granular activated carbon filtration Articles
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Ozonation and Granular Activated Carbon Filtration the Solution to Many Problems
This paper explains how ozone is used in the purification of surface water to potable water both as the first treatment stage and as an intermediary stage for the reduction of organics and as a disinfectant. Taste and odour of the water are improved by the oxidation of both organic and inorganic impurities by ozone. Products resulting from algae metabolisms are shown to be easily oxidised by ...
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Application of combined filtration and coagulation for semi-aerobic leachate treatment
The landfill leachate was taken from the Pulau Burung Landfill Site (PBLS), Malaysia. Filtration by limestone-zeolite (15 : 25) and limestone-GAC (15 : 25) with filtration rate = 0.01 m3/m2.minute showed that 70% and 85% of colour and 42% and 70% COD were removed, respectively. Maximum colour removal (93% and 92%) and COD removal (56% and 46%) were achieved by the addition of 2000 mg/L PAC and ...
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Separated adsorption and bacterial degradation of microcystins in GAC filtration
For removal of microcystins from drinking water, Granular Activated Carbon (GAC) filtration has shown to be promising as it is not only an efficient adsorbent, but also can support biodegradation of microcystins, extending the lifetime of this application. In this study, a sterile and non-sterile GAC column, in addition to a sand column, was studied to distinguish the adsorption and ...
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Utilities water in the desert - Mauritania, 40 m3/d - Case Study
Project Description: Lenntech has engineered, manufactured and assembled a containerized brackish water reverse osmosis system on an industrial site in the Sahara desert in the Islamic Republic of Mauritania. The treated and desalinated water is used as utilities water for the industrial site. The water desalination system is equipped with top brand instrumentation and equipment. The system is ...
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MBR Based treatment of tractor manufacturing wastewater
Abstract Kubota corporation has recently built new tractor manufacturing plant in Jefferson Georgia. CWT and Kubota agreed to design, pilot test and build a system for full water reuse of up to 75% of produced wastewater. Wastewater is very complex and contains complexed heavy metals, fine suspended solids, emulsified oils, grease, strong degreasing agents, nutrients (nitrogen and phosphorous) ...
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Perfluorinated chemicals (PFCs) in water purification plants (WPPs) with advanced treatment processes
A series of perfluorinated chemicals (PFCs) surveys were conducted in two water purification plants (WPPs) having ozonation and granular activated carbon (GAC) filtration processes. In each plant, six different processes samples (source water, influent, coagulation-sedimentation effluent, ozonation effluent, GAC filtration effluent, and final tap water) were collected for two times and eight PFCs ...
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Namibia increases reliance on recycled wastewater as water scarcity grows
Namibia, an arid country in southern Africa, is plagued by drought and water scarcity. But, it’s also a country that continues to make progress in wastewater recycling after becoming an early adopter of the technology. The city of Windhoek’s Goreangab wastewater treatment plant is considered a pioneering facility in water reclamation. First constructed in 1968, the plant not only ...
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What is Activated Carbon Filtration?
The process may have ancient roots, but still plays a role in modern water treatment Activated carbon filtration is one of many processes commonly used in water treatment to remove contaminants such as organic materials, and since it also can remove odor-causing contaminants, it’s often used to make drinking water more palatable. The first known carbon filtration devices date back to ...
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UV/H2O2 treatment: an essential process in a multi barrier approach against trace chemical contaminants
The presence of pesticides, endocrine disruptors and pharmaceuticals caused PWN to implement multiple barriers for organic contaminant control in their surface water treatment plants. A combination of advanced oxidation by UV/H2O2 treatment and granular activated carbon (GAC) filtration is installed. Medium pressure UV experiments in a standard pilot reactor have been carried out into the ...
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Industrial facility with chlorinated solvents
Project Description The project site is an Industrial facility located in the foothills of northern Los Angeles, California. The facility utilized chlorinated solvents in operations. Site Geology Based on soil borings site geology consisted of unconsolidated gravely sands, sand, silty sand, sandy silt, and silt from ground surface to more than 200 feet below ground surface (bgs). Groundwater was ...
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Water Utilities - Potable Water Treatment - Case Study
Project Title - Hall Water Treatment Works Client - GTM JV / Anglian Water Project Value - £350K Chemical - Hydrogen Peroxide 50% Duration - 18 months Our Services Design, build and site install a hydrogen peroxide dosing system c/w with control system. Details Anglian Water commissioned a new water treatment plant, opened in 2014, treating up to 20 million litres per day. The ...
By WES Limited
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“Ozone” and “GAC filtration” synergy for removal of emerging micropollutants in a drinking water treatment plant?
Ozonation plays an essential role in water disinfection to inactivate viruses, bacteria and some parasites (Giardia). Ozone treatment rates to attain disinfection goals also result in oxidation reactions of emerging pollutants. Pharmaceuticals–except Ciprofloxacin–are very reactive to ozone: they are removed as early as the transfer compartment outlet even at an ozone treatment rate ...
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Bottled water company - Algeria, 300 m3/d - Case Study
Project Description: Lenntech has been awarded a contract for the engineering, manufacturing and assembly of a turnkey decarbonisation system in a bottled water factory in the Algeria. The treated water is used for the preparation of bottled water for local population. The water treatment system is equipped with top brand instrumentation and equipment. The system is completely from European ...
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Pilot scale experiments on surface water treatment sequence including ozonation and adsorption processes
The paper presents results of the experimental studies on combined ozonation and activated carbon adsorption processes at the Water Treatment Plant (WTP) at Cracow (Poland). The study focused on the selection of an appropriate location of an ozonation process within the treatment scheme and on the choice of activated carbon grade for adsorption. Analysis of process efficiency in the proposed ...
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Soft drink water supply - United Kingdom, 2.100 m3/d - Case Study
Project Description: Lenntech has engineered, manufactured and assembled a turn-key water treatment system, comprising of screen filters, ultra filtration and reverse osmosis in the United Kingdom. The demineralised water is used for the preparation of soft drinks. The water demineralisation system is equipped with top brand instrumentation and equipment. The system is completely from European ...
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Case Study: Water Authority ensures DBP Compliance with UV254
Mohawk Valley Water Authority (MVWA) in New York State is a progressive supplier of potable water. With source water from the Adirondack Mountains, MVWA works to improve on nature and provide superior water quality, always striving to meet or exceed drinking water standards. Background Like many other surface water sources, MVWA’s water supply is rich with natural organic matter (NOM). ...
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Quantitative microbial risk assessment of drinking water treated with advanced water treatment process
Campylobacter jejuni is one of the major causes of waterborne disease in Japan. A quantitative microbial risk assessment (QMRA) was conducted to evaluate the health risk caused by this pathogen in drinking water treated with a supposed advanced treatment process including ozonation and granular activated carbon adsorption. Coagulation-sedimentation, rapid sand filtration, ozonation, and ...
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Rich microbial communities inhabit water treatment biofilters and are differentially affected by filter type and sampling depth
Factors affecting microbial diversity (richness) and community structure in biofilter columns were investigated. At a pilot filtration plant, granular activated carbon (GAC), anthracite and sand-based filters were used to treat stormwater from an urban catchment. After 12 weeks operation, sand media filters clogged (hydraulic conductivity declining by 90%) and all filters were destructively ...
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The evolution of organic character in a drought- and flood-impacted water source and the relationship with drinking water treatment
A pilot-scale research investigation examining treatment technologies including coagulation, ion-exchange, activated carbon and membrane filtration and their impact on water quality coincided with a period of extensive variability in source water character. Distinct water quality periods as a result of extreme climatic conditions from drought to flood were observed and the natural organic ...
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Household rainwater harvesting system – pilot scale gravity driven membrane-based filtration system
This paper presents the results of a pilot scale study consisting of pre-treatment with a granular activated carbon (GAC) filter followed by membrane filtration. Detailed characterisation of rainwater tanks has highlighted that turbidity, dissolved organic carbon (DOC) and heavy metals, in particular lead, were not compliant with the 2004 Australian Drinking Water Guidelines (ADWG). Further, ...
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