powdered activated carbon Articles
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Organic micro-pollutants’ removal via anaerobic membrane bioreactor with ultrafiltration and nanofiltration
The removal of 15 organic micro-pollutants (OMPs) in synthetic municipal wastewater was investigated in a laboratory-scale mesophilic anaerobic membrane bioreactor (AnMBR) using ultrafiltration and AnMBR followed by nanofiltration (NF), where powdered activated carbon (PAC) was added to enhance OMPs removal. No significant effects of OMPs spiking and NF connection on bulk organics removal and ...
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Pulse shear stress for anaerobic membrane bioreactor fouling control
Increase of shear stress at membrane surfaces is a generally applied strategy to minimize membrane fouling. It has been reported that a two-phase flow, better known as slug flow, is an effective way to increase shear stress. Hence, slug flow was introduced into an anaerobic membrane bioreactor for membrane fouling control. Anaerobic suspended sludge was cultured in an anaerobic membrane ...
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Oily wastewater treatment by adsorption–membrane filtration hybrid process using powdered activated carbon, natural zeolite powder and low cost ceramic membranes
In this research, four types of low cost and high performance ceramic microfiltration (MF) membranes have been employed in an in-line adsorption–MF process for oily wastewater treatment. Mullite, mullite-alumina, mullite-alumina-zeolite and mullite-zeolite membranes were fabricated as ceramic MF membranes by low cost kaolin clay, natural zeolite and α-alumina powder. Powdered activated carbon ...
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Hybrid membrane process: Performance evaluation of biological PAC
This study investigated the use of biological powdered activated carbon (PAC) for the removal of natural organic matter (NOM) and ammonia from drinking water. The impact of solids retention time (SRT), hydraulic retention time (HRT), PAC diameter and PAC concentration on the process efficiency was evaluated. Five bioreactors were filled with a slurry using two PAC concentrations (5 or 25 g l−1), ...
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Influence of nanoparticles on the polymer-conditioned dewatering of wastewater sludges
The effect of using small-scale, high surface area, nanoparticles to supplement polymer-conditioned wastewater sludge dewatering was investigated. Aerobically digested sludge and waste activated sludge sourced from the Hunter Valley, NSW, Australia, were tested with titanium dioxide nanoparticles. The sludge samples were dosed with the nanoparticles in an attempt to adsorb a component of the ...
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Anion exchange pretreatment for the removal of natural organic matter from humic rich water
The treatment of humic rich water using anion exchange, coagulation and PAC-adsorption was studied, both independently and in sequence in that order. The commercial aluminium-based coagulant PAX-16, powdered activated carbon W35 and the magnetic ion exchange resin (MIEX®) were used in the study. The source of humic substances was natural water (25.0 g C/m3 as DOC) flowing out from the Great ...
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A large‐scale field trial of thin‐layer capping of PCDD/F‐contaminated sediments: Sediment‐to‐water fluxes up to five years post‐amendment
The longer‐term effect (3‐5 y) of thin‐layer capping on in situ sediment‐to‐surface water fluxes was monitored in a large‐scale field experiment in the polychlorinated dibenzodioxin and dibenzofuran (PCDD/F) contaminated Grenlandfjords, Norway (four trial plots of 10,000 to 40,000 m2 at 30 to 100 m water depth). Active caps (designed thickness 2.5 cm) were established in two fjords, consisting ...
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Use of a Magnetic Ion Exchange Resin to Improve DBP Precursor Removal and Reduce Coagulant Usage at Lee County`s OLGA WTP
The 5 MGD Olga WTP in Lee County, Ft Myers, treats water from the Caloosahatchee River where TOC and color levels range from 15-25mg/L and 80-350 Pt Co Units respectively. This surface water presents many treatment challenges and treatment costs are high with alum doses in excess of 200mg/L required during times of the year to provide an adequate treated water quality. As part of Lee County’s ...
By Ixom
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Recreational lake & raw water reservoir - Case study
Topics: raw water, blue-green algae, cyanobacteria, taste & odor, treatment savings, water clarity Overview: This Lake serves as a recreational and raw water reservoir, providing about 30% of the total drinking water supply to a large city. The lake, constructed in 1954, is approximately 11,800 surface acres, with a maximum depth of 50 ft, an average depth of 11 ft, and a current capacity ...
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Biofiltration: An Innovative Technology for The Future
Biofiltration refers to the biological transformation or treatment of contaminants present in the gas phase, usually air. The fact that air contaminants can be biodegraded by active bacteria has been known for quite some time. However, it is only in the last 10 years, that biofiltration has begun to emerge as an economically viable treatment process. Initially, biofiltration involved the use of ...
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Major Investment in PFAS Cleanup Projected
These dangerous ‘forever chemicals’ are found in water and food supplies Per- and polyfluoroalkyl substances (PFAS) are man-made chemicals that are so resistant to breakdown in the environment and the human body that they have earned the popular moniker “forever chemicals.” They are associated with low birth weight, immune and endocrine system interference, and cancer. ...
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Re-agent dosing - Sodimate installs standardised equipment to meet the specifications of each plant case study
Water quality refining is the most essential step in water treatment processes. When done properly, it guarantees palatable taste characteristics suitable for drinking water. The reliability and accuracy of the processes for storing, metering, and dissolving the required re-agents are indispensible for successfully completing this final treatment. Outlined below is a case story about Viry- ...
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Blue-Green algae control and WTP cost savings (ID206) - Case study
Topics: Raw water, blue green algae, taste and odor, treatment savings, improve fishery, water clarity Customer: Information is available upon request from Medora Corporation. 866-437-8076 info@medoraco.com Overview: This lake is an 850+ acre man-made reservoir feeding the a Water Treatment Plant (WTP) for a county. The WTP production capacity was ten (10) to twelve (12) million gallons per day ...
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Effective VOC hazardous waste gas treatment technology
Organic waste gas adsorption treatment, which is a treatment method that physically adsorbs and collects VOC. Activated carbon, zeolite, silica, etc. are used as adsorbents. Due to its size, the pores of the adsorbent are called micropores with a diameter of 2 nm or less, mesopores with a diameter of 2 to 50 nm, and macropores with a diameter of 2 nm or more. It is the micropores that increase ...
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Sugar Manufacturing Industry - Pollution Prevention Guidelines
Introduction Pollution Prevention Guidelines to provide technical advice and guidance to staff and consultants involved in pollution-related projects. The guidelines represent state-of-the-art thinking on how to reduce pollution emissions from the production process. In many cases, the guidelines provide numerical targets for reducing pollution, as well as maximum emissions ...
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Catalytic filter technology provides important flexibilityfor controlling PM, NOx, SOx, O-HAPS - Case study
Catalyst-embedded ceramic filters offer a way to remove NOx at lower temperatures, while simultaneously removing PM, SOx, and HCI. The technology also removes organic hazardous air pollutants, THC, dioxins, and mercury. Applications include the Cement NESHAP; Boiler MACT; incinerator CISWI MACT; Hazardous Waste MACT; glass furnaces; ceramics manufacturing, including tracking proppants, kilns, ...
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New treatment plant to feature ceramic membranes
The Parker Water and Sanitation District (PWSD) in Colorado has contracted for a membrane treatment system for its Rueter-Hess water treatment plant project. The new plant will treat water from the Rueter-Hess Reservoir (RHR), which is being built three miles southwest of downtown Parker on Newlin Gulch, which is a tributary drainage of Cherry Creek. The reservoir and associated treatment plan ...
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Biochar‐mediated reductive transformation of nitro herbicides and explosives
Biochar, a subset of black carbon produced via pyrolysis of biomass, has received much attention in recent years due to its potential to address many important issues, from energy and climate to agriculture and environmental quality. Biochar is known to influence the fate and transport of organic contaminants, although its role has been generally assumed to be as an adsorbent. In this study, ...
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FGD, DeNOx, DeSOx – control precisely the absorber/neutralizer injection - Case Study
Material: raw gases HCl, NOx, Hg, SO2, (CO, O2, H2O) Installation: before the injection point Function: online monitoring of gas parameters allowing for precise adjustment of absorber/neutralizer injection, to comply with emission regulations (ELV) (9) •• Pollutants abatement During combustion or incineration process, acids are produced due to the composition of the fuels or plastics ...
By ENVEA
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Arsenic removal from groundwater using low-cost carbon composite electrodes for capacitive deionization
Affordable carbon composite electrodes were developed to treat low-concentrated groundwater using capacitive deionization (CDI). A carbon slurry prepared using activated carbon powder (ACP), poly(vinylidene fluoride), and N-methyl-2-pyrrolidone was employed as a casting solution to soak in a low-cost porous substrate. The surface morphology of the carbon composite electrodes was investigated ...
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