Archives :: Chementator :: Waste and Recycling

Displaying 21 - 29 of 29 stories.
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.chemengonline.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.chemengonline.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.chemengonline.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.chemengonline.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.chemengonline.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.chemengonline.com/chementator/waste_and_recycling/Plastics-to-oil-JV-plans-full-scale-facility_8416.html
August 1, 2011
GE Power & Water (Trevose, Penn.; ge.com) has introduced an improved membrane bioreactor (mbr) technology whose productivity is said to be 15% higher than that of its predecessor for wastewater treatment plants. The new system, called LEAPmbr, was derived from innovations to GE’s ZeeWeed 500 mbr. Glenn Vicevic, senior manager, Engineered Systems, says the system has been tested on a commercial...
http://www.chemengonline.com/chementator/waste_and_recycling/This-new-membrane-bioreactor-cuts-energy-costs-and-boosts-throughput_8291.html
June 1, 2011
Japan Atomic Energy Agency (JAEA; Ibaraki, www.jaea.go.jp) has enhanced the efficiency of a solvent-extraction process to separate organic solvents from water contaminated by radioactive waste. JAEA was able to reduce the toluene concentration from 5,000 parts per million (ppm) to below 10 ppm, which is below the...
http://www.chemengonline.com/chementator/waste_and_recycling/Improved-solvent-extraction-for-nuclear-waste-contaminated-water_8094.html
June 1, 2011
A novel method for treating industrial liquid waste employs supercritical water infused with oxygen to destroy organic compounds. Developed by Innoveox (Paris; www.innoveox.com) and based on technology patented by the French government research organization CNRS (www.cnrs.fr), supercritical water oxidation (SCWO) offers a lower-cost, environmentally friendly alternative to traditional waste-treatment...
http://www.chemengonline.com/chementator/waste_and_recycling/Supercritical-water-oxidation-for-organic-waste-treatment_8100.html
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