Recent developments in biological nutrient removal
... are placed in a reactor and move freely throughout the entire aeration basin volume. Since these media move freely in the reactor, screens are required to retain them in the reactor so that they do not escape with the effluent. The approach velocity of the media to the screens is important and must ...
... are placed in a reactor and move freely throughout the entire aeration basin volume. Since these media move freely in the reactor, screens are required to retain them in the reactor so that they do not escape with the effluent. The approach velocity of the media to the screens is important and must ...
Minimizing Nitrogen Discharges from Onsite Wastewater Systems
... they may be a significant source. ...
... they may be a significant source. ...
Introduction to Waterborne Pathogens in - General Manual
... The goal of this technical note is to provide a survey of the on-farm beneficial practices that help reduce waterborne pathogens at their source, thereby reducing the overall pathogen load and waterborne contamination within an agricultural watershed. Reducing the pathogen load and contamination in ...
... The goal of this technical note is to provide a survey of the on-farm beneficial practices that help reduce waterborne pathogens at their source, thereby reducing the overall pathogen load and waterborne contamination within an agricultural watershed. Reducing the pathogen load and contamination in ...
Indoor Air Pollution
... Small public water works and private domestic wells often have closed systems and short transit times that do not allow radon to decay to harmless by-products before entering a home. Once inside, radon escapes from the water to the indoor air as people take showers, wash clothes or dishes, or other ...
... Small public water works and private domestic wells often have closed systems and short transit times that do not allow radon to decay to harmless by-products before entering a home. Once inside, radon escapes from the water to the indoor air as people take showers, wash clothes or dishes, or other ...
National Guidelines for the Control of Legionellosis in Ireland, 2009
... influenza-like illness, and legionnaires’ disease a more serious and potentially fatal form of the illness, characterised by pneumonia. Legionellosis is caused by Legionella bacteria which are ubiquitous in nature and can be found naturally in environmental water sources such as rivers, lakes and re ...
... influenza-like illness, and legionnaires’ disease a more serious and potentially fatal form of the illness, characterised by pneumonia. Legionellosis is caused by Legionella bacteria which are ubiquitous in nature and can be found naturally in environmental water sources such as rivers, lakes and re ...
Guideline for disinfection and sterilization in healthcare facilities 2008
... properly used, these cleaning, disinfection, and sterilization processes can reduce the risk for infection associated with use of invasive and noninvasive medical and surgical devices. However, for these processes to be effective, health-care workers should adhere strictly to the cleaning, disinfect ...
... properly used, these cleaning, disinfection, and sterilization processes can reduce the risk for infection associated with use of invasive and noninvasive medical and surgical devices. However, for these processes to be effective, health-care workers should adhere strictly to the cleaning, disinfect ...
Modeling the response of groundwater levels in wells to changes in
... For many practical situations, the effect of barometric pressure variations on the water level in a well has been ignored. However, in many cases, water levels in wells are observed to fluctuate significantly in response to changes in barometric pressure. In this study, a physically based conceptual ...
... For many practical situations, the effect of barometric pressure variations on the water level in a well has been ignored. However, in many cases, water levels in wells are observed to fluctuate significantly in response to changes in barometric pressure. In this study, a physically based conceptual ...
Infection Control Today - 03/2002: Follow Standard Precautions
... destroying microorganisms, and a temperature of at least 160ºF for a minimum of 25 minutes is commonly recommended for hot-water washing. Chlorine bleach provides an extra margin of safety. A total available chlorine residual of 50-150ppm is usually achieved during the bleach cycle. The last action ...
... destroying microorganisms, and a temperature of at least 160ºF for a minimum of 25 minutes is commonly recommended for hot-water washing. Chlorine bleach provides an extra margin of safety. A total available chlorine residual of 50-150ppm is usually achieved during the bleach cycle. The last action ...
A Novel Photocatalytic Conversion of Tryptophan to Kynurenine
... presence of oxygen. This lamp exhibits a remarkable irradiation in the UV-B region as shown from its wavelength distribution spectrum (Fig. 2) and hence tryptophan molecules can absorb photons with this energy and react. As a result of the photochemical oxidation of tryptophan; kynurenine—the desire ...
... presence of oxygen. This lamp exhibits a remarkable irradiation in the UV-B region as shown from its wavelength distribution spectrum (Fig. 2) and hence tryptophan molecules can absorb photons with this energy and react. As a result of the photochemical oxidation of tryptophan; kynurenine—the desire ...
polysphere danger peligro - Kelly Registration Systems
... IF ON SKIN OR CLOTHING: Take off contaminated clothing. Rinse skin immediately with plenty of water for 15-20 minutes. Call a poison control center or doctor for treatment advice. IF IN EYES: Hold eye open and rinse slowly and gently with water for 15-20 minutes. Remove contact lenses, if present, a ...
... IF ON SKIN OR CLOTHING: Take off contaminated clothing. Rinse skin immediately with plenty of water for 15-20 minutes. Call a poison control center or doctor for treatment advice. IF IN EYES: Hold eye open and rinse slowly and gently with water for 15-20 minutes. Remove contact lenses, if present, a ...
Dragon Fruit Foliage Plant-Based Coagulant for Treatment of
... e BOD results were taken aer 5-day incubation. e value of sulfate was performed using DR 2400 spectrophotometer. 10 mL of treated wastewater was added into the sample cell while deionized water was used for reference. Sulfate Ver 4 reagent powder pillow was also added, stirred, and then le for 5 ...
... e BOD results were taken aer 5-day incubation. e value of sulfate was performed using DR 2400 spectrophotometer. 10 mL of treated wastewater was added into the sample cell while deionized water was used for reference. Sulfate Ver 4 reagent powder pillow was also added, stirred, and then le for 5 ...
Organochlorine compounds in wastewater
... presence at measurable levels is virtually eliminated in ECF bleaching. The reduction in chlorinated organic by-products from use of chlorine dioxide occurs because, as the chlorine dioxide substitution level increases, the amount of chlorine available to react with lignin and other organic compound ...
... presence at measurable levels is virtually eliminated in ECF bleaching. The reduction in chlorinated organic by-products from use of chlorine dioxide occurs because, as the chlorine dioxide substitution level increases, the amount of chlorine available to react with lignin and other organic compound ...
ABSTRACT DOSIMETRIC STUDY OF BETA
... Brachytherapy, from the Greek word brachys, meaning “short-distance", is a form of internal radiotherapy, in which a short-range radiation source is placed inside or near the tumor. Brachytherapy can be used to treat several body sites and it has been used as an effective treatment for prostate, bre ...
... Brachytherapy, from the Greek word brachys, meaning “short-distance", is a form of internal radiotherapy, in which a short-range radiation source is placed inside or near the tumor. Brachytherapy can be used to treat several body sites and it has been used as an effective treatment for prostate, bre ...
Graywater safety
... Infants below the age of 6 months who drink water containing nitrate above the drinking water standard could become seriously ill. ...
... Infants below the age of 6 months who drink water containing nitrate above the drinking water standard could become seriously ill. ...
Analytical Technologies for Water Treatment Biofilms
... groups for which an isolation culture is difficult to achieve. For group analysis of such microbial bacteria, phylogenetic sorting analysis (bacteria flora analysis) based on nucleotide sequencing of bacteria DNA is widely used. Based on the result of this analysis, we carried out a systematic identifi ...
... groups for which an isolation culture is difficult to achieve. For group analysis of such microbial bacteria, phylogenetic sorting analysis (bacteria flora analysis) based on nucleotide sequencing of bacteria DNA is widely used. Based on the result of this analysis, we carried out a systematic identifi ...
Kaivac 1750 Brochure
... Kaivac’s science-based No-Touch Cleaning systems are designed from the start to remove the maximum amount of bio-pollution. They combine automatic chemical metering and injection, an indoor pressure washer and a powerful wet vacuum into an integrated system. Empowering workers to hygienically clean ...
... Kaivac’s science-based No-Touch Cleaning systems are designed from the start to remove the maximum amount of bio-pollution. They combine automatic chemical metering and injection, an indoor pressure washer and a powerful wet vacuum into an integrated system. Empowering workers to hygienically clean ...
Groundwater - CIRCABC
... 4.1(c) of Article 4 apply to the areas designated under the source Directives (that is, those noted in section 2.1 above). The standards and objectives for protected areas are distinct from status objectives. Measures to meet protected area objectives may be focused within, but not necessarily restr ...
... 4.1(c) of Article 4 apply to the areas designated under the source Directives (that is, those noted in section 2.1 above). The standards and objectives for protected areas are distinct from status objectives. Measures to meet protected area objectives may be focused within, but not necessarily restr ...
Exploris SectionI
... microorganisms living in the water. The microorganisms utilize the dissolved oxygen in the water to metabolize the organics for there own growth. As the biodegradable organics are consumed the oxygen level in the receiving water may be depleted to a level that does not support fish and other higher ...
... microorganisms living in the water. The microorganisms utilize the dissolved oxygen in the water to metabolize the organics for there own growth. As the biodegradable organics are consumed the oxygen level in the receiving water may be depleted to a level that does not support fish and other higher ...
The Carbon Footprint of Water
... will increase by 53% between 2003 and 2030. Much of the country is currently experiencing water shortages, with many of the fastest growing regions in the nation already withdrawing up to five times more water than is naturally replenished through precipitation.1 Meanwhile, the Intergovernmental Pan ...
... will increase by 53% between 2003 and 2030. Much of the country is currently experiencing water shortages, with many of the fastest growing regions in the nation already withdrawing up to five times more water than is naturally replenished through precipitation.1 Meanwhile, the Intergovernmental Pan ...
Biological Filters: Trickling and RBC Design
... by agitating the water in some fashion (Speece, et al., 1988; Parker, et al., 1984). Organic forms of nitrogen are rapidly broken down by bacteria in aquatic systems to inorganic forms of nitrogen; the primary inorganic form is ammonia. Aqueous ammonia can be toxic to fish and other aquatic organism ...
... by agitating the water in some fashion (Speece, et al., 1988; Parker, et al., 1984). Organic forms of nitrogen are rapidly broken down by bacteria in aquatic systems to inorganic forms of nitrogen; the primary inorganic form is ammonia. Aqueous ammonia can be toxic to fish and other aquatic organism ...
Membrane bioreactor system for treating synthetic oilfield
... operated in atmospheric pressure. Oxygen is provided by air pump 6 and air diffuser inside the fermenter to maintain dissolved oxygen 2-3 mg/l. The bioreactor includes baffles to increase contacting wastewater with the microorganisms. Components of wastewater are mixed in a propylene container 14 wi ...
... operated in atmospheric pressure. Oxygen is provided by air pump 6 and air diffuser inside the fermenter to maintain dissolved oxygen 2-3 mg/l. The bioreactor includes baffles to increase contacting wastewater with the microorganisms. Components of wastewater are mixed in a propylene container 14 wi ...
Guideline for the Prevention of Infection from Water Systems in
... Each healthcare institution is responsible for the quality of water once it enters its building(s) (CEO, HSE (HBS) Estates Department, maintenance/engineering department/facilities management) Employers, including those with responsibility for managing healthcare facilities, have a duty to ensur ...
... Each healthcare institution is responsible for the quality of water once it enters its building(s) (CEO, HSE (HBS) Estates Department, maintenance/engineering department/facilities management) Employers, including those with responsibility for managing healthcare facilities, have a duty to ensur ...
Use of ozone in the food industry
... equipment. Even though chlorine sanitizers have several disadvantages including being harmful and irritating in high concentrations, being prone to forming carcinogenic compounds and being toxic to the environment, these compounds are economical bactericides that inactivate all types of vegetative c ...
... equipment. Even though chlorine sanitizers have several disadvantages including being harmful and irritating in high concentrations, being prone to forming carcinogenic compounds and being toxic to the environment, these compounds are economical bactericides that inactivate all types of vegetative c ...
PROJECT - Barnstable County
... restriction to a 30ft culvert which would result in better flushing and somewhat higher surface water flows during high and storm tides. The Town and MEP also evaluated the potential environmental impacts of increasing the tidal flow on nearby resources including homes and septic systems and found t ...
... restriction to a 30ft culvert which would result in better flushing and somewhat higher surface water flows during high and storm tides. The Town and MEP also evaluated the potential environmental impacts of increasing the tidal flow on nearby resources including homes and septic systems and found t ...
Ultraviolet germicidal irradiation
Ultraviolet germicidal irradiation (UVGI) is a disinfection method that uses short-wavelength ultraviolet (UV-C) light to kill or inactivate microorganisms by destroying nucleic acids and disrupting their DNA, leaving them unable to perform vital cellular functions. UVGI is used in a variety of applications, such as food, air, and water purification. UV-C light is weak at the Earth's surface as the ozone layer of the atmosphere blocks it. UVGI devices can produce strong enough UV-C light in circulating air or water systems to make them inhospitable environments to microorganisms such as bacteria, viruses, molds and other pathogens. UVGI can be coupled with a filtration system to sanitize air and water.The application of UVGI to disinfection has been an accepted practice since the mid-20th century. It has been used primarily in medical sanitation and sterile work facilities. Increasingly it has been employed to sterilize drinking and wastewater, as the holding facilities are enclosed and can be circulated to ensure a higher exposure to the UV. In recent years UVGI has found renewed application in air purifiers.