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Archives :: Chementator :: Waste and Recycling

Displaying 1 - 20 of 23 stories.
April 1, 2014
Lithium is an element of growing importance for the production of batteries and nuclear fuels. Because Japan relies completely on imports of this material, with the majority coming from South America, the country is looking for alternative sources for this element. The answer may be in the island-nation’s own “backyard” — namely, seawater. A promising, “revolutionary”...
http://www.che.com/chementator/waste_and_recycling/A-promising-process-to-recover-Li-from-seawater_11597.html
April 1, 2014
Separation of micron-sized oil droplets from water is difficult by conventional methods. A Chinese team has developed an oleophilic array of conical needle structures that can continuously collect micron-sized oil droplets from an oil-water mixture with high efficiency and high throughput. The team includes staff from the Institute of Chemistry of the Chinese Academy of Sciences, Dept. of Chemistry at...
http://www.che.com/chementator/waste_and_recycling/Imitating-nature-leads-to-a-separator-for-oil-droplets_11601.html
March 1, 2014
Geo-Cleanse International, Inc. (Mata- wan, N.J.; www.geo-cleanse.com) has developed a new method for ridding soil and groundwater of chloromethanes, Freon and other difficult-to-treat contaminants without the need for digging and offsite soil treatment. The Geo-Cleanse process was inspired by research at Washington State University by Rick Watts, who found that hydrogen peroxide could react with MnO2 to...
http://www.che.com/chementator/waste_and_recycling/In-situ-chemical-remediation-of-soil-and-groundwater_11506.html
March 1, 2014
GlyEco Inc. (Phoenix, Ariz.; www.glyeco.com) has developed a process for recovering and purifying ethylene glycol from a number of industrial byproduct and waste streams so that it meets an ASTM International (West Conshohocken, Pa.; www.astm.org; formerly American Society for Testing and Materials) specification for use in virgin-grade antifreeze. Processes for recycling ethylene glycol currently exist...
http://www.che.com/chementator/waste_and_recycling/Recovering-and-purifying-byproduct-and-waste-ethylene-glycol_11509.html
January 1, 2014
Australian researchers have developed a method of cleaning arsenic out of contaminated water by combining the effects of bacteria and microalgae. Professor Megh Mallavarapu and his team, from the Cooperative Research Center for Contamination Assessment and Remediation of the Environment (CRC CARE; www.crccare.com) and the University of South Australia (both Mawson Lakes, South Australia; www.unisa.edu.au)...
http://www.che.com/chementator/waste_and_recycling/Bacteria-and-algae-team-up-to-tackle-arsenic-contaminated-water_11348.html
January 1, 2014
A new method for removing uranium and other heavy metals (HMs) from wastewater has been developed by researchers at the University of Eastern Finland (Joensuu; www.uef.fi). The technology has been licensed by Oy Chemec AB (Espoo, Finland; www.chemec.fi), which plans to commercialize the technology under the tradename CH Collector. Conventional methods for removing HM from water typically require adding...
http://www.che.com/chementator/waste_and_recycling/A-new-adsorbent-to-recover-uranium-and-other-heavy-metals-from-wastewater_11357.html
December 1, 2013
Construction of a large-scale waste-to-energy plant will start in the middle of next year in Port Hedland, Western Australia, and operation is scheduled to commence in the second quarter of 2015. The plant will be built by the New Energy Corp. (Perth; www.newenergycorp.com.au), and will employ low-temperature gasification technology invented and developed by Western Australian company Entech Renewable...
http://www.che.com/chementator/waste_and_recycling/This-gasification-process-turns-waste-into-syngas_11260.html
December 1, 2013
The effluent discharged by domestic industries in Japan amounts to approximately 11.1 billion ton/yr. Most of this waste is comprised of relatively low concentrations of organic matter. Today, most of this effluent is treated by aerobic biotreatment (activated sludge). However, activated sludge treatment not only consumes large amounts of electric power needed to run blowers or fans, but it also produces...
http://www.che.com/chementator/waste_and_recycling/Making-biogas-from-waste-with-a-low-organic-content_11264.html
November 1, 2013
Harvest Power (Waltham, Mass.; www.harvestpower.com) recently began operation of the first commercial-scale, high-solids anaerobic digester in North America. The facility produces biogas from food waste and yard waste in Richmond, B.C., Canada. “The anaerobic digester employs essentially the same biology that you would see in the stomachs of...
http://www.che.com/chementator/waste_and_recycling/First-commercial-scale-high-solids-anaerobic-digester-in-North-America_11129.html
September 1, 2013
High fluxes and micro-contaminant reduction have been achieved in a 2.5-m3/h pilot plant to test the performance of ceramic membranes and ozonation in treating wastewater at Melbourne Water’s (www.melbournewater.com.au) Eastern Treatment Plant. The project, to be completed in a few months, is testing CeraMac technology from PWN Technologies (Velserbroek, the Netherlands; www.pwntechnologies.nl)...
http://www.che.com/chementator/waste_and_recycling/Ceramic-membranes-and-O3-combine-to-treat-wastewater_10914.html
August 1, 2013
CSIRO Minerals Down Under Flagship (Perth, Western Australia; www.csiro.au/MDU) has developed a method that uses hydrotalcite formation to simultaneously remove contaminants from mining and industrial wastewaters in a single step. Current wastewater-treatment processes typically produce lime-based slurries, often with large amounts of water, which requires additional treatment. In contrast, hydrotalcites...
http://www.che.com/chementator/waste_and_recycling/A-solid-way-to-eliminate-contaminants-from-wastewater_10776.html
July 1, 2013
A process that uses magnetic nanoparticles, coated with a reactive material, to clean up contaminated water for human use is being developed at Stanford University (Stanford, Calif.; www.stanford.edu). The nanoscavengers, as they are called, are distributed in the water to kill pollutants, then are recovered magnetically for re-use. Stanford’s particles are...
http://www.che.com/chementator/waste_and_recycling/These-scavengers-of-water-pollutants-have-a-magnetic-attraction_10645.html
March 1, 2013
An ultraviolet oxidation process for the destruction of water-borne organic contaminants that combines UV with chlorine, rather than hydrogen peroxide, is being developed by MIOX Corp. (Albuquerque, N.M.; www.miox.com). The company’s Advanced Oxidation Process (AOP) promises to be less expensive than traditional AOP treatment methods, says Susan Rivera, manager of research and development. AOP...
http://www.che.com/chementator/waste_and_recycling/A-cheaper-way-to-destroy-organic-contaminants_10259.html
February 1, 2013
A water-recycling system for the oil-and-gas industries developed by Ecosphere Technologies Inc. (Stuart, Fla.; www.EcosphereTech.com) is designed to destroy bacteria and control corrosion in high-volume wastewater-treatment applications using a proprietary oxidation process. The technology, called Ozonix, improves the mass-transfer efficiency of ozone with a Venturi system in which negative pressure...
http://www.che.com/chementator/waste_and_recycling/Oxidation-based-water-reuse-technology-that-improves-mass-transfer_10150.html
October 1, 2012
A process developed by Lehigh Technologies (Lehigh; Tucker, Ga.; www.lehightechnologies.com) for embrittling and milling rubber from end-of-life vehicle-tire material is capable of generating micron-scale rubber particles that can be used in a host of rubber, foam and plastic products to lower costs while maintaining performance. The process (flowsheet) depends on a specially designed turbo mill that...
http://www.che.com/chementator/waste_and_recycling/A-cryogenic-turbo-mill-generates-rubber-powder-from-recycled-tires_9761.html
February 1, 2012
A newly demonstrated system for removing trace levels of heavy metals from water combines the positive traits of two existing technologies — chemical precipitation and electrowinning — while avoiding drawbacks of each. An engineering team at Brown University (Providence, R.I.; www.brown.edu), led by Joseph Calo, described the cyclic-electrowinning-precipitation (CEP) process in a recent issue...
http://www.che.com/chementator/waste_and_recycling/Heavy-metal-removal-process-joins-advantages-of-two-existing-technologies_8940.html
January 1, 2012
The Micro Auto Gasification System (MAGS) is a compact solid-waste disposal system that is designed for energy-efficient operation onboard naval vessels, in forward-operating military bases and in other isolated installations. Developed by the Office of Naval Research (ONR; Arlington, Va.; www.onr.navy.mil) and Terragon Environmental Technologies Inc. (Montreal, Ont.; www.terragon.net), the MAGS uses...
http://www.che.com/chementator/waste_and_recycling/Waste-disposal-system-for-military-operations_8831.html
November 1, 2011
To date, the difficult-to-treat contaminants and their related biological inhibition in petroleum refinery wastewater have defied efforts to bring predictive and mathematical process control to biological wastewater-treatment systems. Now, for the first time, engineers at Refinery Water Engineering & Associates Inc. (RWEA; Los Angeles, Calif.; refinerywater.zoomshare.com) have determined the key...
http://www.che.com/chementator/waste_and_recycling/Predictive-process-control-at-a-refinery-wastewater-treatment-plant_8612.html
October 1, 2011
A 60% reduction in the sludge volume was achieved at the sewage treatment plant of Noboribetu City, Hokkaido, Japan, after installing a Bio-Diet SBD-1200 system from Nippon Steel Kankyo Engineering Co. (NSKE; Tokyo, www.nske.co.jp). The demonstration unit, developed at the Wakayama Cleanup Center of Noboribetu City, was tested during the...
http://www.che.com/chementator/waste_and_recycling/Slash-sewage-sludge-volumes-with-this-add-on-digester_8504.html
September 1, 2011
A joint venture (JV) between Vadxx Energy LLC (Akron, Ohio; www.vadxx.com) and Greenstar Recycling (Houston; www.greenstarrecycling.com) plans to start up a facility in mid-2012 to convert recovered plastics to synthetic crude oil. When complete, the facility will produce 80,000 bbl/yr of synthetic crude oil from 12,000 ton/yr of solid municipal plastics. Using a thermal depolymerization process, the JV...
http://www.che.com/chementator/waste_and_recycling/Plastics-to-oil-JV-plans-full-scale-facility_8416.html
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