Archives :: Chementator :: Waste and Recycling

Displaying 1 - 20 of 31 stories.
October 1, 2014
Algae Systems LLC (Daphne, Ala.; www.algaesystems.com) has inaugurated a demonstration plant that integrates municipal wastewater treatment with the cultivation of biofuel-producing algae. Pretreated and disinfected municipal wastewater is passed to Algae Systems offshore floating-bag photobioreactors (PBRs), which are located in a bay off of Daphnes coast. There, the oxygen, nitrogen and phosphorous from the...
http://www.chemengonline.com/chementator/waste_and_recycling/Combine-wastewater-treatment-with-biofuel-production_12220.html
October 1, 2014
A bioreactor technology for removing organic and inorganic contaminants from industrial wastewater has been commercially launched by developer Honeywell and its subsidiary UOP LLC (Des Plaines, Ill.; www.uop.com). The launch is part of a wider initiative by UOP to respond to customer needs as it enters the industrial wastewater-treatment business. The XCeed bioreactor (diagram)is unique in its use of a...
http://www.chemengonline.com/chementator/waste_and_recycling/An-energy-saving-bioreactor-for-wastewater-treatment_12222.html
September 1, 2014
A sludge-optimization technology for municipal water-treatment facilities is poised for rapid growth after the exclusive worldwide patent-licensing rights for the technology were acquired by CNP Technology Water and Biosolids Corp. (Kenosha, Wisc.; www.cnp-tec.com). The technology, known as AirPrex, was initially developed at Berlin Water Works (Germany) in 2004, and was initially licensed to the German...
http://www.chemengonline.com/chementator/waste_and_recycling/Municipal-water-sludge-optimization-technology-poised-for-growth_12100.html
September 1, 2014
Operators and engineers in the chemical process industries (CPI) who are responsible for the daily operations associated with sludge dewatering and drying equipment are undoubtedly aware that wastewater-sludge drying is not an easy task. A large number of the problems that arise during these operations are due to the sticky phase of sludge, which makes the drying of sludge as much an art as a science...
http://www.chemengonline.com/chementator/waste_and_recycling/Challenges-of-Drying-Sticky-Wastewater-Sludge_12124.html
August 1, 2014
A new remediation approach for industrial heavy-metal waste has been developed by Lewis Environmental Services, Inc. (LES; Pittsburgh, Pa.; www.lesvc.com). The patented Enviro-Clean process adsorbs heavy metals from liquid waste streams onto a bed of specially treated granular activated carbon. Then, when the activated carbon is spent and loaded with heavy metals, the activated carbon is chemically...
http://www.chemengonline.com/chementator/waste_and_recycling/A-heavy-metal-recovery-technique-that-produces-no-waste-streams-or-sludge_12002.html
June 1, 2014
New Energy and Industrial Technology Development Organization (NEDO; Kawasaki, Japan; www.nedo.go.jp) and Global Water Recycling and Reuse Solution Technology Research Assn. (GWSTA) have developed a new water-treatment system that integrates seawater desalination with recycle water from a sewage treatment plant. In a demonstration unit installed at the Water Plaza Kitakyushu (deveolved to Kitakyushu City...
http://www.chemengonline.com/chementator/waste_and_recycling/Reduce-energy-costs-by-combining-wastewater-treatment-and-desalination_11799.html
June 1, 2014
Electrochem Technologies & Materials Inc. (Montreal, Canada; www.electrochem-technologies.com) has recently patented a process for recovering rare-earth elements (REEs) from mercury phosphor powders — a byproduct from recyclers of fluorescent lamps and light bulbs. This technology offers a sound and profitable alternative for the production of REEs compared to the mining of low-grade ores, which...
http://www.chemengonline.com/chementator/waste_and_recycling/A-process-that-recovers-rare-earth-elements-from-urban-mining_11803.html
May 1, 2014
The world’s first installation of the so-called Cohral technology — deploying a covered lagoon for anaerobic wastewater treatment — was completed last March at Oakey Abattoir Pty Ltd. in the farming region of Darling Downs, in southern Queensland, Australia. The Cohral technology originates with Global Water Engineering Ltd. (Brugge, Belgium; www.globalwe.com), now operating from its...
http://www.chemengonline.com/chementator/waste_and_recycling/Covered-lagoons-treat-wastewater-and-make-biogas-too_11709.html
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.chemengonline.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.chemengonline.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.chemengonline.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.chemengonline.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.chemengonline.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.chemengonline.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.chemengonline.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.chemengonline.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.chemengonline.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.chemengonline.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.chemengonline.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.chemengonline.com/chementator/waste_and_recycling/These-scavengers-of-water-pollutants-have-a-magnetic-attraction_10645.html
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