channel aerator Articles

  • Performance of Floating Horizontal Aerators in Aerated Lagoons and Oxidation Ditches

    INTRODUCTION When selecting aeration equipment to use for a specific application, issues to address include reliability, serviceability, capital cost, system appurtenances, and cost of operation and maintenance. Another important consideration is oxygen transfer rate (OTR). Horizontal floating aerators have relatively high transfer rates and have been used successfully in aerated lagoons and ...


    By S & N Airoflo, Inc.

  • ECS compost aeration floors - the foundation of aerated compost system design

    Inventive minds have come up with an amazing number of variations to channel air through a floor and into, or out of, a compost pile. Designs that have been based on sound engineering calculations and experience have generally worked. However, since all aeration floors are constrained by physics and Murphy, the floors that were less rigorously designed have not faired well. The characteristics by ...


    By Engineered Compost Systems

  • 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 ...


    By Inderscience Publishers

  • Case study - Meeting compliance with process aerators

    Equipment improves process, saves energy This Florida city is a perfect blend of aging gracefully while staying at the forefront of environmental protection. When this pristine community started experiencing problems with its wastewater treatment system, they found a solution ...

  • AIRE-O2® Aerators tests number one in three critical areas

    Problem In 1986, this southern USA fine paper mill developed problems on start-up from a Christmas shut-down, requiring quick action to add efficient aeration to its 38 MGD (143,830 m 3) flow. Poor winter treatment, channeling throught the system, and high solids had also been problems. Since the company was committed to preserving the environment, it searched for the best aerators to meet its ...

  • A new Technology for Composting: Suction Aeration for Opening Composting Works

    Cost-efficient solution for smell emission reduction The enormous waste quantities that are produced day by day are one of the most difficult problems for the economy as such, for cities and communities and for private households. Storage capacities for waste are scarce everywhere. Therefore solutions of all kinds that reduce waste quantities or recycle waste materials to be reused in the ...

  • Significant Improvements in Biofilter Performance for H2S and VOC Removal Using Biotrickling/Bioscrubber Technology in the Aeration Distribution Plenum System

    ABSTRACT Biofilters can handle the removal challenge of a diverse mix of complex odors and VOCs. However, there are significant limitations in handling levels of hydrogen sulfide (H2S) loadings above 10 ppm. High levels of H2S loading in biofilters will create an increase in the acidithiobacillus colony causing an overproduction of acid. This will destroy all other biodegrading ...

  • 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 ...


    By IWA Publishing

  • Performance assessment of a wastewater treatment plant treating weak campus wastewater

    A detailed characterisation of the influent and the effluent wastewater for one year period and a performance evaluation was carried out for the wastewater treatment plant of Cumhuriyet University (Sivas, Turkey). The objective of this work was to investigate the performance of different units in overall treatment of the plant and particular attention was given to the performance of the extended ...


    By Inderscience Publishers

  • Case study - Designed for generations

    South Dakota facility retrofits advanced process control system Nearly 25 years ago, the consulting engineering firm Banner & Associate, Inc. designed an efficient wastewater treatment facility for a city in S.D. that featured process control, flexibility and treatment efficiency while minimizing operating and maintenance costs. Key to the system was the ...

  • Designed for generations, water & wastes digest

    Nearly 25 years ago, the consulting engineering firm Banner & Associate, Inc. designed an efficient wastewater treatment facility for the city of Madison, S.D., that featured process control, flexibility and treatment efficiency while minimizing operating and maintenance costs. Key to the system was the aspirator aeration system that supplied reliable oxygenation and mixing to the oxidation ...

  • Retrofitting a classic

    Process aerators update historic city’s treatment plant St. Augustine, Fla., was founded by the Europeans in 1565, making it the oldest city in the U.S. Despite its history, this Floridian city has combined graceful aging and environmental zeal into a perfect blend of sustainability. When this pristine community started experiencing problems with its wastewater ...

  • Aire-O2 Triton Solves Bulking Problem

    The Dubai Investments Park (DIP) wastewater treatment plant (WWTP) is located about 20 miles south of the Burj Khalifa – the world’s tallest building. The oxidation ditch activated sludge plant recently found itself strained by filamentous sludge bulking likely caused by high organic loads, high summer temperatures and inevitable low dissolved ...

  • Triton solves bulk of the problem case study

    The Dubai Investments Park (DIP) wastewater treatment plant (WWTP) is located about 20 miles south of the Burj Khalifa – the world’s tallest building. The oxidation ditch activated sludge plant recently found itself strained by filamentous sludge bulking likely caused by high organic loads, high summer temperatures and inevitable low dissolved oxygen. The problem was easily ...

  • Mixers and Flowmakers: Mixers at Bremen-Seehausen WWTP

    Treatment of 50 million cubic meters of wastewater per year - find more information on their website. Landia has a total of 26 submersible mixers operating at this plant. 10 mixers in the denitrification (BNR = biological nutrient removal) process, 6 of them in the denitrification tanks, 4 of them in effluent channels leading to these tanks for mixing of ...


    By Landia

  • Water quality monitoring following Hurricanes Katrina and Rita

    Following the passage of Hurricane Katrina, New Orleans was left with 80% of its land area flooded. In some locations, the flood waters were over 30 feet deep. In the heat and stagnation, the waters quickly became heavily polluted. Pump out operations began in early September 2005 to get the city dried out quickly. Lake Pontchartrain was the primary receiving water body. A variety of approaches ...


    By Inderscience Publishers

  • A multi-parameter analyzer helps a Kentucky treatment plant step up to the plate and meet a new phosphorus limit in its permit

    In 2001, the Lexington Fayette Urban County Government West Hickman Creek Wastewater Treatment Plant in Nicholasville, Ky., was starting Phase II of its third upgrade since 1972, when the state imposed a phosphorus limit. Total phosphorus hovered around 6 mg/l, but the permit required 1 mg/l monthly average and 2 mg/l daily maximum from May through October. Engineers from Tetra-Tech, the ...

  • Fixed activated sludge treatment (FAST®) process technology overview

    Biological treatment systems for small communities and even single-family dwellings have been available in the general water pollution control market for many years. These systems are basically scaled-down versions of the activated sludge process, utilizing suspended growth systems. Historically, the main operational problem associated with these systems has been the management of the sludge ...


    By Bio-Microbics, Inc.

  • How to prepare your WWTP for cold weather

    Being proactive during cold weather can noticeably reduce wastewater treatment plant upsets While most people enjoy the cooler temperatures that come with fall, they can cause a well-running wastewater treatment plant to have issues almost overnight. Bacteria do not reduce BOD or reproduce as effectively during the colder months of the year. They generally favor temperatures between 68 and ...

  • Municipal waste water treatment plant case study

    A municipal WWTP in the North of England was experiencing significant problems with accumulations of FOG in the Wetwell at the head of the treatment plant. The FOG would form a solid cap over the well several feet thick. This put considerable strain on the pumping gear, interrupted the performance of the float switches and required regular manual intervention from the staff. High costs were also ...


    By Cleveland Biotech Ltd.

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