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Thermophilic, anaerobic bacteria isolated from a deep

A borehole drilled to a total depth of 6779 m in granitic rock in Gravberg, Sweden, was sampled and examined for the presence of anaerobic, thermophilic, fermenting bacteria and sulfate-reducing bacteria. Growth in enrichment cultures was obtained only from water samples collected from a specific sampling depth in the borehole (3500 m).

Ecological and genomic profiling of anaerobic

Short-term incubation of microbial cells collected from the granitic groundwater with 13C-labeled methane also demonstrates that AOM is linked to microbial sulfate reduction.

Active ultramicrobacterial alteration of iron in granite

Aerobically a ferric gel is precipitated throughout the biofilm slime, which alters first to ferrihydrite and later to hematite. When anaerobic fermentation produces a reducing environment the iron is converted to the ferrous state which may then be precipitated as ferrous hydroxide, vivianite or siderite.

Anaerobic fermentation of waste activated sludge for

2021-1-1  Anaerobic fermentation is a promising technology that can be used to produce VFAs and biogas generation from WAS (Eggeman et al., 2005). Moreover, anaerobic fermentation of WAS can reduce the amount of sludge and also improves the efficiency of sewage nitrogen and phosphorus removals (Ye et al., 2020; Wang et al., 2020).

Determining the impacts of fermentative bacteria on

2012-11-28  In the present study, the main factors which govern the dissolution process of an alkaline silicate mineral (wollastonite, CaSiO3) in an anaerobic fermentation process were determined. Wollastonite dissolution kinetics was measured in a series of chemical batch experiments in order to be able to estimate the required amount of alkaline silicate that can neutralize the acidifying fermentation

Development of an anaerobic hydrogen and methane

2011-8-23  we have developed atwo-step anaerobic fermentation system for generating hydrogen and methane. Bio-hydrogen is produced in the initial fermentation step by thermophilic microbiota mainly consisting of Clostridium species. Then, residues such as organic acids are converted into bio-methane in the second methane fermentation step.

Determining the impacts of fermentative bacteria on

2012-11-28  For this to occur, the mineral needs to be first dissolved in an acidifying process such as the biological process of anaerobic fermentation. In the present study, the main factors which govern the dissolution process of an alkaline silicate mineral (wollastonite, CaSiO 3) in an anaerobic fermentation process were determined. Wollastonite dissolution kinetics was measured in a series of chemical

Influence of Co-substrates for the Methane Production

The final product of an anaerobic fermentation is biogas that is mainly composed of 48-65% methane and 36-41% carbon dioxide, and methane is physically characterized as taste-, color-, odorless and inflammable gas that has heat value of 35.800 kJ m –3 (Martins das Neves et al., 2009).

Effect of initial pH on the sludge fermentation

2020-6-2  NH 4 +-N is the nutrient for anaerobic fermentation microorganisms that neutralizes SCFA produced by anaerobic processes and has a buffering effect on the pH of the system. If the NH 4 + -N concentration is too high, it will inhibit the activity of methanogenic archaea and

Alcoholic Fermentation an overview ScienceDirect

Under anaerobic conditions, the pyruvate can be transformed to ethanol, where it first converts into a midway molecule called acetaldehyde, which further releases carbon dioxide, and acetaldehyde is converted into ethanol. In alcoholic fermentation, the electron acceptor called NAD + is reduced to form NADH. The exchange of electrons that occurs in the process helps to build ATP.

Active ultramicrobacterial alteration of iron in granite

When anaerobic fermentation produces a reducing environment the iron is converted to the ferrous state which may then be precipitated as ferrous hydroxide, vivianite or siderite. Since iron is widespread in the natural environment, these reactions could have important geochemical implications.

Anaerobic fermentation (Chapter 8) Prokaryotic

Chapter 8 Anaerobic fermentation. Byung Hong Kim, Korea Institute of Science and Technology, Seoul, Geoffrey Michael Gadd, University of Dundee; Fermentation of glycolate by a pure culture of a strictly anaerobic Gram-positive bacterium belonging to the family Lachnospiraceae.

Thermophilic, Anaerobic Bacteria Isolated from a Deep

Thermophilic, anaerobic bacteria isolated from a deep borehole in granite in Sweden ULRICH SZEWZYK*, REGINE SZEWZYK, AND THOR-AXEL STENSTROM Swedish Institute for Infectious Disease Control, Department of Water Microbiology, S-105 21 Stockholm, Sweden Communicated by Thomas Gold, November 22, 1993 ABSTRACT A borehole drilled to a total depth of

Comprehensive comparison of acidic and alkaline

2021-3-1  This study conducted a comprehensive comparison of acidic (R 5.0) and alkaline (R 10.0) anaerobic fermentations of waste activated sludge (WAS).The results showed that alkaline fermentation was able to increase biopolymer release and benefitted the production of volatile fatty acids (VFAs).

Development of an anaerobic hydrogen and methane

2011-8-23  we have developed atwo-step anaerobic fermentation system for generating hydrogen and methane. Bio-hydrogen is produced in the initial fermentation step by thermophilic microbiota mainly consisting of Clostridium species. Then, residues such as organic acids are converted into bio-methane in the second methane fermentation step.

Determining the impacts of fermentative bacteria on

2012-11-28  Silicate minerals can be a source of calcium and alkalinity, enabling CO2 sequestration in the form of carbonates. For this to occur, the mineral needs to be first dissolved in an acidifying process such as the biological process of anaerobic fermentation. In the present study, the main factors which govern the dissolution process of an alkaline silicate mineral (wollastonite, CaSiO3) in an

Method and device for anaerobic fermentation of

We claim: 1. Method for the anaerobic fermentation of solid organic substances in a reactor tank (1) in which there is a mixture of the solid organic substances and an anaerobic fluid, in which a layer of material (10) floating on an anaerobic methane-generating fluid is moved from a supply end (7) to a discharge end (14) of said reactor tank and a methane-forming reaction is induced in the

Influence of Co-substrates for the Methane Production

The final product of an anaerobic fermentation is biogas that is mainly composed of 48-65% methane and 36-41% carbon dioxide, and methane is physically characterized as taste-, color-, odorless and inflammable gas that has heat value of 35.800 kJ m –3 (Martins das Neves et al., 2009).

Tourmaline ceramic balls stimulate growth and

2007-8-20  In fermentation tests, S. cerevisiae was first grown in aerobic conditions with shaking for 24 h and then in anaerobic condition for fermentation for the next 48 h. At the end of a 72 h incubation, content of total carbohydrates remaining in the 50 ml medium were 1.56 ± 0.15, 0.68 ± 0.07, 0.78 ± 0.09 g for control, 6 g and 12 g tourmaline

陈 赟 -南京师范大学环境学院 Nanjing Normal University

2020-10-22  Yu, P.K. Lam, (2017) Selective co-production of acetate and methane from wastewater during mesophilic anaerobic fermentation under acidic pH conditions. Environmental Science: Water Research & Technology.

Thermophilic, Anaerobic Bacteria Isolated from a Deep

Thermophilic, anaerobic bacteria isolated from a deep borehole in granite in Sweden ULRICH SZEWZYK*, REGINE SZEWZYK, AND THOR-AXEL STENSTROM Swedish Institute for Infectious Disease Control, Department of Water Microbiology, S-105 21 Stockholm, Sweden Communicated by Thomas Gold, November 22, 1993 ABSTRACT A borehole drilled to a total depth of

Development of an anaerobic hydrogen and methane

2011-8-23  we have developed atwo-step anaerobic fermentation system for generating hydrogen and methane. Bio-hydrogen is produced in the initial fermentation step by thermophilic microbiota mainly consisting of Clostridium species. Then, residues such as organic acids are converted into bio-methane in the second methane fermentation step.

Micro-scale anaerobic digestion of point source

2008-12-27  Micro-scale anaerobic digestion of point source components of organic fraction of municipal solid waste H.N. Chanakyaa,*, Isha Sharmaa, T.V. Ramachandraa,b a Centre for Sustainable Technologies, (formerly ASTRA), Indian Institute of Science, Bangalore 560 012, India bCentre for Ecological Sciences, Indian Institute of Science, Bangalore 560 012, India

Method and device for anaerobic fermentation of

We claim: 1. Method for the anaerobic fermentation of solid organic substances in a reactor tank (1) in which there is a mixture of the solid organic substances and an anaerobic fluid, in which a layer of material (10) floating on an anaerobic methane-generating fluid is moved from a supply end (7) to a discharge end (14) of said reactor tank and a methane-forming reaction is induced in the

Responses of anaerobic rumen fungal diversity

2012-11-16  Introduction. The bovine rumen harbours complex anaerobic microbial communities (Russell and Rychlik 2001; Zoetendal et al. 2004).These communities are responsible for the hydrolysis of fibrous, cellulose-rich plant material to mono- and disaccharides, and their subsequent fermentation to short-chain fatty acids, including propionate, acetate, butyrate, lactate and succinate (Hobson and

De novo assembly and comparative transcriptome

2016-3-3  The phytoflagellated protozoan, Euglena gracilis, has been proposed as an attractive feedstock for the accumulation of valuable compounds such as β-1,3-glucan, also known as paramylon, and wax esters. The production of wax esters proceeds under anaerobic conditions, designated as wax ester fermentation. In spite of the importance and usefulness of Euglena, the genome and

Tourmaline ceramic balls stimulate growth and

2007-8-20  In fermentation tests, S. cerevisiae was first grown in aerobic conditions with shaking for 24 h and then in anaerobic condition for fermentation for the next 48 h. At the end of a 72 h incubation, content of total carbohydrates remaining in the 50 ml medium were 1.56 ± 0.15, 0.68 ± 0.07, 0.78 ± 0.09 g for control, 6 g and 12 g tourmaline

Fermentation Free Full-Text Influence of L

Under aerobic conditions, S. cerevisiae transforms furfural to furoic acid, while under anaerobic fermentation, the primary product is furfuryl alcohol . These detoxification processes lead to a lack of NADH, suggesting that furfural reduction competes for NADH and results in a decrease in cell growth and ethanol formation [25,26].

Coffee Fermentation: The Rise Of Carbonic

2021-7-15  Anaerobic fermentation happens in an oxygen-free environment. This oxygen-free environment might be a stainless steel tank purged with carbon dioxide or a tank filled with water. A good example of one of these processing methods is carbonic maceration.

Which of the following is not a characteristic of

2021-3-16  Find an answer to your question “Which of the following is not a characteristic of anaerobic species?They do not have mitochondria. They live in oxygen-rich settings. They” in 📘 Biology if you're in doubt about the correctness of the answers or there's no answer, then try to use the smart search and find answers to the similar questions.