aeration activator Articles

  • What are the parameters of an extended-aeration activated-sludge system?

    The activated sludge process is the most widely used biological water and wastewater treatment. As is well known, by its means, suspended-growth microorganisms are applied to breakdown wastes. Aeration, the mixing of air and a liquid, is the means used to speed the reactions involved. Aeration methods include spraying the liquid into the air; diffusing air into the liquid or agitating the liquid ...

  • Aeration upgrade

    The community of Moscow is located in the northeast corner of Pennsylvania, approximately 10 miles southeast of Scranton. The current WWTP consists of an activated sludge system with three oxidation ditches in parallel operation. The total volume of all three ditches is 0.372 million gal per day (mgd), while the average size of each ditch is 180 ft by 24 ft by 6 ft deep. Previously, two of the ...

  • Actively aerated methanobiofilters to control methane emissions from landfills

    Methane (CH4) capture at sanitary landfills for energy recovery is capable of reducing the impact of CH4 on the global atmospheric carbon budget. However, gas capture may only be viable where gas quantities are high enough to warrant economical energy production. Considering the potential global warming impacts, there is a need to ...


    By Inderscience Publishers

  • Floating Horizontal Aerators Enhance Eufaula, Alabama Activated Sludge Plant

    The Eufaula, Alabama, wastewater treatment plant (WWTP) is an extended aeration activated sludge facility designed for an average daily flow rate of 2.7 million gallons per day (mgd). Prior to February, 2005 this WWTP used vertical aerators to provide oxygen and mixing in its aerator basins. The plant has two aeration basins, each 1.87 million gallons in volume, which had 160 horsepower (hp) of ...


    By S&N Airoflo Inc.

  • Energy reduction in activated sludge - Case study

    Owner: Available by request. Contact Medora Corporation 866-437-8076 or info@medoraco.com System Overview: This is an activated sludge wastewater system that serves a city of approximately 16,000 residents. The North basin (see above photo) is the main reactor basin where aeration is supplied for mixing. The North basin covers 1.74 surface acres with an operating depth of 13.5 ft. The system ...


    By Medora Corporation

  • Achieve performance requirements by combining aeration with diffused aeration systems

    Aeration Industries International’s Aire-O2 Triton® can bring a struggling diffused air basin back up to speed quickly by adding oxygen capacity. Benefits of combining Aire-O2 Triton Aerators and Diffused Air Systems: Instant capacity (SOTR) increase without the need to interrupt production or drain the basin Increase aeration efficiency (SAE) with consistent ...

  • Long Term Full Scale Comparison of Activated Sludge (AS) With Biological Aerated Filter (BAF)

    The Wastewater Treatment Plant (WWTP) of Frederikshavn, Denmark, was extended in the early nineties to increase its average daily flow to 4,5 MGD (16,500 m³/d) and meet new requirements for nutrient removal (8 mg/l TN, 1,5 mg TP/l). A parallel biological aerated filter (BAF) was the selected as the most economical upgrade of the existing activated sludge plant (AS), and started up in 1995. ...

  • Development of a model for activated sludge aeration systems: linking air supply, distribution, and demand

    During the design of a water resource recovery facility, it is becoming industry practice to use simulation software to assist with process design. Aeration is one of the key components of the activated sludge process, and is one of the most important aspects of modelling wastewater treatment systems. However, aeration systems are typically not modelled in detail in most wastewater treatment ...


    By IWA Publishing

  • Dynamic changes of bacterial community in activated sludge with pressurized aeration in a sequencing batch reactor

    This study aimed to investigate the organic removal efficiency and microbial population dynamics in activated sludge with pressurized aeration. The activated sludge was fed with synthetic wastewater composed of simple carbon source to avoid the effect of complex components on microbial communities. The pressurized acclimation process was conducted in a bench-scale sequencing batch reactor ...


    By IWA Publishing

  • Lumpur Aktif (Activated Sludge)

    Lumpur aktif (activated sludge) merupakan campuran cair atau semicair dan partikel endapan lumpur dan tanah liat salah satu proses pengolahan air limbah secara biologi, proses pertumbuhan organisme yang berukuran sangat kecil yang biasa disebut mikroba tersuspensi dimana proses tersebut pada ...


    By Grinviro Biotekno Indonesia

  • Distribution and characterization of anammox in a swine wastewater activated sludge facility

    Anaerobic ammonium oxidation (anammox) is a novel biological nitrogen removal process that oxidizes NH4+ to N2 with NO2− as an electron acceptor. The purpose of this study was to examine the potential activity and characteristics of anammox in a conventional swine wastewater treatment facility, which uses an activated sludge system ...


    By IWA Publishing

  • Oxygen transfer in activated sludge – new insights and potentials for cost saving

    The α-factor has the greatest impact on the calculation of the required standard oxygen transfer rate (SOTR) in activated sludge systems equipped with submerged aeration systems. Knowing the dependencies of the α-factor leads to a better design of the aeration devices and, consequently, to a more efficient use of aeration energy. Applying the current state of knowledge about ...


    By IWA Publishing

  • Investigating the Fundimental Basis for Selectors to Improve Activated Sludge Settling

    ABSTRACTAerobic, anoxic, and anaerobic selectors have become popular for controlling filamentous bulking in activated sludge systems; however, selectors are not always successful. Regression analyses of data collected from 44 full-scale wastewater treatment plants, with operating selectors, provided criteria for determining when selectors will and will not be successful. Anoxic selectors do not ...

  • Achieving and maintaining of short-cut nitrification in a cyclic activated sludge system

    A lab-scale Cyclic Activated Sludge Technology (CAST) system was operated more than 5 months to evaluate the effects of the operation mode on nitrogen removal performance and investigate a feasible method for achieving short-cut nitrification in the system. Results showed that nitrogen was removed by conventional biological nitrification and denitrification in traditional operation mode ...


    By IWA Publishing

  • CH#824 - Steel Production - Activated Sludge

    BackgroundThe treatment plant at this Steel Mill treats approximately 0.3mgd waste from the coke and steel operations. Over the past year the treatment works improved performance and consistently produced a good quality effluent with respect to phenol, suspended solids, ammonia and cyanide. An improvement in performance was required to meet future discharge limits. To achieve this level of ...

  • Addressing digester foaming by fixing activated sludge system and gaining capacity in both

    The City of Richland Wastewater Treatment Facility digesters have experienced Nocardiainduced digester foaming problems from the time they went into operation in 1985. Because of the persistent foam, most or all of the thickened waste activated sludge (TWAS) was often not sent to the digesters but directly to the belt filter press to be dewatered separately from the digested sludge. It was ...

  • Determination of design criteria of an h-ifas reactor in comparison with an extended aeration activated sludge process

    The activated sludge process is a suspended culture system that has been in use since the early 1900s. The process derives its name from the fact that settled sludge containing living, or active, microorganisms is returned to the reactor to increase the available biomass and speed up the reactions. It may be either a completely mixed or plug flow process. The process is aerobic, with oxygen being ...


    By University of Tehran

  • Application of air stripping to powdered activated carbon adsorption of geosmin and 2-methylisoborneol

    Removal of odor-causing compounds (OCCs) including geosmin and 2-methylisoborneol (2-MIB), well known to cause the musty and earthy odor in drinking water, was investigated using powdered activated carbon (PAC) adsorption and air stripping processes. Removal by air stripping was mainly affected by aeration flow rates with volumetric mass-transfer rates of 0.002–0.005 min−1. Aeration also proved ...


    By IWA Publishing

  • Aerators Enhance Aerobic Digestion Process

    The city of Eden,N.C.,operates an extended aeration process designed for an average flow rate of 13.5 mgd with a mixed liquor suspended solids concentration that typically checks in about 6,000 mg/l. This high biomass concentration is necessary to provide a well-settling sludge and good effluent quality. Further, the plant influent is approximately 40% domestic wastewater and 60% industrial ...


    By S&N Airoflo Inc.

  • Complete solids retention activated sludge process

    In a slaughterhouse's full-scale extended aeration activated sludge wastewater treatment plant (WWTP), operating under complete solids retention time, the evolution of mixed liquor suspended solids (MLSS) and mixed liquor volatile suspended solids (MLVSS) concentration, food to micro-organisms ratio (F/M) and substrate utilization rate (SUR) were studied for over a year. Biomass growth phases ...


    By IWA Publishing

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