Granular Activated Carbon (GAC) Filtration Articles
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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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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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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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Cooling Tower Blow Down Re-Use - Switzerland, 300 m3/day - Case Study
Project Description: Lenntech has engineered, installed and commissioned a turnkey pilot system pertaining MMF, followed by UF, GAC and IX softening, as a last step the water is demineralized with use of a high recovery CCRO system (93%) for cooling tower make-up water in Switzerland. The treated water is used as make-up water for the cooling tower in order to maintain conductivity < 850 ...
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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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Wichita ASR Project, KS – Bromate Control Case Study
The City of Wichita’s Aquifer Storage Recovery (ASR) Project involves seasonal operation of a UF/disinfection plant to treat storm water from the Little Arkansas River for groundwater recharge. Constituents of concern included atrazine, viruses, turbidity, total organic carbon (TOC), and bromate. Each of these constituents had a potential significant impact on possible treatment processes. ...
By APTwater LLC
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Micropollutant removal from black water and grey water sludge in a UASB-GAC reactor
The effect of granular activated carbon (GAC) addition on the removal of diclofenac, ibuprofen, metoprolol, galaxolide and triclosan in a up-flow anaerobic sludge blanket (UASB) reactor was studied. Prior to the reactor studies, batch experiments indicated that addition of activated carbon to UASB sludge can decrease micropollutant concentrations in both liquid phase and sludge. In continuous ...
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Augmenting granular activated carbon with natural clay for multicomponent sorption of heavy metals from aqueous solutions
Multicomponent adsorption of Cd, Cr, Cu, Pb and Zn onto date palm pits based granular activated carbon (GAC) augmented with highly active natural clay at different proportion was investigated. The effects of the initial pH and the adsorbents mixed ratio on the removal selectivity sequence of the metals evaluated. Batch adsorption experiments were undertaken at initial pH 2, 6 and 12. At ...
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Characteristic numbers of granular activated carbon for the elimination of micropollutants from effluents of municipal wastewater treatment plants
Adsorption on granular activated carbon (GAC) is a promising step to extend existing treatment trains in municipal wastewater treatment plants (WWTPs) and, thus, to reduce the concentration of micropollutants (MPs) (e.g. pharmaceuticals) in wastewater. It is common practice to use characteristic numbers when choosing GAC for a specific application. In this study, characteristic numbers were ...
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The use of potassium permanganate, ozone and associated coupled processes for odor removal in drinking water: bench and pilot scale tests
Bench and pilot scale experiments were conducted to investigate and compare the preoxidation effects of potassium permanganate (KMnO4) and ozone (O3) for odor removal in drinking water. The effects of dosage, contact time, pH, as well as couple treatment with a granular activated carbon (GAC) filter were examined using bench experiments, while the effects of KMnO4 dosing points and a ...
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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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Comparison of the water purification efficiency of two different flocculation-sediment-filtration (FSF) processes in Chaohu Lake in China
A novel biofilter (BF) with the potential to improve pollutant removal when used as a substitute for sand filters in water purification processes is presented. To investigate BF's pollutant removal performance, a flocculation-sediment-biofiltration (FSBF) process was compared with a flocculation-sediment-sand filtration (FSSF) process on a lab scale, with water collected from Chaohu Lake. The ...
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Knowledge-based planning of groundwater treatment trains for an efficient drinking water supply system in urban areas
This paper presents knowledge-based planning of the most appropriate treatment schemes for drinking water supply (DWS) systems, jointly applying statistical tools and experimental tests. Milan City was chosen as the case study, its DWS system being composed of more than 20 DWS units, widespread in the urban area. First, multivariate statistical techniques (factor analysis and cluster ...
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Progressive Pulp Processes - Case Study
The pulp and paper industry is one of the largest industrial consumers of water resources within the U.S. and global economies. In the U.S., pulp and paper industry operations require, on average. 14.000 to 16.000 gal of water per metric ton of finished paper product. According to the Food and Agriculture Organization of the United Nations Secretariat, paper mill operations globally use up to ...
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Treatment of tannery wastewater for reuse by physico-chemical processes and a membrane bioreactor
Treatment of wastewater from a tannery in Greater Ho Chi Minh City (Vietnam) was investigated on a pilot scale. After pre-treatment by the tannery that included batch-coagulation and sedimentation, the wastewater was treated by dissolved air flotation, a membrane bioreactor (MBR) and granular activated carbon (GAC) for polishing the MBR effluent. The average removal efficiency for organic ...
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Ceresco Dam Case Study
Global was contracted by Terra Contracting Services, LLC to serve as Water Treatment Specialists in response to the 2010 Enbridge Oil Spill along the Kalamazoo River. An energy pipeline rupture caused 877,000 gallons of heavy crude oil to spill into Talmadge Creek in Calhoun County, Michigan, which flows into the Kalamazoo River. Global engineered a processing plant for material and slurry ...
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Treatment Solutions - Carbon Removal Case Study
Global Treatment Solutions was contracted by Republic Services to serve as carbon removal and replacement specialists. Republic uses vapor phase granular activated carbon in 55 gallon drums at a municipal solid waste landfill to treat the off gas from a vacuum truck discharge to remove foul odor. A vacuum skid, built and operated by Global, is used to remove upwards of 10,000 pounds of spent ...
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Sorption of metaldehyde using granular activated carbon
In this work, the ability of granular activated carbon (GAC) to sorb metaldehyde was evaluated. The kinetic data could be described by an intra-particle diffusion model, which indicated that the porosity of the sorbent strongly influenced the rate of sorption. The analysis of the equilibrium sorption data revealed that ionic strength and temperature did not play any significant role in the ...
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Inactivation of particle-associated Escherichia coli with chlorine dioxide
In this paper, the inactivation of both free Escherichia coli (FE) and particle-associated E. coli (PAE) with chlorine dioxide (ClO2) were investigated using granular activated carbon effluent water samples. The inactivation rate of FE was higher than that of PAE and the reactivation ratio of PAE was higher than that of FE, indicating the threat of particle-associated bacteria. Response ...
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Adsorption characteristics of Bisphenol-A on tailored activated carbon in aqueous solutions
The adsorption behavior of pharmaceuticals and personal care product, Bisphenol-A (BPA), according to four coal-based and four wood-based granular activated carbons modified using outgassing treatment, acidic treatment or alkaline treatment was studied. The adsorption isotherm results indicated that carbon surface acidity played a very important role in the adsorption of BPA. It was found ...
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