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Sulphuric acid biogenic

  • Accelerated Biogenic Sulfuric Acid Corrosion Test for

    This task is achieved by the use of our simulation chamber for biogenic sulfuric-acid corrosion. The biologically-influenced corrosion is remodeled under conditions favoring the relevant microorganisms. Thus, an acceleration of the natural process is achieved.

  • (PDF) Chemical, microbiological, and in situ test methods

    Biogenic sulfuric acid corrosion is a very complex process. It comprises the microbiological aspect of the Thiobacilli bacteria, which transform sulfur to sulfuric acid. The action of the sulfuric acid can be seen as a purely chemical aspect that causes the chemical destruction of some components of the concrete. There are also mechanical

  • Biogenic sulphuric acid corrosion: a microscopic

    Biogenic sulphuric acid corrosion: a microscopic investigation. Concrete for extreme conditions. Proceedings of the International Congress on Challenges of Concrete Construction, Dundee, 5-11 September 2002 / R.K. Dhir, J. McCarthy & M.D. Newlands (eds.) (pp. 169178).

  • Accelerated testing of materials under the influence of

    The number of damages caused by biogenic sulphuric acid corrosion (BSA) is increasing. BSA is a damage situation that often occurs in sewer systems, building drainage, wastewater treatment plants and biogas plants. Sulphuric acid, which is generated through microbiological conversion of sulphur, leads to a combined chemical-biological attack on

  • Biogenic sulfuric acid corrosion (BSA) Department of

    Biogenic sulfuric acid corrosion (BSA) (finished project, researcher: J. Monteny, for more information contact prof. dr. ir. Nele De Belie ) The state of municipal sewer systems has become a serious concern world-wide, because of the cost of improvements, maintenance and replacement or

  • Reduced anthropogenic aerosol radiative forcing caused by

    Biogenic Nucleation Rates and Observational Evidence. Fig. 1 shows the effect of pure biogenic nucleation on the preindustrial and present day atmospheres. When sulphuric acid is required for nucleation to proceed, substantially less nucleation is expected for preindustrial times (Fig. 1A) compared with the present day (Fig. 1B).However, when pure biogenic nucleation is included, the

  • Biogenic sulfuric acid corrosion (BSA) Department of

    The degradation of concrete in sewers is caused by a microbiologically induced type of corrosion and is known as biogenic sulfuric acid attack (BSA). First, occurrence of BSA in Flanders was investigated through inspection of damage in situ and analysis of wastewater samples.

  • ASTM C1904 - 20 Standard Test Methods for Determination of

    In these tests, the biogenic acidification is achieved by sulfur-oxidizing bacteria (SOB) that can convert elemental sulfur or thiosulfate to sulfuric acid without the use of H 2 S gas. 1.2 This standard is referenced in the guideline document for MIC of concrete products.

  • Oxidation Products of Biogenic Emissions Contribute to

    Sulfuric acid was formed from oxidation of SO 2, and a broad range of oxidized biogenic compounds was produced from oxidation of PD. PD is a first-generation oxidation product of α-pinene; consequently, its oxidation products (in the following called BioOxOrg) closely represent later-generation oxidation products of biogenic monoterpenes.

  • Assessment of biogenic sulfuric acid corrosion in sewers.

    Biogenic sulfuric acid corrosion is caused by hydrogen sulfide gas which is released by the effluents in sewers and which is converted into sulfuric acid by sulfur bacteria in humid areas above the water level. After a brief explanation of these processes, this paper discusses calculation methods for forecasting the possibility of H2S formation in effluents in 2 predisposing environments

  • Combating sulphuric acid corrosion at wastewater plants

    Combating sulphuric acid corrosion at wastewater plants But biogenic transformation processes in sewage and water treatment systems are a natural enemy of conventional plants, frequently causing damage to concrete and metal elements that is expensive to repair. As a result, it is not uncommon for wastewater systems to have a lifespan

  • BIOGENIC SULPHURIC ACID CORROSION: A MICROSCOPIC

    Biogenic sulphuric acid corrosion is one of the most severe corrosion mechanisms in sewer pipes. Simulation of the tests in laboratory conditions is a demanding task due to the presence of bacteria. In this paper, the influence on the microstructure is investigated of two chemical immersion tests and a biochemical test.

  • Characterization of sulfur oxidizing bacteria related to

    Jul 18, 2016· Biogenic sulfuric acid (BSA) corrosion damages sewerage and wastewater treatment facilities but is not well investigated in sludge digesters. Sulfur/sulfide oxidizing bacteria (SOB) oxidize sulfur compounds to sulfuric acid, inducing BSA corrosion. To obtain more information on BSA corrosion in sludge digesters, microbial communities from six

  • Multicomponent new particle formation from sulfuric acid

    novel mechanism, involving HOMs, sulfuric acid, and ammo nia, which is able to closely reproduce observations of particleformationand growthindaytim eborealforest andsimilarenvironments.Thefindingselucidatethecomplex interactions between biogenic and anthropogenic vapors in the atmospheric aerosol system. INTRODUCTION

  • CLOUD experiment - Wikipedia

    Besides biogenic vapours produced by plants, another class of trace vapours, amines have been shown by CLOUD to cluster with sulphuric acid to produce new aerosol particles in the atmosphere. These are found close to their primary sources, e.g. animal husbandry , while alpha-pinene is

  • (PDF) Biogenic sulfuric acid corrosion resistance of new

    Biogenic sulfuric acid corrosion resistance was studied by analyzing the surface and localized morphology, mass loss and compressive strength of both concrete specimens.

  • ConBlock MIC: Antimicrobial Concrete Admixture

    This white formation is the gypsum formed in the reaction between the biogenic sulfuric acid and calcium hydroxide. Examples: The Technology of ConBlock MIC. At the base of ConBlock MIC is a silane molecule. The silane molecule serves two functions. First, it creates a covalent bond with the concrete it cannot wash off or leach out.

  • Biogenic sulfide corrosion - Wikipedia

    Biogenic sulfide corrosion is a bacterially mediated process of forming hydrogen sulfide gas and the subsequent conversion to sulfuric acid that attacks concrete and steel within wastewater environments. The hydrogen sulfide gas is biochemically oxidized in the presence of moisture to form sulfuric acid. The effect of sulfuric acid on concrete and steel surfaces exposed to severe wastewater

  • Concrete degradation mechanisms by sulfuric acid attack

    Biogenic sulfuric acid corrosion is often a problem in sewer environment: it can lead to a fast degradation of the concrete structures. Since the involvement of bacteria in the corrosion process

  • Computational Study of the Reaction between Biogenic

    We have postulated a mechanism for the reaction of sulfuric acid with stabilized Criegee intermediates (sCIs). We have computed Gibbs free energies for the reaction of sulfuric acid with two biogenic sCIs and three smaller model species. We have also calculated Gibbs free energies for two competing sink reactions. Due to the large size of the biogenic sCIs, the computations have been performed

  • (PDF) Chemical, microbiological, and in situ test methods

    Experimental research and prediction of the effect of chemical and biogenic sulfuric acid on different types of commercially produced concrete sewer pipes. By Dionys Van Gemert. Resistance of different types of concretes to cyclic sulfuric acid and sodium sulfate attack. By F. Girardi.

  • Biogenic corrosion principles - SewperCoat

    Biogenic Corrosion involves a complex ecosystem feeding on the nutrients found in septic waste water. This ecosystems "productivity" varies depending on the environment conditions (ambient temperature, relative moisture, retention time in the sewer, etc.), the more favorable, the conditions, the more sulfuric acid is produced.

  • Characterization of sulfur oxidizing bacteria related to

    Keywords: Acid attack, Concrete corrosion, Sludge digester, Sulfur oxidizing bacteria,Thiobacillus,Biogenic sulfuric acid, Sulfate reducing organisms Background Microbial deterioration of concrete by biogenic sulfuric acid (BSA) is a serious and common problem in waste-water treatment facilities. Worldwide, maintenance and

  • Resistance to biogenic sulphuric acid corrosion of polymer

    Jan 01, 2018· Beeldens, A, Joke Monteny, E Vincke, Nele De Belie, D Van Gemert, Luc Taerwe, and Willy Verstraete. 2001. Resistance to Biogenic Sulphuric Acid Corrosion of Polymer-modified Mortars. Cement & Concrete Composites 23 (1): 4756.

  • Computational study of the reaction between biogenic

    We have computed Gibbs free energies for the reaction of sulfuric acid with two biogenic sCIs and three smaller model species. We have also calculated Gibbs free energies for two competing sink reactions. Due to the large size of the biogenic sCIs, the computations have been performed at the relatively modest B3LYP/6-31G(d,p) and B3LYP/6-311+G

  • A new test procedure for biogenic sulfuric acid corrosion

    A new test method is described for biogenic sulfuric acid corrosion of concrete, more specifically in sewer con-ditions.The aim of the new test method is the development of an accelerated and reproducible procedure formonitoring the resistance of different types of concrete with regard to biogenic sulfuric acid corrosion. This exper-imentalprocedure reflects worst case conditions by providing

  • Biogenic corrosion by sulfuric acid (BSA)

    biogenic sulfuric acid corrosion (BsA) is increasing. The development of materials resistant to BsA requires testing methods that allow for a testing of the materials that is both oriented towards practice and accelerated. To achieve this, test rigs were setup at Fraunhofer UMsICHT. In coopera-

  • Biogenic sulfuric acid corrosion of concrete : microbial

    Biogenic sulfuric acid corrosion of concrete : microbial interaction, simulation and prevention / Door Elke Vincke. Other title: Biogene zwavelzuurcorrosie van beton microbiële interactie, simulatie en preventie Author: Vincke, Elke Verstraete, Willy promotor viaf Corporate author: RUG. Faculteit Landbouwkundige en Toegepaste Biologische

  • Biogenic acid attack on concretes in biogas plants

    Jul 01, 2016· This reaction, which is already known in drainage pipelines and sewer technology as biogenic sulphuric acid corrosion (BSC) occurs in the gas phase of the fermenter. During the operational phase, the pH value of the concrete surface drops even further through the dissociation of the H 2 S , the carbonic acid forms from the moisture-saturated CO

  • How SewperCoat® resist biogenic corrosion principles

    SewperCoat ® 's unique durability comes from its calcium aluminate composition, creating a "Total Barrier" to the biogenic corrosion process. Ultimately, it induces a biostatic effect that reduces the sulfuric acid production of the bacteria, hence inhibiting the corrosion process itself.

  • Biogenic Sulphuric Acid Attack in Sewage Systems

    As a result of the study the particular ecosystem designated the Biogenic Sulphuric Acid Corrosion of Concrete was reproduced in a simulation apparatus. Samples were inoculated with thiobacilli and incubated for 9 months in a test chamber with a humidity > 95% and a temperature of 30°C. Three sulphur sources, hydrogen sulphide

  • Biogenic sulfuric acid corrosion resistance of new

    The biogenic sulfuric acid corrosion simulation device is schematically shown in Fig. 1, which has been modified based on the one reported in literature [18].H

  • Biogenic Sulfuric Acid Attack and Case Studies

    Biogenic Sulfuric Acid Attack and Case Studies by Hugh (Xiaoqiang) Hou, Kimberly A. Steiner, John Fraczek, and James A. Mahaney B iogenic sulfuric acid attack (BSA) is probably the most common and most severe biodegradation mechanism affecting concrete. BSA causes widespread global infrastructure deterioration, and it is

  • Role of Criegee intermediates in the formation of sulfuric

    Role of Criegee intermediates in the formation of sulfuric acid at a Mediterranean (Cape Corsica) site under influence of biogenic emissions Alexandre Kukui1, Michel Chartier1, Jinhe Wang 2,3, Hui Chen3,a, Sébastien Dusanter4, Stéphane 5 Sauvage 4, Vincent Michoud4,b, Nadine Locoge 4, Valérie Gros5, Thierry Bourrianne6, Karine Sellegri7,

  • Biogenic corrosion principles - SewperCoat

    Biogenic Corrosion, or Microbiolocaly Induced Corrosion (MIC), occurs when specific strains of bacteria "colonize" the sewer surfaces and produce sulfuric acid that "eats away" the materials like concrete, steel, and cast iron. Although microscopic, such

  • ACPD - Role of Criegee intermediates in the formation of

    Sulfuric acid, H 2 SO 4, plays a key role in formation of secondary atmospheric aerosol particles.It is generally accepted that the major atmospheric source of H 2 SO 4 is the reaction of OH radicals with SO 2.In this study, an importance of additional H 2 SO 4 source via oxidation of SO 2 by stabilized Criegee intermediates was estimated based on measurements at a remote site on Cape Corsica.

  • Biogenic sulfuric acid corrosion resistance of new

    Jan 15, 2018· The most typical microbial corrosion on concrete is the biogenic sulfuric acid corrosion. The lower part of artificial reefs, which is generally constructed in shallow sea, is

  • H S Biogenic corroSion: WHy USing calciUm alUminate

    S biogenic corrosion takes place in the aerial part of the sewer. On the wet walls and ceiling of sewers, other strains of aerobic bacteria are using the sulphur from H 2 S as a source of energy by oxidizing it. The result of this oxidation is sulphuric acid (H 2 SO 4). It is this bacteria borne

  • TECHNICAL PAPER SULFURIC ACID RESISTANCE OF STRAIN

    Since the biogenic sulfuric acid attack is one of the main deterioration mechanisms of concrete wastewater facilities [5-8], the high acid resistance of geopolymer concrete seems promising for improving durability of wastewater infrastructure. Recently, a new

  • How biogenic terpenes govern the correlation between

    New particle formation has been observed to take place all around the world. However, because of the inability to determine the chemical composition of the smallest clusters or particles, indirect tools such as the correlation between nucleation rate and measured sulfuric acid concentrations have been used to infer the nucleation mechanism. In this study we describe the observed correlation

  • Biogenic Sulfuric Acid Attack and Case Studies Articles

    Biogenic sulfuric acid attack (BSA) is probably the most common and most severe biodegradation mechanism affecting concrete. BSA deterioration is generally manifested as exfoliated surface loss with aggregate exposed, discoloration, and

  • Biogenic and Chemical Sulfuric Acid Corrosion of Mortars

    Measurement of the amount of biogenic sulfuric acid on CAC and portland and blended portland cement mortars demonstrated a higher amount of acid on the latter. The more effective resistance of CAC mortars was explained by the higher neutralization capacity due to their chemical composition and the smaller production of biogenic acid.

  • Combating sulphuric acid corrosion at wastewater plants

    Toxic gases released during biogenic processes, such as hydrogen sulphide, These microorganisms produce sulphuric acid which reacts with concrete construction elements. As Günther Koraimann