laboratory gas dosing Articles

  • Silver nanoparticle toxicity to Atlantic killifish (Fundulus heteroclitus) and Caenorhabditis elegans: A comparison of mesocosm, microcosm and conventional laboratory studies

    The use of silver nanoparticles in consumer products and industrial applications, as well as recent detection in waste streams, has created concern over potential impacts on aquatic ecosystems. The effect of complex environmental media on silver nanoparticle toxicity was investigated using wetland mesocosms and smaller scale microcosms. Mesocosms were dosed with 2.5 mg Ag/L as gum arabic (GA) ...


    By John Wiley & Sons, Ltd.

  • Use of anaerobic respirometers for measuring gas production in toxicity and treatability tests

    Introduction Anaerobic processes are used widely for stabilizing domestic sludges, treating industrial wastes, and converting biomass to methane. These processes frequently receive complex organic chemicals that are classified as being hazardous or toxic. Despite advances in our understanding of anaerobic reactions, there is limited information regarding the impact of toxic chemicals on the ...


    By Challenge Technology

  • Final report Experimental Study Investigating Risks of selected Amines (ExSIRA)

    Summary The effect of selected amines on the corrosion of carbon steel and copper was investigated in the laboratory and in the field. The steel and copper samples were exposed to loads of the amines in the laboratory, representing estimated 10 years worst case exposure due to emission from a CO2 capturing plant at the Technology Centre Mongstad (TCM). No effect on the corrosion rate for ...

  • Safety in handling wood pellets

    Canada is primarily a bulk producer and exporter of pellets with large mills that make, on average, 56,000 tonnes per year, said Staffan Melin. When shipped in large volumes, pellets are classified as hazardous material, although wood pellets in consumer bags are benign. For example, carbon monoxide (CO) gas emissions released by pellets killed a person in the cargo hold of a ship in 2002. A ...

  • Barium Sulfate: A Protocol for Determining Higher Site-Specific Barium Cleanup Levels

    Abstract Although different barium compounds are known to exhibit vastly different toxicities, cleanup standards for barium in soil or sediment at environmental corrective action sites are typically based on total barium concentration without regard for the specific barium compounds present. However, the Texas Commission on Environmental Quality (TCEQ) has recently agreed that the insoluble ...


  • Wastewater-Solids Dewatering Odor Control - Case Study

    Background The Milan Wastewater Treatment Plant, located just south of Moline, Illinois, is a 1.7 MGD (6,434 m3/day) activated sludge facility with an average wastewater flow of 700,000 gpd to 800,000 gpd. This facility dewaters primary sludge using a belt filter press (Figure 1). The press operates an average of three times per month, 8 hours per day at a pump rate of 100 gpm. The ...


    By Carus Corporation

  • Bakery Application - Case Study

    Introduction Clean Water Technology, Inc. is the creator of the Gas Energy System (GEM), the most advanced primary treatment system on the market. The GEM System provides superior reduction of total suspended solids (TSS), biological and chemical oxygen demand (BOD/COD), fats, oils and grease (FOG) and turbidity. Challenge A renowned Bakery and Savory manufacturer in Southern ...


    By Clean Water Technology, Inc.

  • Municipal waste water treatment plant case study

    A municipal WWTP in the North of England was experiencing significant problems with accumulations of FOG in the Wetwell at the head of the treatment plant. The FOG would form a solid cap over the well several feet thick. This put considerable strain on the pumping gear, interrupted the performance of the float switches and required regular manual intervention from the staff. High costs were also ...


    By Cleveland Biotech Ltd.

  • Bio-diesel Application - Case Study

    More than a decade of research and development by a network of soybean farmers, backed by an environmentally responsible food processor, a local soybean association and the formation of a farmer (majority) owned firm, resulted in the construction of a biodiesel facility in the central United States. Using soybean oil as its primary feedstock, the facility planned to produce 40 million gallons of ...


    By Clean Water Technology, Inc.

  • Assessing the Potential for Nitrification Inhibition at Wastewater Treatment Facilities as a Result of Zinc Othrophosphate Addition to Potable Water Distribution Systems

    ABSTRACTPortions of the greater metropolitan District of Columbia area have water distribution system corrosion problems. This has resulted in elevated levels of heavy metals, in particular lead from some plumbing and service connections. One alternative being considered for corrosion control is the addition of either phosphoric acid (ortho-phosphate) or zinc ortho-phosphate based products at the ...

  • Reliable silica monitoring supports power station efficiency

    West Burton B CCGT is a Combined Cycle Gas Turbine power station near Nottingham in the UK. It has three open-cycle gas turbines capable of generating enough electricity for approximately 1.5 million UK homes. In common with all combustion based power stations, the CCGT has a requirement to monitor silica levels in the Plant’s water and steam processes. Sean Todd, the Plant’s Control ...

  • BioLargo`s AOS Filter Wins `Technology Star Award` - New Technology Magazine -The First Word on Oil Patch Innovation

    Advanced disinfectant technology developer sets sights on oil and gas applications A small publicly-listed Santa Ana, Calif.–based company that is developing water purification and advanced disinfectant technologies, all using some form of iodine, sees one of its Edmonton-developed technologies as a way to clean up and even eliminate oilsands mining tailings ...


    By Biolargo, Inc.

  • Acid mine drainage treatment

    Acid mine/rock drainage is a rampant problem in the world today. The above photo depicts acid drainage at an abandoned mine in the Yukon Territory of northwest Canada. This mine shares a similar history to thousands of other mines throughout the world. It was in operation for six short years in the 1950’s, producing gold ore. Its profitability eventually failed and it was abandoned. In the ...


    By WesTech Engineering, Inc.

  • Reclaimed Municipal or Industrial Wastewater for Power Plant Cooling & Boiler Feed Make-Up Water

    For centuries, water was considered a commodity product and used with little or no restriction. In today’s modern society, water is now being considered a precious resource and considerable effort is put into protecting, recycling, and restricting its use freely. State and Federal agencies have put in place guidelines and regulations restricting its use, especially for industrial use. ...

  • Renewable energy marketplace

    ALLU Group markets two types of equipment for use in biomass energy operations. The ALLU Screener Crusher bucket attaches to a front-end loader. The bucket is designed to aerate, crush, screen and mix at one time. The Screener Crusher has a rigid steel frame, onto which horizontally rotating screening and crushing drums are mounted. All the drums rotate in the same direction. There are several ...


    By BioCycle Magazine

  • Sick-building syndrome and building-related illness

    Significant health problems linked to very poor indoor air qualityIndoor Air Quality (IAQ) deals with the content of interior air that could affect health and comfort of building occupants. The IAQ may be compromised by microbial contaminants (mold, bacteria), chemicals (such as carbon monoxide, radon), allergens, or any mass or energy stressor are more prevalent than anyone could have predicted. ...

  • Portable lead analyzer to locate source of lead

    OBJECTIVE: To investigate the sources of lead in the environment in children with elevated blood, with the help of a Field Portable X-Ray ...

  • Taming taste and odor (T & O) problems in a water treatment plant

    Taming Taste & Odor (T&O) Problems Some taste and odors are caused by mineral constituents in the water, e.g. excess chlorine and hydrogen sulfide. However the majority of taste and odor are the result of biologic activity. Spring turnover of lakes and algal blooms are responsible for Blue-green algae (Cyanobacterium), Green algae and diatoms that introduce filter clogging organisms ...


    By Jenfitch, LLC

  • Middle Eastern Cuisine - Case Study

    Introduction A major processor of hummus, salsas, salads and sauces had outgrown their original facility in central New York City and was expanding to a new location. The company, who takes great pride in their strong reputation for production of healthy food items, wanted their new facility to be state-of-the art, sustainable and expandable. Challenge When ...


    By Clean Water Technology, Inc.

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