clarifier aeration Articles

  • Comparing Shock Event Response Protocols for Wastewater Treatment Plants

    The wastewater treatment industry currently lacks a systematic framework of tested response guidelines and corrective action protocols to be implemented during and after toxic shock events.  The ability to respond to toxic spills, accidental and deliberate, necessitates a detailed compilation of probable process effect(s) from the contaminant(s), listing of potential corrective action ...

  • Activated sludge wastewater treatment plants optimisation to face pollution overloads during grape harvest periods

    ABSTRACTThe principal objective of our study was to optimise a municipal activated sludge wastewater treatment plant (WWTP) to face high organic flows due to viticulture effluents inputs. Treatment file optimization consisted in testing different treatment lines, changing the number and volume of biological basins and clarifiers, with or without a buffer basin upstream, with a view to achieving ...


    By IWA Publishing

  • A Simple Solution to Big Snail Problems - A Case Study at VSFCD’s Ryder Street Wastewater Treatment Plant

    A treatment facility operating on the northern edge of the San Francisco Bay, in Vallejo, California, was experiencing excessive growth of trickling filter snails in the plant’s two biotowers. Downstream of the biotowers, the snail shells would settle in the plant’s aeration basins and secondary clarifiers and cause major maintenance problems. Periodically the entire aeration basin and clarifier ...

  • Wilsonville WWTP Biosolids - Case Study

    About the Project The new facility includes two new structures: a dewatering and drying building, and a head works building. There are five additional major structures, including a new aeration basin, stabilization basin, clarifier, a bio-tower and ultraviolet light channel structure. All of these are used in the various stages of treating raw sewage before it is discharged as clean ...


    By Biorem Technologies Inc.

  • Supplemental aeration nearly eliminates filamentous sludge bulking - Case Study

    The Dubai Investments Park Wastewater Treatment plant in the United Arab Emirates faced challenges in their oxidation ditch due to filamentous sludge bulking, resulting in poor sludge settling in the secondary clarifier. Supplemental aeration was needed to eliminate the filamentous sludge bulking. Challenge: ...

  • Supplemental Aeration Nearly Eliminates Filamentous Sludge Bulking in Dubai - Case Study

    The Dubai Investments Park Wastewater Treatment plant in the United Arab Emirates faced challenges in their oxidation ditch due to filamentous sludge bulking, resulting in poor sludge settling in ...

  • Webitat Advanced IFAS System Addresses Common Fixed Media Concerns

    Integrated Fixed-Film/Activated Sludge (IFAS) technology has received widespread acceptance in the engineering community as the most economical new way to upgrade wastewater plants without building new aeration basins or clarifiers. BioWeb™ is a knit web-like fabric with high surface area designed to be installed directly into aeration basins to create a colony of attached growth biomass in the ...

  • Process Alternative Comparisons Assisted with Biowin Modeling

    ABSTRACTPermitted at 6.4 mgd on an annual average day basis, the City of Avondale Wastewater Treatment Plant currently employs Nitrification/Denitrification process to produce effluent with maximum total nitrogen of 10 mg/L. The process consists of Aeration Basins followed by Secondary Clarifiers to treat the screened influent after the grit removal. On the solids handling side, the Wasted ...

  • New Cloth Media Filter System Replace 4 MGD Traveling Bridge Filters with 12 MGD Capacity in Existing Tankage

    ABSTRACTThe Little Falls Run Wastewater Treatment Facility began experiencing operational difficulties with the dual-bay traveling bridge filter process as flows approached the rated capacity for the filters. Although initially the Utilities Department staff intended to duplicate the original filter process and thereby double the capacity, the recent introduction of a cloth media filter product ...

  • Amnite k100 & k150 case study

    This trial was carried out in the waste water treatment plant of a paper mill with severe bulking problems. Large amounts of suspended solids regularly overflowed from the secondary clarifier and the aerated lagoon had a scum layer of about 20cm on top. This scum layer contained a lot of filamentous bacteria. The effluent from the clarifier flowed into a river resulting in visual floating clumps ...


    By Cleveland Biotech Ltd.

  • Amnite k100/k150 case study

    This trial was carried out in the waste water treatment plant of a paper mill with severe bulking problems. Large amounts of suspended solids regularly overflowed from the secondary clarifier and the aerated lagoon had a scum layer of about 20cm on top. This scum layer contained a lot of filamentous bacteria. The effluent from the clarifier flowed into a river resulting in visual floating clumps ...


    By Cleveland Biotech Ltd.

  • Benzaco scientific`s ODOR-ARMOR® helps meet operational acceptance within a community

    The Problem - Since 1997, a Northeastern United States recycled paper mill has been under the scrutiny of the Department of Enviromental Protection (DEP) for odor complaints from the surrounding community. The neighboring community had the power to close the plant because of the smells. Either the mill resolved the odor problems or the DEP and the community would force the plant to close. ...


    By Benzaco Scientific, Inc.

  • A wastewater plant bio-augmentation success

    Rosethorne WWTP is located in Jefferson Parish, Louisiana, just west of New Orleans. The plant was constructed in the mid-1990s with a design capacity of 400,000 GPD. Today, the average daily flow through the plant is approximately 250,000 GPD. During Hurricane Katrina, in 2005, the plant suffered considerable damage to its mechanical infrastructure, and even after repairs, its effluent was ...


    By Reliant Water Technologies

  • Town of Manhattan, MT 400,000 GPD Bio-wheel plant case study

    The Manhattan treatment plant is a 400,000 GPD plant in two trains, containing six 24 x 5.0 Bio-WheelTM. It is able to nitrify and denitrify, with two anoxic basins ahead of the aeration basins. Two conventional flight and scraper clarifiers are used. Three Penn Valley RA S/MLSS pumps are located in a separate pump room. The plant is designed for a future expansion to 0.8 MGD. At this time the ...


    By H2O Innovation

  • Increased plant efficiency, City of Checotah, Oklahoma

    The City of Checotah, Oklahoma was experiencing excessive solids, foam and grease in their 0.5 MGD extended aeration activated sludge treatment facility. With a daily average flow of 0.25 million gallons per day, the plant had tremendous amounts of foam and grease in the aeration basin with the sidewalls caked with sludge. The centerwells of the clarifier were filled with foam and grease. The ...


    By Byo-Gon, Inc.

  • Novel Approach to Storm Water Management for BNR Facilities

    ABSTRACTOne of the major challenges faced by most wastewater treatment facilities today is the need to develop and operate a sound and responsive storm water management program in the absence of an assured and adequate source of funding. This paper will discuss various strategies, such as flow equalization and off-line storage of MLSS, which could be implemented to mitigate the negative impact of ...

  • Safety corner - Ergonomic considerations for the wastewater treatment plant

    If you have ever had your golf swing assessed or changed the height on your desk chair, you have had an ergonomic experience. Ergonomics is an assessment of work spaces to reduce physical injury produced by repetitive job requirements. Ergonomics considerations cross every work type, from golf pros to lab technicians. Review of body mechanics while performing a job, with options of change to ...


    By GillTrading.com, Inc.

  • Decentralized Sewage Manila, Philippines - Case Study

    Situation A large urban water authority in the Philippines wanted to reduce power consumption and treat sewage for environmentally friendly discharge to nearby water ways. Solution Four BioGill bioreactors were retrofitted to the existing decentralized Sewage Treatment Plant (STP). Design The modified process saw the aeration ...


    By BioGill Operations Pty Ltd

  • Project WWTP Sint Maarten - Case Study

    Sewage Treatment Plant "Illidge Road" located at Sint Maarten, Netherlands Antilles, is being renewed. The exisiting plant is expanded in order to accommodate the growing number of households. The old plant was built in 1992 with a capacity for 3,500 resident equivalents. After the expansion, the plant will have a capacity of 30,000 resident equivalents, meaning that it will be able to serve ...


    By Landustrie Sneek BV

  • An innovative design for an effluent treatment plant case study

    A well-known cereal manufacturer has a production plant that produces coated cereals. The production process results in a high level of COD being discharged to the waste stream. For both environmental and economic reasons they needed to reduce the strength of this effluent. Cleveland Biotech Ltd were asked to advise on possible solutions to this effluent problem. A meeting took place in February ...


    By Cleveland Biotech Ltd.

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