municipal wastewater treatment Articles
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MBR Operation
Although membrane bioreactor (MBR) technology has grown up to become a state-of-the-art in municipal wastewater treatment during the last decade, design, construction and operation of MBRs has not yet become a routine function. An insight into the practice of MBR technology will be available as a report at IWA Publishing by October 2010. ‘Operating Large-Scale Membrane ...
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The MIEX® Technology for Municipal Wastewater Treatment
The MIEX® Technology is designed for the removal of dissolved organic carbon (DOC). Until recently, the commercial application of the MIEX® Technology has been limited the treatment of potable water from surface or ground water bodies. The MIEX® Process is now being evaluated for application in municipal wastewater applications. An example of this is the use of the MIEX® Process for the ...
By Ixom
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CH#831 - Municipal Wastewater Treatment Plant
Introduction The Wastewater Treatment Plant is a rotating biological contactor treatment process preceded by bar screening, grit removal and primary settling. Subsequent to the secondary treatment process, the flow stream enters a chlorine contact tank and then goes to the receiving stream. The program study was started on March 4th. The objectives were a recovery from filamentous infestation, ...
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Nutrient Control Design Manual
The purpose of this EPA design manual is to provide updated, state‐of‐the‐technology design guidance on nitrogen and phosphorus control at municipal Wastewater Treatment Plants (WWTPs). Similar to previous EPA manuals, this manual contains extensive information on the principles of biological nutrient removal and chemical phosphorus removal to serve as the basis for design. A ...
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Reconsidering rotating biological contactors as an option for municipal wastewater treatment
There are many domestic wastewater treatment processes in use today. Generally, they are all biological systems and they may be broadly categorized as either fixed film processes or suspended growth processes. During the 1970s and early 1980s, the rotating biological contactor process (RBC), a particularly efficient fixed film process, became popular. However, the primary manufacturer of RBCs in ...
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Winning the War in Nutrient Removal: Case Study for SuperBiomedia in Trickling Filters
Biological nutrient removal (BNR) is necessary in the wastewater treatment process to protect local ecosystems after treated water is discharged. As the concentration of nutrients, namely nitrogen and phosphorus, increases in surface water, ecosystems are damaged in return. Algal blooms are a result of the increased nutrient concentration, which deplete dissolved oxygen, kill fish, and suffocate ...
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Advanced On-site Wastewater Treatment for Greenfield and Retrofit Applications
Many owners and operators of traditional decentralized municipal wastewater treatment plants, also referred to as on-site or off-grid treatment, are acutely aware their systems are at risk of becoming obsolete. These systems include septic fields, lagoons, oxidation ditches, ponds, rotating biological contactor (RBC) mechanisms, and sequencing batch reactor (SBR) processes. In this white paper, ...
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Treating Municipal Wastewater with the Goal of Resource Recovery. Water Science & Technology
Abstract: A new municipal wastewater treatment flowsheet was developed with the objectives of energy sustainability, and water and nutrient recovery. Energy is derived by shunting a large fraction of the organic carbon in the wastewater to an anaerobic digestion system. Aerobic and anaerobic membrane bioreactors play a key role in energy recovery. Phosphorus and nitrogen are removed from the ...
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Pharmaceutical Wastewater Treatment- An Application to Effective Treat Emerging Pharmaceutical Residues in Wastewater through GWT IWRS Process
Pharmaceutical Wastewater Treatment – An Application To Effectively Treat Emerging Pharmaceutical residues in wastewater through specialized electrocoagulation, advanced oxidation and biological processes. Pharmaceuticals have become one of the newly emerging contaminants found in water supplies across the USA and around the world. This is due to the fact that wastewater discharged from ...
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Low intensity ultrasound stimulates biological activity of aerobic activated sludge
This work aims to explore a procedure to improve biological wastewater treatment efficiency using low intensity ultrasound. The aerobic activated sludge from a municipal wastewater treatment plant was used as the experimental material. Oxygen uptake rate (OUR) of the activated sludge (AS) was determined to indicate the changes of AS activity stimulated by ultrasound at 35 kHz for 0–40 min with ...
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The ORP and pH profiles during simultaneous nitrification and denitrification of low carbon municipal wastewater
The ORP and pH profiles and the stability of Simultaneous Nitrification and Denitrification (SND) for low carbon municipal wastewater treatment were investigated under the different aeration modes in Sequencing Batch Reactor (SBR). The results showed that the 92% removal efficiency for TN, the smallest average level of ORP and both of the variation of ORP and pH values are achieved in ...
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Case Study: Wastewater Level Monitoring in SBR Tanks
Level sensors are critical in controlling sequencing batch reactor (SBR) systems, monitoring liquid levels in the basins and helping to control pumps that move wastewater through the system. A municipal wastewater treatment plant (WWTP) was experiencing issues with its existing level sensors. Due to a challenging environment, surface conditions and obstructions, the level sensors produced ...
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Extension of two large wastewater treatment plants in Stockholm using membrane technology
Like many other large cities, Stockholm is facing increased urbanization with densification of infrastructure as a result. At the same time, implementation of the Baltic Sea Action Plan and the EU Water Framework Directive is expected to result in more stringent effluent quality demands. The current situation gives rise to new challenges for the municipal wastewater treatment plants (WWTPs). ...
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Life cycle–based environmental assessment of municipal wastewater treatment plant in India
The environmental footprint of wastewater treatment plant (WWTP) can be assessed using a life cycle assessment (LCA) approach. Life cycle impacts are computed according to the CML 2 baseline 2000 methodology. An LCA study was carried out for WWTP treating municipal wastewater. Results show that the construction phase contributes to nearly 1% for the impacts when compared to overall life cycle ...
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Evaluating the application of Microbacterium sp. strain BR1 for the removal of sulfamethoxazole in full-scale membrane bioreactors
Microbacterium sp. strain BR1 is a bacterial strain that recently received attention for its capability to mineralize sulfamethoxazole (SMX) and other sulfonamides. In this study, the survival of Microbacterium sp. in municipal sludge waters was tested in batch experiments to explore optimal process conditions. Inoculation of Microbacterium sp. was subsequently performed in a pilot ...
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Model-based control structure design of a full-scale WWTP under the retrofitting process
The anoxic–oxic (A/O) municipal wastewater treatment plant (WWTP) of Manresa (Catalonia, Spain) was studied for a possible conversion to an anaerobic/anoxic/oxic (A2/O) configuration to promote enhanced biological phosphorus removal. The control structure had to be redesigned to satisfy the new necessity to control phosphorus concentration, besides ammonium and nitrate concentrations ...
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Real-Time Organic Loading Monitoring for Municipal Wastewater Treatment
Summary Operational decisions can be difficult to make when incoming wastewater quality fluctuates. Industrial manufacturers can discharge highly concentrated wastewater unexpectedly causing operational problems if not detected. Aside from potential operational problems, shock loading also has the potential to affect regulatory compliance if wastewater cannot be treated properly. Monitoring ...
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A concept for planning and management of on-site and centralised municipal wastewater treatment systems, a case study in Bangkok, Thailand. I: Pollutant discharge indicators and pollutant removal efficiency functions
The concept of pollution load indicators for planning and management of the mixture conditions of centralised and on-site wastewater treatment systems has not been discussed in detail so far. In this paper, pollutant discharge (load) indicators and pollutant removal efficiencies were quantitatively analysed to develop a part of a strategy for planning and management of municipal wastewater ...
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Effect of salinity variation on the autotrophic kinetics of the start-up of a membrane bioreactor and hybrid moving bed biofilm reactor-membrane bioreactor at low hydraulic retention time
A membrane bioreactor (MBR) and a hybrid moving bed biofilm reactor-membrane bioreactor (hybrid MBBR-MBR) for municipal wastewater treatment were studied to determine the effect of salinity on nitrogen removal and autotrophic kinetics. The biological systems were analyzed during the start-up phase with a hydraulic retention time (HRT) of 6 h, total biomass concentration of 2,500 mg L−1 in the ...
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Operating costs and energy demand of wastewater treatment plants in Austria: benchmarking results of the last 10 years
This work presents operating costs and energy consumption of Austrian municipal wastewater treatment plants (WWTPs) (≥10,000 PE-design capacity) that have been classified into different size groups. Different processes as well as cost elements are investigated and processes with high relevance regarding operating costs and energy consumption are identified. Furthermore, the work shows the ...
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