fixed-film activated sludge Articles
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Application of cigarette filter rods as biofilm carrier in an integrated fixed-film activated sludge reactor
Bio-carriers are an important component of integrated fixed-film activated sludge (IFAS) processes. In this study, the capability of cigarette filter rods (CFRs) as a bio-carrier in IFAS processes was evaluated. Two similar laboratory-scale IFAS systems were operated over a 4-month period using Kaldnes-K3 and CFRs as IFAS media. The process performance was studied by using chemical oxygen ...
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Innbygda-Trysil Municipality (Ski Resort)
The municipality of Trysil is home to the largest ski resort in Scandanavia. Due to seasonal tourism in the region, the treatment plant must handle fluctuations in load depending on the number of tourists visiting at any given time. In addition, the plant had to have the ability to withstand extremely cold temperatures during the winter months. The existing wastewater treatment system was at ...
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Increase in sewage treatment performance with ENEXIO 2H BIOdek®-IFAS fills for activated sludge basins
Increase in output of up to 35 % in activated sludge basins Simple retrofitting during operation See 2H technology this year at IFAT in Munich The use of fills from ENEXIO Water Technologies GmbH (formerly GEA 2H Water Technologies) can increase the output of activated sludge basin by up to 35 %. ENEXIO 2H BIOdek® IFAS fills are designed for installation in new sewage treatments ...
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Impact of multiple wastewater feedings on the efficiency of nutrient removal in an IFAS-MBSBBR: number of feedings vs. efficiency of nutrient removal
This article presents the results of research into the influence of one, two and three wastewater feedings in a cycle on efficiency and performance of combined biological nitrogen and phosphorus removal in an integrated fixed-film activated sludge and moving-bed sequencing batch biofilm reactor (IFAS-MBSBBR). The experiment lasted 158 days and was conducted in two laboratory models of the ...
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Pilot scale studies on nitritation-anammox process for mainstream wastewater at low temperature
Process of partial nitritation-anammox for mainstream wastewater at low temperature was run in a pilot scale moving bed biofilm reactor (MBBR) system for about 300 days. The biofilm history in the reactor was about 3 years of growth at low temperature (down to 10 °C). The goal of the studies presented in this paper was to achieve effective partial nitritation-anammox process. Influence of ...
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Linking nitrification characteristic and microbial community structures in integrated fixed film activated sludge reactor by high-throughput sequencing
The primary goal of this study is to investigate ammonia removal, abundance of nitrifying bacteria and microbial community structures in a laboratory-scale integrated fixed film activated sludge (IFAS) reactor. The results of Illumina MiSeq sequencing based on 16S rRNA genes showed Proteobacteria and Bacteroidetes were the dominant phyla in both biofilm and suspended sludge samples in the ...
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Fate of selected pharmaceutically active compounds in the integrated fixed film activated sludge process
The potential for integrated fixed film activated sludge (IFAS) processes to achieve enhanced transformation of pharmaceuticals relative to conventional activated sludge (CAS) processes was assessed. Previous studies have focused on direct comparisons of parallel reactors with and without fixed film carriers and little information is available on the impacts of how varying operating ...
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Enhancing nitrogen removal efficiency and reducing nitrate liquor recirculation ratio by improving simultaneous nitrification and denitrification in integrated fixed-film activated sludge (IFAS) process
An integrated fixed-film activated sludge (IFAS) process (G1) and an activated sludge anoxic–oxic process (G2) were operated at nitrate liquor recirculation ratio (R) of 100, 200 and 300% to investigate the feasibility of enhancing nitrogen removal efficiency (RTN) and reducing R by improving simultaneous nitrification and denitrification (SND) in the IFAS process. The results showed that the ...
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Municipal: Harestua, Norway
Project Name: Harestua Wastewater Treatment Plant Location: Oppland County, Norway Type of Plant: Municipal - Retrofit Technology Used: Biowater CFAS Biomedia Used: Biowater BWT-X Operational Since: 2011 The Challenge The Harestua STP plant was a traditional Norwegian STP with headworks (screen and sandtrap), primary settling, chemical precipitation of phosphorous and a final clarifier. The ...
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Standard Process Industrial Case Study
The Standard Process company is a vitamin and food supplement manufacturer in business since 1929 located in an environmentally sensistive area called the Kettle Moraine basin. The basin is an area containing rare species with diverse habitats. The Standard Process company realizes this and has helped preserve this area with their organic farming techniques, waste reduction methods and now with ...
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Case study: Municipal WWTP
OverviewThe municipal WWTP at Monclova, Mexico had to increase its capacity by a factor of 1.5 and improve nitrification capacity, for 100% reuse by industry. RequirementsThe city of Monclova operates a modern wastewater treatment plant which receives urban and industrial wastewater. A retrofit for an increase of 50% in capacity was required, as well as improvement in effluent ammonia. The ...
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Efficiency of wastewater treatment in SBR and IFAS-MBSBBR systems in specified technological conditions
The objective of this study is to compare wastewater treatment effectiveness in sequencing batch reactor (SBR) and integrated fixed-film activated sludge–moving-bed sequencing batch biofilm reactor (IFAS-MBSBBR) systems in specific technological conditions. The comparison of these two technologies was based on the following assumptions, shared by both series, I and II: the reactor's active ...
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Environmental impact assessment of a package type IFAS reactor during construction and operational phases: a life cycle approach
In the present study, a life cycle assessment (LCA) approach was used to analyse the environmental impacts associated with the construction and operational phases of an integrated fixed-film activated sludge (IFAS) reactor treating municipal wastewater. This study was conducted within the boundaries of a research project that aimed to investigate the implementation related challenges of a ...
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Understanding the contribution of biofilm in an integrated fixed-film-activated sludge system (IFAS) designed for nitrogen removal
The objective of this study is to improve knowledge on the integrated fixed-film-activated sludge (IFAS) system designed for nitrogen removal. Biofilm growth and its contribution to nitrification were monitored under various operating conditions in a semi-industrial pilot-scale plant. Nitrification rates were observed in biofilms developed on free-floating media and in activated sludge operated ...
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WWTP Monclova, Mexico A Case Study
Case Study: Municipal WWTPClient: Monclova – MexicoStart Up: 2005Capacity: 58,300 m3/d Overview The municipal WWTP at Monclova, Mexico had to increase its capacity by a factor of 1.5 and improve nitrification capacity, for 100% reuse by industry. Requirements The city of Monclova operates a modern wastewater treatment plant which receives urban and industrial wastewater. A retrofit for an ...
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Validating the Colloid model to optimise the design and operation of both moving-bed biofilm reactor and integrated fixed-film activated sludge systems
The paper presents a systematic study of simulations, using a previously calibrated Colloid model, from which it was found that: (i) for pure moving-bed biofilm reactor (MBBR) processes with tertiary nitrification conditions (no influent chemical oxygen demand (COD)), dissolved oxygen = 5 mg/L and residual NH4-N > 4 mgN/L, a nitrification rate of 1.2 gN/(m2d) was obtained at 10 ...
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Industrial Palmyra, Wisconsin, US case study
Project Name: Standard Process WWTP Location: Palmyra, Wisconsin Type of Plant: Industrial - Food Processing Supplier: Environmental Health and Safety Products (EHS) Technology Used: Biowater (IFAS) CFAS Biomedia Used: BWT-X Operational Since: 2009 The Challenge The standard Process company is a vitamin and food supplement manufacturer in business since 1929 located in an environmentally ...
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Energy, cost and design aspects of coarse- and fine-bubble aeration systems in the MBBR IFAS process
With the MBBR IFAS (moving bed biofilm reactor integrated fixed-film activated sludge) process, the biomass required for biological wastewater treatment is either suspended or fixed on free-moving plastic carriers in the reactor. Coarse- or fine-bubble aeration systems are used in the MBBR IFAS process. In this study, the oxygen transfer efficiency (OTE) of a coarse-bubble aeration system was ...
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Environmental performance of an integrated fixed-film activated sludge (IFAS) reactor treating actual municipal wastewater during start-up phase
The present study summarizes the start-up performance and lessons learned during the start-up and optimization of a pilot-scale plant employing integrated fixed film activated sludge (IFAS) process treating actual municipal wastewater. A comprehensive start-up was tailored and implemented to cater for all the challenges and problems associated with start-up. After attaining desired suspended ...
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Nutrient removal performance and microbial characteristics of a full-scale IFAS-EBPR process treating municipal wastewater
This work describes the nutrient removal performance and microbial characteristics of a full-scale integrated fixed-film activated sludge-enhanced biological phosphorus removal (IFAS-EBPR) process for municipal wastewater treatment. The polymerase chain reaction-denaturing gradient gel electrophoresis results showed that the presence of bacteria in this process, including Nitrosomonas sp., ...
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