aeration basin Articles
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Columbus, Texas - Case Study
The Columbus WWTP was receiving an overload of grease from restaurants. Some of the grease was traveling only 150 yards before discharging directly into the WWTP. Because of the grease received at the plant, there was little settling occurring in the 30-minute settling tanks, despite personnel maintaining a low mixed liquor in the aeration basin. The plant was hauling off up to seven loads of ...
By BioCOPE Inc.
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Fixed vs. Moving Bed Systems: Basin Geometry
Aeration basins can have length to width (L:W) ratios varying from 1:1 (square) to over 30:1 (plug flow). The L:W ratio of an aeration basin directly impacts both the physical installation and biological performance of a submerged fixed-film system. Physical Installation Moving bed biomass carriers are free to move about the aeration basin. The aeration system provides energy to keep the ...
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Coldwater, Michigan - AccuFAS - Biological Treatment installations applications - Case Study
Application The wastewater treatment facility in Coldwater received tighter seasonal ammonia limits of 2 mg/L from May to November. Compounding this challenge, groundwater levels around the plant limited facility expansion and upstream industries caused organic shock. AccuFAS was selected as a retrofit solution for the existing solids contact aeration basins. The plant continues to consistently ...
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Fixed vs. Moving Bed Systems: Media Retention and Headloss
Submerged fixed-film media is utilized within aeration basins to optimize biological treatment and increase capacity. Therefore, proper design and installation of the equipment used to keep the media in the aeration basin and prevent it from passing downstream is critical to system function. Physical Restraint of Submerged Media Moving bed systems typically use submerged stainless steel ...
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Improving total nitrogen removal in aeration basin retrofitted with entrapped biomass
This study presented a method to upgrade existing aeration tanks to remove total nitrogen (TN). Bioplates carrying entrapped biomass were installed in an aeration basin to create anoxic/anaerobic zones where denitrification can proceed. In a reactor that coupled bioplates containing entrapped biomass (equivalent to as high as 7,500 mg/L of biomass) and an activated sludge suspension (at mixed ...
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Simple Aeration Header Cleaning System Allows A Food Processing Facility Get Back On Track
On the afternoon of May 19, 2011, KLa Systems was contracted by one of their customers located in Virginia. They stated that their aeration basin was running at nearly 0 mg/l dissolved oxygen (DO) residual with both blowers running at 100% capacity. Based on the conversation it was determined that a KLa field service technician was needed on site immediately. The following morning KLa personnel ...
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A pilot study on suspended activated sludge process augmented with immobilized biomass for simultaneous nitrification and denitrification
Concurrent nitrification and denitrification (CND) are natural phenomena in the soil environment that can be applied in wastewater treatment for enhanced total nitrogen removal. However, significant renovation is necessary for existing plants to equip them for nutrient removal. At a domestic wastewater treatment plant, we performed a pilot test by installing bioplates with entrapped biomass in ...
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Waterschap Brabantse Delta (NL) - Case Study
For two sewage treatment plants of Dutch water board “Brabantse Delta”, Landustrie supplies 3 no. brush aerators, also called aeration rotors. Unique here is the design of the aeration units. Normally the brush aerators are fixed mounted between the side walls of an aeration ...
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Activated sludge wastewater treatment plants optimisation to face pollution overloads during grape harvest periods
ABSTRACTThe principal objective of our study was to optimise a municipal activated sludge wastewater treatment plant (WWTP) to face high organic flows due to viticulture effluents inputs. Treatment file optimization consisted in testing different treatment lines, changing the number and volume of biological basins and clarifiers, with or without a buffer basin upstream, with a view to achieving a ...
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Increased plant efficiency, City of Checotah, Oklahoma
The City of Checotah, Oklahoma was experiencing excessive solids, foam and grease in their 0.5 MGD extended aeration activated sludge treatment facility. With a daily average flow of 0.25 million gallons per day, the plant had tremendous amounts of foam and grease in the aeration basin with the sidewalls caked with sludge. The centerwells of the clarifier were filled with foam and grease. The ...
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COVID19 Surge of Wipes at WWTP`s - OR-TEC has the Solution
Wastewater Treatment Plants have been struggling with wipes for a few years now but, facilities are seeing an increased number of disinfectant wipes, latex gloves and face masks being flushed down toilets, creating clogs, blockages, and other damage to critical infrastructure. These wipes do not disintegrate. De-ragging pumps, aerators, aeration basins and unclogging pipes is labor intensive and ...
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Wilsonville WWTP Biosolids - Case Study
About the Project The new facility includes two new structures: a dewatering and drying building, and a head works building. There are five additional major structures, including a new aeration basin, stabilization basin, clarifier, a bio-tower and ultraviolet light channel structure. All of these are used in the various stages of treating raw sewage before it is discharged as clean water into ...
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Understanding F:M Ratio
F:M ratio as a theory is one of the most important aspects in wastewater treatment but also one of the most poorly understood concepts. Occasionally textbook numbers are good guides, however there are many instances in which understanding the complexity of F:M ratio may help to provide further insight. As a consultant it is very common to see strong emphasis on calculations such as F:M ratio. ...
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Ceramic Tube Diffuser EKR - Dirnau (Landshut) Purification Plant - Case Study
In 2019, ENVICON has won the tender for a retrofit of the ceramic tube diffusers in the Dirnau (Landshut) purification plant. As well as providing the diffusers, ENVICON also carried out the project coordination, removal, installation and commissioning as well as the disposal of the old diffusers. The existing plastic-bonded ceramic tubes were replaced. Due to the design of our diffusers, some ...
By ENVICON GmbH
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Energy saving on wastewater treatment plants through improved online control: case study wastewater treatment plant Antwerp-South
This work provides a case study on how activated sludge modelling and computational fluid dynamics (CFD) can help to optimize the energy consumption of a treatment plant that is already equipped with an advanced control based on online nutrient measurements. Currently, aeration basins on wastewater treatment plant Antwerp-South are operated sequentially while flow direction and point of inflow ...
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Thermal Mass Flow Meters Improve Efficiency in Wastewater Treatment Plants
Every municipality throughout the country has a wastewater treatment plant to safely treat water that enters back into our environment. This doesn’t mean they are immune to problems. One of the biggest problems for US wastewater treatment plants is the aging infrastructure with an estimated 180 billion dollars needed to repair many wastewater plants. A close second is the energy needed to ...
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Pump and mixer team to treat wastewater - Case Study
Problem Serving 11,000 residents, the Stafford (Conn.) Water Pollution Control Facility needed an upgrade. Solution To improve maintenance and equipment service life, plant personnel installed six 1.8 hp Landia mixers in the anoxic tanks as part of a new activated sludge process. Three 2.4 hp Landia axial flow pumps were added to the aeration basins to return nitrified mixed liquor to the ...
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Maximum Air Pressure for Diffusers
In the water and wastewater treatment field there are many needs and/or opportunities to upgrade existing facilities or to construct new facilities where space is limited. The available space can severely constrict the capacity of treatment facilities, or reduce the options available for design and implementation of the treatment process. Some of the needs facing many potential facilities is the ...
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Optimizing air flows to aeration basins – Case Study
As a result of clean energy mandates and the rising cost of energy, wastewater treatment facilities around the country are retrofitting their instrumentation to run highly efficient, cost-effective, clean facilities. To reduce emissions and produce clean energy, solid wastes are often digested in large digester tanks to reduce the volume of waste (sludge) and produce more biogas, which is then ...
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CH#825 - Improved Phenol Bio-Degradation
BackgroundThe treatment plant at this industrial facility treats approximately 0.3 mgd waste containing phenolic compounds. Over the past year the treatment works has improved performance and consistently been able to produce good quality effluent with respect to phenol, however, an improvement in performance was required to meet future discharge limits. To achieve this level of treatment, the ...
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