activated sludge training Articles

  • Guidelines for using activated sludge models

    Mathematical modelling of activated sludge systems is used widely for plant design, optimisation, training, controller design and research. The quality of simulation studies varies depending on the project objectives, finances and expertise available. Consideration has to be given to the model accuracy and the amount of time required carrying out a simulation study to produce the desired ...


    By IWA Publishing

  • BM Respirometry benefits for activated sludge process management, research and training

    A biological process controlled by non-biological measurements? All treatment plant efficiencies are geared to the waste that they receive. The microorganisms found in the waste need food and oxygen to survive, the food is provided as soluble organic carbon in the waste stream and the oxygen is obtained through the aeration process in the treatment plant. Once a treatment plant ...


    By SURCIS, S.L.

  • Improving activated sludge classification based on imbalanced data

    A fast and accurate classification method for sewage sludge biological activity classification is of great significance for wastewater treatment. However, the data are often imbalanced and the accuracy of traditional classification algorithms applied to imbalanced small classes of data is very low. Such small classes are crucial application data. Therefore, based on the analysis of eight ...


    By IWA Publishing

  • Eight Years of Successful Cold Weather Nitrification with Integrated Fixed-Film/Activated Sludge

    In 1997 the North Buffalo Water Reclamation Facility in the City of Greensboro could not consistently meet their winter permit limit for ammonia-nitrogen. They decided to try a full scale demonstration of Integrated Fixed Film/Activated Sludge (IFAS) using a new fabric media called BioWeb. IFAS technology adds a high surface area synthetic media directly into the aeration basins of a conventional ...

  • A neural network approach for on-line fault detection of nitrogen sensors in alternated active sludge treatment plants

    In this paper, an effective strategy for fault detection of nitrogen sensors in alternated active sludge treatment plants is proposed and tested on a simulated set-up. It is based on two predictive neural networks, which are trained using a historical set of data collected during fault-free operation of a wastewater treatment plant and their ability to predict reduced (ammonium) and oxidized ...


    By IWA Publishing

  • Faecal sludge management - Malaysia Philippines

    1. Overview and key points Malaysia has been recognised to have adopted a good sanitation model through the use legislative reforms and implementation models. A firm set of guidelines along with clear knowledge on the role played by every stakeholder, especially that of developers whose responsibility it is to construct their own wastewater treatment, enabled an increase in sanitation coverage ...


    By IWA Publishing

  • A fuzzy rule–based approach for modelling effects of bench–scale microwave pre–treatment on solubilisation and anaerobic digestion of secondary sludge

    Fuzzy rule–based models were proposed in order to predict the effect of microwave pretreatment on the waste activated sludge (WAS) solubility and anaerobic digestibility or biogas production. The developed models were trained and validated using the experimental data from two separate multilevel factorial designs, containing 24 solubilisation and 54 biogas production runs from batch mesophilic ...


    By Inderscience Publishers

  • Full-scale experience with the deammonification process to treat high strength sludge water – a case study

    More stringent effluent criteria with regard to nitrogen calls for improved nutrient removal techniques in wastewater treatment plants (WWTPs). Besides optimisation of the liquid treatment train of the plants, attention has increasingly centred on the problem of return flows from sludge treatment. One of the most recent developments aimed at the reduction of this nitrogen load is deammonification ...


    By IWA Publishing

  • Acid resistance of methanogenic bacteria in a two-stage anaerobic process treating high concentration methanol wastewater

    In this study, the two-stage upflow anaerobic sludge blanket (UASB) system and batch experiments were employed to evaluate the performance of anaerobic digestion for the treatment of high concentration methanol wastewater. The acid resistance of granular sludge and methanogenic bacteria and their metabolizing activity were investigated. The results show that the pH of the first UASB changed from ...


    By Springer

  • BCTMP Mill effluent treatment plant

    Location: Slave Lake, Alberta Owner: Slave Lake Pulp Corporation Description: A greenfield 130,000 ADMT BCTMP mill using Aspen as wood furnish. The high strength effluent, with a BOD5 strength of up to 6,000 mg/L (35 t/d) and flow of 6,300 m3/d, is treated by a five day extended aeration activated sludge process. This represented the first ...


    By NovaTec Consultants Inc.

  • Full Scale Treatment of Slaughter House and Meat Packing Waste at Jennie-O Turkey Store, Barron, Wisconsin

    ABSTRACTJennie-O Turkey Store owns and operates a 0.057 m3/sec (1.3 MGD) treatment plant for treating wastewater from the slaughter of 26,000 turkeys per day. In 2000, Jennie-O Turkey Store was required by the Wisconsin Department of Natural Resources (WDNR) to remove phosphorous below 1 mg/l. The existing lagoon system with seepage cell was not removing phosphorous cost effectively and odors ...

  • Handeland wwtp - Norway case study

    Background The area of Oevre Sirdal is a rural area, characterized by a small residential population and a great seasonal tourist activity. New hotels and cabins are built, and the municipality expects an intensive growth in the tourist sector in the coming years. In order to meet the challenge from this extensive development, the municipality chose to build a new treatment plant for the whole ...


  • City of Johnstown, CO - case study

    The Overview Stricter regulations forced the town of Johnstown, Colorado to examine alternatives for an upgrade to their existing system. The Challenge Originally, the Johnstown site consisted of a series of three lagoons built in the 1950’s, with the most recent upgrade taking place in 1980. The city was faced with expanding their treatment capacity, along with meeting lower ammonia ...

  • side-by-side comparison of IFAS and CAS PROCESSES at demonstration scale at the lakeview WWTP

     ABSTRACT A full scale demonstration project of an Integrated Fixed Film Activated Sludge process (IFFAS) with floating biofilm carriers has been operating at the Lakeview wastewater treatment plant (Ontario, Canada) since the fall of 2003. In this study, 18 months of data collected on site from July 2005 to December 2006 are ...

  • Duffin Creek WPCP Evaluation of Biosolids Management Strategies

    The Duffin Creek Water Pollution Control Plant (WPCP) is a conventional activated sludge facility that provides treatment for wastewater from the Regional Municipality of York and Regional Municipality of Durham. The Duffin Creek WPCP has a rated capacity for an average day flow of 364,000 m3/d (80 MIGD). A number of previous studies at the facility have identified that the potential exists for ...


    By XCG Consultants Ltd.

  • 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

  • Impact of pre-treatment technologies on soil aquifer treatment

    This study investigates the impact of pre-treatment options on the performances of soil columns simulating soil aquifer treatment (SAT). For this purpose a conventional activated sludge (CAS) process, a membrane bioreactor (MBR) and vertical flow reed beds were used as single units or in combination before SAT. The influent and effluent from each treatment train were monitored over three ...


    By IWA Publishing

  • Class a biosolids production at eastern municipal water district using heat pasteurization

    Since 1998, the Eastern Municipal Water District (District) has developed and successfully operated a heat pasteurization facility to treat extended aeration waste activated sludge (WAS) from the Perris Valley Regional Water Reclamation Facility (PVRWRF). The treatment train uses hot water to sludge spiral heat exchangers and a patented continuous-feed, complete mix pasteurization vessel (heated ...


  • The Devil is in The Details: Full-Scale Optimization of the EBPR Process at the City of Las Vegas WPCF

    ABSTRACTTo optimize the enhanced biological phosphorus (P) removal (EBPR) at the City of Las Vegas’ Water Pollution Control Facility, the effects of dissolved oxygen (DO) level, hydraulic retention time in aeration basin and the operation mode of UCT versus A2O on phosphorus removal performance were investigated. DO levels in the range of 0.5 to 3.5 mg/L in the aeration basin did not have ...

  • Pure Oxygen Plus Nitrification? Biowin Modeling Plus Full-Scale Experience

    ABSTRACT High Purity Oxygen (HPO) activated sludge treatment and nitrogen removal do not have to be mutually exclusive. Some HPO activated sludge treatment facilities in relatively warm climates must address recently implemented or upcoming regulatory changes that require reduction of effluent nitrogen discharge levels. The 48.75 mgd capacity (annual average) Hollywood Southern Regional ...

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