activated carbon Articles
-
Water and Wastewater Treatment Chemicals: World Market Report
Provides continually updated analyses and forecasts for 11 product categories including activated carbon, chelates corrosion inhibitors, defoamers, ion exchange resins, inorganic flocculants, organic flocculants, oxidizers and biocides, pH adjustors, and scale inhibitors in 80 ...
-
Integrated membrane systems incorporating coagulation, activated carbon and ultrafiltration for the removal of toxic cyanobacterial metabolites from
Anabaena circinalis The use of integrated membrane systems (a train of treatment processes incorporating one or more membranes) is increasing globally as the technology is very effective for the production of high quality drinking water. In this investigation a laboratory scale integrated membrane system (IMS) featuring coagulation, powdered activated carbon (PAC) and ultrafiltration (UF) was investigated for the ...
-
In Situ Sediment Treatment Using Activated Carbon: A Demonstrated Sediment Cleanup Technology
This paper reviews general approaches for applying activated carbon (AC) amendments as an in situ sediment treatment remedy. In situ sediment treatment involves targeted placement of amendments using installation options that fall under two general approaches: 1) direct application of a thin layer of amendments (which potentially incorporate weighting and/or binding materials) to surface ...
-
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 ...
-
Experiences with the conventional pretreatment system in the seawater reverse osmosis plant at Kalpakkam
A 1800 m³/day Seawater Reverse Osmosis (SWRO) plant was commissioned in October 2002 at Kalpakkam, India, as part of the Nuclear Desalination Demonstration Project (NDDP). The conventional pretreatment scheme was adopted consisting of a lamella clarifier, pressurised sand filter, activated carbon filter and cartridge filter. The dosing of pretreatment chemicals, ferrous sulphate and ...
-
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 ...
-
Fluorescent microspheres as surrogates to assess oocyst removal efficacy from a modified slow sand biofiltration water treatment system
There has been a resurgence of interest, technological advancement, and implementation of biologically active slow sand filtration technologies for small-scale potable water treatment in North America. Modelling the fate and transport of pathogenic microorganisms is vital to assess technological safety and for licensing, permitting and regulatory validation. The efficacy of a modified slow sand ...
-
RO brine treatment and recovery by biological activated carbon and capacitive deionization process
The generation of brine solutions from dense membrane (reverse osmosis, RO or nanofiltration, NF) water reclamation systems has been increasing worldwide, and the lack of cost effective disposal options is becoming a critical water resources management issue. In Singapore, NEWater is the product of a multiple barrier water reclamation process from secondary treated domestic effluent using ...
-
Comparison of O3 + GAC, O3 + H2O2 + GAC, and GAC unit operation on natural organic matter and taste and odor causing compounds removal using a pilot plant study
Removal of natural organic matter (NOM) and taste and odor problems in drinking water are a sensitive issue in municipal water treatment plants. This study investigated the effectiveness of ozone (O3) + granular activated carbon (GAC), O3 + hydroperoxide (H2O2) + GAC, and GAC processes using a pilot scale plant to remove NOM and geosmin (50–1,000 ng/L), and 2-methylisoborneol (2-MIB: 50–300 ...
-
Abundance and diversity of ammonia-oxidizing archaea and bacteria on biological activated carbon in a pilot-scale drinking water treatment plant with different treatment processes
The effects of different placements of rapid sand filtration on nitrification performance of BAC treatment in a pilot-scale plant were evaluated. In this plant, rapid sand filtration was placed after ozonation-BAC treatment in Process (A), while it preceded ozonation-BAC treatment in Process (B). Analysis of amoA genes of ammonia-oxidizing archaea (AOA) and bacteria (AOB) combined with ...
-
Removal of natural organic matter and trihalomethane formation potential in a full-scale drinking water treatment plant
A multidisciplinary approach was applied in this work to characterise natural organic matter and evaluate the performance of a full-scale waterworks treating organic-rich surface water. It was shown that the combination of the treatment processes considered efficiently removed the dissolved organic matter, including its specific fractions. Most of the dissolved organic carbon and nitrogen (DOC ...
-
Removal of APIs and bacteria from hospital wastewater by MBR plus O3, O3 + H2O2, PAC or ClO2
The objective of this study has been to develop technologies that can reduce the content of active pharmaceutical ingredients (APIs) and bacteria from hospital wastewater. The results from the laboratory- and pilot-scale testings showed that efficient removal of the vast majority of APIs could be achieved by a membrane bioreactor (MBR) followed by ozone, ozone + hydrogen peroxide or ...
-
Practical challenge testing of a ceramic membrane module in a full-scale mobile drinking water treatment system
Challenge testing was carried out of full-scale prefiltration and ceramic ultrafiltration (UF) modules in a mobile drinking water treatment system. Three consecutive indirect integrity tests were performed using naturally contaminated public drinking water, stocking with wastewater as well as addition of powdered activated carbon. Besides checking the removal efficiency and integrity of the ...
-
Review of cost versus scale: water and wastewater treatment and reuse processes
The US National Research Council recently recommended direct potable water reuse (DPR), or potable water reuse without environmental buffer, for consideration to address US water demand. However, conveyance of wastewater and water to and from centralized treatment plants consumes on average four times the energy of treatment in the USA, and centralized DPR would further require upgradient ...
-
Removal of DOM and AOC in a full-scale advanced water treatment plant: effects of operational periods of BAC filters
Water utilities in Japan want to reduce residual chlorine levels so as to reduce disinfection byproducts and the chlorine smell, but bacterial regrowth is a concern. In advanced water treatment plants using ozonation and biological activated carbon (BAC), BAC plays the most important role in reducing assimilable organic carbon (AOC). Therefore, we analyzed the removal of dissolved organic ...
-
On-site evaluation of the removal of 100 micro-pollutants through advanced wastewater treatment processes for reuse applications
The next challenge of wastewater treatment is to reliably remove micro-pollutants at the microgram per litre range in order to meet reuse applications and contribute to reach the good status of the water bodies. A hundred priority and relevant emerging substances were measured to evaluate at full-scale the removal efficiencies of seven advanced treatment lines (one membrane bioreactor process and ...
-
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 ...
-
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) ...
-
Dissolved and colloidal organic nitrogen removal from wastewater treatment plants effluents and reject waters using physical–chemical processes
Four physical–chemical processes were compared in terms of the efficiencies of dissolved and colloidal organic nitrogen (DON and CON) removal from the secondary effluents (SE) and reject water from full-scale biological nutrient removal activated sludge systems. Adsorption on activated carbon was most efficient and allowed removal from the SE of up to 80% and 100% of DON ...
-
In-Pile thermal desorption for treatment of Dioxin-Contaminated soil in Japan
Abstract A demonstration of thermal treatment of dioxin-contaminated soil was completed in Japan, under the sponsorship of the Japan Ministry of the Environment. TerraTherm’s proprietary In-Pile Thermal Desorption process was demonstrated to successfully treat the soil to the required standard of 1,000 picograms of 2,3,7,8-tetrachlorodibenzodioxin (TCDD) toxic equivalents (TEQ) per gram ...
Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you