submerged aeration system Articles

  • The use of bottle caps as submerged aerated filter medium

    In this study, a submerged aerated filter (SAF) using bottle caps as a support medium was evaluated. The system was fed with effluent from an upflow anaerobic sludge blanket system at ETE 2-South wastewater treatment plant, under different volumetric organic load rates (VOLRs). The population of a particular nitrifying microbial community was assessed by fluorescent in situ hybridization ...


    By IWA Publishing

  • Textile effluent treatment in a UASB reactor followed by submerged aerated biofiltration

    An upflow anaerobic sludge bed (UASB)-submerged aerated biofilter (SAB) system that treats effluents from a jeans factory was evaluated. The 210-day operational period was divided into three phases (PI, PII and PIII), each with a different hydraulic retention time (HRT in h) and organic loading rate (OLR in kg COD/m3.d). In PI, the best performance was achieved using the UASB (HRT 24, OLR 1.3) ...


    By IWA Publishing

  • Influence of organic loading on nitrogen removal in a partially aerated submerged filter

    Influence of organic loading on simultaneous removal of organic carbon and nitrogen was investigated in a partially aerated submerged filter. This study indicates that high removal rates of organic carbon and nitrogen can be achieved in a single reactor. Organic loading had significant influence on nitrogen removal. Increase in COD loading promoted microanoxic conditions established within ...


    By Inderscience Publishers

  • The climb to the top

    Back in the late 1980’s when market drivers created the cost-effective option of using above-ground circular tanks for industrial activated sludge processes, there were some early valuable lessons for both aeration equipment manufacturers and plant operators. As production plants got away from in-ground basins, one of the more simple innate operational checks became more challenging; ...


    By KLa Systems, Inc.

  • Effect of organic loading on the performance of aerated submerged fixed-film reactor (asffr) for crude oil-containing wastewater treatment

    A large amount of water is used in oil industry for a wide variety of purposes and basic portion of it leaves this industry as wastewater containing oil, phenols, different solvents, and toxic substances  (Zhao, et al., 2006; Toril, 2001). Such wastewater can pollute water bodies, soil, and even the air if it is not treated (Yang, 2000; Chen, 2002; Vegueria, 2002). Biological treatment processes ...


    By University of Tehran

  • A Submerged Attached Growth Bioreactor for Decentralized Wastewater Treatment

    ABSTRACTThe Amphidrome® process is a submerged attached growth bioreactor (SAGB) that has been used in Massachusetts, Connecticut, Rhode Island and New Jersey for decentralized wastewater treatment systems ranging in size from 440 gpd to 150,000 gpd. The two primary advantages of a SAGB are the small volume requirement and the elimination of downstream clarification. Five years of data from four ...

  • A venturi device reduces membrane fouling in a submerged membrane bioreactor

    In this study, for the first time, a venturi device was integrated into a submerged membrane bioreactor (MBR) to improve membrane surface cleaning and bioreactor oxygenation. The performances of a blower and the venturi device were compared in terms of membrane fouling and bioreactor oxygenation. Upon comparing membrane fouling, the performances were similar for a low operation flux (18 ...


    By IWA Publishing

  • Dynamic Mathematical Modeling of Membrane Fouling in Submerged Membrane Bioreactors

    ABSTRACTA mathematical model is developed that accounts for internal fouling of membranes due to soluble microbial products during subcritical flux operation, and for supercritical flux fouling due to cake formation and compression.. The model takes into account the filtration effect generated by the cake. A set of differential equations is derived and solved numerically to obtain a description ...

  • Alternative energy efficient membrane bioreactor using reciprocating submerged membrane

    A novel membrane bioreactor (MBR) pilot system, using membrane reciprocation instead of air scouring, was operated at constant high flux and daily fluctuating flux to demonstrate its application under peak and diurnal flow conditions. Low and stable transmembrane pressure was achieved at 40 l/m2/h (LMH) by use of repetitive membrane reciprocation. The results reveal that the inertial forces ...


    By IWA Publishing

  • Temporary treatment systems for large construction site in Stratford, East London

    Filter refurbishment program for 2000 site workers/staff Site Contractor: Natta Building Company Peak flow to treatment: 10.5l/s Designed consent standard: 20 mg/l BOD, 30 mg/l TSS & 10 mg/l NH4 Maximum incoming BOD: 380 mg/l Maximum incoming NH4: 50 mg/l Units supplied: 4 off 300pe GRP units 1 off 750pe steel unit 2 off HB50 Lamella settling tanks (primary and ...


    By WPL Ltd

  • Temporary treatment systems for large construction site in Stratford, East London case study

    Posted March 2009 by WPL Limited Filter refurbishment program for 2000 site workers/staff Site Contractor: Natta Building Company Peak flow to treatment: 10.5l/s Designed consent standard: 20 mg/l BOD, 30 mg/l TSS & 10 mg/l NH4 Maximum incoming BOD: 380 mg/l Maximum incoming NH4: 50 mg/l Units supplied: 4 off 300pe GRP ...


    By WPL Ltd

  • 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

  • Analysis of monitoring results of the separation and greywater treatment system at Chester Woods Park, Olmsted County, Minn.

    Introduction In 1993, Olmsted County installed an advanced individual sewage treatment system (ISTS) at the caretaker's residence at a County-owned park to demonstrate waste load reduction and downsizing of drainfield area. The subject system has two components--1) a composting/vermiculture blackwater system and a 2) aerobic graywater treatment system. The separation of the high strength ...


    By Equaris Corporation

  • European processor eliminates maintenance headaches

    Problem Wastewater treatment became a huge headache for this large, European sugar processing company. The plant had installed many different types of aeration equipment in its activated sludge, aerated lagoon system. The company was dedicated to meeting all the environmental standards for its country. In their quest to find the best equipment, they had tried ...

  • Post Lagoon Nitrification in Cold Climates

    A Submerged Attached Growth Reactor (SAGR) Demonstration Site has been in operation following a primary aerated lagoon in Steinbach, MB since August 2007. This system provides nitrification, with influent winter water temperatures (post lagoon) below 0.5 degrees Celsius. The performance objective of the system was to achieve effluent cBOD5 and TSS levels of less than 10 mg/L, and ammonia of less ...


    By Nelson Environmental Inc.

  • Chemical wastewater treatment applying a membrane bioreactor (MBR)

    IntroductionAt the current time Membrane Bioreactors (MBR) are the primary focus of wastewater treatment technologies. MBR is a combination of biological activated sludge process for the removal of nutrients and a membrane filtration for separation of biomass and treated water. In industrial wastewater treatment MBRs have proven to be a particularly reliable technique [Cornel et al., 2006]. The ...


    By MICRODYN-NADIR GmbH

  • A realistic dynamic blower energy consumption model for wastewater applications

    At wastewater treatment plants (WWTPs) aeration is the largest energy consumer. This high energy consumption requires an accurate assessment in view of plant optimization. Despite the ever increasing detail in process models, models for energy production still lack detail to enable a global optimization of WWTPs. A new dynamic model for a more accurate prediction of aeration energy costs in ...


    By IWA Publishing

  • Case study - Pure oxygen injection pilot test

    Introduction: The Moccasin Bend WWTP uses pure oxygen produced by a cryogenic oxygen plant for activated sludge treatment of the influent waste stream, which consists of municipal and industrial wastes. The waste stream contains a high proportion of high strength industrial waste, which results in a typical COD loading of about 2000 mg/L, which is approximately four times the strength ...

  • Fixed activated sludge treatment (FAST®) process technology overview

    Biological treatment systems for small communities and even single-family dwellings have been available in the general water pollution control market for many years. These systems are basically scaled-down versions of the activated sludge process, utilizing suspended growth systems. Historically, the main operational problem associated with these systems has been the management of the sludge ...


    By Bio-Microbics, Inc.

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