surface water Articles
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Assessing the metabolic potential of phototrophic communities in surface water environments: Fludioxonil as a model compound
Differences are often apparent in the observed rates of degradation between laboratory water‐sediment studies and outdoor studies in surface water environments. Indeed, previous work has shown that including phototrophic communities in laboratory systems can result in the enhancement of degradation, when compared against systems that exclude phototrophs, incubated in darkness. In ...
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Development of a regression model to predict copper toxicity to Daphnia magna and site‐specific copper criteria across multiple surface‐water drainages in an arid landscape
The water effect ratio (WER) procedure developed by the U.S. Environmental Protection Agency is commonly used to derive site‐specific criteria (SSC) for point‐source metal discharges into perennial waters. However, experience is limited with this method in ephemeral and intermittent systems typical of arid climates. This study presents a regression model to develop WER‐based SSC for a network ...
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Home water treatment by direct filtration with natural coagulant
ABSTRACTSeeds of the plant species Strychnos potatorum and Moringa oleifera contain natural polyelectrolytes which can be used as coagulants to clarify turbid waters. In laboratory tests, direct filtration of a turbid surface water (turbidity 15-25 NTU, heterotrophic bacteria 280-500 cfu ml−1, and fecal coliforms 280-500 MPN 100 ml−1), with seeds of S. potatorum or M. oleifera as ...
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Research paper: Algae control with ultrasound in a WTP
Algal blooms are a form of pollution that can harm water quality and increase operating costs at treatment plants due to the presence of toxic algae. These toxins are complex, odorless, and resistant to sterilization. To meet legal requirements and optimize costs, it is essential to control algal growth in treatment plants using surface water for drinking. One solution for controlling algae is ...
By LG Sonic
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City of Houston Total Organic Carbon - Case Study
ABSTRACT The City of Houston, Texas has been aware of the implications that current and pending regulatory standards would have on the operation of their four surface water treatment facilities. In particular, the City has closely monitored changes in regulations related to enhanced coagulation, total organic carbon (TOC) removal, and disinfection by-products (DBP) reduction. The City has, and ...
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3D model evolution of a leak based on GPR image interpretation
This paper presents some aspects of the time propagation of underground water leakage in controlled laboratory conditions using a drilled polyvinyl chloride (PVC) pipe and interpreting ground penetrating radar (GPR) images. GPR pre-processed images are interpreted for easy identification and extraction of surfaces and volumes of water leakage. Finally, the temporal evolution of a water leak ...
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Application of water pollution detector
Background: The (nitrate) link between agriculture and water quality is nutrient abundance - I've always thought the main issue was with fertilizers. Excessive nutrient loss often leads to eutrophication of surface waters. This condition can lead to harmful algal blooms (HAB), which produce dangerous toxins and cause a drop in dissolved oxygen, killing fish in both marine and freshwater ...
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Matrix express makes Water testing lab more efficient case study
Matrix Express LIMS allowed The Water Lab to improve its efficiency and provide a faster service by streamlining the processing and management of sample information. The Water Lab (www.lhewaterlab.ie/) is a modern, fully calibrated ISO17025 environmental contract laboratory based in Co. Kildare, Ireland. Providing a wide range of water and waste water testing services, including sampling and ...
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Application of water pollution detector
Background:The (nitrate) link between agriculture and water quality is nutrient abundance - I've always thought the main issue was with fertilizers. Excessive nutrient loss often leads to eutrophication of surface waters. This condition can lead to harmful algal blooms (HAB), which produce dangerous toxins and cause a drop in dissolved oxygen, killing fish in both marine and freshwater ...
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Key issues of ultrafiltration membrane water treatment plant scale-up from laboratory and pilot plant results
Industrial-scale ultrafiltration (UF) membrane systems have gained wide acceptance for producing safe drinking water. Laboratory and pilot plant studies are often carried out prior to the design of full-scale water treatment plants. Emphases are laid on how accurately these laboratory and pilot plant studies represent actual industrial-scale systems and the limitations. A case study which ...
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Sunlight-Blocking Covers Control Algae, Reduce Operational Costs at California Utility
The Utility: The Santa Clara Valley Water District (the District) manages an integrated water resources system that includes the supply of clean, safe water, flood protection, and stewardship of streams on behalf of Santa Clara County's 1.8 million residents. The district effectively manages 10 dams and surface water reservoirs, three water treatment plants, an advanced recycled water ...
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In situ Chemical Oxidation: An Innovative Groundwater Remediation Technology
A promising new technology, in situ Chemical Oxidation (ISCO), has the potential to supplant the more widely used pump-and-treat groundwater remediation technology by destroying groundwater contamination in situ (in place). ISCO is the process of oxidizing contaminants in the groundwater and soil by injecting water containing high concentrations of an oxidant to the site of the contamination. ...
By AECOM
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Where Tomorrow Gets its Water
Embracing, not avoiding, the challenges of the environment, MECO engineers the world’s most innovative, sustainable and trusted water purification solutions. The world depends on people who depend on MECO. Our customers are shaping the future, and they require a sure source of pure water, in biotech labs and high output drug manufacturing facilities, in offshore oil exploration and ...
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How To Clean A Fume Hood: Discover The Best Materials For Each Surface
Working in a laboratory usually involves hazardous chemicals and materials. Like any equipment, fume hoods need regular cleaning to keep them in good condition. It’s important to maintain your fume hood because it exhausts harmful toxins out of the lab. A malfunctioning hood could create a serious hazard. The best cleaning products for each surface First, make sure that the cleaning agents ...
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Tecta B16 Success Story - Kuwait Ministry of Health - Case Study
Established in 1956 the Public Health Laboratories of Kuwait are responsible for protecting the health of consumers and ensuring fair practices in the international food trade. All export and import foods are inspected for their fitness and conformation in these laboratories. All inspections build on an international authorized organization called Codex Alimentarius Commission. The Public Health ...
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Tecta B16 Success Story - University of Arizona Water Quality Center - Case Study
The Water Quality Center (WQC) Lab is located in the Fleischmann Building of the Environmental Research Laboratory, an off-campus University of Arizona facility. The Lab focuses on water quality and is equipped to perform state-of-the-art chemical and biological analyses. Biological analyses include bacterial and viral pathogens and indicator organisms. The Lab also performs tests on other ...
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Bacterial biofilms formed in arsenic-containing water: biodeterioration of water network materials
The immersion of any material in a water system triggers a surface microbial colonization which simultaneously influences the corrosion behavior of the substratum. The present study was focused on the As(V) influence on the biofilm formation and their consequences on the corrosion behavior of different substrata. Commercial materials used in water distribution networks: alloys based on Fe, Zn ...
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Molybdenum(VI) removal by using constructed wetlands with different filter media and plants
The efficacy and capacity of vertical-flow wetland filters on molybdenum (Mo) removal from wastewater was examined, employing reed (Phragmites australis) and cattail (Typha latifolia) as well as different adsorption granular media. Humus, cinder, modified cinder, as well as pyrite were used as filter media. A synthetic effluent with different concentrations of Mo(VI) at different hydraulic ...
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