sludge flow Articles
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The effect of BOD5 and flow-rate of activated sludge systems on investment and energy costs
In this study of wastewater treatment, the effect of flow-rate, BOD5 and other design parameters (MLSS, mean cell-residence time, etc.) on aeration tank dimensions, investment amount and energy cost has been investigated. The relations among these parameters are represented with mathematical equations, which could be useful in new plant design and in the estimation of investment and energy ...
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Sludge reduction in a small wastewater treatment plant by electro-kinetic disintegration
Sludge reduction in a wastewater treatment plant (WWTP) has recently become a key issue for the managing companies, due to the increasing constraints on the disposal alternatives. Therefore, all the solutions proposed with the aim of minimizing sludge production are receiving increasing attention and are tested either at laboratory or full-scale to evaluate their real effectiveness. In the ...
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Respirometric assays of two different MBR (microfiltration and ultrafiltration) to obtain kinetic and stoichiometric parameters
A comparison of two different medium scale MBRs (ultrafiltration and microfiltration) using respirometric methods has been achieved. The ultrafiltration membrane plant (0.034 µm pore size) maintained recirculation sludge flow at seven times the influent flow, and membranes were backwashed every 5 min and chemically cleaned weekly. The microfiltration membrane plant (0.4 µm pore size) maintained ...
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Computational fluid dynamics analysis of a high-throughput viscous heater to process feces and a fecal simulant using temperature and shear rate-dependent viscosity model
Open defecation and poor fecal management facilitates the spread of disease. Viscous heating can pasteurize fecal sludge by creating a high shear field in the annular gap between a stationary, cylindrical outer shell and a rotating inner core. As sludge flows axially through the annular gap, thorough mixing and frictional heating eliminate cool spots where microbes may survive. A viscous ...
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How can better data keep your wastewater plant flowing? - Case Study
Municipal Wastewater Plant (Germany) Did you know: Our Metris addIQ monitoring and control solution allows municipal wastewater operators to access in-depth performance and trend reports, real-time sludge and polymer flow monitoring, long-term process data and more from anywhere, on any device. Optimal sludge flows demand accu rate data – anytime, and anywhere. Which is why ...
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Improving the simultaneous removal of chemical oxygen demand and terephthalic acid in a cross-flow aerobic sludge reactor by using response surface methodology
Central composite design and response surface methodology (RSM) were implemented to optimize the operational parameters for a cross-flow aerobic sludge reactor (CFASR) in remedying mixed printing and dyeing wastewater (MPDW). The individual and interactive effects of three variables, hydraulic retention time (HRT), pH and sludge loading rate (SLR), on chemical oxygen demand (COD) and ...
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Project - WWTP Galt, California, USA
Plant: Galt, California, US Engineering Office: West Yost Associates, US Type of plant: Municipal Wastewater Treatment Plant Start-up: 2015 Application: Suspension & Homogenization in Sludge Storage Tank Flow generation in Carousel Type Aeration Tank Scope of supply: 1 HYPERCLASSIC- Mixer 6 CYBERFLOW- Flow Accelerator ...
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Nitrification and denitrifying phosphorus removal in an upright continuous flow reactor
Simultaneous nitrification and denitrifying phosphorus removal was achieved in a single-sludge continuous flow bioreactor. The upright bioreactor was aligned with a biomass fermenter (BF) and operated continuously for over 350 days. This study revealed that unknown bacteria of the Saprospiraceae class may have been responsible for the successful nutrient removal in this bioreactor. The ...
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Batch WWT System Reduces Cost, Sludge
Chapmans's ice Cream has become the first dairy operation in Ontario to have its own wastewater trearment plant, according to the Markdale Standard, the local newspaper. The firm selected a state-of-the-art Fluidyne ISAM (Inregrated Surge Anoxic Mix) anaerobic/aerobic batch reactor after also considering conventional SequencingBatch Reactor (SBR), up-flow sludge blanket filtration (USBF) and ...
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Granulation of anaerobic sludge in the sulfate-reducing up-flow sludge bed (SRUSB) of SANI® process
This study reports on anaerobic sludge granulation in a laboratory-scale sulfate-reducing up-flow sludge bed (SRUSB) in a novel sulfate reduction, autotrophic denitrification and nitrification integrated (SANI®) process for treatment of saline sewage. Granulation occurred in 30 d and reached full development in 90 d. The sulfate-reducing granules grew up to around 1 mm after 90 d with 21 ...
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Supmea - SUP-LDG - Flow Measurement in Sewage Treatment Plants
Sewage treatment plants play a crucial role in maintaining public health and environmental sustainability. Proper flow measurement within these plants is essential for efficient operation and accurate monitoring. One company that specializes in providing reliable flow measurement solutions for sewage treatment plants is Supmea with its SUP-LDG series. In this article, we will explore the ...
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Microfiltration for treatment of waste filter washwater at water treatment plant
The North Jersey District Water Supply Commission (Commission) serves about 2 million consumers from its 210 mgd water treatment plant (WTP) in Wanaque, New Jersey, about 25 miles northwest of Manhattan. Raw water is obtained primarily from the adj acent Wanaque Reservoir, and the nearby Pompton and Ramapo Rivers. The Wanaque WTP provides conventional treatment with chiorine as primary ...
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Up Flow - Anaerobic Sludge Blanket Reactor (UASB)
About Anaerobic Wastewater Treatment Anaerobic Wastewater Treatment is a wastewater treatment system using biology that without using of air or oxygen. It aimed to remove organic pollution in wastewater, slurries and sludge. Anaerobic microorganisms convert organic pollutants into a “biogas” which contains methane and carbon dioxide.1 About Up flow-Anaerobic Sludge Blanket Reactor ...
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Fecal coliform removal in a sulfate reduction, autotrophic denitrification and nitrification integrated (SANI) process for saline sewage treatment
The Sulfate Reduction, Autotrophic Denitrification, Nitrification Integrated (SANI) process has been specially designed to treat saline wastewater. In the process no biological excess sludge is produced. SANI process also has the added advantages of cost and footprint reduction when compared to traditional activated sludge processes. In the SANI pilot plant, the fecal coliform removal efficiency ...
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Knowledge-based system for automatic MBR control
MBR technology is currently challenging traditional wastewater treatment systems and is increasingly selected for WWTP upgrading. MBR systems typically are constructed on a smaller footprint, and provide superior treated water quality. However, the main drawback of MBR technology is that the permeability of membranes declines during filtration due to membrane fouling, which for a large part ...
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Combination of up-flow anaerobic sludge blanket reactor and a novel cascade sponge reactor for sewage treatment
Performance of the combined process of up-flow anaerobic sludge blanket (UASB) reactor and cascade sponge reactor (CSR) for sewage treatment was studied. UASB-CSR system was operated at HRTs of 24 h, 16 h, and 8 h at an average wastewater temperature of 29°C. It comprises of the most efficient combined process not only for CODT (98.9%), BODT (98.5%), TSS (99.3%), total nitrogen (89.1%), total ...
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Simultaneous nitrification and denitrification in activated sludge system under low oxygen concentration
Simultaneous nitrification and denitrification (SND), which is more economical compared with the traditional method for nitrogen removal, is studied in this paper. In order to find the suitable conditions of this process, a mixed flow activated sludge system under low oxygen concentration is investigated, and some key control parameters are examined for nitrogen removal from synthetic wastewater. ...
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Development of slow sponge sand filter (SpSF) as a post-treatment of UASB-DHS reactor effluent treating municipal wastewater
In this study, conventional slow sand filter (SSF) and modified slow sponge sand filter (SpSF) were investigated for the post-treatment of up-flow anaerobic sludge blanket (UASB)-down-flow hanging sponge (DHS) reactor effluent. The seasonal variation did not show significant differences in removal efficiencies of both filters. However in summer, both filters were able to achieve high total ...
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Treatment of natural rubber processing wastewater using a combination system of a two-stage up-flow anaerobic sludge blanket and down-flow hanging sponge system
A pilot-scale experiment of natural rubber processing wastewater treatment was conducted using a combination system consisting of a two-stage up-flow anaerobic sludge blanket (UASB) and a down-flow hanging sponge (DHS) reactor for more than 10 months. The system achieved a chemical oxygen demand (COD) removal efficiency of 95.7% ± 1.3% at an organic loading rate of 0.8 kgCOD/(m3.d). Bacterial ...
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Conversion of the RAS control at the WWTP Asselbrunn to sludge level
The paper presents the effects of gradual upgrade of existing secondary clarifiers of the waste water treatment plant (WWTP) Asselbrunn. From existing two clarifiers at the beginning only one has been modified (clarifier no. 2), while the other remained unchanged (clarifier no. 1). In a first step the intake structure of clarifier no. 2 has been modified at flow proportional return activated ...
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