fine bubble diffuser Articles

  • Prairie farm rehabilitation administration paper

    The aeration efficiency of two types of aeration devices, air injection and mechanical surface aerators was evaluated in farm dugouts in the Peace River Region of Alberta. The air injection systems were tested using three types of diffusers; open-ended tubing, linear fine bubble diffusers and a membrane diffuser. Our results indicate that without aeration, anoxia can develop in the bottom of ...


    By EP Aeration

  • Reverse flexing as a physical/mechanical treatment to mitigate fouling of fine bubble diffusers

    Achieving energy neutrality has shifted focus towards aeration system optimization, due to the high energy consumption of aeration processes in modern advanced wastewater treatment plants. A study on fine bubble diffuser fouling and mitigation, quantified by dynamic wet pressure (DWP), oxygen transfer efficiency and alpha was carried out in Blue Plains, Washington, DC. Four polyurethane fine ...


    By IWA Publishing

  • Assessment of diffuser pressure loss on WWTPs in Baden-Württemberg

    Aeration of activated sludge is a critical treatment step for the operation of activated sludge plants. To achieve a cost effective treatment process, assessing and benchmarking of aeration system performance are important measures. A simple means of gauging the relative condition of a fine bubble diffused aeration system is to evaluate the pressure loss of the diffusers as oxygen transfer tests ...


    By IWA Publishing

  • Improving Efficiency and Reducing Energy and Maintenance Costs in Aeration Systems

    Energy costs for operating an aeration system in a biological wastewater treatment plant often times exceeds 75% of the total energy costs for the plant. Adding in blower and diffuser maintenance costs, Aeration Systems are easily the most costly portion of the treatment process, many times consuming so many resources that other parts of the plant may not be properly maintained or operated. By ...

  • Innovative system reduces ammonia at Hawick Sewage Treatment Works

    Hawick Treatment Works has reduced its ammonia discharge thanks to an innovative aeration system installed by market leaders Suprafilt. Aeration experts Suprafilt designed a highly efficient system using MF1100 plate diffusers, which increased the amount of oxygen to the site providing an instantaneous reduction in ammonia levels. The company, who are market leaders in designing and ...


    By Water Active Ltd

  • Benefits of Venturi Injection Versus Diffuser

    Over the last twenty years I have witnessed Ozone laundry companies come and go. I have witnessed outlandish claims from some of these companies, and quite frankly am tired of listening to the outright lies and fallacies that some of these companies are stating. I would like to look at some of the facts and hope to help our readers make an educated decision about ozone laundry. This month, ...

  • LINZ - ASTEN (Austria) Municipal WWTP - Case Study

    Number of Tanks: 8 Total Volume: 92,000 m³ Water Depth: 7.4 m SOTR Standard Oxygen Transfer Rate: 9,740 kgO2/h Total Airflow: 73,600 Nm3/h No. of AEROSTRIP® Diffusers: 3.328 Linz is the capital of Austrian federal state “Upper Austria” and third-largest city of Austria. It operates the second largest municipal WWTP of the country. In the year 2001 WWTP Linz-Asten has been ...


    By Aquaconsult Anlagenbau GmbH

  • Activated Sludge Diffusion Provides Cost Effective Biological Odor Control at Two Texas Wastewater Treatment Facilities

    ABSTRACTDuring recent expansions of the Rowlett Creek Regional WWTP in Plano, Texas and the Wilson Creek Regional WWTP in Lucas, Texas, activated sludge diffusion (ASD) biological odor control systems were installed to treat hydrogen sulfide (H2S) and other gaseous compounds. The ASD systems treat foul air collected from various sources, including headworks and primary distribution structures, ...

  • RUŽOMBEROK Industrial WWTP - Case Study

    Number of Tanks: 4 Total Volume: 10,000 m³ Water Depth: 4.0 m SOTR Standard Oxygen Transfer Rate: 5,095 kgO2/h Total Airflow: 61,680 Nm3/h No. of AEROSTRIP® Diffusers: 3,000 Ružomberok is a city in northern Slovakia with around 30,000 inhabitants. The local WWTP is built for 600,000 P.E. (BOD load; 700,000 P.E. hydr.). More than 95% of organic load comes from the local paper mill (Mondi ...


    By Aquaconsult Anlagenbau GmbH

  • BM respirometry study about nitrification inhibition and actual aeration capacity in an activated sludge process case study

    Study for municipal WWTP in Spain This study is ordered to SURCIS as a consequence of the low process performance, practical absence of nitrification treatment. By other side, the mixed-liquor presented some abnormal features such as weakness, dark colour and abundant white foaming. Data for study interest Aeration system: fine bubble diffusers + liquid oxygen injection Ammonium ...


    By SURCIS, S.L.

  • An assessment of oxygen transfer efficiency in a gas permeable hollow fibre membrane biological reactor

    The clean water oxygen transfer efficiency (OTE) of a full scale non-porous hollow fibre gas permeable (GP) membrane (surface area of 500 m2) was evaluated at inlet air pressures of 1.2, 1.4, and 1.8 atm using two established testing methods. To form a basis of comparison with traditional aeration technologies, additional testing was done with conventional aerators (fine bubble and coarse bubble ...


    By IWA Publishing

  • Surface Aeration or Diffused Aeration

    When designing lagoon aeration systems selection of optimum aeration components is critical to maximum performance, long-term operation and easy maintenance. Lagoon aeration is generally broken down into two major categories surface aeration and diffused aeration. Surface Aeration Lagoon aeration systems dating back to 1960’s were almost all surface aerators. Surface aerators are still ...

  • Energy-efficient wastewater treatment via the air-based, hybrid membrane biofilm reactor (hybrid MfBR)

    We used modeling to predict the energy and cost savings associated with the air-based, hybrid membrane-biofilm reactor (hybrid MfBR). This process is obtained by replacing fine-bubble diffusers in conventional activated sludge with air-supplying, hollow-fiber membrane modules. Evaluated processes included removal of chemical oxygen demand (COD), combined COD and total nitrogen (TN) removal, and ...


    By IWA Publishing

  • Full scale evaluation of diffuser ageing with clean water oxygen transfer tests

    Aeration is a crucial part of the biological wastewater treatment in activated sludge systems and the main energy user of WWTPs. Approximately 50 to 60% of the total energy consumption of a WWTP can be attributed to the aeration system. The performance of the aeration system, and in the case of fine bubble diffused aeration the diffuser performance, has a significant impact on the overall plant ...


    By IWA Publishing

  • Why does modern aeration technology make the treasurer happy?

    The aerzen combined system provides optimum efficiencies at the wallau wastewater treatment plant The combination of different technologies for air conveying enablesoptimal energy use of oxygen for biological degradation processes in wastewater treatment plants. Concrete savings resulting from the use of AERZEN machines demonstrate this in practice at the Wallau plant. In 2016, the ...


    By Aerzen USA Corporation

  • Modelling a full scale membrane bioreactor using Activated Sludge Model No.1: challenges and solutions

    A full-scale membrane bioreactor (1,600 m3 d−1) was monitored for modelling purposes during the summer of 2006. A complete calibration of the ASM1 model is presented, in which the key points were the wastewater characterisation, the oxygen transfer and the biomass kinetics. Total BOD tests were not able to correctly estimate the biodegradable fraction of the wastewater. Therefore the wastewater ...


    By IWA Publishing

  • Fixed vs. Moving Bed Systems: Aeration and Mixing Efficiency

    The aeration design for a biofilm system, such as moving bed or AccuFAS fixed-film systems, is more complex than a standard activated sludge system. In a biofilm system, the aeration design must satisfy the oxygen demand for required treatment, provide mixing, and control biofilm thickness. In an AccuFAS system, diffusers are installed beneath each media tower, forming an airlift pumping ...


    By Brentwood Industries, Inc.

  • Maximum Air Pressure for Diffusers

    In the water and wastewater treatment field there are many needs and/or opportunities to upgrade existing facilities or to construct new facilities where space is limited. The available space can severely constrict the capacity of treatment facilities, or reduce the options available for design and implementation of the treatment process. Some of the needs facing many potential facilities is the ...

  • IDEAL Lagoon Based Extended Aeration System with Batch Reactor Process Doubles Treatment Capacity at Grantsville WWTP

    Originally designed for a 0.75 MGD capacity, the Grantsville Wastewater Treatment Plant receives residential wastewater from almost 10,000 residents in Grantsville, Utah, just west of Salt Lake City. In 2009, the plant was having significant trouble meeting the city’s discharge requirements for ammonia, TSS, and BOD. According to Ron Griffin, the plant’s operator, treated wastewater ...

  • Domaine du Lac Cristal Campground, Quebec case study

    Located in the Centre-du-Québec region, the Domaine du Lac Cristal campground was founded in 1970. This family business attracts thousands of visitors each year. With its 540 sites based in an attractive setting (beach, lake, golf course, etc.), the natural environment remains an important aspect to protect. During the year of 2003, the consulting firm HBA Expert Conseil was mandated to ...


    By H2O Innovation

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