water collection Articles
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Project - Spinola park facade embellishment
Scope of work - to produce a series of self-supporting planters and custom-designed water collection systems, integrated in the building facade. Execution - once the detailed design of the different products was finalised, planters were pre-assembled off site whilst a 77metre long gutter was built directly on ...
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Treatment and reuse of wastewater in pesticide 2,4-D production
Waste-water from the production of pesticide 2,4-D often contains high concentrations of 2,4-DCP and 2,6-D as the primary pollutants. Treatment of waste-water collected from a 2,4-D manufacturer was carried out using a technology combining acidification with hyper-crosslinked resin NDA-150 adsorption process. The overall process recovered 5.4 kg of 2,4-DCP and 0.6 kg of 2,6-D per cubic metre of ...
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Household water constraints and agricultural labour productivity in Tanzania
While previous research has analysed the links between drinking water access and health, and to some extent between health and agriculture, the direct impact of household water access on agricultural productivity has hardly been studied. We address this research gap, using survey data from Tanzania. Regression models show that water access constraints significantly decrease labour productivity ...
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Historical development of rainwater harvesting and use in Hellas: a preliminary review
The uneven temporal and partial distribution of water resources in Hellas, and especially southeastern regions, has resulted in the construction of various water systems for collection and storage of rainwater, since their very early habitation. Ever since, technologies for the construction and use of several types of cisterns and other relevant hydraulic strictures have been developed. The ...
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Considerations for the design of bottom intake systems
Knowing the scarcity of water in the southeast of Spain and how the rain occurs, we considered the design of intake systems in ephemeral riverbeds in order to try to capture part of the runoff flow. The intake systems generally consist of a rack located in the bottom of a river channel, so that the water collected passes down the rack and leads to the side channel. This behaviour has been ...
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The karez of the Sauran region of Central Asia
A large number of lines of water collection wells were identified by aerial surveys in the arid region near the ancient city of Sauran on the Middle Syr Darya (South Kazakhstan, Central Asia). They are locally called karez, which in Persian means ‘water uplift’. Initially these were assumed to be qanat, a water collection and distribution system that is widespread in the Middle East, North Africa ...
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How do those plants do that?
It will come as no surprise to Ensia readers that nature has a lot of answers we could use to solve our most dire problems related to the environment. We’ve touched on the topic a number of times, from short notables to op-eds to feature stories. But figuring out how exactly nature pulls off its tricks isn’t always an easy job, much less translating that into human technology to make ...
By Ensia
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Water security and sustainability in urban India
The rapid growth of population combined with rising levels of consumption and pollution has increased water insecurity in urban India. The depleting water sources on the one hand, higher financial and technological costs to refine and transport water from far off sources on the other, leave limited possibilities to augment the water supply in the near future. Climate change may further adversely ...
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Socio-psychological determinants for safe drinking water consumption behaviors: a multi-country review
The effectiveness of household water treatment practices relies heavily on consumers' compliance. However, what is driving these behaviors from a health psychological perspective is not well understood. A review of studies on safe water collection, treatment, handling and storage practices was conducted to identify important socio-psychological determinants. The objectives are to show which ...
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Grey water recycling
AZUD Watertech offers the prefabricated compact plant AZUD WATERTECH GW for the grey water treatment, without unpleasant odours or noise. The grey water is collected from showers, bathtubs and sinks and the treated water can be reused in toilets and landscape ...
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Comparison of the Conventional Algal Assay and the Algaltoxkit FTM Microbiotest for Toxicity Evaluation of Sediment Pore Waters
Abstract : Conventional algal tests have not been utilized to their full potential for routine toxicity assessments. This is mainly due to the complexicity of these assays and the fact that many operators are still encountering practical difficulties. In view of the need for a cost-effective alternative to standard algal assays for routine testing, a new culture/maintanance free algal test was ...
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Research on CFD numerical simulation and flow field characteristics of countercurrent–cocurrent dissolved air flotation
Countercurrent–cocurrent dissolved air flotation (CCDAF), the popular water purification device, which consists of collision and adhesion contact zones, showed favorable flotation conditions for micro-bubble adhesion and stability. In this study, computational fluid dynamics (CFD) numerical simulation was employed to confirm that the unique CCDAF configuration create reasonable and that the ...
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Modeling metal bioaccumulation and tissue distribution in killifish (Fundulus heteroclitus) in three contaminated estuaries
The present study experimentally assessed the uptake, loss, and resulting tissue distribution of As(V), Cd, Cr(III), Hg(II), and methylmercury (MeHg) in killifish (Fundulus heteroclitus) following aqueous exposure in water collected from 3 contaminated field sites—Baltimore Harbor and Elizabeth River (Chesapeake Bay), and Mare Island (San Francisco Bay)—using a radiotracer technique. Uptake ...
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Bacterial growth and biofilm formation in household-stored groundwater collected from public wells
The research was aimed at assessing changes in the number of bacteria and evaluating biofilm formation in groundwater collected from public wells, both aspects directly related to the methods of household storage. In the research, water collected from Cretaceous aquifer wells in Toruń (Poland) was stored in a refrigerator and at room temperature. Microbiological parameters of the water ...
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Two proposals for unlimited fresh water
The world water crisis may be more serious than generally appreciated. One reason for this is that the main response has been to increase storage of rain rather than to increase the amount of fresh water. Another is that fossil groundwater has been widely seen as inexhaustible. Two fresh water collecting systems are outlined here and it is argued that they have no ultimate limitation, either by ...
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The properties of Seljuq and Ottoman era public fountain faucets and some rare faucet samples
Until the late 19th and early 20th century, public fountains (in Turkish, ‘çeşme’) in Anatolia and Ottoman lands had an important place in everyday life. The water that was collected from various water sources and brought to the city centres through waterlines was supplied to people from the architectural stone structures which we call ‘fountains’. ...
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Potable water scarcity: options and issues in the coastal areas of Bangladesh
In the coastal areas of Bangladesh, scarcity of drinking water is acute as freshwater aquifers are not available at suitable depths and surface water is highly saline. Households are mainly dependent on rainwater harvesting, pond sand filters and pond water for drinking purposes. Thus, individuals in these areas often suffer from waterborne diseases. In this paper, water consumption behaviour ...
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Water demand: the Austrian end-use study and conclusions for the future
Demographic and climate change will affect in the long term the total water consumption and therefore the planning and management of the related infrastructures. End-use studies provide information on water consumption and its influencing factors. However the availability of such detailed data is very limited. The research project carried out was based on total daily water consumption collected ...
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Flocculation kinetics mechanism and floc formation prepared by poly aluminum chloride coupled with polyacrylamide for ship ballast water
The performance of flocculants prepared by poly aluminum chloride (PAC) and polyacrylamide (PAM) on treating ballast water collected at the Dalian new port area, the evaluation depending on the values of reaction parameters, and kinetics mechanism of flocculation were investigated in this study. Accordingly, the flocculants of 0.1 g·L−1, prepared by mixing PAC of 10% with PAM of 2.0‰, enabled ...
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Water Reuse Model Research - Case Study
Overview A University of Nevada Las Vegas research team wanted to create an accurate model for best practices in water reuse. David James, Ph.D., and his research students performed water flow research at Lake Arrowhead in California. This lake is 782 acres in size, 185 ft deep, and has an elevation of 5,174 ft. The research team used tracers and water probes to collect water flow data. ...
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