Air & Climate Articles

  • The intermediate thermal hydrolysis process: results from pilot testing and techno-economic assessment

    Thermal hydrolysis has proven to be an efficient pre-treatment process for sludge before anaerobic digestion (AD), by thermally enhancing organic matter hydrolysis. Recent research has shown that a new configuration with the existing technology can further enhance the efficiency of the system. The intermediate thermal hydrolysis process (ITHP) has been explored and tested in the Sludge and ...


    By IWA Publishing

  • The role of Greater Copenhagen Utility in implementing the city's Cloudburst Management Plan

    This paper describes Greater Copenhagen Utility's role in planning, coordinating and implementing Copenhagen's Climate Change Adaptation Plan and Cloudburst management strategy. Detailed hydraulic modelling of the seven catchments in the city resulted in the preparation of a cloudburst management plan with more than 350 interventions, at a budget of EUR 1.3 billion. Among the planned projects ...


    By IWA Publishing

  • Clays for heterogeneous photocatalytic decolorization of wastewaters contaminated with synthetic dyes: a review

    Photocatalysis is one of the most environment-friendly and technologically viable advanced oxidation processes. Compared to conventional thermal, biological, and physicochemical treatments, photocatalytic processes have more moderate reaction conditions and higher efficiency. They are a promising technology for the treatment of dye wastewaters, particularly those that have toxic and high ...


    By IWA Publishing

  • Wastewater treatment facility upgrade uses combination of technologies to solve nutrient removal challenges

    New regulations required the 7.5 ML/d North East River Advanced Wastewater Treatment Facility to upgrade to meet lower annual average effluent nitrogen and phosphorus limits. At the same time, facility planning was underway to expand the facility to 17.0 ML/d to accommodate planned growth in the service area. Following a pilot study to establish the performance capabilities of the existing ...


    By IWA Publishing

  • Dissolved air flotation (DAF) for biomass recovery from algal ponds

    This work evaluated the performance of a dissolved air flotation (DAF) system for biomass recovery from the effluent of algal ponds used for sewage treatment in Northeast Brazil. Two different coagulants and effluent samples were tested following a random-factor experimental design (34–1–4 factors and 3 levels), in triplicate. Factor analysis showed that coagulant dose was the most important ...


    By IWA Publishing

  • Feed Water Delivery System Audit Using 2 nd Gen eration ATP - Case Study

    Background A Western Canadian oil producer utilized LuminUltra's Quench-Gone Aqueous (QGA) test kit to perform an audit of its feed water delivery system. The site acquired water from underground brackish water wells and transported this water through a 5 kilometer pipeline to the site. Water was then stored in a large tank prior to being sent to the process. ...

  • Case study - CAIROX Potassium Permanganate

    BACKGROUND The Carbondale Water Treatment Plant (Carbondale, Illinois) with a design capacity of 8 MGD and an average flow of 4.6 MGD draws its water from Cedar Creek Lake. Because of moderately high raw water TOC levels (4.3 - 6.5 mg/L) and low alkalinity (36 - 40 mg/L as CaCO3), Carbondale is required to attain 45 percent TOC removal under the Disinfection/Disinfection By-Product ...


    By Carus Corporation

  • Case study - CAIROX CR potassium permanganate tablets

    PROBLEM Hydrogen sulfide (H2S) results from septic conditions during the collection and treatment of wastewater. H2S has long been recognized as a major problem for municipal wastewater systems. This colorless gas, known for its rotten egg smell, is produced by the biological reduction of sulfates and the decomposition of organic material. It forms at virtually every point in a system ...


    By Carus Corporation

  • Oxidative treatment of diclofenac via ferrate(VI) in aqueous media: effect of surfactant additives

    The potential reaction of diclofenac (DCF) with ferrate(VI) and influences of coexisting surfactants have not been investigated in depth, and are the focus of this study. The results demonstrated that DCF reacted effectively and rapidly with Fe(VI) and approximately 75% of DCF (0.03 mM) was removed by excess Fe(VI) (0.45 mM) within 10 min. All of the reactions followed pseudo first-order ...


    By IWA Publishing

  • Solar photodegradation of a textile azo dye using synthesized ZnO/Bentonite

    The present work is devoted to the synthesis of a new photocatalyst ZnO (7.5%)/Bentonite prepared by impregnation method and its successful application for the degradation of Solophenyl Red 3BL (SR 3BL) under solar light (∼660 W/m2). The X-ray diffraction (XRD) indicates mixed phases of the nanocomposite catalyst (ZnO/Bentonite), characterized by scanning electron microscopy, X-ray ...


    By IWA Publishing

  • Characterization of road runoff with regard to seasonal variations, particle size distribution and the correlation of fine particles and pollutants

    Urban runoff is known to transport a significant pollutant load consisting of e.g. heavy metals, salts and hydrocarbons. Interactions between solid and dissolved compounds, proper understanding of particle size distribution, dissolved pollutant fractions and seasonal variations is crucial for the selection and development of appropriate road runoff treatment devices. Road runoff at an arterial ...


    By IWA Publishing

  • Automated Oil Particle Analysis Helps Prevent Gearbox Failures

    The major issue for premature failure in wind turbine gearboxes is bearing failure, which leads to gearbox failure. A wind turbine gearbox will not survive if the oil is not clean and especially if the hard ferrous particles are not removed from ...


    By Spectro Scientific

  • December issue of Palas Particular available!

    Read more about newest innovations and developments Topics in this issue: Fidas Frog proves it worth at #MucOhneMief Green City e.V. used the particle measurement system to collect well-founded data Palas to expand product range for discharge systems for aerosol conditioning X-ray neutralizer XRC 049 ...


    By Palas GmbH

  • Physicochemical effect of activation temperature on the sorption properties of pine shell activated carbon

    Activated carbons produced from a variety of raw materials are normally selective towards a narrow range of pollutants present in wastewater. This study focuses on shifting the selectivity of activated carbon from inorganic to organic pollutants using activation temperature as a variable. The material produced from carbonization of pine shells substrate was activated at 250°C and 850°C. Both ...


    By IWA Publishing

  • Tobacco - British American Tobacco - Case Study

    British American Tobacco is very satisfied with our odour control solution, reducing the tobacco smell with at least 90%. Tobacco produces a very strong smell, likely leading to complaints. British American Tobacco (BAT) carried out pilot tests at their factory in Serbia to determine the level of odour destruction of the Aerox-Injector. The outstanding ...


    By Aerox B.V.

  • Aqua feed - CP Namnoi - Case Study

    CP Namnoi in Thailand installed two compact Aerox-Injectors to treat the odours coming from four aqua feed production lines. CP Namnoi is the largest aqua feed company worldwide. They have many factories in many countries focusing on Asia. A shrimp feed factory in the south of Thailand produces shrimp feed on four production lines. ...


    By Aerox B.V.

  • Learn How to Better Balance Equipment Performance and Worker Safety with Our Latest Application Note

    Do you want to ensure the safety and health of the workers at your warehouse and maximize the performance of the equipment they use? Here at E Instruments, we know that having a successful, and fully-functioning warehouse is dependent on whether or not the equipment is being maximized, and if the workers are working in a healthy environment that encourages productivity. However, we also know all ...

  • Speaking the language of risk: climate change and the future of business

    In an increasingly carbon-constrained economy, it is clear that an organization’s environmental, social and financial performance is dependent on climate action. The development of a thorough and goal-oriented sustainability program, one that integrates climate change impacts into risk management and takes into account the key role of private and public stakeholders, is critical to ...


    By Bullfrog Power Inc.

  • Overview of Rotating Disc Electrode (RDE) Optical Emission Spectroscopy for In-Service Oil Analysis

    Introduction The basis of modern oil analysis is the use of optical emission spectroscopy (OES) to measure the ppm (parts per million) levels of wear metals, contaminants and additives in oil samples. Whatever else an oil lab may measure, a multi-elemental analysis is the core of in-service oil analysis. This paper gives an overview of Rotating Disc Electrode Elemental Spectroscopy and its ...


    By Spectro Scientific

  • London’s reliance on diesel triggers re-emergence of an old enemy: smog

    It’s Christmastime on Oxford Street. Brilliant displays of white lights rain from above. Decked-out shoppers dash from one gaudy sale to the next. And Johnny Conquest breathes in poison. “The air is horrible. The taxis stop right here, and when they take off, boom, you can taste it,” says the 67-year-old as the heavenly smell of the caramel peanuts he hawks from a humble street ...


    By Camfil Ltd

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