Fine Bubble Aeration Articles on Environmental XPRT

Energy, cost and design aspects of coarse- and fine-bubble aeration systems in the MBBR IFAS process

With the MBBR IFAS (moving bed biofilm reactor integrated fixed-film activated sludge) process, the biomass required for biological wastewater treatment is either suspended or fixed on free-moving plastic carriers in the reactor. Coarse- or fine-bubble aeration systems are used in the MBBR IFAS process. In this study, the oxygen transfer efficiency (OTE) of a coarse-bubble aeration system was ...

Dec. 9, 2016

By IWA Publishing

Design of fine-bubble aeration systems for municipal WWTPs with high sea salt concentrations

The impact of sea salt on the aeration coefficient kLa of fine-bubble aeration systems was investigated in clean water and in a model substance for simulating activated sludge. The investigations were carried out at laboratory and pilot scale. Sea salt was dosed in the form of artificial seawater, real seawater or simplified, by adding NaCl. The investigated media showed an increase of ...

Jan. 19, 2017

By IWA Publishing

The principles of aeration and mixing utilizing process aerator technology

Aeration and mixing are necessary elements for aerobic biological wastewater treatment processes to maintain a healthy, stabilized biological population and thus, insure optimal treatment of the wastewater assuming there is adequate contact time and substrate available. In the design of wastewater treatment plants, aeration typically involves supply of both oxygen and mixing. Aeration is a large ...

Jan. 14, 2011

By Aeration Industries International (AII)

Fighting Foam in Aeration Tanks

Just like a poorly poured pint of beer can wreak havoc on your coffee table, excessive foam formation in aeration tanks can create operational challenges for both municipal and industrial treatment plant operators. In municipal plants, foam formation is common during secondary treatment startup, as the young microbiology is unable to breakdown surfactants associated with soap, shampoo, ...

Oct. 20, 2016

By KLa Systems, Inc.

Alpha Factors in Full-Scale Wastewater Aeration Systems

ABSTRACTSurface active agents depress gas transfer at gas-liquid interfaces. They are present as measurable trace contaminants at all environmental and at most industrial gas-liquid interfaces. This paper presents the results of several studies, including lab and full scale studies that show the depression of gas transfer, usually quantified by the alpha factor, can be related to the Reynolds ...

Oct. 22, 2006

By Water Environment Federation (WEF)

A perfect pair: SBR designs & advanced aeration technology

Conventional sequencing batch reactors (SBRs) that utilize diffused-air networks have existed in the U.S. for about three decades now. The reliability of controls and instrumentation has significantly improved in the last 10 to 15 years, and as a result, SBR plant designs are becoming more widely accepted. The attractiveness of their compact layout and ease of operation has also helped increase ...

Oct. 1, 2007

By Aeration Industries International (AII)

Case study - Aeration ditch upgrade exceeds expectations

Triton Process Aerators Meets Future Nitrogen Permit Regulations When the a Pennsylvania Sewer Authority was researching methods to improve the dissolved oxygen levels in its wastewater treatment plant’s oxidation ditches in 2001, they decided to totally replace its aging brush rotor system. They replaced the rotors with the ...

Jun. 2, 2015

By Aeration Industries International (AII)

Case study - Cheese manufacturer gets aeration upgrade

Largest Cheese Manufacturer in the UK Gets Aeration Upgrade Dairy Crest Davidstow Creamery in Camelford is the largest cheddar cheese manufacturer in the UK. The process of collecting and processing milk is a 24/7 operation, generating effluent round the clock and needing to be treated and disposed of continuously. Effluent from the cheese-making process contains high fat content and ...

Nov. 5, 2016

By Aeration Industries International (AII)

Efficient aeration system boosts energy savings

A new efficient aeration system saves the Ontario, Ore., wastewater treatment facility $47,000 annually in energy costs. Besides giving this community a financial boost, the new system netted additional equipment cost savings by cutting aeration horsepower by more than half at the plant. The environmentally conscious city, located in the Oregon/Idaho border area, is meeting all of its effluent ...

Mar. 10, 2006

By Aeration Industries International (AII)

In Situ Local Parameter Measurements for CFD Modeling to Optimize Aeration

ABSTRACTMeasurement methods to determine in situ local parameters were developed, in order to optimize design and operating parameters impacting oxygen transfer in aeration tanks equipped with EDPM membrane diffusers and slow speed mixers. New tools to measure bubble sizes and gas hold-ups were coupled with the traditional ones used to determine liquid velocities and oxygen transfer coefficients. ...

Oct. 22, 2006

By Water Environment Federation (WEF)

Improving Efficiency and Reducing Energy and Maintenance Costs in Aeration Systems

Energy costs for operating an aeration system in a biological wastewater treatment plant often times exceeds 75% of the total energy costs for the plant. Adding in blower and diffuser maintenance costs, Aeration Systems are easily the most costly portion of the treatment process, many times consuming so many resources that other parts of the plant may not be properly maintained or operated. By ...

Oct. 13, 2007

By Water Environment Federation (WEF)

Why does modern aeration technology make the treasurer happy?

The aerzen combined system provides optimum efficiencies at the wallau wastewater treatment plant The combination of different technologies for air conveying enablesoptimal energy use of oxygen for biological degradation processes in wastewater treatment plants. Concrete savings resulting from the use of AERZEN machines demonstrate this in practice at the Wallau plant. In 2016, ...

Mar. 30, 2017

By Aerzen USA Corporation

Triton aerator/mixer saves energy & operational costs & reduces carbon footprint

Municipal and industrial users tackle many wastewater treatment challenges at their facilities including meeting more stringent permit limits with limited or declining resources. The ideal solution for today’s professional is finding an innovative technology that offers a cost-effective, sustainable treatment solution that exemplifies environmental stewardship in the community. Many ...

Jun. 18, 2009

By Aeration Industries International (AII)

BM respirometry study about nitrification inhibition and actual aeration capacity in an activated sludge process case study

Study for municipal WWTP in Spain This study is ordered to SURCIS as a consequence of the low process performance, practical absence of nitrification treatment. By other side, the mixed-liquor presented some abnormal features such as weakness, dark colour and abundant white foaming. Data for study interest Aeration system: fine ...

Nov. 19, 2014

By SURCIS, S.L.

KLa Slot injector™ Aeration system assists cheese & Whey production plant solve its Nitrogen discharge challenge - Case Study

The Challenge A gourmet cheese, whey protein, and lactose production facility located in the Midwest had been utilizing a land application system for effluent discharge for over 40 years. Using a combination of ridge and furrow and spray irrigation, the plant had many years of success applying their wastewater to the land. However, as the gourmet cheese products gained in popularity along ...

Jan. 14, 2015

By KLa Systems, Inc.

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 ...

Mar. 14, 2012

By EP Aeration

Kärkölä municipality - rationalisation of Waste water plant

Situation in the beginning two Brush aerators capacity is not sufficient during the peaks Brush aerators demand relatively lot maintenance and are in the end of their working life The flow is not sufficient part of the sludge lands on the bottom of ring basin Direct feedback connection from the oxygen sensor to the aerator via AC Drive is not ...

Nov. 28, 2009

By W-Rix Ltd

Assessment of diffuser pressure loss on WWTPs in Baden-Württemberg

Aeration of activated sludge is a critical treatment step for the operation of activated sludge plants. To achieve a cost effective treatment process, assessing and benchmarking of aeration system performance are important measures. A simple means of gauging the relative condition of a fine bubble diffused aeration system is to evaluate the pressure loss of the diffusers as oxygen transfer tests ...

Jan. 1, 2011

By IWA Publishing

Full scale evaluation of diffuser ageing with clean water oxygen transfer tests

Aeration is a crucial part of the biological wastewater treatment in activated sludge systems and the main energy user of WWTPs. Approximately 50 to 60% of the total energy consumption of a WWTP can be attributed to the aeration system. The performance of the aeration system, and in the case of fine bubble diffused aeration the diffuser performance, has a significant impact on the overall plant ...

Jan. 1, 2011

By IWA Publishing

An assessment of oxygen transfer efficiency in a gas permeable hollow fibre membrane biological reactor

The clean water oxygen transfer efficiency (OTE) of a full scale non-porous hollow fibre gas permeable (GP) membrane (surface area of 500 m2) was evaluated at inlet air pressures of 1.2, 1.4, and 1.8 atm using two established testing methods. To form a basis of comparison with traditional aeration technologies, additional testing was done with conventional aerators (fine bubble and coarse bubble ...

Mar. 1, 2010

By IWA Publishing

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