CALL US

+86 17838360708

Biogenic sulfur attack in a reinforced concrete sewage

Biogenic sulfur attack in a reinforced concrete sewage

Biogenic sulfur attack in a reinforced concrete sewage ...

Jun 01, 2021  Biogenic sulfur attack in a reinforced concrete sewage treatment plant. Re-visited mechanism and rehabilitation proposal ... The main methods of control and

get price

Biogenic sulfur attack in a reinforced concrete sewage ...

Biogenic sulfur attack in a reinforced concrete sewage treatment plant. Re-visited mechanism and rehabilitation proposal. ... Given this, the objective of the

get price

Biogenic Sulfuric Acid Attack and Case Studies

Fig. 1: Schematic representation of biogenic sulfuric acid attack (BSA) mechanism in a concrete sewage pipe (after Reference 2), where SOB is sulfur-oxidizing

get price

Acid Corrosion of Plain and Reinforced Concrete Sewage ...

Sep 09, 2013  The infrastructure of concrete sewage systems is affected notably by biogenic sulfuric acid attack, which causes rapid deterioration of each of its components. To

get price

Biogenic sulfuric acid attack on different types of ...

Biogenic sulfur attack in a reinforced concrete sewage treatment plant. Re-visited mechanism and rehabilitation proposal ... taking place in the partial filled profile

get price

(PDF) Study of the Deterioration of Concrete Influenced by ...

Biogenic sulfur attack in a reinforced concrete sewage treatment plant. ... in order to identify concrete degradation due to biogenic sulfuric acid attack. Concrete samples were exposed to ...

get price

Acid Corrosion of Plain and Reinforced Concrete Sewage ...

Sep 09, 2013  The infrastructure of concrete sewage systems is affected notably by biogenic sulfuric acid attack, which causes rapid deterioration of each of its components. To provide a better understanding of this mechanism of damage, this paper reports on research carried out to study the response of the cementitious concrete matrix and the reinforcement ...

get price

Biochemical attack on concrete in wastewater applications ...

Aug 01, 2010  Only limited work has been carried out in assessing the performance of concrete mixes in a biological environment a surprising fact considering several researchers have claimed that biogenic sulfuric acid corrosion found in wastewater systems is more severe than chemical sulfuric acid and sulfate attack , . This represents a key knowledge gap ...

get price

Biogenic corrosion on ribbed reinforcing steel bars with ...

Oct 15, 2015  Millions of dollars are being spent on the repair of reinforcement sewage pipelines notably affected by biogenic sulfuric acid attack, which causes rapid deterioration of concrete and reinforcing steel rebars. As known from the literature, concrete is a porous structure, and acid penetrates to the pipeline’s reinforcement steel bar.

get price

(PDF) Improving Concrete Durability for Sewerage Applications

However, the contaminants in sewage may cause physical and chemical attacks to the concrete. In particular, the biogenic sulphuric acid attack poses a great threat to the concrete.

get price

Improving Concrete Durability for Sewerage Applications ...

Nov 30, 2014  Abstract. Concrete is a widely adopted construction material in sewerage applications such as concrete pipes, manholes, box culverts, treatment tanks, and sewage conveyance tunnels. However, the contaminants in sewage may cause physical and chemical attacks to the concrete. In particular, the biogenic sulphuric acid attack poses a great threat ...

get price

Chemical, microbiological, and in situ test methods for ...

Under certain biogenic pathway, hydrogen sulfide gas is oxidized into sulfuric acid, which attacks concrete and metal pipes, leading to premature deterioration of the sewer assets [10, 11]. Since ...

get price

Biogenic deterioration of concrete and its mitigation ...

Sep 15, 2017  Sewer systems. Biogenic degradation of concrete pipes in sewer systems is the most widely studied type of deterioration induced by microorganisms and is initiated with the biological reduction of sulphate (SO 4 2−) and organic sulphide (S 2−) to hydrogen sulphide (H 2 S) by sulphate reducing bacteria (SRB) (e.g. Desulfovibrio sp.) in ...

get price

Sulphate Attack on Concrete - Process and Control of ...

Sulphate attack on concrete is a chemical breakdown mechanism where sulphate ions attack components of the cement paste. The compounds responsible for sulphate attack on concrete are water-soluble sulphate-containing salts, such as alkali-earth (calcium, magnesium) and alkali (sodium, potassium) sulphates that are capable of chemically reacting ...

get price

PENETRON ARC: A Protective Coating Against Acid Attack in ...

The hydrogen sulfide gas is oxidized by sulfur-oxidizing bacteria to form biogenic sulfuric acid. This lowers the pH level on the surface of the concrete, enhancing the spread of sulfur-oxidizing, acid-producing bacteria. “When concrete in sewer and septic environments is exposed to sulfates and biogenic sulfuric acid attack, deterioration of ...

get price

The Inclusion of Acidic and Stormwater Flows in Concrete ...

Jan 22, 2021  Abstract: Concrete sewer pipes can be deteriorated by sulfuric acid (H2SO4), which is created by the oxidation of hydrogen sulfide in the presence of certain bacteria inside the sewers. This process is called biocorrosion. In this paper, H2SO4 (i.e., chemical, non-biogenic) was used to study acid attack on concrete samples.

get price

Sulfate Attack - an overview ScienceDirect Topics

Sulfate attack is another possible deterioration mechanism of concrete. It can have endogenous origin (developing without any contribution from the environment) or exogenous origins (such as sulfates contained in the soils or in liquids) (Germain, 2008; Neville, 2004).In both cases, the consequence is some volume expansion owing to the delayed formation of ettringite, which is an expansive ...

get price

PENETRON ARC: A Protective Coating Against Acid Attack in ...

Jul 14, 2020  Biodeterioration leads to premature deterioration of reinforced concrete structures from chemical attack, which is a serious concern for the wastewater industry. Sulfur-reducing bacteria in

get price

Evaluation of acid diffusion behaviour of amine-cured ...

Abstract Epoxy coatings are used as barriers to protect concrete sewer pipes from the ingress of corrosive biogenic acids. To establish the relative performance of coatings in sewer environments, this study investigated the diffusion and mass transfer of sulphuric acid through two industrial coatings, epoxy F and epoxy Novolac, using accelerated permeation tests. Weight uptake data fitted to ...

get price

Acid Corrosion of Plain and Reinforced Concrete Sewage ...

Sep 09, 2013  The infrastructure of concrete sewage systems is affected notably by biogenic sulfuric acid attack, which causes rapid deterioration of each of its components. To provide a better understanding of this mechanism of damage, this paper reports on research carried out to study the response of the cementitious concrete matrix and the reinforcement ...

get price

Biochemical attack on concrete in wastewater applications ...

Aug 01, 2010  Only limited work has been carried out in assessing the performance of concrete mixes in a biological environment a surprising fact considering several researchers have claimed that biogenic sulfuric acid corrosion found in wastewater systems is more severe than chemical sulfuric acid and sulfate attack , . This represents a key knowledge gap ...

get price

Biogenic corrosion on ribbed reinforcing steel bars with ...

Oct 15, 2015  Millions of dollars are being spent on the repair of reinforcement sewage pipelines notably affected by biogenic sulfuric acid attack, which causes rapid deterioration of concrete and reinforcing steel rebars. As known from the literature, concrete is a porous structure, and acid penetrates to the pipeline’s reinforcement steel bar.

get price

Sulfuric Acid Attack On Concrete Sewer Pipe ebook PDF ...

Sulfuric Acid Attack On Concrete Sewer Pipe. Download and Read online Sulfuric Acid Attack On Concrete Sewer Pipe ebooks in PDF, epub, Tuebl Mobi, Kindle Book. Get Free Sulfuric Acid Attack On Concrete Sewer Pipe Textbook and unlimited access to our library by created an account. Fast Download speed and ads Free!

get price

Biogenic deterioration of concrete and its mitigation ...

Sep 15, 2017  Sewer systems. Biogenic degradation of concrete pipes in sewer systems is the most widely studied type of deterioration induced by microorganisms and is initiated with the biological reduction of sulphate (SO 4 2−) and organic sulphide (S 2−) to hydrogen sulphide (H 2 S) by sulphate reducing bacteria (SRB) (e.g. Desulfovibrio sp.) in ...

get price

Sulphate Attack on Concrete - Process and Control of ...

Sulphate attack on concrete is a chemical breakdown mechanism where sulphate ions attack components of the cement paste. The compounds responsible for sulphate attack on concrete are water-soluble sulphate-containing salts, such as alkali-earth (calcium, magnesium) and alkali (sodium, potassium) sulphates that are capable of chemically reacting ...

get price

Evaluation of sulfate ions in degrading armed concrete ...

Jun 12, 2019  Concrete is susceptible to attack in places considered aggressive, such as wastewater treatment stations. Sulfate ions attack is very common in these places, resulting in accelerated degradation of the concrete, which can compromise any reinforced concrete structure. In this context, the present research aims to evaluate the pathological manifestations caused by these ions, analyzing

get price

The Inclusion of Acidic and Stormwater Flows in Concrete ...

Jan 22, 2021  Abstract: Concrete sewer pipes can be deteriorated by sulfuric acid (H2SO4), which is created by the oxidation of hydrogen sulfide in the presence of certain bacteria inside the sewers. This process is called biocorrosion. In this paper, H2SO4 (i.e., chemical, non-biogenic) was used to study acid attack on concrete samples.

get price

Spezialmontagen-John -- Concrete protection film

Preventive concrete protection. According to "statista", there will be 9400 biogas plants in Germany alone in 2020. All these plants in the agricultural, waste and energy industries face the same challenge: BSK, or Biogenic sulphuric acid corrosion (see below). Well-designed desulphurisation and preventive coating of the concrete are the ideal.

get price

The Role of Microorganisms in the Destruction of Concrete ...

Jan 04, 2021  The role of microorganisms in destructive processes occurring in concrete and reinforced concrete structures is considered. The mechanisms of microbiological effects on concrete surfaces and in the formation of microbial biofilms, are described. The main groups of corrosive microorganisms — in particular sulfur-oxidizing and sulfate-reducing microorganisms—are

get price

Nnadi, E. O. Lizarazo-Marriaga, J.

Acid corrosion of plain and reinforced concrete sewage systems ERNEST NNADI Coventry University, Coventry CV1 5FB – United Kingdom JUAN LIZARAZO-MARRIAGA Grupo de Investigación en Estructuras y Materiales – GIES, Universidad Nacional de Colombia, Bogotá ABSTRACT: The infrastructure of concrete sewage systems is affected notably by biogenic sulfuric acid attack,

get price

Cost of Corrosion Part 3 – Water and Wastewater ...

Concrete corrosion from sulphuric acid is problematic in sewer systems, where the H 2 S present in the wastewater reacts to form this acid. There are variations of corrosion from sulphuric acid that appear to be based on the source of the acid. Mineral acid attacks appear to have a different mode of action to that of biogenic acid attacks.

get price

Biogenic acid attack on concretes in biogas plants ...

Concretes in biogas plants (BGP) are subjected to chemical damage through acids which are formed by microbiological processes. Four-year-old grass silage clamp and different concretes samples were analysed. The tests allow statements on the plant-specific damage potential and the performance of the concretes used. Acetic and lactic acids were produced in the grass silage clamp through the ...

get price

Hydrogen Sulfide Corrosion In Wastewater Collection And ...

In general, the manholes were found to be corroded and in need of rehabilitation. Seventy-seven manholes had corroded barrels, and 66 had deteriorated frames. In the trunk sewer system, all reaches of reinforced concrete pipe (RCP) had lost from one to four inches of concrete due to corrosion.

get price