress the activities and growths of these microbes, which thereby affects the anaerobic fermentation process.
Sep 6, 2022 · This paper summarizes the hydrogen production of organic wastewater dark anaerobic fermentation technology. The current anaerobic fermentation hydrogen production systems and technologies are summarized and compared, and the factors and potential conditions that affect the performance of hydrogen production are discussed.
Feb 15, 2024 · So far, potential effects of BZC on waste activated sludge (WAS) anaerobic fermentation (AF) were seldom reported. Consequently, research based on AF should be conducted with the addition of BZC. WAS was the by-product of activated sludge process in WWTPs and the amount of it would increase with the rapid expansion of WWTPs ( Ding et al., 2022 ).
Dec 15, 2019 · Volume 167, 15 December 2019, 115109. Side-stream enhanced biological phosphorus removal (S2EBPR) process improves system performance - A full-scale comparative study. Author links open overlay panel. Dongqi Wang a b 1. , Nicholas B. Tooker b 1. , Varun Srinivasan b. , Guangyu Li b. , Loretta A. Fernandez b. , Peter Schauer c. , Adrienne Menniti c.
Apr 14, 2023 · The scale-up technology of anaerobic fermentation stirring equipment is worthy of attention. Computational fluid dynamics (CFD) simulations were used to study the scale-up of anaerobic fermentation mixing under different solid content conditions. The applicability of different scale-up criteria was analyzed by investigating the relative parameters, such as the blade tip speed and the Reynolds
To clarify these issues, a hydrogen fermenter was designed to reduce Cr (VI) at 55 °C with glucose as initial substrate. Results show that 100 mg/L Cr (VI) can be completely reduced (99.5%) to trivalent chromium (Cr (III) through chemical and biological reactions. Bio-reduction dominates Cr (VI) removal in a first-order exponential decay mode
Mar 11, 2024 · This study explores the mechanism of improving anaerobic fermentation performance of rice samples pretreated by cobalt-60 gamma irradiation through the influence on fermentation substrate, acidogenic phase and methanogenic phase.
Feb 15, 2022 · Besides, WAS anaerobic fermentation systems also contain a certain amount of sulfate, which derived from WAS catabolism or wastewater. Sulfate and other oxidation state sulfur species could be reduced to sulfide by SRBs using anaerobic fermentation intermediates (e.g., hydrogen, propionate, and acetate) as electron donors (Pathway-II, Fig. S1
Jul 1, 2023 · In addition, eight main sulfate reducing bacteria were detected in the two fermenters, and their abundances in the fermenter of 30 mg-SDBS/g TSS (0.51 %) were greater than those in the control (0.27 %) (Fig. 6 and Fig. S6). These suggested that the microbial community with 30 mg-SDBS/g TSS existence was shifted in the direction towards
Oct 1, 2001 · This study was conducted to investigate the performance of the upflow anaerobic sludge blanket (UASB) reactor treating leachate from acidogenic fermenter in the two-phase anaerobic digestion of food waste. The chemical oxygen demand (COD) removal efficiency was consistently over 96% up to the loading rates of 15.8 g COD/l d.
However, the effects and mechanisms of using sludge after anaerobic fermentation to remove Cr (VI) are unclear, such as the dominance of direct versus indirect biological reduction, the contribution of abiotic effects, and the influence of fermentation conditions. This paper compares Cr (VI) removal in fermented and unfermented sludges.
Jan 1, 2021 · To further improve the acetic acid production, a semi-continuous fermentation was performed by using the immobilization cells in the bubble column bioreactor, as shown in Fig. 3. The production of acetic acid increased fast in the first 5 days, with a space–time yield of 3.6 g·L −1 ·d −1 acetic acid on the fifth day.
Sep 27, 2017 · In the second step, the anaerobic fermentation of water-soluble hydrolysis products occurs and a mixture of different organic acids (mainly acetate, propionate, and n-butyrate), alcohols, carbon dioxide (CO 2), and hydrogen (H 2) is produced. Not always the fermentation products are the direct result of a linear degradation way.
May 23, 2024 · Impeller blades play an important role in reducing the size of air bubbles and distribute them uniformly into the fermentation media. Variable impellers are used in the fermenters and are classified as follows. Disc turbines; Variable pitch open turbine; 7. Sparger. A sparger is a system used for introducing sterile air to a fermentation vessel.
