Development of point-of-use water disinfection technology using ceramic water filter and electrochemical hybrid system

2013 ◽  
Vol 13 (4) ◽  
pp. 1174-1180
Author(s):  
Y. J. Yoon ◽  
M. H. Kwon ◽  
Y. M. Jung ◽  
J. H. Moon ◽  
J. W. Kang
Keyword(s):  
Hybrid System ◽  
Environmental Protection Agency ◽  
Microbial Inactivation ◽  
Water Disinfection ◽  
Escherichia Coli O157 ◽  
Protection Agency ◽  
Water Filter ◽  
Point Of Use ◽  
The Us ◽  
By Products

The efficiency of water disinfection using a ceramic water filter and electrochemical hybrid system was investigated. Escherichia coli O157:H7 was effectively inactivated even when a storage battery, charged using a solar panel device, was used for the electrolysis process. During electrolysis, the rate of microbial inactivation was higher at higher initial Cl− concentrations. This was because of the higher CT value (the disinfectant concentration, C [mg/L], multiplied by the exposure time, T [min]) of free chlorine. Microorganisms were effectively inactivated under low pH and high temperature conditions. Disinfection by-products, such as trihalomethanes (THMs) and haloacetic acids (HAAs), were below the standard concentrations allowed in drinking water by the US Environmental Protection Agency.

Survey of Trihalomethanes and Other Volatile Chemical Contaminants in Processed Foods by Purge-and-Trap Capillary Gas Chromatography with Mass Selective Detection

1995 ◽  
Vol 78 (2) ◽  
pp. 391-397 ◽  
Author(s):  
Timothy P Mcneal ◽  
Henry C Hollifield ◽  
Gregory W Diachenko
Keyword(s):  
Environmental Protection Agency ◽  
Water Disinfection ◽  
Protection Agency ◽  
Chemical Contaminants ◽  
Purge And Trap ◽  
Volatile Organic ◽  
Canned Foods ◽  
Residue Levels ◽  
Gas Chromatographic Method ◽  
By Products

Abstract A limited number of soft drinks, juices, beers, and waters from processed vegetables were analyzed for trihalomethanes (THMs), benzene, and toluene by a modified Environmental Protection Agency (EPA) Method 524.2. The THMs, which include chloroform, bromodichloromethane, dibromochloromethane, and bromoform, are reaction by-products of water disinfection by chlorination. EPA Method 524.2 is a purge-and-trap capillary gas chromatographic method based on mass spectrometric detection which identifies and simultaneously measures purgeable volatile organic compounds in drinking water. Chloroform was present at concentrations ranging from none detected to 94 ng/g in the 44 foods analyzed. Bromoform was not found in any of the products at a detection limit of 0.1 ng/g. Residue levels of the other THMs ranged from none detected to highs of 12 and 2 ng/g for bromodichloromethane and drbromochloromethane, respectively. Benzene residues were typically <5 ng/g, except for 7 and 9 ng/g in 2 foods. Toluene residues were typically ≤3 ng/g except for 23,29, and 75 ng/g in 3 canned foods.

scholarly journals Benefits of Electrified Powertrains in Medium- and Heavy-Duty Vehicles

2020 ◽  
Vol 11 (1) ◽  
pp. 12
Author(s):  
Ram Vijayagopal ◽  
Aymeric Rousseau
Keyword(s):  
Environmental Protection ◽  
Environmental Protection Agency ◽  
Fuel Saving ◽  
Heavy Duty ◽  
Protection Agency ◽  
Light Duty ◽  
Design Choice ◽  
The Us ◽  
Light Duty Vehicles ◽  
Heavy Duty Vehicles

The benefits of electrified powertrains for light-duty vehicles are well understood, however sufficient published information is not available on the benefits of advanced powertrains on the various types of medium and heavy duty vehicles. Quantifying the benefits of powertrain electrification will help fleet operators understand the advantages or limitations in adopting electrified powertrains in their truck fleets. Trucks vary in size and shape, as they are designed for specific applications. It is necessary to model each kind of truck separately to understand what kind of powertrain architecture will be feasible for their daily operations. This paper examines 11 types of vehicles and 5 powertrain technology choices to quantify the fuel saving potential of each design choice. This study uses the regulatory cycles proposed by the US Environmental Protection Agency (EPA) for measuring fuel consumption.

scholarly journals Research on the Construction Method of the Service-Oriented Web-SWMM System

2019 ◽  
Vol 8 (6) ◽  
pp. 268 ◽  
Author(s):  
Dawei Xiao ◽  
Min Chen ◽  
Yuchen Lu ◽  
Songshan Yue ◽  
Tao Hou
Keyword(s):  
Environmental Protection Agency ◽  
Global Scale ◽  
Management Model ◽  
Urban Flooding ◽  
Rainfall Runoff ◽  
Protection Agency ◽  
Runoff Simulation ◽  
Storm Water Management Model ◽  
The Us ◽  
Service Oriented

On a global scale, with the acceleration of urbanization and the continuous expansion of cities, the problem of urban flooding has become increasingly prominent. An increasing number of experts and scholars have begun to focus on this phenomenon and build corresponding models to solve the problem. The storm water management model 5 (SWMM5) is a dynamic rainfall-runoff simulation model developed by the US Environmental Protection Agency (EPA); this model simulates urban flooding and drainage well and is widely favored by researchers. However, the use of SWMM5 is relatively cumbersome and limited by the operational platform, and these factors hinder the further promotion and sharing of SWMM5. Based on the OpenGMS platform, this study first encapsulates, deploys, and publishes SWMM5 and further builds the Web-SWMM system for the model. With Web-SWMM, the user can conveniently use network data resources online and call SWMM5 to carry out calculations, avoiding the difficulties caused by the localized use of SWMM5 and enabling the sharing and reuse of SWMM5.

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