drinking water nitrate Articles
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Poly (Ε-caprolactone) as substrate for water denitrification
In this paper, poly (Ε-caprolactone) (PCL) was used as carbon source and biofilm supporter in a fixed bed bioreactor to biologically remove nitrate from drinking water. The experimental results showed that denitrifying microorganisms could easily adapt to PCL as carbon source and attach to the surface of PCL granules. The fine biofilm could form on the surface of PCL granules within 15 days. ...
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Ionex- Versatile ion exchange technology for Nitrate removal
Belgian separations technology company PuriTech (www.puritech.be) has designed an ion exchange system that improves liquid–resin contact efficiency while reducing plant operating costs and capital expenditure. Targeted at a broad range of industries, one area where the system is now showing its strength is in the removal of nitrates from drinking water, asPuriTech's Filip Rochette explains. ...
By PuriTech Ltd
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Study Quantifies Drinking Water Nitrate’s Role in U.S. Cancer Cases
Negative health outcomes from nitrate in drinking water hit farming communities particularly hard A new Environmental Working Group (EWG) study, published inEnvironmental Research, has estimated that nitrate contamination of drinking water will cause thousands of cancer cases annually in the United States. The cancers are also expected to run up $1.5 billion in medical bills each year, with ...
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The risk of cancer as a result of elevated levels of nitrate in drinking water and vegetables in Central India
The objective of the present study was to determine the effect of nitrates on the incidence of gastrointestinal (GI) cancer development. Nitrate converted to nitrite under reducing conditions of gut results in the formation of N-nitrosamines which are linked to an increased gastric cancer risk. A population of 234 individuals with 78 cases of GI cancer and 156 controls residing at urban and ...
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How can you remove nitrates from your well water?
Well contamination is increasing across the US Across the United States, more drinking water wells in agricultural areas are being contaminated with nutrients leaving farms and other agricultural operations. One of these common nutrients is nitrate or NO3. Nitrate is a primary drinking water standard. The maximum nitrate (MCL) allowed in drinking water is 10 mg/L of nitrate as nitrogen or NO3-N. ...
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Nitrate Removal by Countercurrent Ion Exchange
Nitrate removal technology by continuous countercurrent ion exchange from potable water. High flow capacity, low waste generation. This ICHEM award winning technology is the industry standard used in the United Kingdom. More than 20 installations installed. PuriTech's patented multi-port valve is at the center of each production skid. At average, each unit produces a maximum waste of 0,5% of the ...
By PuriTech Ltd
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Nitrate Monitoring Simplifies Drinking Water Management
Nitrate in source water can be challenging to manage and lead to potential non-compliance issues. Continuous monitoring of nitrate enables you to keep a real-time pulse on nitrate concentrations from source water to finished water, offering many benefits: Compliance with drinking water standards for nitrate Optimized blending ratios to maximize water use Efficient nitrate treatment with ion ...
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Groundwater Nitrate Monitoring Applications
Nitrate in source water can be challenging to manage and lead to potential non-compliance issues. Continuous monitoring of nitrate enables you to keep a real-time pulse on nitrate concentrations from source water to finished water, offering many benefits: Compliance with drinking water standards for nitrate Optimized blending ratios to maximize water use Efficient nitrate treatment with ion ...
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Case Study: WTP Optimizes Well Blending with Online Nitrate Analyzer
The Village of Port Williams is a thriving agricultural community in Nova Scotia, Canada. Like many agricultural communities, long-term fertilizer application to the land has led to elevated levels of nitrate in groundwater. Nevertheless, the local water supply plant continuously produces high quality drinking water. With a reliable nitrate monitoring system from Real Tech and a solid management ...
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Effects of sulfate and nitrate on the taste of water: a study with a trained panel
The role of sulfate and nitrate in the taste of drinking water is not entirely clear. Taste threshold concentrations (TTCs) were estimated for these two species by the 3-AFC method by a trained panel, as sodium and calcium salts. In both cases TTCs for nitrate were about 100 mg NO3/L, twice the usual reference value of international recommendations. TTCs for sulfate were about 160 mg SO4/L ...
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Community-based wastewater treatment systems and water quality of an Indonesian village
This paper examines the impact of community-based water treatment systems on water quality in a peri-urban village in Yogyakarta, Indonesia. Water samples were taken from the wastewater treatment plants (WWTPs), irrigation canals, paddy fields and wells during the dry and wet seasons. The samples were tested for biological and chemical oxygen demand, nutrients (ammonia, nitrate, total nitrogen ...
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Nitrate Pollution Affects Millions in U.S.
According to new study, the water contamination disproportionately affects poor and Hispanic Americans Runoff of agricultural fertilizer is a major source of nitrate pollution in drinking water. A new study in the journal Environmental Justice has determined that 5.6 million Americans served by community water systems (CWSs) in the United States are exposed to excessive nitrate levels in ...
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Utilisation of drinking water from rainwater–harvesting cisterns in the Palestinian territories: assessment of contamination risk
A set of established precautions and procedures must be followed to ensure water quality in rainwater harvesting cisterns. In this study, 106 cisterns were sampled and 176 cistern owners were surveyed in the northern West Bank region. It was found that although the nitrate concentration and Total Dissolved Solids (TDSs) readings of the sampled cisterns conformed to Palestinian standards, most ...
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Hydrogenotrophic denitrification of drinking water using a hollow fibre membrane bioreactor
ABSTRACTThe objective of this research was to investigate the performance of a hollow fibre membrane bioreactor (HFMB) for hydrogenotrophic denitrification of contaminated drinking water. In the HFMB, H2 flows through the lumen of the hydrophobic hollow fibres and diffuses to an attached H2 oxidizing biofilm. Nitrate in the contaminated water serves as an electron acceptor. A hydrogenotrophic ...
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Nitrate Pollution of Groundwater
What are some of the environmental and health issues surrounding nitrate in groundwater, and options to resolve them? Nitrogen is a naturally occurring element that is essential for life on Earth. It makes up 78% of the air we breathe and is essential for plant and animal growth. However, when too much nitrogen is present in fresh water, it can cause environmental problems and contaminate ...
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Nitrate removal using different carbon substrates in a laboratory model
Agricultural fields have been frequently identified as major contributors of nitrate leaching into surface and ground waters. Tile drains can act as direct pathways, transferring leached nitrate to surface water. Bioreactor filters are useful for the removal of nitrate from drainage waters; however, these filters require an external carbon supply to sustain denitrification. In this study, four ...
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Testing for Nitrates in Water, what are the Options?
Nitrate is a naturally occurring substance in the environment and is commonly found in most water sources, it is usually only a cause for concern in areas where water supplies can be affected by farm runs offs and agriculture, its use as a fertiliser can cause increased levels in water supplies The UK safe limit for nitrates in Drinking water is 50mg/l as described in the current advice on ...
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High frequency monitoring needed to protect UK rivers - Case Study
The science behind nutrient pollution in rivers is still poorly understood despite the fact that nitrate and phosphate concentrations in the UK’s rivers are mostly unacceptable, although an element of uncertainty exists about what an acceptable level actually is. Key to improving our understanding of the sources and impacts of nutrient pollution is high-resolution monitoring across a broad ...
By OTT HydroMet
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What are the 8 water quality testing parameters?
Water is an essential resource, and its quality is vital to ensure the well-being of individuals and the environment. Therefore, water quality testing is a crucial process that needs to be conducted periodically to assess the suitability of water for various purposes. In this blog post, we will discuss the eight parameters that are commonly tested to determine water quality. 1. pH Level The pH ...
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Public health perspectives of channelized and unchannelized headwater streams in central Ohio: a case study
Headwater streams constitute the majority of watersheds in the United States and many in the midwest have been channelized for agricultural drainage. Public health implications of water chemistry and aquatic insects within channelized and unchannelized headwater streams have not been explored. We sampled water chemistry and aquatic insects in two channelized and two unchannelized headwater ...
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