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Showing 1 to 20 of 142 for “"Disinfectant"”.
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Disinfectant Susceptibility of Mycobacterium avium
… chlorine compared to E. coli. M. avium CT99.9% (disinfectant concentration x time to 3 logs cell inactivation) values were between 571- and 2318 -times those of E. coli. Clinical isolates of M. avium showed 0.24 and 2.5-fold increase in resistance to chlorine compared to their …
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Effectiveness of Disinfectant Residuals in Distribution Systems
… drinking water systems in the United States, disinfectant is added to water as it leaves the plant to maintain a residual concentration in the distribution system. The disinfectant residual is maintained to inactivate contamination that enters the distribution system, to control biofilms, and …
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Developing a synthetic organophosphorus-based disinfectant for Canadian chicken hatcheries
… farmers to cull a portion of their flocks. Disinfectants used in hatcheries are effective, yet pathogens like E. cecorum remain problematic for both producers and hatcheries. A library of synthetic organophosphorus compounds possessing antimicrobial activities were evaluated as disinfectants …
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Disinfectant techniques commonly used in ambulances and other first response vehicles
… setting, as well as introduces newer disinfectant methods with the potential to further decontaminate ambulances. Commonly used disinfection techniques to clean ambulances include disinfectant-impregnated wipes and disinfectant sprays. There are disadvantages to using these wipes such …
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Development of a Broad Spectrum, Sporicidal, Cost Saving Disinfectant Incorporating a Novel Antimicrobial Catalyst
Introduction: Hospital infections are still a major burden within the health care sector. Without adequate infection control procedures such as hand washing and disinfection, this can lead to morbidity and mortality in the extremely ill or immunocompromised patients. A novel heterogeneous …
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Detergent effects on disinfectant susceptibility of Escherichia coli and listeria monocytogenes attached to stainless steel
… coli and Listeria monocytogenes to subsequent disinfectant treatment, in relation to food industry cleaning procedures. E. coli attached to stainless steel surfaces became significantly more susceptible to benzalkonium chloride (BAC) after treatment with sodium alkyl sulphate (SAS) by 0.51 …
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Effect of the water disinfectant chlorine dioxide on the integrity of a reverse osmosis membrane
Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Seth Robbins (robbins.sd@gmail.com) on 2014-05-30T17:10:15Z Item is restricted until 2016-05-30T17:09:03Z
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Towards Optimization of Residual Disinfectant Application for Mutual Control of Opportunistic Pathogens and Antibiotic Resistance in In-Building Plumbing
… OPPPs, and the relative resistance of OPPPs to disinfectants, and aging populations that are susceptible to infection. Concurrently, drinking water is increasingly being scrutinized as a potential environment that is conducive to horizontal gene transfer of antibiotic resistance genes (ARGs), …
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To devise a method of expressing the bactericidal efficiency of a disinfectant other than the standard F.D.A. phenol coefficienct method
Thesis (M.S.)--Michigan State College of Agriculture and Applied Science. Dept. of Bacteriology, 1940
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A Framework for Controlling Opportunistic Pathogens in Premise Plumbing Considerate of Disinfectant Concentration x Time (CT) and Shifts in Microbial Growth Phase
… U.S. and many other countries. While secondary disinfectant is added by utilities prior to water distribution through pipes, the residual in water at the property line is sometimes insufficient to suppress OP growth. Conditions encountered in premise plumbing can further diminish disinfectant in …
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Multivariate Analysis of Disinfection By-products Formation in Drinking Water Distribution Systems
… various chemical and microbial processes affect disinfectant residuals stability. This results in disinfectant residuals decay and unintended disinfection by-product (DBP) formations, which are associated with increased adverse health outcomes. To improve drinking water quality, in-depth …
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Impact of an Epoxy Pipe Lining Material on Distribution System Water Quality
… to reference tap waters containing one of three disinfectant treatments: no disinfectant, free chlorine, or chloramines. As a comparison, an aged epoxy-lined field sample was also tested. Water exposed to the liners under stagnant conditions was analyzed for the following water quality …
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Evaluation of the use of ferrous iron for chlorite removal under alkaline pH conditions
… much attention for use as a possible alternative disinfectant in water treatment plants due to concerns regarding trihalomethane formation in drinking waters which utilize chlorine as the primary disinfectant and the strict regulations regarding THM's and THMFP (MCL of 0.080 mg/L for TTHMs) …
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ADVANCED MODELING AND EFFICIENT OPTIMIZATION METHODS FOR REAL-TIME RESPONSE IN WATER NETWORKS
… effective mitigation procedures must be planned. Disinfectant booster stations can be used to neutralize a variety of contaminant and protect the public. In this thesis, two methods are proposed for the optimal placement of booster stations. Since the contaminant species is unknown a priori, these …
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Water Quality, Aesthetic, and Corrosion Inhibitor Implications of Newly Installed Cement Mortar Lining Used to Rehabilitate Drinking Water Pipelines
… This study investigated mortar lining impacts on disinfectant by-product formation, alkalinity, metal leaching, pH and disinfectant consumption, and odor generation shortly after in-situ installation. The experimental design used a 30-day, coupon immersion procedure that simulated a relined 4-inch …
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Opportunistic Pathogens and the Brain-eating Amoeba, Naegleria fowleri in Reclaimed Water, Municipal Drinking Water, and Private Well Water
… treatment to remove organic carbon and disinfectant type on the occurrence of OPs during distribution of reclaimed water. Laboratory-scale simulated reclaimed water distribution systems were employed to systematically examine the effects of prior granular activated carbon (GAC) …
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Critical factors controlling regrowth of opportunistic pathogens in premise plumbing
… order to examine the influence of pipe material, disinfectant type, and water age on occurrence and persistence of the target microorganisms, triplicate simulated distribution systems (SDSs) comparing iron, cement and PVC pipe materials were fed either chlorinated or chloraminated tap water, and …
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The role of biofilms in Legionella pneumophila transmission in drinking water distribution system
… near roughness asperities. Next, the effect of disinfectant exposure, an important parameter of drinking water quality, on biofilm structure and stiffness as well as the corresponding pathogen release and inactivation was identified. The biofilm thickness recovered during a long-term …
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Role of Extracellular Polymeric Substances (EPS) on Biofilm Disinfection in a Model Drinking Water Distribution System
… in a model distribution system with minimal disinfectant residuals. EPS contributed to bacterial surface properties, biofilm structural characteristics, disinfectant diffusion and reaction, organic matter retention and utilization, hence playing pivotal roles in bacterial resistance to …
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Electrodisinfection of Municipal Wastewater Effluent
… methods. Chlorine remains the predominant disinfectant used although it consumes considerable amounts of energy and has associated exposure risks from production, transportation and storage of this poisonous gas. In addition to bacteria and other objectionable microorganisms, color, …
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