Anaerobic hydrocarbon. Medical search. Frequent questions

Both polycyclic aromatic hydrocarbons (PAHs) and naphthenic acids (NAs) are natural components of fossil fuels, but they are also widespread toxic and environmentally persistent pollutants. (essex.ac.uk)
2014. Source apportionment of polycyclic aromatic hydrocarbons (PAHs) into Central Park Lake, New York City, over a century of deposition. (nih.gov)
Polycyclic aromatic hydrocarbons (PAHs), a major constituent of petroleum -based effluent, are a group of hydrocarbons containing two or more fused aromatic rings in linear, angular or clustered arrangements. (omicsonline.org)
Alkane degradation ability was near ubiquitous among candidate hydrocarbon degraders, whereas just three harbored elaborate gene inventories for the degradation of alkanes and aromatic and polycyclic aromatic hydrocarbons (PAHs). (nature.com)
Polycyclic aromatic hydrocarbons are the most important components of contaminants retained in the soil environment after any oil spillage. (scialert.net)
The aim of the study was to screen Polycyclic Aromatic Hydrocarbon (PAH) Degrading Soil Microbes from an Automobile Workshop Sediments. (scialert.net)
Among the 34 oil-degrading microbial isolates collected from petrochemical contaminated workshop sediments of Puducherry in India five isolates are screened and selected based on their efficiency to mineralize Polycyclic Aromatic Hydrocarbons. (scialert.net)

It has been reported that toxic compounds such as aliphatic hydrocarbons, aromatic hydrocarbons, phenols, h eavy metals/metal derivatives and other chemicals used during processes such as de-emulsification, are always present in crude oil effluent [ 3 , 4 ]. (omicsonline.org)
They have the ability to oxidize a variety of organic compounds, including AROMATIC HYDROCARBONS . (bvsalud.org)
Bioremediation of groundwater contaminated by a mixture of aromatic hydrocarbons and chlorinated solvents is typically challenged because these contaminants are degraded via distinctive oxidative and reductive pathways, thus requiring different amendments and redox conditions. (bvsalud.org)

To better understand the anaerobic oxidation of short-chain n -alkanes coupled with sulfate-reduction, hydrocarbon-rich sediments from the Gulf of Mexico (GoM) were amended with artificial, sulfate-replete seawater and one of four n -alkanes (C 1 -C 4 ) then incubated under strict anaerobic conditions. (frontiersin.org)
These data further constrain the potential influence of alkane oxidation on sulfate reduction rates (SRRs) in cold hydrocarbon-rich sediments, provide insight into their contribution to local carbon cycling, and illustrate the extent to which short-chain alkanes can serve as electron donors and govern microbial community composition and density. (frontiersin.org)
The anaerobic oxidation of methane, or AOM, has been the subject of research for four decades, and much of the work has been focused on identifying the responsible microbes, their distribution, and the biochemistry of AOM. (frontiersin.org)
Anaerobic methanotrophic archaea (ANME) are the main responsible of anaerobic oxidation of methane in anoxic environments. (marum.de)
However, little is known about the role of other archaea in the anaerobic oxidation of other hydrocarbons. (marum.de)
Anaerobic oxidation of methane at different temperature regimes in Guaymas Basin hydrothermal sediments. (iodp.org)
Pore water profiles of sulphate, hydrogen sulphide and total alkalinity indicate that anaerobic oxidation of methane occurs at 34-180 cm depth below seafloor. (nerc.ac.uk)
The oxidation of an oil occurs when atmospheric oxygen attacks the weak areas of hydrocarbon molecules. (wearcheck.com)
A phylogenetic and functional gene-based analysis of the "bioelectric well" confirmed the establishment of a microbiome harboring the metabolic potential for anaerobic toluene oxidation and TCE reductive dechlorination. (bvsalud.org)

Catallo and Junk determined that reacting organic compounds in near-critical or supercritical aqueous phases can transform the compounds over short time periods (i.e., minutes to hours) into petroleum-like hydrocarbon mixtures. (greencarcongress.com)
With the New Oil tailored system, the liquefaction process much lighter, deoxygenated hydrocarbons, similar to the gasoline fraction produced in petroleum refineries. (greencarcongress.com)
In general, anaerobic conditions are used to degrade highly halogenated contaminants, though some petroleum hydrocarbons may also be biodegraded anaerobically. (clu-in.org)
Estimating the Changing Rate of Anaerobic Reductive Dechlorination of Chlorinated Aliphatic Hydrocarbons in the Presence of Petroleum Hydrocarbons. (epa.gov)
This paper summarizes the general processes of bioremediation within the soil environment, focusing on biodegradation of petroleum hydrocarbons. (montana.edu)
For example, petroleum hydrocarbons can be degraded by microorganisms in the presence of oxygen through aerobic respiration. (montana.edu)
The leakage of petroleum hydrocarbons from the underground storage tanks contaminate the surrounding ground water and soil and compounds enter into the environment by being soluble in water and binding strongly to soil ( Arafa, 2003 ). (scialert.net)
Anaerobic bioremediation is a relevant process in the management of sites contaminated by petroleum hydrocarbons. (bvsalud.org)
In particular, in microcosms supplemented with ECMs, the removal of total petroleum hydrocarbons was enhanced by up to 50% relative to unamended controls. (bvsalud.org)
Petroleum is the most abundant source of saturated hydrocarbons. (nih.gov)
Before natural gas and petroleum became essential raw materials for organic chemicals, the most important source of saturated hydrocarbons was coal. (nih.gov)

Over the past few decades, anaerobic-aerobic wastewater treatment systems have been widely used in industrial and municipal wastewater treatment. (edu.pl)
This study was conducted to examine the effects of combined anaerobic-aerobic bioreactors in the removal of chemical oxygen demands (COD) while reducing phosphate concentrations in synthetic wastewater. (edu.pl)
In this project, a bioreactor with the dimensions of 10 cm × 10 cm × 80 cm with respective Kaldnes packing ratios of 90 and 30% for the anaerobic and aerobic sections was designed. (edu.pl)
A combined anaerobic-aerobic reactor's structure made changing hydraulic retention times only possible by adjusting the volume of its aerobic and anaerobic sections. (edu.pl)
In the first case, the anaerobic and aerobic sections of the reactor occupied 30 and 50 cm of its height, respectively. (edu.pl)
In aerobic and anaerobic sections, pH was within a neutral range, temperature was 37°C. MLSS (mixed liquor suspended solids) was 1220 and 1030 mg/L, and attached growth was 743 and 1190 mg/L respectively. (edu.pl)
Baek S.H., Pagilla K.R.: Aerobic and anaerobic membrane bioreactors for municipal wastewater treatment. (edu.pl)
Zhang C., Guisasola A., Baeza J.A.: Achieving simultaneous biological COD and phosphorus removal in a continuous anaerobic/aerobic A-stage system. (edu.pl)
Upgrading combined anaerobic-aerobic UASB-FPU to UASB-DHS system: Cost comparison and performance perspective for developing countries. (edu.pl)
Chan Y.J., Chong M.F., Law C.L., Hassell D.G.: A review on anaerobic-aerobic treatment of industrial and municipal wastewater. (edu.pl)
o Design of aerobic/anaerobic pyrolysis systems, smoking devices, and flow systems to expose cells or whole animals to vapor phases. (nih.gov)
Researchers led by Edward Bouwer, Ph.D., at Johns Hopkins Whiting School of Engineering were evaluating a novel technology - a flow-through barrier containing granular activated carbon coated with anaerobic and aerobic microorganisms - to see if it could completely break down chlorobenzenes and benzene contaminants, which are known or suspected carcinogens. (nih.gov)

This study aimed to investigate the anaerobic biodegradation of the PAHs pyrene and 2-methylnaphthalene, and the NAs adamantane-1-carboxylic acid and a "natural" NA mixture (i.e., acid-extractable NAs from OSPW) under sulfate-reducing and methanogenic conditions by a microbial community derived from an oil sands tailings pond. (essex.ac.uk)
Despite the biodegradation of 2-methylnaphthalene, this study demonstrates that, under anaerobic conditions, NAs and high-molecular-weight PAHs are the predominant molecules likely to persist in OSPW. (essex.ac.uk)
The recurrent and indiscriminate discharge of flow stations' crude oil effluent has led to an increased polyaromatic hydrocarbons (PAHs) level in the environment. (omicsonline.org)

The AOM mechanism most relevant to this study is mediated by microbial consortia of archaea, related to the archaeal anaerobic methane oxidizer group ANME, and bacterial sulfate-reducers of the Desulfosarcinales/ Desulfococcus (DSS) group ( Knittel and Boetius, 2009 and references therein). (frontiersin.org)
Some of its relatives are multi-carbon hydrocarbon-degrading archaea , others are the long-known own methanogens that form methane as metabolic product. (mpg.de)
Apart from ANME, only three archaea are described as anaerobic hydrocarbon degraders, although the three use mechanisms of bacterial origin. (marum.de)
The aim of my PhD was to shed light on the role of archaea in anaerobic hydrocarbon degradation. (marum.de)
The discovery of this novel MCRs is the foundation of a novel pathway in archaea to degrade hydrocarbons that is present in different archaeal clades and might play a role in carbon cycling in deep reservoirs. (marum.de)
Asgard archaea capable of anaerobic hydrocarbon cycling. (eco-news.space)
AN - infection: coord IM with GRAM-NEGATIVE BACTERIAL INFECTIONS (IM) HN - 2004 MH - Acidianus UI - D041541 MN - B7.75.725.725.30 MS - A genus of facultatively anaerobic coccoid ARCHAEA, in the family SULFOLOBACEAE. (nih.gov)

There, these hydrocarbons move up from source rocks through fractures and sediments towards the surface, where they leak out of the ground and sustain a diversity of densely populated habitats in the dark ocean. (mpg.de)
Anaerobic Degradation of Chloroaromatic Compounds in Aquatic Sediments under a Variety of Enrichment Conditions. (epa.gov)

The anaerobic reductive dechlorination of the more highly chlorinated (more oxidized) chlorinated hydrocarbons, such as PCE and TCE, occurs more readily than the dechlorination of chlorinated hydrocarbons that already are somewhat reduced (less oxidized), such as DCE and VC. (clu-in.org)

The effect of soil conditions on rate of biodegradation of hydrocarbons is addressed. (montana.edu)
Here, a microcosm study was set up to investigate the effect of different electrically conductive materials (ECMs) in enhancing the anaerobic biodegradation of hydrocarbons in historically contaminated soil. (bvsalud.org)

The methane rich biogas stream is purified by removing contaminants and upgraded to liquid hydrocarbon fuel in a gas to liquid facility (GTL) via thermochemical conversion route. (usf.edu)
In anaerobic conditions, microorganisms will ultimately metabolize organic contaminants to methane, limited amounts of carbon dioxide, and trace amounts of hydrogen gas. (clu-in.org)
Hydrocarbons are commonly found water contaminants due to their extensive use. (encyclopedia.pub)

They consist of simple compounds of carbon and hydrogen or complex compounds with varying physicochemical properties and are generally classified into aromatic, alicyclic, and aliphatic hydrocarbons. (encyclopedia.pub)

Undecane was selected from a group of hydrocarbons found in fuels and solvents, but it is also a ubiquitous air pollutant in outdoor and indoor environments, and in water. (nih.gov)

Marine hydrocarbon seeps are ecosystems that are rich in methane, and, in some cases, short-chain (C 2 -C 5 ) and longer alkanes. (frontiersin.org)
Marine hydrocarbon seeps are natural features that support considerable biological diversity and activity ( Muyzer and Van Der Kraan, 2008 and references therein). (frontiersin.org)

Anaerobic microbes use electron acceptors in preferential order: nitrate, manganese, ferric iron oxyhydroxides, sulfate, and carbon dioxide (Source: Parsons 2004). (clu-in.org)

Nijenhuis I. and Kuntze K. (2016) Anaerobic microbial dehalogenation of organohalides - state of the art and remediation strategies. (isodetect.de)
Recently, interspecies electron transfer processes mediated by conductive minerals or particles have been proposed as mechanisms through which microbial species within a community share reducing equivalents to drive the syntrophic degradation of organic substrates, including hydrocarbons. (bvsalud.org)

During anaerobic biodegradation of chlorinated compounds, sequential removal of chloride ions is generally observed. (clu-in.org)
Many components of odors are vola-tile organic compounds (VOCs) such as hydrocarbons (such as methane), alcohols (such as ethanol) and organic acids (such as acetic acid). (rutronik.com)
ThreadLocker anaerobic compounds are great for locking, retaining, sealing and gasketing a variety of components. (bigwrenchracing.com)
Water contaminated with various hydrocarbon compounds such as MTBE and BTEX are a worldwide environmental threat. (encyclopedia.pub)
Fatty acids are a class of chemical compounds containing a short or long 'hydrocarbon chain' (composed only of hydrogens and carbons) and a 'carboxylate group' (which gives acidic properties to fatty acids) at the end of the chain. (nih.gov)

Influence of Alternative Electron Acceptors on the Anaerobic Biodegradability of Chlorinated Phenols and Benzoic Acids. (epa.gov)

In anaerobic reactions, bacteria gain energy and grow as an atom on a contaminant is replaced with hydrogen (AFCEE). (clu-in.org)
Three species of bacteria and two species of microalgae isolated, characterized and screened emerged as best hydrocarbon utilizers. (omicsonline.org)
Enrichment and isolation of anaerobic hydrocarbon-degrading bacteria. (ouhsc.edu)
A genus of gram-negative, anaerobic, metal-reducing bacteria in the family Geobacteraceae. (bvsalud.org)

Oil shale has been processed to produce hydrocarbon oils since the middle of the 19th century. (onepetro.org)
Under high temperatures in anaerobic conditions mineral oils resist chemical degradation. (wearcheck.com)

This microbe, an archaeon named Methanoliparia, transforms the hydrocarbons by a process called alkane disproportionation: It splits the oil into methane and carbon dioxide. (mpg.de)

The biogas conversion involves two major steps: tri-reforming step to produce syngas (a mixture of CO and H2), and Fischer-Tropsch Synthesis (FTS) step to convert the syngas to a spectrum of hydrocarbons. (usf.edu)
As an example of progression in system size, Western Plains Energy announced plans to build a $40 million anaerobic digester to produce enough biogas to replace 90% of the fossil fuel used in the manufacturing process at the company's 50-million-gallon Oakley ethanol plant. (altenergystocks.com)
Animal waste and human excreta are biologically reprocessed into hydrocarbon biogas by anaerobic fermentation. (tellaartoislesavoir.com)

Diversity of benzyl- and alkylsuccinate synthase genes in hydrocarbon-impacted environments and enrichment cultures. (iodp.org)

Tectonic activity forms faults that facilitate the release of methane (CH 4 ) and other hydrocarbons from deep subsurface oil and gas deposits, as well as gas hydrates ( Muyzer and Van Der Kraan, 2008 ). (frontiersin.org)

They are present in many objects, cleaning agents and cosmetics, are secreted by living beings, and are produced in various processes, including the anaerobic de-composition of organic substances (rotting). (rutronik.com)

A family of anaerobic, coccoid to rod-shaped METHANOBACTERIALES . (nih.gov)

Biodegradation of Monoaromatic Hydrocarbons by Aquifer Microorganisms Using Oxygen, Nitrate, or Nitrous Oxide as the Terminal Electron Acceptor. (epa.gov)
The hydrocarbon loses electrons and is oxidized while oxygen gains electrons and is reduced. (montana.edu)
2001). When oxygen is limited in supply or absent, as in saturated or anaerobic soils or lake sediment, anaerobic (without oxygen) respiration prevails. (montana.edu)
Oxygen, in the presence of heat, is able to chemically alter the C=C in the hydrocarbon, to initiate the formation of peroxides (RCOOH). (wearcheck.com)

therefore, microorganisms which are capable of attenuating or degrading hydrocarbons exist in the environment. (montana.edu)
On the other hand, biomolecular analyses confirmed the presence of several microorganisms and functional genes likely involved in hydrocarbon degradation. (bvsalud.org)

Many of these genomes exhibited phylogenetic clustering indicative of common trait selection by the environment, and within half we identified 264 genes associated with hydrocarbon degradation. (nature.com)

The study of C 2 -C 5 hydrocarbon degradation has lagged behind that of CH 4 in spite of their abundance in some environments. (frontiersin.org)
plants used in constructed wetlands are typically those that are tolerant of anaerobic environments for a portion of the growing season (ITRC 2003). (clu-in.org)
Von Netzer F., Kuntze K. , Vogt C., Richnow H.H., Boll M., Lüders T. (2016) Functional gene markers for fumarate-adding and dearomatizing key enzymes in anaerobic aromatic hydrocarbon degradation in terrestrial environments. (isodetect.de)

Converting non-recyclable garbage into energy, power, or fuel utilizing renewable energies, such as anaerobic fermentation and plasma combustion, is known as waste to energy. (tellaartoislesavoir.com)

Most applications of anaerobic bioremediation occur in situ rather than ex situ. (clu-in.org)

The reductive process is conducted in anaerobic or near-anaerobic conditions, essentially free of any strong oxidants. (greencarcongress.com)
The biodegradation chain of chlorinated hydrocarbons starting from Tetrachloroethene and ending with Vinylchloride is modeled under anaerobic environmental conditions for five decades. (nersc.no)
Large scale production has usually involved mining the shale and retorting it under anaerobic conditions at atmospheric pressure, at temperatures near 500°C, for times on the order of an hour. (onepetro.org)

The process involves anaerobic digestion (AD) of the biodegradable portion of the biomass to produce methane rich gas. (usf.edu)
Energy may be recovered from the sludge once the compression process is complete, either by burning the methane gas produced by anaerobic digestion or incineration of the dried sludge itself. (hydrocarbons-technology.com)

Furthermore, although anaerobic metabolism, mitochondria, oxidative stress, intracellular calcium overload, liver Kupffer cells (KC), neutrophils, cytokines, and chemokines have been found to be involved in the hepatic IR injury process, effective prevention or treatment in clinical practice is still lacking. (researchsquare.com)

In order to evaluate COD in the wastewater, three different initial phosphorus concentrations were tested: 12.8, 32.0 and 44.8 mg/L, as well as four COD: 500, 1000, 1200 and 1400 mg/L. Considering the results, COD removal is greater than 80% when the valve 2 is in the anaerobic section outlet regardless of the concentration of phosphate. (edu.pl)
Anaerobic membrane bioreactors for wastewater treatment: A review. (edu.pl)

Hydrogen is generally the most important electron donor for anaerobic dechlorination (Parsons 2004). (clu-in.org)
Upgrading alcohol fuels to hydrocarbons can be accomplished without hydrogen gas ORNL has developed such a process . (altenergystocks.com)
There being roughly a kilo of hydrogen in a gallon of hydrocarbon fuel at $0.10 for lowest cost renewable electricity (e.g. wind), there's $1.70-$2.50 cost per gallon just to provide the hydrogen feedstock, and you still have to pay for the process and whatever cost of aggregating CO2. (altenergystocks.com)

Hydrocarbon contamination typically occurs in areas with industrial activity, for example, close to chemical/petrochemical plants, oil refineries, power plants, manufacturing industries, plastic and steel production facilities, and cooling plants. (encyclopedia.pub)

The results of a comprehensive suite of chemical and microbiological analyses evidenced that supplementing the soil with (5% w/w) magnetite nanoparticles or biochar particles is an effective strategy to accelerate the removal of selected hydrocarbons. (bvsalud.org)

Here, we investigated the simultaneous degradation of toluene and chloroform (CF) in a continuous-flow anaerobic bioelectrochemical reactor. (bvsalud.org)

Hydrocarbon contamination of water resources is a global issue. (encyclopedia.pub)

This entry discusses the use of the green technology of constructed wetlands to remediate water polluted with hydrocarbons. (encyclopedia.pub)

The aryl hydrocarbon receptor (AhR) is a ligand-activated basic helix-loop-helix/Per-ARNT-Sim transcription factor known to mediate toxic and carcinogenic effects of xenobiotics. (researchsquare.com)

The use of biomass as a potential feedstock for the production of liquid hydrocarbon fuels has been under investigation in the last few decades. (usf.edu)
This paper discusses a preliminary design and a feasibility study of producing liquid hydrocarbon fuels from biomass through a combined biochemical and thermochemical route. (usf.edu)
Separation and upgrading of the produced hydrocarbon mixture allows production of synthetic transportation fuels. (usf.edu)

Undecane may have a considerable human toxicological impact since it is found in many situations where proven carcinogenic hydrocarbons such as fuel combustion products or cigarette smoke are also present. (nih.gov)

Since his visit to Kluyver's laboratory in Delft, the Netherlands, in 1935, Barker had been seeking to explain an interesting observation that short-chain fatty acids were produced from ethyl alcohol in the presence of an anaerobic bacterium, C. kluyveri. (nih.gov)

Saturated hydrocarbons are carbon molecules that contain exclusively carbon-carbon bonds (C-C). Since no refinement process is completely 100% successful, the hydrocarbons will contain weak areas. (wearcheck.com)

Submarine mud volcanism is an important pathway for transfer of deep-sourced fluids enriched in hydrocarbons and other elements into the ocean. (nerc.ac.uk)

The pore fluids are significantly depleted in chloride, but enriched in lithium, boron and hydrocarbons, relative to seawater. (nerc.ac.uk)

The composition of the final liquid hydrocarbon from the ASPEN model has been compared to the composition of commercial diesel fuel, and results have shown good agreement. (usf.edu)

Chemicals and Drugs18

Phenomena and Processes1

Health Care1

Polycyclic7

Aromatic hydrocarbons3

Oxidation9

Petroleum11

Aerobic12

PAHs3

Archaea7

Sediments2

Reductive dechlorination1

Biodegradation of hydrocarbons2

Contaminants3

Aliphatic Hydrocarbons1

Group of hydrocarbons1

Seeps2

Microbes1

Microbial2

Compounds5

Phenols1

Bacteria4

Oils2

Carbon dioxide1

Biogas3

Enrichment1

Subsurface1

Organic1

Coccoid1

Oxygen4

Microorganisms2

Genes1

Environments3

Fermentation1

Bioremediation1

Conditions3

Digestion2

Metabolism1

Wastewater2

Hydrogen3

Occurs1

Soil1

Reactor1

Contamination1

Constructed wetlands1

Toxic1

Fuels3

Combustion1

Presence1

Process1

Pathway1

Chloride1

Fuel1