municipal wastewater Articles
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Why municipal wastewater treatment is important?
Municipal Wastewater Treatment is the process of ejecting the harmful pollutants from wastewater. The main source of pollutants is the domestic use. The pollutants are treated by various methods like Physical, Chemical, and Biological process. The practice of municipal wastewater treatment is best encouraged these days. This treated resource is best for utilizing in raising the crops. ...
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Municipal wastewater treatment plants as pathogen removal systems and as a contamination source of noroviruses and
Enterococcus faecalis Municipal wastewater treatment plants play a crucial role in reducing the microbial and pathogen load of human wastes before the end-products are discharged to surface waters (final effluent) or land spread (biosolids). This study investigated the occurrence frequency of noroviruses, Enterococcus faecalis and Enterococcus faecium in influent, final effluent and biosolids from four secondary ...
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Multi-stage constructed wetland systems for municipal wastewater treatment
In the present paper the detailed design and performances of two municipal wastewater treatment plants, a four-stage constructed wetlands (CW) system located in the city of Dicomano (about 3,500 inhabitants) in Italy, and a three-stage CW system for the village of Chorfech (about 500 inhabitants) in Tunisia, are presented. The obtained results demonstrate that multi-stage CWs provide an ...
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Ecology and performance of aerobic granular sludge treating high-saline municipal wastewater
The successful development of aerobic granular sludge (AGS) for secondary wastewater treatment has been linked to a dedicated anaerobic feeding phase, which enables key microbes such as poly-phosphate-accumulating organisms (PAOs) and glycogen-accumulating organisms to gain a competitive advantage over floc-forming organisms. The application of AGS to treat high-saline sewage and its ...
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Monitoring and evaluation of removal of pathogens at municipal wastewater treatment plants
The concentrations and removal of Cryptosporidium, Giardia, and microbial indicators, including somatic coliphages and fecal coliforms were investigated through the wastewater treatment processes at three municipal wastewater treatment plants in Beijing, China. The experimental results showed that the concentrations of Cryptosporidium in untreated wastewater, primary treatment effluent, secondary ...
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Recovery of reusable water from sewage using aerated flat-sheet membranes
Continuous developments and advances in membrane technology allow recovering to large extent reusable water from untraditional water sources, such as municipal effluents. In this paper, operational results and preliminary cost-analysis of a microfiltration (MF) process used for raw sewage and secondary effluent polishing are given. The research was conducted with a 22 sandwich-type flat-sheet ...
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Characterization and application of surface-molecular-imprinted-polymer modified TiO2 nanotubes for removal of perfluorinated chemicals
The removal of perfluorinated chemicals (PFCs) during wastewater reclamation is a great concern. However, the existing advanced treatment processes are inefficient for the removal of PFCs from secondary effluents of municipal wastewater treatment plants (WWTPs) because other coexistent pollutants with less environmental significance are removed simultaneously. Therefore, research on ...
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Evaluation of virus reduction efficiency in wastewater treatment unit processes as a credit value in the multiple-barrier system for wastewater reclamation and reuse
The virus reduction efficiency of each unit process is commonly determined based on the ratio of virus concentration in influent to that in effluent of a unit, but the virus concentration in wastewater has often fallen below the analytical quantification limit, which does not allow us to calculate the concentration ratio at each sampling event. In this study, left-censored datasets of ...
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Microbial reduction in wastewater treatment using Fe3+ and Al3+ coagulants and PAA disinfectant
Wastewater is an important source of pathogenic enteric microorganisms in surface water and a major contaminating agent of drinking water. Although primary and secondary wastewater treatments reduce the numbers of microorganisms in wastewater, significant numbers of microbes can still be present in the effluent. The aim of this study was to test the feasibility of tertiary treatment for ...
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In-depth characterization of secondary effluent from a municipal wastewater treatment plant located in Northern China for advanced treatment
This study provided insight into the characterization of secondary effluent from a wastewater treatment plant located in northeastern China. The secondary effluent was separated into three fractions, the dissolved, the near-colloidal and the suspended, to study their individual characteristics. It revealed that most of the organics in the secondary effluent existed in the dissolved form, ...
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The membrane fouling mechanisms of the PAC/BPAC-UF combined process used to treat the secondary effluent from municipal wastewater treatment plant
The combined processes of powdered activated carbon/biological powdered activated carbon- ultrafiltration (PAC/BPAC-UF) were used to treat secondary effluent. In this study, the effect of PAC and BPAC on membrane flux, membrane resistance and the removal of different molecular weight organic compounds were investigated. In addition, the structure characteristics of the microorganisms of the ...
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Synergistic application of advanced primary and secondary wastewater treatment systems
Published in Water and Waste Digest membrane issue, November 2008 Miroslav Colic; Chief Scientist, Clean Water Technology Inc., Los Angeles, CA To be published in Water and Waste Digest later this year The increased regulatory pressures and demand for reused water stimulated development of several new wastewater technologies in the last decade. Advanced treatment systems are characterized by ...
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Electrocoagulation Wastewater Treatment: Specialized Technology to meet the needs of food & beverage wastewater
The effects of water scarcity and stricter environmental regulations placed on water usage are increasing the cost of using freshwater globally. The consequences of these increasing costs on food and beverage companies are twofold, since the companies are charged for both the water that they utilize in their processes and on their wastewater discharge. Additionally, the food and beverage ...
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Electrocoagulation Solutions - Technology meets needs of food & beverage wastewater treatment - Case Study
The effects of water scarcity and stricter environmental regulations placed on water usage are increasing the cost of using freshwater globally. The consequences of these increasing costs on food and beverage companies are twofold, since the companies are charged for both the water that they utilize in their processes and on their wastewater discharge. Additionally, the food and beverage ...
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Textile Wastewater Treatment - An Application to Sustainably Reuse Water in the Textile Industry - Case Study
The textile industry is a water consumption intensive industry. Water is utilized for cleaning the raw material, and for the different steps in the textile dyeing process. Due to the effects of water scarcity and stricter environmental regulations, the cost of fresh water utilization has increased worldwide. In addition, the textile industry is faced with pressure by government regulators to ...
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Electrocoagulation Wastewater Treatment – An Application To Sustainably Reuse Textile Wastewater
The textile industry is a water consumption intensive industry. Water is utilized for cleaning the raw material, and for the different steps in the textile dyeing process. Due to the effects of water scarcity and stricter environmental regulations, the cost of fresh water utilization has increased worldwide. In addition, the textile industry is faced with pressure by government regulators to ...
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Sewage of Tripoli: a review of the current situation and of the future planning
Tripoli represents a major urban area in Lebanon with about 350,000 people in the city, which may swell by additional 100,000 when the city surrounding population is counted. It used to be a dominant agricultural region, but the last three decades witnessed a rapid development of urban construction. The goal of this paper was to present the current situation regarding the sewage disposal, ...
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Water recycling project - Durban South Africa
1. Overview and key points South Africa’s first private water recycling project, operating on a 20 year Buy-Operate-Transfer (BOT) basis has turned out to be a success. Constructed in order to treat Durban’s wastewater, it provides a good example of Public Private Partnership (PPP), where appropriate wastewater treatment technology was used in order to provide effluent of a ...
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How to Choose the Correct Biological Wastewater Treatment Process for Your Application
There is different discharge restrictions for wastewater produced by different sectors and industries. Treatment systems need to be designed around each individual application in order to specifically target and treat the pollutants produced by them. This is why it is important to choose the correct biological wastewater treatment process for secondary stage wastewater treatment. When choosing ...
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