drinking water THMs Articles
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Total trihalomethane measurement using a reagentless and contactless analyser developed by Multisensor Systems Ltd.
Abstract Awareness of risks associated with THMs in drinking water has increased steadily over the course of the last three decades. A number of technologies have been developed to provide Water Treatment Plants with the tools to perform on-line monitoring of THMs in drinking water. This article describes the state of art of on-line THM analysers and focuses on the e-nose based system. Data from ...
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Method for trihalomethane analysis in drinking water by solid-phase microextraction with gas chromatography and mass spectrometry detection
Headspace solid-phase microextraction coupled with gas chromatography and mass spectrometry detection (HS/SPME-GC/MSD) was optimized for trihalomethane (THM) determination in drinking water. A 75 μm fiber coated with carboxen/polydimethylsiloxane (75-CAR.PDMS) was used. Experimental parameters such as sample volume, time and temperature of extraction, time and temperature of desorption, ...
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THM monitoring in a drinking water plant in the east of Spain - Case Study
APPLICATION Online THM monitoring at a drinking water plant. CUSTOMER Water Utility PROBLEM The local health authority had warned that the THM level in the water supplied to households in the region was above or near the limit imposed by the law. For this reason, the local WTP was asked to install an on-line THM monitoring system and implement improved control of the ...
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Alternative Regenerants
The MIEX® Technology was originally designed for the removal of dissolved organic carbon (DOC), a precursor tothe formation of THMs and HAAs, from drinking water supplies. More recently, the MIEX® Technology is finding many more applications for the removal of a range of contaminants across many industries. Traditionally, DOC-loaded MIEX® Resin has been regenerated using brine, a concentrated ...
By Ixom
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Control of disinfection byproduct (DBP) precursors by soil aquifer treatment (SAT): what length of hydraulic retention time (HRT) is necessary?
The study attempted to determine the hydraulic retention time (HRT) required for soil aquifer treatment (SAT) to reclaim water as potable water in an aspect of controlling disinfection byproduct (DBP) precursors. In order to evaluate the removal of DBP precursors, the uniform formation condition was used to estimate the formations of trihalomethanes (THMs) and haloacetic acids (HAAs). ...
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Advanced Oxidation Pretreatment
The MIEX®DOC Technology was designed for the removal of dissolved organic carbon (DOC), a precursor to the formation of THMs and HAAs, from drinking water supplies. More recently, the MIEX® Technology is finding many more applications for the removal of a range of contaminants across many industries. Occasionally, there are waters where the removal of DOC or other dissolved organic compounds ...
By Ixom
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Santa Cruz Meets THM/DBP Challenge with Unique Air Stripping Process - Case Study
Summary Santa Cruz has successfully demonstrated an innovative way for the City to meet its water quality goals while using process recycled water as part of its supply source. Using the recycled water had caused concern about reliably meeting the U.S. EPA THM/DBP potable water quality standards in its finished water. The City evaluated various aeration treatment processes and chose an E-Z ...
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Catalytic Carbons Help Remove Chloramine
Untitled Document Summary: Where chlorine creates high levels of trihalomethanes (THMs), chloramine can be an alternative for disinfecting drinking water. Removing it at the point of use (POU), however, can be more difficult than removing chlorine. When your job requires chloramine removal, you may consider using catalytic activated carbons. To view ...
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Health effects of disinfection by-products in Australian drinking waters
The disinfection of drinking water has greatly diminished the occurrence of diseases known to be caused by water-borne pathogens, but technological advances subsequent to the initial discovery of chloroform in 1974 have enabled the identification of a plethora of Disinfection By-Products (DBPs), particularly trihalomethanes (THMs), that may have injurious health effects on humans. DBPs are widely ...
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Trihalomethane Removal In Municipal Drinking Water Storage Tanks
There are many, many considerations to take into account when researching and implementing a trihalomethane (THM, TTHM) removal strategy for your drinking water system. It can all get very complex in a hurry. For the sake of this blog article however, we are going to focus only on THM volatilization removal strategies through the prism of water surface area. THM Removal Via Volatilization ...
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Potable tank mixing & THM removal - Case study
Topics: potable, THM removal, TTHM, stratification/water age, chlorine Overview: This location consists of three potable water tanks serving the potable water needs of a city. These three tanks, Tanks 100, 110 & 120, are steel ground storage tanks with an average capacity of 2.4 MG, average tank height of 24 ft. and an average diameter of 134 ft. The average flow rate is 355,000 gpd ...
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Should We Be Concerned About Disinfection Byproducts?
Chlorinating water can lead to the formation of harmful compounds, but there are treatment alternatives Water utilities often chlorinate drinking water to kill pathogens that could pose a risk to human health. However, when chlorine is used to treat water, it can cause a chemical reaction with natural inorganic or organic compounds, which may be derived from decaying plants, algae, or animal ...
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Potable tank reservoirs 6, 8, & 15 - Case study
Topics: potable, THM removal, TTHM, stratification/water age, short-circuiting, chlorine Overview: The water treatment system includes three potable water storage reservoirs (Reservoirs 6, 8 and 15) where chlorine boosting occurs before water is distributed to the community. Reservoir 6 is a 3.5 MG concrete storage tank with a height of 30 feet, a diameter of 143 feet, and a maximum daily flow ...
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Potable tank mixing & THM removal - Case study
Topics: potable, THM reduction, TTHM, stratification/water age, chloramine Overview: This tank is a multi-leg, torus-bottom tank with a capacity of 300,000 gallons. Overall tank height is 84 ft.; the wet riser height is 49 ft. and the height of the bowl is 35 ft. The maximum fill rate is 560 GPM, and typical inflow is estimated at 300,000 GPD. The water source for the treatment plant is a ...
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THM Removal in Potable Water Storage Tanks - Case Study
City tests various trihalomethane removal systems to ensure full EPA compliance. Topics: trihalomethane, THM, TTHM, spray aeration, potable water tanks, GridBee® SN Series THM Removal System Project Overview: This location had a tank battery of four similar 1.5 MG bolted steel tanks installed serving as temporary storage during the planning & construction of two 6 MG pre-stressed ...
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THM Prevention & DOC Remova Drinking Water - Case Study
Cuf was sole sourced for a drinking water facility as it had unmatched purification performance and was the only viable solution for the trend of stricter regulations for reductions in color, THMs, and liquid waste. Cuf achieves all of these water purification requirements and provides an essentially Zero Liquid Discharge solution. A 1 MGD well has been brought online to reduce the demand on its ...
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