water treatment training Articles
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Identification and assessment of water quality risks associated with sludge supernatant recycling in the presence of cyanobacteria
This study focussed on the fate of cyanobacteria cells and associated metabolites during the sludge management processes that follow the conventional drinking water treatment train. The topic is of importance, as the release of metabolites during sludge treatment may pose a risk to water quality if supernatant is recycled to the head of the plant. The study of the kinetics of cell damage and ...
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Removal of NOM-constituents as characterized by LC-OCD and F-EEM during drinking water treatment
Natural organic matter (NOM) is of concern in drinking water because it causes adverse aesthetic qualities such as taste, odour, and colour; impedes the performance of treatment processes; and decreases the effectiveness of oxidants and disinfectants while contributing to undesirable disinfection by-products. The effective removal of NOM during drinking water treatment requires a good ...
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Tracking disinfection by-products and arsenic removal during various drinking water treatment trains
In the central Banat region (Northern Serbia), groundwater is used as a drinking water source. Raw water originates from a 40–80 m and 100–150 m deep layer. It contains a high amount of natural organic matter (DOC = 9.17±0.87 mg C/L) with a trihalomethanes formation potential of 448±88.2 μg/L and a haloacetic acid formation potential of 174±68.9 μg/L. A high amount of arsenic (86.0±3.4 μg/L) is ...
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Students tackle disinfection issues using drinking water treatment simulator
In a recent innovative assignment, Civil Engineering students at the University of Toronto pooled their talents to address a growing drinking water issue. Teams of students in the graduate course taught by Dr. Robert Andrews used computer simulation to determine how best to optimize a water treatment plant to meet tough new standards for disinfectant residual and disinfectant by-product (DBP) ...
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Dissolved organic nitrogen (DON) in a full-scale drinking water treatment plant
Dissolved organic nitrogen (DON) is currently considered as one of the most important parameters in drinking water treatment due to its potential to form toxic nitrogenous disinfection by-products (N-DBPs). A comprehensive investigation was made in this study on the variation of DON in a full-scale drinking water treatment plant with a treatment train of coagulation/sedimentation, biofiltration ...
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Recycle of waste backwash water in ultrafiltration drinking water treatment processes
In drinking water treatment, ultrafiltration (UF) membrane systems are generally operated at 90 to 95% recovery with production losses resulting from waste residual streams such as backwash water and clean-in-place (CIP) liquid residuals. In drought-prone regions, it may be desirable to apply alternative UF plant design configurations to increase recovery rates and minimize water loss. This ...
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(Yet more) challenges for water treatment plants: potential contribution of hypochlorite solutions to bromate, chlorate, chlorite and perchlorate in drinking water
The aim of this study was to evaluate if chlorate, chlorite, perchlorate and bromate ions are found in treated water from 16 Canadian drinking water treatment plants (WTPs) that use hypochlorite as a disinfectant. The WTPs in this survey had unusually high concentrations of sodium, bromide and dissolved organic carbon in the source water and all used ammonium in the treatment train. Samples ...
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Large Midwestern Electronics Div. of a Transportation Co. uses a local regeneration company that mistakenly mixes water purification resin with lead treated resin
"I just called a local water treatment dealer and a salesperson came to discuss the application. He recommended his fiberglass tanks for my operation..." discussion: A manufacturing engineer contacts a major USA water purification company with a local regeneration dealership to get a DI water supply for his cleaner. The dealership is an independently owned franchise that does not handle ...
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PGCCA winners of Yore: Where are they now?
With the 20th Annual Presidential Green Chemistry Challenge Awards (PGCCA) ceremony drawing near, the Biobased and Renewable Products Advocacy Group's (BRAG®) Biobased News and Policy Report decided to go back and revisit some early winners to see what has become of the award-winning product or technology. We will be running a new story each week as we approach this year's awards ceremony, ...
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EDI - High Purity Water Production Depends on It
In the 1950s', electrodeionization (EDI) technology was invented in an attempt to minimize or eliminate polarization phenomenon concentrations that were present in electrodialysis systems. Decades later, the technology was applied to polish reverse osmosis product water and generate chemical free high purity water. Today, many OEMs use EDI. Electrodeionization technology uses ion-exchange resin ...
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Pilot projects provide insights on potable water reuse
Recycling wastewater is becoming more and more important, but it’s rarely consumed directly. What’s more common is direct potable reuse, a process in which wastewater is treated to drinkable standards. Instead of being injected into an aquifer or an environmental buffer, the treated water is commonly either distributed upstream of a drinking water treatment plant or added directly ...
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Demonstration of Resin Adsorption Techology for Treatment of VOCs in Groundwater
Untitled Document ABSTRACT Aberdeen Proving Ground (APG) has been a center for the development, testing, and manufacture of military-related chemicals since World War I, with industrial activities concentrated in the Canal Creek Area. Groundwater at APG has been impacted by these historical practices. The APG Installation Restoration Program (IRP) is ...
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The Benefits of an Integrated Air and Water Pollution Control Partner
Although there has been substantial progress during the past several decades in reducing pollution, the EPA, other federal agencies and local governments continue to add and revise requirements and standards, making compliance a challenge for the industrial sector. These companies also face increasing public pressure not just to meet but to exceed pollution control standards, as studies continue ...
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