archive-com.com » COM » W » WATERONLINE.COM

Total: 1905

Choose link from "Titles, links and description words view":

Or switch to "Titles and links view".
  • US EPA Announces 22M Settlement For Cleanup Of Cooper Drum Superfund Site In South Gate Los Angeles County
    their local groundwater Cooper Drum is a 3 8 acre site located in a commercial industrial and residential area of South Gate From 1974 until its closure in 1992 the Cooper Drum Company reconditioned used steel drums from industrial customers such as chemical manufacturers chemical packagers and oil companies The 55 gallon steel drums which contained residual oils and solvents were washed and prepared for reuse Residual wastes from the drums primarily volatile organic compounds such as trichloroethylene TCE spilled and leaked on the site contaminating soils and groundwater Cooper Drum was placed on Superfund s National Priorities List in 2001 Over the last 14 years EPA has overseen the design construction and operation of soil and groundwater treatment systems aimed at cleaning up TCE lead PCBs and petroleum hydrocarbons The site s soil vapor extraction system which has been operating since 2011 has removed over 742 pounds of chemicals from affected soils The groundwater extraction system has treated more than 17 million gallons of contaminated groundwater since 2012 All water that is served to the residents and businesses in South Gate meets state and federal drinking water standards Drinking high levels of TCE may cause damage to the nervous system liver and lungs PCBs are a known human carcinogen and may cause a variety of other adverse health effects on the immune reproductive nervous and endocrine systems Long term exposure to lead can lead to kidney problems or high blood pressure Between 2001 and 2009 EPA s cleanup activities at the Cooper Drum site relied on public funding In 2009 agency investigators were able to identify former customers of the drum reconditioning business Since then the settling parties known as the Cooper Drum Cooperating Parties Group have funded the cleanup and worked cooperatively with EPA This is the final

    Original URL path: http://www.wateronline.com/doc/u-s-epa-announces-m-settlement-for-cleanup-south-gate-los-angeles-county-0001 (2016-02-14)
    Open archived version from archive


  • Coated Magnetic Nanoparticles Used To Purify Contaminated Water
    Regulations and Legislation Providers YSI a Xylem brand Hach Company Schneider Electric Neptune Technology Group Inc Evoqua Water Technologies Veolia Water Solutions Technologies ABB Measurement Products Aclara Jacobi Carbons Endress Hauser Inc KROHNE Inc Kaeser Compressors Inc Emerson Process Management Rosemount Analytical Degremont Technologies Brentwood Industries View All Providers News December 28 2015 Coated Magnetic Nanoparticles Used To Purify Contaminated Water Iranian researchers produced a special nanosorbent to eliminate environmental pollutions Iranian researchers from Tarbiat Modarres University coated and modified the surface of magnetic nanoparticles to produce a special nanosorbent to eliminate environmental pollutions The nanosorbent can also be used in various industrial and agricultural sections to eliminate organic and inorganic compounds from polluted water after being mass produced Water contamination and obtaining optimum efficiency in purification of drinking water and industrial wastewater are among the most important concerns of human societies at the moment Although there is high concentration of organic or metal compounds in industrial water it is even more important to purify microbial pollution in drinking water specially in distant areas where it is difficult to find drinking water The researchers modified and coated the surface of ferrous magnetic nanoparticles to produce a nanosorbent to eliminate organic and inorganic pollutants from water This research tries to create stability by modifying the surface of nanoparticles and also to make selective the sorbents by selecting the appropriate coating Magnetic nanosorbents are separated very easily after the purification process by using an external magnetic field therefore there is no need for an individual separation stage or the application of centrifugal methods to recover the nanosorbent The separation and recovery processes become simpler faster and more cost effective this way The surface of magnetic nanoparticles were coated and modified by using metalorganic compounds Then the product was used to eliminate environmental

    Original URL path: http://www.wateronline.com/doc/coated-magnetic-nanoparticles-used-to-purify-contaminated-water-0001 (2016-02-14)
    Open archived version from archive

  • Testing Wastewater Using A pH Meter
    robust measurement with a pH meter It also necessitates the measurement of the waters temperature Because chemical and particulate contamination in wastewater can destroy standard pH electrodes prematurely killing the junction specialised pH electrodes are recommended A double junction electrode will block chemical interferences in the wastewater and prevent common chemical damages to the reference junction A flushable junction will handle chemical and particulates in the wastewater easily A flushable junction is ideal for sludge paper pulp and dirty samples as the easy to clean junction never clogs Testing the pH of a Wastewater Sample What s Needed A standard pH meter a durable pH electrode an automatic temperature compensation ATC probe a stirrer with stir bar 100 mL graduated cylinder 100 mL beaker deionized water and buffers The pH electrode will be exposed to chemical contaminates and particulates so a double junction electrode is recommended or for very dirty samples a flushable junction electrode Sampling Grab two to three samples from each site into a sealed container Grab samples of wastewater will off gas the volatile materials that are present which could alter the pH level of the sample Therefore samples must be collected into a sealed container Time delays between grabbing the sample and measuring the pH value should be avoided No sample preservative or preparation required Laboratory Testing We recommend a 2 point calibration with a pH 4 and a pH 7 buffer solution for more acidic waste and a pH 7 and a pH 10 buffer solution for more basic waste The electrode slope should be between 92 and 102 Just before testing use a graduated cylinder to measure 60 mL of the wastewater sample into a 100 mL beaker Stir the sample Note Allowing wastewater samples with a pH greater than 7 to be exposed

    Original URL path: http://www.wateronline.com/doc/testing-wastewater-using-a-ph-meter-0001 (2016-02-14)
    Open archived version from archive

  • Tucson’s AOP Water Treatment Facility Wins Design Award
    Hach Company Schneider Electric Neptune Technology Group Inc Evoqua Water Technologies Veolia Water Solutions Technologies ABB Measurement Products Aclara Jacobi Carbons Endress Hauser Inc KROHNE Inc Kaeser Compressors Inc Emerson Process Management Rosemount Analytical Degremont Technologies Brentwood Industries View All Providers News December 16 2015 Tucson s AOP Water Treatment Facility Wins Design Award Contact The Supplier Tucson Water s Advanced Oxidation Process AOP Water Treatment Facility was awarded the 2015 Grand Prize in Design from the American Academy of Environmental Engineers and Scientists AAEES As part of a commitment to provide safe reliable drinking water the city of Tucson Arizona completed the installation of a new Advanced Oxidation Process Water Treatment Facility in January 2014 The system uses 6 TrojanUVPhox units and supplies purified water to nearly 50 000 people The technology is treating groundwater contaminated with 1 4 dioxane and other volatile organic compounds VOCs which were used in aircraft manufacturing companies in the Tucson airport area from the 1940s to 1970s 1 4 dioxane is a contaminant not easily removed with conventional technologies but TrojanUV s oxidation systems destroy VOCs breaking them down into their harmless components almost instantly The process combines ultraviolet light with hydrogen peroxide to purify up to 8 million gallons of water a day The AAEES Award celebrates the best in environmental projects and programs The Academy states that the complexity of the design integration and implementation of the project was unprecedented in Arizona and that Transforming a significant groundwater quality problem into a high quality drinking water supply has provided several social and economic benefits to the community The new AOP facility restores the Tucson Airport Remediation Project TARP facilities to full effectiveness without compromising water quality commitments or requiring additional water supplies for blending SOURCE TrojanUV Like what you are reading

    Original URL path: http://www.wateronline.com/doc/tucson-s-aop-water-treatment-facility-wins-design-award-0001 (2016-02-14)
    Open archived version from archive

  • Kruger Supplies Water Treatment Technologies To West Deptford Energy Station To Support Environmentally Friendly And Sustainable Energy Operation
    Discfilter systems allowing effluent from a municipal wastewater plant to be recycled and reused with a treatment capacity of 7 35 MGD in the operation of their new green energy station The West Deptford Energy Station WDES a natural gas fired combined cycle electric generating facility generates about 738 megawatts of electricity estimated to power more than 700 000 homes in South Jersey and northern Delaware The facility sits adjacent to the Gloucester County Utilities Authority GCUA sewage treatment plant and uses treated effluent diverted from the GCUA river discharge for use in the energy station s non contact cooling tower makeup boiler feed water and plant service water Kruger s BIOSTYR BAF and Hydrotech Discfilter systems provide nitrification and filtration of secondary effluent received from the GCUA prior to use of the reclaimed water within the WDES The BIOSTYR process combines biological treatment clarification and filtration into one compact system removing ammonia and a majority of the wastewater solids The BIOSTYR effluent is then gravity fed into the discfilters which provide an ideal filtration system for fine solids removal thus producing much cleaner water needed for use in plant operations Kruger was honored to be chosen to execute the water reclamation process in the operation of West Deptford Energy s green energy station The use of recycled water is a win for the environment and for West Deptford Energy making their power station a model of highly efficient and sustainable energy generation further cementing their reputation as a leader in developing environmentally friendly energy solutions across North America About Veolia Veolia group is the global leader in optimized resource management With over 179 000 employees worldwide the Group designs and provides water waste and energy management solutions that contribute to the sustainable development of communities and industries Through its

    Original URL path: http://www.wateronline.com/doc/kruger-supplies-water-treatment-environmentally-friendly-sustainable-energy-operation-0001 (2016-02-14)
    Open archived version from archive

  • Bacterial Battery Fuels Recovery Of Valuable Commodities From Wastewater
    aquatic ecosystems In agricultural states like Virginia where farm runoff and animal manure already flood waterways with ammonia and fragile ecosystems like the Chesapeake Bay minimizing ammonia pollution in wastewater while satisfying agricultural demand answers two challenges We use so much energy to convert nitrogen gas into fertilizer and then in wastewater treatment we consume a lot of energy to convert ammonia into nitrogen gas said Jason He an associate professor of civil and environmental engineering in the College of Engineering A system that recovered the ammonia for later use instead of just removing it would be of great interest to sustainable wastewater treatment Mohan Qin a second year doctoral student in He s lab has built a system that recovers ammonia and removes other contaminants while generating electricity at the same time The key is combining two existing technologies a microbial electrochemical cell in which bacteria carry out electron shuttling chemical reactions and a forward osmosis cell which uses a highly concentrated solution to draw clean water through a membrane leaving impurities behind It s a hybrid system Qin said We combine the two cells to get ammonia clean water and electricity from wastewater Bacteria are naturally present in wastewater and already carry out electrochemical reactions as part of their metabolism In an engineered system like the microbial electrochemical cell these reactions generate electricity The electricity drives ammonium ions present in the wastewater to the other side of the cell creating an ammonia rich solution This concentrated solution is transferred to the attached forward osmosis cell where it draws wastewater through a membrane the same way that salt draws water out of food Organic contaminants are left behind and the ammonia can be easily removed and stored leaving clean water The electrochemical cell also allows the electricity generated by the microbes to be harvested directly what Qin calls a bacterial battery While many wastewater treatment plants produce biogas that could be converted to electricity the costs of running and maintaining the generator are high Qin s system bypasses the need for storing and burning biogas This is the first time that ammonia driven forward osmosis has been combined with an ammonia generating microbial electrochemical cell Qin said The idea earned Qin who is from Shandong Province China the 2015 Innovation Award for Best Technological Advancement from the International Society for Microbial Electrochemistry and Technology With her bench scale system up and running Qin is working on computer modeling studies to explain why the system works so well and determine what factors might improve its performance Meanwhile He is pursuing opportunities to build a pilot scale model of the combined microbial electrochemical and forward osmosis cells working with local water treatment plants to establish a research facility It s really hard to study a large scale system in the lab He said You can build it but you can t run it there s no wastewater You need a place that can continuously supply wastewater Another microbial fuel cell system

    Original URL path: http://www.wateronline.com/doc/bacterial-battery-fuels-recovery-of-valuable-commodities-from-wastewater-0001 (2016-02-14)
    Open archived version from archive

  • Wastewater Contaminant Removal News Documents on Water Online
    Inc PWT was awarded a key contract valued at about 700 000 for upgrading and expanding a large boiler feedwater treatment system at a power plant in the Northeast Desalitech Provides ZLD Solution For Manufacturing Application In China 2 9 2016 Desalitech announced recently that it was awarded a contract by Novelis the world leader in rolled aluminum products to supply a high efficiency ultrapure water treatment system for a production facility in Changzhou China to help comply with a local ordinance requiring zero liquid discharge ZLD for applicable process wastewaters Sorbwater Pilot Program Is Underway In Middle East To Test Produced Water Treatment Technology 2 9 2016 Sorbwater Technology AS a Norway based company that has developed a patented technology capable of cleaning oil and other substances from water announced that it has completed its first deliveries and is now engaged in a pilot project in the Middle East to clean produced water without any discharge and recover fresh water for reuse BCR Environmental Corporation President And CEO Aaron Zahn Receives Governor s Business Ambassador Award From Florida Governor Rick Scott 2 9 2016 BCR Environmental Corporation BCR a proven innovator of technologies for the advanced treatment and conversion of wastewater and organic waste recently announced that President and CEO Aaron Zahn was awarded the Governor s Business Ambassador Award by Florida Governor Rick Scott at Connect Florida s Day the Capital 2016 event sponsored by Connect Florida QUA Wins Contract To Supply FEDI Fractional Electrodeonization Technology For Water Treatment Plant At Cheniere Energy s Sabine Pass LNG Terminal 2 9 2016 QUA has been awarded a contract to supply its FEDI Fractional Electrodeionization technology for the RO permeate polishing demineralizing process to support Cheniere Energy s addition of liquefaction services to its Sabine Pass LNG Terminal Hager Elsaesser

    Original URL path: http://www.wateronline.com/hub/bucket/wastewater-contaminant-removal-news (2016-02-14)
    Open archived version from archive

  • Overcoming UV Obstacles
    entitled A Large UV System in Action for Secondary Effluent Disinfection during WEFTEC 2015 The session and its accompanying paper co authored by Leng Frankenburg and MSD s Becca Coyle reflects the abundant operation knowledge that was collected under varying flow and water quality conditions for two full disinfection seasons at MSD s Lemay Wastewater Treatment Plant WWTP Challenge 1 Controlling Flow to the UV System The Lemay WWTP has a system design that splits the incoming flow into two paths one system disinfects secondary effluent via UV disinfection while the other system using an existing conduit the wet weather system commissioned in August of 2010 disinfects via chlorination dechlorination A junction chamber equipped with gates splits wet weather flow to the two disinfection systems A nine foot gate connected to a distributed control system DCS is used by operators to manage incoming flow but such a large gate can be a crude means of flow control at least without supporting instrumentation and mismanaged flow will ultimately overburden the UV system The lesson for Lemay was that more precise flow control was needed New gate actuators with reduced deadbands were installed and the plant used a combination of flow control and level control instruments to help ensure that the UV system was never again hit with more than its designed flow capacity of 240 MGD Challenge 2 Battling Regrowth for Compliance At the Lemay facility the UV treated effluent is combined with the effluent treated in the wet weather system by sodium hypochlorite before discharge Because E coli counts for regulatory compliance are taken from the combined effluent wet weather system issues become whole plant issues In this case stagnant wet weather effluent led to regrowth in the conduit The DCS system was not set to pump out the effluent until 24 hours an event After discovering a high E coli count from a grab sample the plant changed the DCS setting for pumping out remaining effluent to one hour after an event That specific cause and resolution aside the experience raised the specter of not being able to pinpoint the cause of high E coli when effluent from multiple treatment schemes is combined before outfall Since then MSD added sampling points throughout the plant to more capably troubleshoot problems as they arise with samples now taken at exit of each UV channel to monitor its true performance Challenge 3 Keeping the UV System Clean As with all UV systems the pathogens in the water must be sufficiently exposed to the UV light in order to be inactivated Dirty equipment will inhibit this process so it s imperative to perform regular effective cleanings and maintain fix equipment that could foul the UV system particularly the quartz sleeves At Lemay rags and debris would often bind to the sleeves mechanical wipers resulting in frequent maintenance More chemical cleans were needed as well further burdening the staff There were other issues as well The citric acid dip tanks had uneven bottoms causing

    Original URL path: http://www.wateronline.com/doc/overcoming-uv-obstacles-0001 (2016-02-14)
    Open archived version from archive



  •