bioassay Articles
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An assessment of the checkpoint bioassay concept for full scale wastewater UV reactor validation
In an effort to help policy makers and manufacturers understand the impact of parameter uncertainties on UV reactor performance, a numerical bioassay model was developed by integrating a UV reactor model based on computational fluid dynamics with a Monte Carlo model developed to account for parameter uncertainty. For the model implemented, it was determined that reactor performance uncertainty ...
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Development of a recombinant Arxula adeninivorans cell bioassay for the detection of molecules with progesterone activity in wastewater
Abstract This study describes the development of a bioassay to detect the presence of progesterone and progesterone-like molecules in wastewater samples. The basis of the bioassay is the integration of the human progesterone receptor gene into the yeast Arxula adeninivorans for the constitutive synthesis of the receptor. After incubation, binding of the analyte to the receptor induces the ...
By QuoData GmbH
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The Perspective of Microbiotests Application of Surface Water Monitoring and Effluent Control in Estonia
Abstract: In Estonia, traditional chemical monitoring of surface water and effluents is performed but bioassays are not used as monitoring tools. Furthermore, the expediency of application of toxicity tests to surface water monitoring is questionable. The main aim of this study was to test the feasibility of using microbiotests in the biomonitoring of surface waters and effluents. The ...
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Effect of interspecies quorum sensing on the formation of aerobic granular sludge
Quorum sensing (QS) is a form of microbial communication that relies on small signal molecules to regulate group behaviors such as biofilm formation in response to population density. In this study, we attempted to apply the paradigm of bacterial QS to aerobic granular sludge (AGS) formation for wastewater treatment. An essential element of interspecies QS signals, boron, was added to a sequencing ...
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Interpreting UV validation results: impact of key design parameters on performance of closed vessel reactors
The Long Term 2 Enhanced Surface Water Treatment Rule (LT2ESWTR) dictates that for a DWTP to receive credit for UV inactivation of chlorine resistant pathogens such as Cryptosporidium and Giardia , validation testing must be performed to demonstrate that the UV reactor equipment delivers the required dose. This paper summarizes an extensive bioassay validation program undertaken at the DVGW ...
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Biodosimetry of a full-scale uv disinfection system to achieve regulatory approval for wastewater reuse
In order to respond to the stringent disinfection requirements for reclaimed wastewater in the United States, Ozonia North America (ONA) undertook a bioassay validation study of a lowpressure nvery high-output (LPVHO) ultraviolet (UV) disinfection system. The disinfection performance of this process technology was verified via biodosimetry in accordance with the Ultraviolet Disinfection ...
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Steroid oestrogens in the environment: an Australian perspective
Endocrine disrupting compounds (EDCs) have been in the scientific spotlight since the 1980s. However, there has been much less research reported in Australia than in other developed countries and little information is known about how these compounds interact with native Australian species compared to European and North American fauna. This is of concern because Australia has distinct wildlife ...
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Assessment of hormonal activities and genotoxicity of industrial effluents using in vitro bioassays combined with chemical analysis
Wastewaters from various industries are a main source of the contaminants in aquatic environments. The authors evaluated the hormonal activities (estrogenic/anti‐estrogenic activities, androgenic/anti‐androgenic activities) and genotoxicity of various effluents from textile and dyeing plants, electronic and electroplate factories, pulp and paper mills, fine chemical factories, and municipal ...
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Closed vessel or open channel UV disinfection systems
Ultra violet disinfection is now a standard feature in most waste water disinfection systems. UV has also been adopted by the drinking water community, as a barrier against the chlorine tolerant species such as Cryptosporidium and Giardia. The technology is widely favored due to its non- chemical nature, the fact that no subsequent de-chlorination process is required, and its ability to be ...
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A tiered, integrated biological and chemical monitoring framework for contaminants of emerging concern (CECs) in aquatic ecosystems
The chemical‐specific risk‐based paradigm that informs monitoring and assessment of environmental contaminants does not apply well to the many thousands of new chemicals that are being introduced into ambient receiving waters. We propose a tiered framework that incorporates bioanalytical screening tools and diagnostic non‐targeted chemical analysis to more effectively monitor for contaminants ...
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Evaluation of acute ecotoxicity removal from industrial wastewater using a battery of rapid bioassays
The present study compares conventional wastewater treatment technologies (coagulation–flocculation and activated sludge) and powdered activated carbon (PAC) treatment for the removal of acute ecotoxicity from wastewater generated by tank truck cleaning (TTC) processes. Ecotoxicity was assessed with a battery of four commercially available rapid biological toxicity testing systems, ...
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Emergent contaminants in the wastewater effluents of two highly populated tropical cities
Exposure to the anthropogenic chemicals known as endocrine disrupting compounds (EDCs) may result in negative biological effects. Low levels of EDCs in the environment aggravate the problem as exposure is constant. Urban areas concentrate pollution as greater volumes are released from human activities. Water for public supply is particularly vulnerable as the sewage treatment facilities may ...
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Closed-vessel vs. open channel - Case Study
Ultraviolet disinfection is now a standard feature in most waste water treatment systems and has also been adopted by the drinking water community. UV Systems Are Fast Becoming the Treatment of Choice Ultraviolet disinfection is now a standard feature in most wastewater treatment systems. UV has also been adopted by the drinking water community, as a barrier against the ...
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Integrated assessment of wastewater treatment plant effluent estrogenicity in the Upper Murray River, Australia, using the native Murray rainbowfish (Melanotaenia fluviatilis)
The contamination of major continental‐river systems by endocrine‐active chemicals (EACs) derived from the discharge of wastewater treatment plant (WWTP) effluents can impact human and ecosystem health. As part of a long‐term effort to develop a native fish model organism for assessment of endocrine disruption in Australia's largest watershed, the Murray‐Darling River Basin, the present study ...
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Neptune project deliverable D3.2
Data set of ecotoxicity testing in relevant treatment processes and additionally of two emerging contaminants Micropollutants – trace organic contaminants occurring at ng/L concentrations or even below – attract more and more attention because of their potential impact on aquatic ecosystems. Thousands of different chemicals are introduced in the aquatic environment on trace levels ...
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What shall we tell the UV supplier? - Case Study
Let’s look at the key information needed by your UV supplier in order to ensure you get the right UV system to meet your business' needs. Firstly, Why Choose UV Irradiation Technology? Diane White of atg UV Technology talks to Food Processing magazine and gives top tips on specifying UV systems Ultraviolet irradiation is the technology of choice for liquid disinfection ...
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UV Minimises Risks for Major Food Retailers
For many years, one of the UK’s largest food manufacturers has made it their business to be the best at producing all manner of bespoke cooked and raw, ready-to-eat vegetables and carbohydrates for their customers, who include chilled food manufacturers, food-to-go operators and, of course, major supermarkets. Being the best means not only complying with food quality standards set by ...
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The challenge: Tackling the problem of microorganisms and pesticides - Case Study
As published in this months WET News....Conventional treatment are effective at removing Cryptosporidium, but there are inherent weaknesses in the technologies. atg’s Barry Hopton reveals all. The Challenge “The disinfection of public water supplies is a statutory requirement in England and Wales. Water supplied for domestic or food production purposes must not contain any ...
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