End-User Preferences for and Performance of Competing POU Water Treatment Technologies among the Rural Poor of Kenya

2010 ◽  
Vol 44 (12) ◽  
pp. 4426-4432 ◽  
Author(s):  
Jeff Albert ◽  
Jill Luoto ◽  
David Levine
Keyword(s):  
Water Treatment ◽  
User Preferences ◽  
Rural Poor ◽  
End User ◽  
Treatment Technologies ◽  
And Performance

scholarly journals Independent Assessment of the Energy Savings, Environmental Improvements and Water Conservation of Emerging Non-Chemical Water Treatment Technologies

2010 ◽  
Author(s):  
Michael Gravely ◽  
Bruce La Belle ◽  
John Balachandra
Keyword(s):  
Water Treatment ◽  
Water Conservation ◽  
Energy Savings ◽  
Emerging Technologies ◽  
End User ◽  
Technical Paper ◽  
California Energy Commission ◽  
Treatment Technologies ◽  
Independent Assessment ◽  
Chemical Water

This paper discusses the results of a project funded by the California Energy Commission Public Interest Energy Research (PIER) to complete an independent assessment of the energy savings, environmental improvements and water conservation capabilities of emerging non-chemical water treatment technologies. The project was completed by a team from California State University at Sacramento and included a technical review of the emerging technologies and a detailed assessment of the emerging non-chemical water treatment technology. Clearwater Systems, Corp. The research was focused on gathering information from industrial field customers who had purchased and installed these systems and had actual experience with their operational characteristics from several months to several years. The team completed a telephone survey with approximately 15 end user customers and made site visits to ten sites. Some limited independent water testing was also completed. The results of these phone surveys and site visits were consolidated and placed in an interim report. Even though only a small number of end user customers were actually surveyed or visited, the research indicated that several hundred systems have been successfully installed in California and throughout the United States. The emerging technologies provide nonchemical treatment for cooling tower and evaporative condenser system water. All the information collected and results derived from this effort will be made available to the public later this year in the form of a PIER Technical Report. A Project Advisory Committee that included representatives from CalEPA, the Energy Commission PIER Program and local utilities supported this team. Disclaimer: This technical paper is a result of work sponsored by the California Energy Commission and does not necessarily represent the views of the Energy Commission, its employees or the State of California. This technical paper has not been approved or disapproved by the California Energy Commission nor has the Energy Commission passed upon the accuracy or adequacy of the information in this technical paper. Paper published with permission.

Low Pd loadings onto Printex L6: Synthesis, characterization and performance towards H2O2 generation for electrochemical water treatment technologies

Chemosphere ◽  
2020 ◽  
Vol 259 ◽  
pp. 127523
Author(s):  
Guilherme V. Fortunato ◽  
Matheus S. Kronka ◽  
Alexsandro J. dos Santos ◽  
Marc Ledendecker ◽  
Marcos R.V. Lanza
Keyword(s):  
Water Treatment ◽  
H2o2 Generation ◽  
Treatment Technologies ◽  
And Performance

scholarly journals Methods, Protocols, Guidance and Standards for Performance Evaluation for Point-of-Use Water Treatment Technologies: History, Current Status, Future Needs and Directions

Water ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1094
Author(s):  
Emily S. Bailey ◽  
Nikki Beetsch ◽  
Douglas A. Wait ◽  
Hemali H. Oza ◽  
Nirmala Ronnie ◽  
...  
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Enteric Bacteria ◽  
Current Status ◽  
Household Water Treatment ◽  
Produce Water ◽  
Point Of Use ◽  
Treatment Technologies ◽  
Injury And Repair ◽  
Testing Protocols

It is estimated that 780 million people do not have access to improved drinking water sources and approximately 2 billion people use fecally contaminated drinking water. Effective point-of-use water treatment systems (POU) can provide water with sufficiently reduced concentrations of pathogenic enteric microorganisms to not pose significant health risks to consumers. Household water treatment (HWT) systems utilize various technologies that physically remove and/or inactivate pathogens. A limited number of governmental and other institutional entities have developed testing protocols to evaluate the performance of POU water treatment systems. Such testing protocols are essential to documenting effective performance because inferior and ineffective POU treatment technologies are thought to be in widespread use. This critical review examines specific practices, procedures and specification of widely available POU system evaluation protocols. Testing protocols should provide standardized and detailed instructions yet be sufficiently flexible to deal with different treatment technologies, test microbe priorities and choices, testing facility capabilities and public health needs. Appropriate infectivity or culture assays should be used to quantify test enteric bacteria, viruses and protozoan parasites, or other appropriate surrogates or substitutes for them, although processes based on physical removal can be tested by methods that detect microbes as particles. Recommendations include further research of stock microbe production and handling methods to consistently yield test microbes in a realistic state of aggregation and, in the case of bacteria, appropriately physiologically stressed. Bacterial quantification methods should address the phenomenon of bacterial injury and repair in order to maximally recover those that are culturable and potentially infectious. It is only with harmonized national and international testing protocols and performance targets that independent and unbiased testing can be done to assure consumers that POU treatment technologies are able to produce water of high microbial quality and low health risk.

scholarly journals Long-lasting, monovalent-selective capacitive deionization electrodes

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Eric N. Guyes ◽  
Amit N. Shocron ◽  
Yinke Chen ◽  
Charles E. Diesendruck ◽  
Matthew E. Suss
Keyword(s):  
Water Treatment ◽  
Ionic Conductivity ◽  
Ion Selectivity ◽  
Single Step ◽  
Carbon Electrodes ◽  
Capacitive Deionization ◽  
Treatment Technologies ◽  
Porous Carbon Electrodes ◽  
Monovalent Ion ◽  
Direct Use

AbstractEmerging water purification applications often require tunable and ion-selective technologies. For example, when treating water for direct use in irrigation, often monovalent Na+ must be removed preferentially over divalent minerals, such as Ca2+, to reduce both ionic conductivity and sodium adsorption ratio (SAR). Conventional membrane-based water treatment technologies are either largely non-selective or not dynamically tunable. Capacitive deionization (CDI) is an emerging membraneless technology that employs inexpensive and widely available activated carbon electrodes as the active element. We here show that a CDI cell leveraging sulfonated cathodes can deliver long-lasting, tunable monovalent ion selectivity. For feedwaters containing Na+ and Ca2+, our cell achieves a Na+/Ca2+ separation factor of up to 1.6. To demonstrate the cell longevity, we show that monovalent selectivity is retained over 1000 charge–discharge cycles, the highest cycle life achieved for a membraneless CDI cell with porous carbon electrodes to our knowledge, while requiring an energy consumption of ~0.38 kWh/m3 of treated water. Furthermore, we show substantial and simultaneous reductions of ionic conductivity and SAR, such as from 1.75 to 0.69 mS/cm and 19.8 to 13.3, respectively, demonstrating the potential of such a system towards single-step water treatment of brackish and wastewaters for direct use in irrigation.

Application of three different water treatment technologies to shale gas produced water

2016 ◽  
Vol 20 (2) ◽  
pp. 104-110 ◽  
Author(s):  
Eunyoung Jang ◽  
Seongpil Jeong ◽  
Eunhyea Chung
Keyword(s):  
Water Treatment ◽  
Shale Gas ◽  
Produced Water ◽  
Treatment Technologies

NATURE-BASED SOLUTIONS FOR CLIMATE RESILIENT BUILDINGS AND CITIES

2020 ◽  
Author(s):  
Barbara Widera
Keyword(s):  
Urban Design ◽  
Well Being ◽  
Sustainable Growth ◽  
Environmental Benefits ◽  
Raw Material ◽  
End User ◽  
Material Consumption ◽  
Local Conditions ◽  
Sustainable Urbanization ◽  
And Performance

The paper addresses the topic of nature-based solutions applied in the architectural and urban design. These ideas are analyzed in the context of the opportunities they create for the humanity in terms of the sustainable growth and environmental protection. Nature-based solutions are inherently taken from nature. The first part of the paper presents their tremendous potential to be energy and resource-efficient, and resilient to change. In the second part of the research particular concepts driven from nature (copied form nature or inspired by nature) proposed for the buildings and cities are described and evaluated. The author discusses their functional usefulness, spatial appropriateness, adaptation to local conditions, end-user comfort, environmental benefits and the possibility of duplication. Nature-based solutions applied in urban planning can make cities more climate resilient and contribute to ecosystems restoration. The paper describes how sustainable urbanization can stimulate economic growth, make cities more attractive and enhance well-being of the inhabitants. It is also explained how particular buildings can benefit from the concepts driven from nature e.g. by increasing their energy efficiency and performance in terms of raw material consumption. In purpose to properly response to the climate challenge, humanity has to establish a new kind of partnership with nature. Using nature-based solutions should be considered as an important part of this approach. The concepts presented in this paper show some of the most promising options, such as integration of living systems with built systems and innovative combinations of soft and hard engineering. In conclusion some of the most promising nature-based solutions for climate resilient buildings and cities are indicated

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