Air & Climate Articles

  • Quantification of leakage in batch biogas assays

    Avoiding leaks is essential for accurate measurement of biogas production by batch assays. Here we present a simple method for detecting leaks and correcting results, based on the change in bottle mass during incubation. Three experiments were carried out using pure chemicals, wastewater sludge, and other complex substrates to test and demonstrate the method, and leaks were detected in all ...


    By IWA Publishing

  • NEO Monitors conquers the Quasi-impossible

    China is a world factory powered by its abundant coal resource. China is facing a huge environmental challenge brought together with the fossil-fired power plants. China has therefore been conducting technical retrofit to the engines of its economy, by introducing emission control facilities. Selective Catalytic Reduction (SCR) technology is one of the most widely applied emission control ...


    By NEO Monitors AS

  • Monitoring for the golden balance

    On Herøya in Porsgrunn, Yara has an ammonia plant, three nitric acid plants and a calcium nitrate plant. Together the plants produce a wide range of fertilizers that meet the requirements for fertilization ...


    By NEO Monitors AS

  • Odour control: A successful experience in sorocaba city – Brazil

    Public concern over odours from sewage treatment facilities have been increasingly significantly in Brazil in recent years due to urban developments around existing plants or construction of new ones. The city of Sorocaba is an example where the expansion of the sewage collection and treatment system has increased and consequently more people have been exposed to bad odours. Due to this ...


    By IWA Publishing

  • Extended CSO control storage: what could possibly go wrong?

    The Thames Tideway Tunnel (TTT), is one of the main components of the London Tideway Improvements Programme, designed to capture combined sewer overflows (CSOs) which currently discharge untreated combined sewage into the tidal river Thames. CSO discharges would be stored in the tunnel until there is capacity at Beckton sewage treatment works (STW), to accept, for treatment, pumped sewage from ...


    By IWA Publishing

  • Critical pieces in a big puzzle

    Dynea is one of the world’s leading producers of adhesives for industrial use, particularly for the wood and paper industry, but also for rock wool and glass fibre products. The company has been an important ...


    By NEO Monitors AS

  • Eastney -  Horsham, West Sussex - Case Study

    Project summary: ERG was contracted by Southern Water to provide increased air extraction and upgraded odour control at the Eastney Headworks site in Portsmouth. Key project data: The upgrade works more than doubled the extracted air flowrate to the odour control unit from 20,700m3/hr to 48,500m3/hr was completed with live sewage flow ...

  • Chemical stress from Fe salts dosing on biological phosphorus and potassium behavior

    In simultaneous precipitation, interaction between chemical and biological P removal could not be ignored. This work investigated effects of ferrous sulfate and Fe precipitates on metabolic behavior of bio-P and its counter cation of potassium. After dosing, mixed liquid suspended solids (MLSS) increased 9%, pH decreased from 7.35 to 7.00, sludge volume index (SVI) decreased, electrical ...


    By IWA Publishing

  • Synthesis of ZnWO4/Ag3PO4 p–n heterojunction photocatalyst and enhanced visible-light photocatalytic applications

    The ZnWO4/Ag3PO4 nanocomposites synthesized by simple precipitation processes were characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM) and UV-vis diffuse reflectance spectra. The results indicated that the ZnWO4 nanorods dispersed well on ...


    By IWA Publishing

  • Case Study: Northern Sonoma County APCD Healdsburg, CA

    In 2009 when Air Quality Specialist George Erdman took over management of his air district’s four station monitoring network located north of the SF Bay Area in Sonoma County, it was clear the entire 35 year old network needed to be overhauled. Not only did equipment need replacing but the way in which data were collected, reviewed and reported needed modernizing as well. After extensive ...


    By Agilaire, LLC

  • The use of vertical flow constructed wetlands for the treatment of hyper-eutrophic water bodies with dense cyanobacterial blooms

    Eutrophication often leads to the periodic proliferation of harmful cyanobacterial blooms (HCBs), which threaten the sustainability of freshwater ecosystems and lead to serious environmental, health and economic damage. Hence, it is vitally important to take effective measures to manage HCBs and associated problems. In this study, vertical flow constructed wetlands (CWs) were operated under ...


    By IWA Publishing

  • Exhaust Products - Case Study

    Project Background High radiant heat emitted from the muffler shell can cause grass browning*, engine vapor lock**, fires and excessive bumper and shroud temperatures.  Muffler temperatures started increasing an engine OEM's created leaner burning engines to meet the EPA Tier 1 Regs issued back in 2001.  The engines continue to become increasingly leaner burning to meet Tier ...

  • Top 10 Industrial Odor Control Stories for 2017

    With 2017 already winding down, now is the ideal time to look back at the biggest industrial odor control stories for the year. From wastewater treatment to solid waste and beyond, eco-friendly odor management has become a priority for organizations looking to be good neighbors and keep their industrial processes fully optimized. Here’s a quick snapshot of the top industrial odor control ...


    By OMI Industries (OMI)

  • U.S. Air Force DOD Project - Case Study

    Environmental Issues Controlling the off-gas from a remediation project, where high concentrations of petroleum hydrocarbons are present, can be a difficult if not dangerous process when utilizing internal combustion engines and conventional oxidation technology. In more recent years, the use of high vacuum pumps to accomplish both liquid and gas phase extraction — ...

  • Plant reduces utility expenses with new emission control system - Case Study

    The steadily increasing natural gas prices near the end of 2004 were becoming a substantial operating cost burden on a facility producing automolive painl and coatings and developing coating products. The major consumers of natural gas at this facility were the main system of boilers which supplied steam energy throughout ihe facility and two Regenerative Thermal Oxidizers (RTOs) which controlled ...

  • An Introduction to Ventilation Butterfly Valve

    Overview: Ventilation butterfly valve is used in chemical industry, building materials, power plants, glass and other industries in the ventilation, environmental engineering dust or hot air gas pipeline. It acts as a gas medium to regulate and control the flow or shut-off in the pipes. ...


    By Adamant Valves

  • Plastic to crude oil process pyrolysis plant

    Plastic to crude oil process pyrolysis plant can convert the plastic waste to energy, such as plastic pyrolysis crude oil, carbon black and combustible gas. Those products are popular in the market, and they also have a great market value. Plastic to crude oil process pyrolysis plant 1.Put raw materials into ...

  • Cooking With Gas: Nitrogen, Food and You

    We’re big fans of food and we’re big fans of gas here at Analox (sometimes, depending on what we’ve eaten, the two aren’t mutually exclusive…) Today, we’re looking at how nitrogen can be used in the food and beverage industry – from factories, to restaurants to pubs… ...


    By Analox Sensor Technology

  • COOL AS ICE New Canadian-made technology reduces water usage to redefine green cleaning

    Water is one of the most essential human needs. Yet, for something so key to life, hundreds of millions of gallons of H2O are wasted each year on industrial cleaning applications. The ecological impact of this type of consumption is a real concern and has led to the development of an innovative cleaning technology that could potentially replace high-water usage cleaning methods, such as pressure ...


    By Coulson Ice Blast

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