Selenium speciation and therefore remediation is highly dependent on pH and redox potential (Eh). A simplified selenium-water system Pourbaix diagram showing major thermodynamically stable selenium species as a function of pH and Eh is shown in Figure 1 (Microbial Technologies 2005).
Selenium concentration in industrial effluents may vary from 1 to 7000 μg/L. This paper reviews various treatment technologies for the removal of selenium from water and wastewater such as sedimentation, filtration, activated carbon adsorption, ion exchange, reverse …
"Honeywell UOP's XCeed bioreactor technology was selected above other technologies after a successful field demonstration for selenium removal," said Jim Stump, senior vice president of refining for HollyFrontier. "Honeywell UOP has a long history as a supplier to HollyFrontier's subsidiaries.
Oct 13, 2016· The objectives of the pilot campaign will be to: demonstrate selenium removal to reach discharge targets on a continuous basis, generate design criteria for a full scale plant, and develop a ...
Technologies Ion Exchange Bioreactors Air Treatment Biofilters Regeneration Mobile Treatment Chemical Purification Integrated Operations Services Cartridge Filtration Advanced Metals Removal System (AMRS) Small Systems Contaminants Perchlorate Nitrate Arsenic Iron/Manganese
AM-16-74 Page 1 REMOVAL OF SELENIUM FROM REFINERY WASTEWATER USING THE HONEYWELL UOP XCEED™ BIOREACTOR SYSTEM Lori C. Donovan, R.E. Hanson, William Sheridan & F. Stephen Lupton Honeywell UOP UOP Industrial Wastewater Technologies …
the implementation of carbon capture technologies • Flue Gas Desulfurization (FGD) treatment is incorporated in most coal burning power generation plants to remove sulfur dioxide and various oxides of nitrogen by either wet/dry scrubbing. • Wet scrubber blowdown often contains heavy metals (selenium,
Sep 03, 2017· MSE Technology Applications Inc. (MSE) (2001) Final report—Selenium treatment/removal alternatives demonstration project Mine Waste Technology Program Activity III Project 20 Report prepared for US Environmental Protection Agency National Energy Technology Laboratory Office of Research and Development Cincinnati OH and US Department of Energy ...
Nov 04, 2016· Selenium removal technology. Achieving these new levels is easier said than done. Selenium is a slippery, multi-headed problem for mining. For starters, any technology has to treat large volumes of water to remove tiny traces of selenium.
The selenium removal technology will be demonstrated on a bench scale as described below. Goal 2) The second goal of the project is to propose a selenium recovery process that uses the selenium-containing sludge from your selected selenium removal technology to make a salable selenium …
is used for many kinds of wastewater including Selenium removal. The benefit of using RO membranes is that they are not selective and will remove all ion species and not just Selenium like the special digester system and the iron filings technology. Where the specific focus was Selenium removal, New
the majority of these constituents along with selenium. This additional removal increases overall treatment and waste disposal costs as these removal technologies produce a waste by-product with specific disposal requirements. Selenium Speciation When selenium enters the aquatic environment, it is typically in the form of oxyanions, selenite and
Selenium Removal from Refinery Wastewater Using Immobilized Cell Bioreactor Technology XCeedTM Bioreactor Technology for Selenium Removal High Density Biomass Provides Robustness, Space & OPEX Savings Features Benefits Reduces selenium levels up to 99% Meets regulatory requirements for selenium discharge High Density Fixed Film Biomass
CH2M has written a comprehensive review article on selenium removal technologies for the North American Metals Council. This 233-page report includes specific approaches to selenium management for mining, agriculture, power generation, and oil and gas.
remove selenium, there are very few technologies that have successfully and/or consistently removed selenium in water to less than 5 μg/L at any scale. There are still fewer technologies that have been demonstrated at full-scale to remove selenium to less than
Crystal Clear Technologies uses nano-materials in their patented NMX™ to reach single digit ppb to low ng/L metal removal in high TDS wastewater. Fortunately, there is another option when it comes to tackling the challenge of selenium removal. It may seem small on the surface, but its effect on the environment will be gigantic!
The objective of the Selenium Treatment/ Removal Alternatives Demonstration Project was to test and evaluate tech- nologies capable of removing selenium from Garfield Wetlands-Kessler Springs water to below 50 micrograms per liter (ug/L), the National Primary Drinking Water Regulation Maximum Contami- nant Level for selenium established by EPA.
THE REMOVAL OF SELENIUM FROM WATER USING ZERO VALENT IRON SYSTEMS ZVI MEDIUM SYSTEM OPERATION AND PERFORMANCE After demonstrating the technology could achieve selenium removal compliance over an extended period, the mining company received federal court permission to expand this technology to other seeps and the system was
Mar 11, 2015· Arsenic Removal Technologies: A Review ... and biological processes. Typical technologies for arsenic removal are a combination of chemical and physical processes, which will be the focus of this article. ... uses biological sulfate reduction to precipitate arsenic and heavy metals. Nitrate, selenium, and mercury may also be removed ...
Jan 17, 2014· Although technologies are capable of removing selenium from industrial wastewater, the ability to consistently and reliably remove selenium remains a challenge. Treatment of selenium using these core technologies will require primary, tertiary, and residuals treatment. The effectiveness of selenium treatment is highly dependent on species,
Six technologies were tested for their potential to remove nitrate and selenium to 5 milligrams per liter (mg/L) and 5 micrograms per liter (μg/L), respectively, using water from Warner Channel as the source.