aerator Articles
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The effects of different aeration patterns on aerobic granulation
In this study, the effects of aeration patterns in terms of intra- (S1) and extra- (S2) aeration on aerobic granulation were investigated. Granules developed in S1 were retarded due to the high shear force of highly mixed air bubbles, and they were more solid while the S2 granules were porous with many distinct pores and channels. Mature granules in two series had comparable specific oxygen ...
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Project - WTP Industry: Masure
Process: Lagoon Low speed surface aerator AIRMAX Quantity: 6 Diameter: 2.1m Power: 37kw each Turnkey project including electrical cabinet and O2 management ...
By KAMPS s.a.
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Optimization of aeration conditions in the hybrid process of coagulation-ultrafiltration with air sparging
To optimize the aeration conditions in the hybrid process of coagulation-ultrafiltration with air sparging, a series of air flow rates under continuous and intermittent sparging were investigated. The water quality characteristics that surrounded membranes, bubble characteristics, fouling resistances, and energy consumption under different aeration conditions were analyzed. The results showed ...
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Ammonium reduction from piggery wastewater using immobilized ammonium-reducing bacteria with a full-scale sequencing batch reactor on farm
This work aims to evaluate the efficiency of ammonium removal from piggery wastewater by an intermittent aeration (IA) sequencing batch reactor (SBR) with immobilized NH4+-reducing bacteria under mesophilic conditions. When a 20-L bench-scale SBR with 11% (v/v) of alginate beads containing NH4+-reducing bacteria was used, removal efficiency of NH4+ was 63% ...
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Exploring aeration-associated energy savings at a conventional water reclamation plant
Aeration accounts for a large fraction of energy consumption at conventional water reclamation plants (WRPs). Older plants were designed when control techniques were relatively primitive and energy consumption was less of a concern. As a result, although process operations at older WRPs can satisfy effluent permit requirements, they can operate with excess aeration. In this study, we ...
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Effect of environmental factors on allelopathic inhibition of
Microcystis aeruginosa by berberineTo understand how environmental conditions affect the allelopathic inhibition of toxic Microcystis aeruginosa by berberine, the independent effects of some environmental factors, including temperature, light, and aeration, on the growth and extracellular microcystin (MC) content of M. aeruginosa (FACHB 905) treated with 0.000 and 0.001% (w/v) berberine were investigated. The results ...
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Effect of carbon sources on nitrous oxide emission in a modified Ludzak Ettinger process
Effect of methanol and glycerol on nitrous oxide (N2O) emission in two laboratory-scale modified Ludzak Ettinger (MLE) processes was investigated during three distinct periods: dissolved oxygen (DO) control by intermittent aeration with a DO controller, and high and low aeration rates. N2O consumption rate in an anoxic tank and aeration mode influenced N2O emission rates from the MLE processes. ...
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Aeration performance of hydrodynamic flow regulators
Hydrodynamic flow regulators are used in environmental engineering as a replacement for traditional flow throttling devices. They are extremely efficient, reliable and free from the common disadvantages of traditional devices. Recent research by the authors indicated that the atomization of a liquid by hydrodynamic flow regulators accelerates oxygenation and may be used for improving the ...
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Prairie farm rehabilitation administration paper
The aeration efficiency of two types of aeration devices, air injection and mechanical surface aerators was evaluated in farm dugouts in the Peace River Region of Alberta. The air injection systems were tested using three types of diffusers; open-ended tubing, linear fine bubble diffusers and a membrane diffuser. Our results indicate that without aeration, anoxia can develop in the bottom of ...
By EP Aeration
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Oxygen, the fix for pond problems
Aeration of a water feature should have three main considerations. These include preventing thermal stratification, balancing the dissolved oxygen levels throughout the water column from the sludge or benthic layer to the surface and balancing temperature levels throughout the water column. Although oxygen transfer from certain methods may be significant, the greatest amount of oxygenation takes ...
By EP Aeration
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Project - Tank cleaning
AIRMAX floating and fully covered with heat recovery Replacement of high speed aerators HEAT RECOVERY SYSTEM Higher (de) nitrification speed ...
By KAMPS s.a.
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Oxygen transfer in activated sludge – new insights and potentials for cost saving
The α-factor has the greatest impact on the calculation of the required standard oxygen transfer rate (SOTR) in activated sludge systems equipped with submerged aeration systems. Knowing the dependencies of the α-factor leads to a better design of the aeration devices and, consequently, to a more efficient use of aeration energy. Applying the current state of knowledge about oxygen transfer leads ...
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Performance evaluation of wastewater treatment using horizontal subsurface flow constructed wetlands optimized by micro-aeration and substrate selection
The effects of micro-aeration and substrate selection on domestic sewage treatment performance were explored using three pairs (with or without micro-aeration) of horizontal subsurface flow (HSSF) constructed wetlands (CWs) filled with zeolite, ceramsite or quartz granules. The individual and combined effects of micro-aeration and substrate selection on the purification performance of the ...
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Texas Department of Criminal Justice - Case Study
Upgrade of Existing Oxidation Ditches Howard Gray, Environmental Specialist IV, TDCJ Between 2004 and 2008, TDCJ has upgraded oxidation at five sites with S&N Airoflo Floating Brush Rotors, Bridges and EZ Access Systems. As of May, 2009, Howard Gray, Environmental Specialist IV at TDCJ, was in the process of purchasing 12 more units, with plans on "replacing all my fixed aerators within ...
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Influence of air flow rate and backwashing on the hydraulic behaviour of a submerged filter
The aim of this study was to evaluate backwashing effects on the apparent porosity of the filter media and on the hydraulic behaviour of a pilot scale submerged filter, prior to biofilm colonization, under different hydraulic retention times, and different air flow rates. Tracer curves were analysed with two mathematical models for ideal and non-ideal flow (axial dispersion and Wolf and Resnick ...
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Grenada, MS - Case Study
In 1992, the city of Grenada replaced a Trickling Filter System with an Aerated Lagoon System using twelve S&N Airoflo 10 HP Floating Brush Rotors. Various upgrades have been made to the equipment on an "as needed" basis. Some of the original Wastewater Lubricated Bearings are still in use ...
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N2O emissions from a one stage partial nitrification/anammox process in moving bed biofilm reactors
Nitrous oxide (N2O) emissions from wastewater treatment are getting increased attention because their global warming potential is around 300 times that of carbon dioxide. The aim of the study was to measure nitrous oxide emissions from one stage partial nitrification/anammox (Anaerobic Ammonium Oxidation) reactors, where nitrogen is removed in a biological way. The first part of the ...
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Case Study: Kuusakoski Ltd
Kuusakoski Ltd is one of the leading recycling companies in the Baltic region. At one of their waste stations a Waterix AIRIT® 200 aerator was installed in the filtration water basin in autumn 2006. The volume of the drainage basin is 6000 cubicmeters and normally the water level is kept at 2000 cubics. The environment is challenging, as there is lots of ammonium nitrogen and chlorides in the ...
By W-Rix Ltd
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Nitrogen removal from livestock and poultry breeding wastewaters using a novel sequencing batch biofilm reactor
A study was conducted regarding the biological nitrogen removal from the livestock and poultry breeding wastewater (LPBWs) using a novel sequencing batch biofilm reactor (SBBR). Nitrogen removal process was studied under three aeration strategies/modes, referred to as MODE 1, 2, and 3. The results showed that MODE 2 (one operation period: instant fill of LPBWs, 3.0 h aeration, 1.5 h non-aeration, ...
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Mechanism studies on nitrogen removal when treating ammonium-rich leachate by sequencing batch biofilm reactor
The nitrogen removal mechanism was studied and analyzed when treating the ammonium-rich landfill leachate by a set of sequencing batch biofilm reactors (SBBRs), which was designed independently. At the liquid temperature of (32 ± 0.4)°C, and after a 58-days domestication period and a 33-days stabilization period, the efficiency of ammonium removal in the SBBR went up to 95%. Highly frequent ...
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