Oct 4, 2019 · Fermentation occurs in certain types of bacteria and fungi that require an oxygen-free environment to live (known as obligate anaerobes), in facultative anaerobes such as yeast, and also in muscle cells when oxygen is in short supply (as in strenuous exercise). The processes of fermentation are valuable to the food and beverage industries, with
Sep 15, 2023 · Enhanced anaerobic fermentation of waste activated sludge by reverse osmosis brine and composition distribution in fermentative liquid
Fermentation products are considered waste products, since they cannot be metabolized further without the use of oxygen. [citation needed] Fermentation normally occurs in an anaerobic environment. In the presence of O 2, NADH, and pyruvate are used to generate adenosine triphosphate (ATP) in respiration. This is called oxidative phosphorylation
May 15, 2024 · Hence, anaerobic fermentation, which could convert FW into high-value products (e.g., short-chain fatty acids (SCFAs)), might be a promising alternative to anaerobic digestion. The SCFAs as the important chemicals exhibits various industrial applications, such as textile, food, medicine, and petrochemical.
Another familiar fermentation process is alcohol fermentation, which produces ethanol. The ethanol fermentation reaction is shown in Figure 8.17 . In the first reaction, the enzyme pyruvate decarboxylase removes a carboxyl group from pyruvate, releasing CO 2 gas while producing the two-carbon molecule acetaldehyde.
Acidogenic fermentation is an emerging biotechnology that utilizes food waste as a substrate to produce high-value products such as short-chain fatty acids (SCFAs), offering a sustainable solution by combining waste management with resource recovery.
May 1, 2024 · Peracetic acid (PAA) combined with free ammonia (FA) pretreatment can be utilized to promote anaerobic fermentation (AF) of waste activated sludge (WAS) to produce short-chain fatty acids (SCFAs), and the resulting SCFAs are desirable carbon sources (C-sources) for polyhydroxyalkanoate (PHA) biosynthesis.
The production of short-chain fatty acids (SCFAs) is constrained by substrate availability and the increased fractional pressure of H 2 emitted by acidogenic/fermentative bacteria during anaerobic fermentation of waste activated sludge (WAS).
ABSTRACT: LanzaTech has developed novel microbial bioreactor systems capable of direct gas fermentation to produce ethanol from carbon-containing gases. In this study, a life-cycle assessment
Dec 15, 2023 · The results of nitrogen compound transition during the fermentation period were summarized in Fig. 1 a, c, e.The values of NO 3 −-N in three groups all experienced obvious decline in the first 5 days, descending from 32.6, 36.0, 31.2 mg·L −1 to 5.8, 16.5, 13.3 mg·L −1 in BG, BSG and BESG respectively (Fig. 1 a).
Nov 18, 2021 · Fermentation Definition. Fermentation is a metabolic process in organisms that converts carbohydrates into chemical energy, without requiring oxygen. In other words, it is an anaerobic process. In contrast, cellular respiration produces energy, but it is an aerobic process (requires oxygen). In addition to energy molecules (such as ATP
To break the bottlenecks of slow hydrolysis and low acid production efficiency of waste-activated sludge (WAS) in the traditional anaerobic fermentation process, this study investigated the employment of ferrous-iron (Fe(II))-activated sulfite to produce hydroxyl, sulfate, and other highly oxidizing radicals on WAS floc cracking and short-chain fatty acid (SCFAs) production during anaerobic
Nov 25, 2015 · A wide range of value-added by-products can be potentially produced from waste activated sludge (WAS) through anaerobic fermentation, among which short-chain fatty acids (SCFAs) are versatile green chemicals, but the conversion yield of SCFAs is usually constrained by the low carbon-to-nitrogen ratio of the original WAS.
Oct 1, 2012 · The primary aim of this project is to explore the method of anaerobic fermentation for the efficient utilization of the waste generated by the food industry. This waste is a mixture of organic residues, which tends to result in fermentation process failures due to variations in waste composition and nutrition.
May 8, 2024 · fermentation, chemical process by which molecules such as glucose are broken down anaerobically. More broadly, fermentation is the foaming that occurs during the manufacture of wine and beer, a process at least 10,000 years old. The frothing results from the evolution of carbon dioxide gas, though this was not recognized until the 17th century.
