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Showing 1 to 16 of 16 for “"IFAS"”.
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Computer Program Development for the Design of IFAS Wastewater Treatment Processes
The Integrated Film Activated Sludge Process (IFAS) was developed to reduce the cost of additional facilities required to complete year round nitrification in the design of new or retrofit wastewater treatment plants. The purpose of this project was to develop a computer-based mechanistic model, …
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Evaluation Of Nitrification Kinetics For A 2.0 MGD IFAS Process Demonstration
… a 2 MGD Integrated Fixed Film Activated Sludge (IFAS) demonstration process from November 2007 to April 2009 to explore IFAS performance and investigate IFAS technology as an option for a full scale plant upgrade in response to stricter nutrient discharge limits in the James River Basin. During …
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Startup and Pilot Testing of MBBR and IFAS Partial Denitrification/Anammox Processes
… PdNA integrated fixed-film activated sludge (IFAS) reactor was also operated to determine the carbon demand and nitrogen removal capabilities for a PdNA process in an IFAS reactor. The PdNA and AMX MBBRs had average effluent TIN concentrations of 3.75 ± 1.25 and 2.81 ± 1.21 mg TIN/L, …
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Mathematical Modeling and Evaluation of Ifas Wastewater Treatment Processes for Biological Nitrogen and Phosphorus Removal
… called Integrated Fixed Film Activated Sludge (IFAS) has recently become popular for enhanced nitrification and denitrification in aerobic zones because it is an alternative to increasing the volume of treatment plant units to accomplish year round nitrification and nitrogen removal. Biomass is …
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Utilization of fixed film media in BNR activated sludge systems
… as the Integrated Fixed Film Activated Sludge (IFAS) systems. A fourth treatment train (Control train) was operated without any fixed film media. All experiments in this research were performed using domestic wastewater from Blacksburg, Virginia, and the Virginia Tech campus. Enhanced …
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Design of an integrated fixed-film activated sludge (IFAS) system for possible application at the Borcherds Quarry WWTW
… Integrated Fixed-Film Activated Sludge (IFAS) systems have been used extensively in European and Scandinavian countries. This process entails the addition of moving-bed biofilm carriers in certain zones of an activated sludge system to establish biofilm growth. The most successful …
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Cod removal, nitrification and denitrification kinetics and mathematical modeling of an integrated fixed film activated sludge (IFAS) system
… scale conditions in a bench scale system, the IFAS-Sponge system was selected for kinetic coefficient evaluation and IF AS system model development.
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The Effects of Calcium Hydroxide Treatment of Sunflower Seeds on Ration Digestibility and Rumen Parameters in Holstein Steers
… an increase in insoluble· fatty acid soaps (IFAS) i~ RFDM, but additional calcium did not result in a further increase in IFAS. This indicated sufficient calcium was present to form IFAS to the maximum extent possible given the conditions of this study. Compared to limestone, calcium …
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Effects of Integrated Fixed Film Activated Sludge on nitrogen removal in biological nutrient removal systems
… of Integrated Fixed Film Activated Sludge (IFAS) was evaluated for its effect on nitrification and denitrification in a bench scale biological nutrient removal (BNR) process configured as a Virginia Initiative Project (VIP) process. The IFAS systems consisted of a sponge - like biomass …
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The risk management within European equity asset managers
… hedge funds and Intermediate Financial Advisors (IFAs in UK) are willing to accept, and 5) Conclusions. This will cover the financial crisis and the on-going subsequent recovery. The key findings from Chapter 2 are that there is limited literature in this subject, from Chapter 3 that there is …
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Riding Bicycles When We Need Cars: The Development Of Transnational Union Networks In Brazil
… cases, sign International Framework Agreements (IFAs) or engage in transnational social dialogue with employers. Unions have increasingly turned to transnational networking as a strategy to increase their bargaining power and combat the negative effects of neoliberal globalization. This …
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Startup Strategies for Mainstream Anammox in Moving Bed Biofilm Reactors (MBBRs)
… In one experiment, an MBBR was started using IFAS carriers with a preliminary biofilm and no external carbon dosing or AMX biomass inoculation. The feed was controlled to 20°C and included mainstream conditions of nitrite and ammonia controlled to the stoichiometric requirements for AMX …
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Improving settleability and achieving biological phosphorus removal through the application of sidestream gravimetric selectors
… a 4-stage Bardenpho configuration with an IFAS system. This plant routinely experienced moderate settleability issues with an average SVI of 141 and a 90th percentile SVI of 179. Over time data was collected to characterize settleability and activity of PAO, GAO, and filaments. Using an …
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THE EFFECT OF BIOFILM CARRIER LENGTH ON NITRIFICATION IN MOVING BED BIOFILM REACTORS: AN EXAMINATION OF MIXING INTENSITY, SHOCK LOADINGS, AND PH CHANGES
… as in integrated fixed film activated sludg (IFAS) and moving bed bioreactors (MBBRs) are commonly used in wastewater treatment, but little is known about how media geometry affects the biofilms and process performance. The objective of this study was to compare nitrification and growth of …
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Intensification of Biological Nutrient Removal Processes
… a mature integrated fixed film activated sludge (IFAS) process resulted in at least five times greater anammox activity rates in one month than virgin media without a preliminary biofilm. This concept has not been testing yet in a full-scale startup, but has the potential to drastically reduce …
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Assessment of a Fixed Media Partial Denitrification/Anammox Process Startup in a Full-Scale Treatment Train
Partial denitrification anammox (PdNA) is an emerging wastewater treatment technology with the potential to increase process capacity and save on energy and carbon. PdNA circumvents potential issues with stability of the more familiar mainstream partial nitritation anammox (PNA) process. The PdNA …