SG179388A1 - An integrated selenium removal system for,
An Integrated Selenium Removal System for Waste Water AbstractThe inventive process scheme and its various embodiments described herein will comprise filtering a selenium containing water by reverse osmosis or nanofiltration to produce a primary permeate stream at least meeting the water stream effluent discharge requirements of the location and a concentrate stream containing the removed,CA2812455A1 - An integrated selenium removal system for,,The inventive process scheme and its various embodiments described herein will comprise filtering a selenium containing water by reverse osmosis or nanofiltration to produce a primary permeate...US9567249B2 - Integrated selenium removal system for,The inventive process scheme and its various embodiments described herein will comprise filtering a selenium containing water by reverse osmosis or nanofiltration to produce a primary permeate...WO2012040525A1 - An integrated selenium removal,The inventive process scheme and its various embodiments described herein will comprise filtering a selenium containing water by reverse osmosis or nanofiltration to produce a primary permeate...SELEN-IXTM: SELENIUM REMOVAL FROM MINING AFFECTED,New Selenium Removal Technology This paper describes Selen-IX™, a novel integrated process developed by BioteQ for the selective removal of both selenite and selenate from water to concentrations below 5 µg/L. Selen-IX™ does so with minimal co-removal of other species from a wide range of water compositions. As Selen-IX™ involvesINTEGRATED SELENIUM REMOVAL SYSTEM FOR WASTE,The inventive process scheme and its various embodiments described herein will comprise filtering a selenium containing water by reverse osmosis or nanofiltration to produce a primary permeate stream at least meeting the water stream effluent discharge requirements of the location and a concentrate stream containing the removed selenium and other species, a RO or NF concentrate treatment specific to the case which will treat and reduce the seleniumSELEN-IXTM: SELENIUM REMOVAL FROM MINING AFFECTED RUNOFF,,New Selenium Removal Technology This paper describes Selen-IX™, a novel integrated process developed by BioteQ for the selective removal of both selenite and selenate from water to concentrations below 5 µg/L. Selen-IX™ does so with minimal co-removal of other species from a wide range of water compositions. As Selen-IX™ involvesUS20130334134A1 - Integrated selenium removal system,US20130334134A1 US13/825,725 US201113825725A US2013334134A1 US 20130334134 A1 US20130334134 A1 US 20130334134A1 US 201113825725 A US201113825725 A US 201113825725A US 2013334134 ASelenium Removal Process - Headworks International,remove selenium through precipitation a high quantity of iron is required. This process results in higher sludge production and higher disposal costs. Challenges faced in selenium removal . This is a more cost-effective technique than precipitation. In this the soluble selenium oxides (selenate and selenite) are converted to elemental selenium which can be easily removed.Taking an Integrated Approach to Selenium Removal at,07/10/2013· Mauro Marinetti’s paper “Selenium Removal from a Refinery Wastewater: Integrated Approach from Source Control to Wastewater Treatment” will be presented by co-author Kar Munirathinam,CH2M HILL, on Tuesday, October 8 at 10:30 a.m. in TS303, during the Water Environment Federation Technical Exhibition and Conference , in Chicago, Illinois.
Removal of selenium from water with nanoscale zero
15/03/2015· Removal of selenium from water with nanoscale zero-valent iron: Mechanisms of intraparticle reduction of Se(IV), (Cs-STEM) integrated with X-ray energy dispersive spectroscopy (XEDS). This method was utilized to visualize solid phase translocation and transformation of Se(IV) such as diffusion, reduction, deposition and the effect of surface defects in a single nanoparticle. Se(IV) was,Advancement in Non-Biological Selenium Removal Treatment,,High capital and O&M costs of integrated biological treatment systems (Utility Water Act Group 2017) Non-biological treatment processes most often considered for selenium removal include ferric co-precipitation, reverse osmosis (RO) and nanofiltration (NF) membrane treatment, limited-use sorbents and Selen-IX™. Ferric co-precipitation and electrocoagulation Ferric can be dosed into water,BQE Water Receives US Patent for Selen-IX™ Selenium,,Selen-IX™ is a water treatment process technology that combines ion exchange and electro-reduction to remove selenium from large volumes of wastewater. As a purely physico-chemical process, Selen-IX™ is insensitive to water temperature and is highly adaptable toModeling of selenium and tellurium removal from,01/03/2015· The Luilu plant (Katanga Mining), as the world's largest cobalt producer, was the first operating plant to use cuprous ions to remove selenium and tellurium from copper electrolyte solution (Charles and Hannaert, 1970). Considering the advantages of cuprous ions and the lower reagent costs associated with it, sulfur dioxide has been replaced with cuprous in the selenium and telluriumRemoval of gas-phase arsenic and selenium in flue gas by,The maximum removal efficiency for arsenic can be obtained at the liquid-gas ratio of 10 L/m 3, and for selenium, the maximum removal efficiency will be reached at 14 L/m 3. For the technology of spray-and-scattered-bubble, chemical reaction and mass transfer jointly play the role in contaminant removal. By changing the immersion depth and measuring the corresponding pressure drop, the weight assignedMethod and system for removal of selenium from FGD,,The pickle liquors are typically obtained from industrial production operations that may not be integrated with the steam-electric power generating industry. When the pickle liquor is obtained from sources separate and apart from the steam-electric power generating industry, the process of this invention serves the combined purposes of selenium removal and hazardous substance detoxification. A,Taking an Integrated Approach to Selenium Removal at,07/10/2013· Overall, the pilot plant study helped the refinery identify ways to optimize its operating conditions by developing an integrated approach to effectively remove selenium from its wastewater. Study results allowed for design of a plant treating 1/5 of the “end of pipe” flow rate (reducing therefore the size of the plant) and helped the refinery to develop a design parameter for the full – scaleAdvancement in Non-Biological Selenium Removal Treatment,,Tetravalent selenium needs to be converted into one of the ionic forms of biselenite or selenite in order to attach to the surface of the ferric solids Because the removal of tetravalent selenium by ferric co-precipitation is highly efficient, tetravalent selenium removal is generally not an issue and is often easily incorporated into waterRemoval of selenium from water with nanoscale zero,15/03/2015· Increasing evidences suggest that nanoscale zero-valent iron (nZVI) is an effective agent for treatment and removal of selenium from water. For example, 1.3 mM selenite was quickly removed from water within 3 min with 5 g/L nZVI. In this work, reaction mechanisms of selenite [Se(IV)] in a single core–shell structured nanoscale zero-valent iron (nZVI) particle were studied with the method ofSelenium removal from petroleum refinery wastewater,15/02/2019· Electrocoagulation (EC) of wastewater from a petroleum refinery is a promising tool to remove selenium by adsorption and/or co-precipitation with iron hydroxides. With the use of a batch airlift reactor a selenium removal of 90% was achieved after 6 h
INTEGRATED SYSTEM FOR SALT AND SELENIUM
1994032025 - 1994-03-08 - neg - integrated system for salt and selenium removal-irrigatedRemoval of Selenium from Petroleum Refinery,Removal of selenium is dependent on its speciation and on concentrations of other contaminants in the wastewater. Iron coprecipitation, in which iron salts are added to the wastewater and selenium is removed on the surface of precipitated iron hydroxide, is most effective at removing selenite. Selenate is more loosely bound to iron hydroxide than selenite, and sulfate competes with selenate,Method and system for removal of selenium from FGD,,The inhibiting constituents (O 2, NO 3-, HCO 3-, Ca 2 +, Mg 2 +) cited by Moody and Murphy (1989) in their paper on treating toxic substances in agricultural water supply and drainage, Selenium Removal with Ferrous Hydroxide: Identification of Competing and Interfering Solutes, (Pan American Regional Conference--1989) were determined to either not be present or to be a minor influence on the rate ofSelenium Removal From Ground Water Using Activated,As is seen from the graph, selenium removal efficiencies of 90 percent are achieved with as little as five minutes of rinsing. In all the following batch scale tests, a 50 minute rinse with 1 percent NaOH was used with fresh activated alumina to ensure optimum removals of selenium. Following the caustic rinse, a 5-minute rinse with 150 ml of deionized water was found to be necessary as an intermediate step(PDF) Selenium Removal Using Ca-Based Sorbents:,Selenium Removal Using Ca-Based Sorbents: Reaction Kinetics. April 1998; Environmental Science and Technology 32(12) DOI: 10.1021/es971119j. Authors:Can Microalgae Remove Pharmaceutical Contaminants,01/01/2018· The removal efficiency of selenium was significantly increased in the integrated process (algal remediation with CW) and reduced the risk of the buildup of ecotoxic forms of selenium . The nitrogen removal performance was enhanced in the high rate algal ponds/constructed wetlands hybrid systems and was significantly higher than that in a single,,,,,