biofilm Articles
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Recovery of
Salmonella from biofilms in a headwater spring ecosystemSalmonellae are pathogenic bacteria often detected in waters impacted by human or animal wastes. In order to assess the fate of salmonellae in supposedly pristine environments, water and natural biofilm samples along with snails (Tarebia granifera) and crayfish (Procambarus clarkia) were collected before and up to 7 days following four precipitation events from sites within the headwater springs ...
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Kinetics of aerobic oxidation of volatile sulfur compounds in wastewater and biofilm from sewers
Laboratory experiments were conducted to investigate the kinetics of aerobic chemical and biological oxidation of selected odorous volatile sulfur compounds (VSCs) by wastewater and biofilm from sewers. The VSCs included methyl mercaptan (MeSH), ethyl mercaptan (EtSH), dimethyl sulfide (DMS) and total inorganic sulfide, which have all been reported as the main constituents of foul sewer gas. ...
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Microbial control reduces sulfide
The article is about sewage odour control using a totally NEW technology known as Microbial Control. Microbial control treats the cause of sewage odour, corrosion and methane gas production in sewers by removing the biofilm / sediment (slimes) complexes where sewage odour and methane gas are produced. Without sewage odour you cannot have sewage infrastructure corrosion from sulfuric acid. As ...
By Biosol
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Selection of Bioreactor Media for Odor Control
The support media is one of the most critical elements of a biofiltration system. In this chapter, biofilters and biotrickling filters will be referred to as “biofilter”, and this distinction will be discussed later in this chapter. The support media’s main function is to provide contact between the gas-phase contaminants and active microbial cultures either immobilized within and/or attached as ...
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Nitrification processes in scrubbing liquid of an exhaust air treatment system of a large-scale pig housing facility
The use of multi-staged exhaust air treatment systems is an effective method of substantially reducing the emission of ammonia, dust particles and odorous substances. Wet filter walls are able to absorb large amounts of ammonia when scrubbing fluid containing sulphuric acid is used. In addition, due to their large surface areas and the permanent supply of oxygen and nutrients, wet filter walls ...
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Elimination of NH3 and odor from composting by biotrickling filter and preliminary exploration on molecular biology
A biotrickling filter was focused on treatment of odorous NH3 gas, along with volatile organic compounds (VOCs) and other odorous gases during cattle manure composting. The biotrickling filter could treat NH3, the main composition, with removal efficiencies of close to 100% because NH4+ was bio-oxidized in the biofilm to NO3− resulting final NO3− concentrations of about 1000 mg/L. Results of ...
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Removal of geosmin and 2-methylisoborneol through biologically active sand filters
The removal of taste and odour compounds from drinking water is a constant challenge to water authorities. Although adverse odours do not present a risk to human health, their presence often leads to a misconception that the water is unsafe for drinking. 2-Methylisoborneol (MIB) and geosmin are the most common causes of earthy/musty odour, and are not easily removed by conventional treatment ...
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Algae control in drinking water treatment - case study
For the Ministry of Agriculture in Cyprus, LG Sound b.v installed 33 LG Sonic, ultrasonic devices in the Limassol water treatment plant, to prevent bad odour and taste to the water caused by geosmins in the water. The earthy taste problem persisted during summer of 2010 and various physical, chemical and biological tests were done in order to check the process efficiency, which showed problems ...
By LG Sonic
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Q-PAC® supports biological growth for BOD reduction
Patented Bioreactor uses Q-PAC Randomly Packed Media in Application of Specific Bacterial Cultures for Treating High Strength Industrial Waste for BOD and Odor Reduction in a Cheese Manufacturing Plant A cheese manufacturer in Upstate New York with one three million gallon lagoon is testing a bioreactor (TVTBIO 32) from TVT US Corporation. The concept is essentially the same as bacteria eating ...
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City uses digesters to rid lift stations of hydrogen sulfide - Case Study
Problem The city of Taylorville (Illinois) Street/Sewer Department faced issues with hydrogen sulfide in three lift stations and with biofilms further downstream in the delivery piping to the wastewater treatment plant. The discharge manhole H2S readings were over 700 ppm, and local residents complained of odors. Solution The city purchased three Little John Digesters from D02E Wastewater ...
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City uses digesters to rid lift stations of hydrogen sulfide – Case Study
Problem The city of Taylorville (Illinois) Street/Sewer Department faced issues with hydrogen sulfide in three lift stations and with biofilms further downstream in the delivery piping to the wastewater treatment plant. The discharge manhole H2S readings were over 700 ppm, and local residents complained of odors. Solution The city purchased three Little John Digesters from D02E Wastewater ...
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SCORe-CT: a new method for testing effectiveness of sulfide-control chemicals used in sewer systems
A new method for testing the effectiveness of chemical products for sulfide control in sewers is reported. The method, called SCORe-CT (Sewer Corrosion and Odour Research – Chemical Testing), consists of two specially designed laboratory-scale systems that mimic sulfide production in real rising main sewers, and a multi-phase and multi-facet testing protocol. The monitoring tools/methods include ...
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Algae and Biofilm control project for a drinking water treatment plant in Cyprus
For the Ministry of Agriculture in Cyprus, LG Sound b.v installed 33 LG Sonic, ultrasonic devices in the Limassol water treatment plant, to prevent bad odour and taste to the water caused by geosmins in the water. The earthy taste problem persisted during summer of 2010 and various physical, chemical and biological tests were done in order to check the process efficiency, which showed problems ...
By LG Sonic
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Extended CSO control storage: what could possibly go wrong?
The Thames Tideway Tunnel (TTT), is one of the main components of the London Tideway Improvements Programme, designed to capture combined sewer overflows (CSOs) which currently discharge untreated combined sewage into the tidal river Thames. CSO discharges would be stored in the tunnel until there is capacity at Beckton sewage treatment works (STW), to accept, for treatment, pumped sewage ...
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Advanced Oxidant using Mineral Oxychloride Technology
Jenfitch, based in Walnut Creek, California, has developed a new oxidant that is effective at lower TOC, reducing THM’s and HAA5’s, eliminating T & O (taste and odors), effective at controlling HAB’s (harmful algal blooms), effective at controlling zebra mussels and other shellfish encrustation, effective at improving coagulation & flocculation, eliminating biofilm ...
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Synthetic media biofilter eliminates hydrogen sulphide and other reduced sulphur compound odours
Abstract Innovative synthetic biofilter media has revolutionized biofilter technology for removal of hydrogen sulphide (H:S) odours from several wastewater treatment facilities across North America. The major drawback of biofilter technology in the past was use of organic wood-based media, which had several problems including high-pressure drop, frequent media replacement, lack of nutrients, ...
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Application fields of biological deodorization equipment
What is biological deodorization equipment? Biological deodorization equipment uses biological fillers as carriers to enable microorganisms to form biofilms on the surface of biological fillers in a suitable environment. Microorganisms in biofilms use inorganic and organic substances in waste gas as carbon sources and energy sources, and maintain odor by degrading odorous substances. It is an ...
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Opportunistic pathogens relative to physicochemical factors in water storage tanks
Household water in Oman, as well as in other countries in the region, is stored in tanks placed on house roofs that can be subjected to physicochemical factors which can promote microbial growth, including pathogens and opportunistic pathogens which pose health risks. Water samples were collected from 30 houses in a heavily populated suburb of Muscat. The tanks used were either glass reinforced ...
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ROS improves ozone system in a surface water treatment plant - Case Study
Jenfitch, Inc based in Walnut Creek, CA has developed a new oxidant that is effective at lowering TOC, reducing THM’s and HAA5’s, eliminating T & O (taste and odors), effective at controlling HAB’s (harmful algal blooms), improve coagulation & flocculation, eliminate biofilm formation in the distribution systems, and improve the effectiveness of your primary ...
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Municipal wastewater treatment plants as pathogen removal systems and as a contamination source of noroviruses and
Enterococcus faecalis Municipal wastewater treatment plants play a crucial role in reducing the microbial and pathogen load of human wastes before the end-products are discharged to surface waters (final effluent) or land spread (biosolids). This study investigated the occurrence frequency of noroviruses, Enterococcus faecalis and Enterococcus faecium in influent, final effluent and biosolids from four secondary ...
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