wastewater treatment problem Articles
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Rotary Drum Screen - Case Study
This case study showcases how the Old Atlanta Club Wastewater Treatment Facility has solved its debris problem thanks to Aqualitec's rotary drum screen Drumtec which is ian internally fed rotating drum screen built for heavy pretreatment applications such as draining, mud thickening, and sandy or industrial wastewater treatment. Not only it is now much easier for the facility to produce high ...
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Enhanced Performance & Cost Reduction - Case Study
Improve mixer fleet health while simultaneously eliminating unplanned downtime with Philadelphia Mixing Solutions’ Aftermarket Services The Problem: A municipal wastewater treatment facility in New Jersey had 4 Aeration Tanks with an aging fleet of 53 mechanical low speed surface aerators. This equipment had been running for 20+ years and was beginning to show its age, resulting in an ...
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Sichuan Mianyang Lier Chemical Pesticide Wastewater Concentration and Emission Reduction Project
Application: pesticide wastewater Scale: 7500 tons / day Process: Jiarong tube ultrafiltration membrane INTRODUCTION Project Introduction: Lier Chemical's 7,500 tons / day pesticide wastewater treatment project is a very large MBR tubular membrane project. Pesticide wastewater treatment is a recognized technical problem. Jiarong Technology applied its own high concentration technology to ...
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Comparison of four types of membrane bioreactor systems in terms of shear stress over the membrane surface using computational fluid dynamics
Membrane bioreactors (MBRs) have been used successfully in biological wastewater treatment to solve the perennial problem of effective solids–liquid separation. A common problem with MBR systems is clogging of the modules and fouling of the membrane, resulting in frequent cleaning and replacement, which makes the system less appealing for full-scale applications. It has been widely ...
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Three successful approaches for controlling odor in wastewater treatment ponds
Solving odor problems in wastewater treatment ponds should begin with a few investigative questions: How was the pond designed? Has the pond operation changed over the years? What is the purpose and operational theory of each pond, and have ponds been added or closed? Why are odors apparent on some days and not others? Understanding these “hows” and “whys” will ...
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What Is Decentralized Treatment?
Why is decentralized treatment an important solution for global water scarcity challenges? Modular, containerized treatment plants like the ones in Fluence’s NIROBOX™ line deliver water and wastewater treatment to exactly where it’s needed. Nirobox units can be used singly or in multiples to scale your project to its required treatment capacity. As the climate shifts and ...
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Case study - Heat loss - A problem for wastewater treatment & nitrification
Problem: Operators know aerobic and anaerobic systems need sufficient water temperature to keep microbial populations active and working. Heat loss is detrimental to effluent quality and gas production. Both systems can be negatively affected from low daily and seasonal temperatures. Unfortunately, most operators and engineers have no control over water temperature loss in their tanks and basins. ...
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What is decentralized treatment?
Why is decentralized treatment an important solution for global water scarcity challenges? As the climate shifts and water supplies shrink due to increased use by municipalities, agriculture, and industry, the need for effective and efficient water and wastewater treatment in remote locations is growing exponentially all over the globe. In addition, the energy to power these plants and the ...
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Occurrence of
Microthrix parvicella in sequencing batch reactorsSequencing batch reactors (SBRs) are known for high process stability and usually have a good sludge volume index (SVI). Nevertheless, in many SBRs in Germany for municipal wastewater treatment, scum and foam problems can occur, and SVI can be larger than 200 mL/g. The microscopic investigations of the activated sludge from plants with nitrogen and phosphorus removal have shown that Microthrix ...
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Evaluating performance of vertical flow constructed wetland under various hydraulic loading rates in effluent polishing
The discharge of untreated wastewater or partially treated effluent and runoff from agricultural fields into water bodies is a major source of surface water pollution worldwide. To mitigate this problem, wastewater treatment using wastewater stabilization ponds and constructed wetlands have been promoted. The performance of such wastewater treatment systems is strongly dependent on their ...
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3 Common Mistakes When Choosing a Wastewater Treatment System
It’s never a fun time to encounter unpalatable or dangerous water when you’re trying to run your business. Wastewater treatment systems and products are an important part of making sure your water remains free of rust, sediment, smells, waste, and harmful bacteria. That is why it is important to consider many factors when choosing a wastewater treatment system.Unfortunately, many business owners ...
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Ice Cream
Problem: This ice cream maker, established almost 70 years ago, is one of the largest premium ice cream companies in the USA. The plant discharged its wastewater to the local sanitation plant until 1987, at which time heavy restrictions were placed on their discharge permit. The plant manager hired a consulting firm, and together they proceeded to investigate wastewater treatment systems that ...
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Control of Microthrix parvicella and sludge bulking by ozone in a full-scale WWTP
Bulking and rising sludge are common problems in wastewater treatment plants (WWTPs) and are primarily caused by increased growth of filamentous bacteria such as Microthrix parvicella. It has a negative impact on sludge settling properties in activated sludge (AS) process, in addition to being responsible for foam formation. Different methods can be used to control sludge bulking. The aim of ...
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Water And Wastewater Treatment Facilities
WATER AND WASTEWATER TREATMENT FACILITIES Some municipalities operate their own public utilities. Water and wastewater treatment is the one. You can figure out that the water treatment plant requires the installation of pumping stations (both subterranean and above ground) in order to make the water movement in the system. WHY NEED DEHUMIDIFIER FOR WATER AND WASTEWATER TREATMENT FACILITIES The ...
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Water And Wastewater Treatment Facilities
Water And Wastewater Treatment Facilities WATER AND WASTEWATER TREATMENT FACILITIES Some municipalities operate their own public utilities. Water and wastewater treatment is the one. You can figure out that the water treatment plant requires the installation of pumping stations (both subterranean and above ground) in order to make the water movement in the system. WHY NEED DEHUMIDIFIER FOR ...
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Why many control systems fail. Water Environment and Technology
Abstract: When implementing real-time process control systems at wastewater treatment plants (WWTPs), several technical problems may have to be addressed. Sensors have to be reliable. Controllers should be properly designed and tuned. Fault detection should be implemented and safety nets designed. Actuators must have adequate control authority to deal with changing influent quality and quantity. ...
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Upstream silver source mapping – a case study in Stockholm, Sweden
Silver (Ag) can be a problem for wastewater treatment plants (WWTP) and their capability to use sewage sludge as a soil fertilizer. Due to a high accumulation rate in soils, the levels of Ag in the incoming water at the WWTP must be reduced. This study aims to identify major diffuse emission sources in the technosphere through a comprehensive substance flow analysis of Ag in Stockholm, Sweden. ...
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Factors affecting population of filamentous bacteria in wastewater treatment plants with nutrients removal
Filamentous population in activated sludge and key operational parameters of full-scale municipal wastewater treatment plants (WWTPs) with bulking problems representative for Poland were investigated with quantitative fluorescence in situ hybridization. Statistical analyses revealed few relationships between operational parameters and biovolume of filamentous bacteria. Sludge age was not only ...
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Solving a messy problem: Covering wastewater treatment in Halton region Ontario, Canada case study
The Regional Municipality of Halton or Halton Region is located in Southern Ontario, part of the greater Toronto area. Halton owns and operates seven wastewater treatment plants for four Ontario cities in its jurisdiction. These plants are designed to treat wastewater from homes and businesses turning the effluents into biosolids. Turning waste into food requires a process that starts with the ...
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Long-term lift station rehabilitation at Jefferson Parish, Louisiana
Municipalities in the United States are annually spending hundreds of millions of dollars to replace and to repair corroded concrete infrastructures in their wastewater collection systems. In addition, billions more dollars will be needed in the coming years to restore, replace, and upgrade existing facilities all across the United States. Structures such as wet wells, grit chambers, sewer lines, ...
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