Clarifiers Articles

  • Separating micro pollutants by an innovative membrane process.

    Combined adsorption of micro pollutants on activated carbon and membrane filtration of MICRODYN-NADIR has proven an alternative to the established activated carbon/precipitation/sand filtration process. Contamination of the environment by micro pollutants has clearly been proved by now. Due to the high concentration of microorganisms and the contamination by antibiotics coming from animal ...


    By MICRODYN-NADIR GmbH

  • Case study - Hadleys

    Material Source: Excavation waste from construction sites.  Equipment Installed: Main components included: Commander 1400 Hopper Feed Conveyor 16 x 5 Rinsing Screen Logwasher c/ with Dewatering Screens Finesmaster 120 Sand Plant 16 x 5 Dry Screen Bivitec Pre- Screen System ...


    By DUO (Europe) plc

  • Case study - Nottinghamshire Recycling

    DUO Equipment delivered and installed a new full washing and water management plant for Nottinghamshire Recycling Ltd (NRL). Based in Worksop, Nottinghamshire, NRL is a sustainable waste solution provider processing C & D waste, green waste, wood and recycled aggregates. The new washing and water management plant (which includes a Gennaretti centrifuge system) will provide NRL with the ...


    By DUO (Europe) plc

  • Chemically enhancing primary clarifiers: model-based development of a dosing controller and full-scale implementation

    Chemically enhanced primary treatment (CEPT) can be used to mitigate the adverse effect of wet weather flow on wastewater treatment processes. In particular, it can reduce the particulate pollution load to subsequent secondary unit processes, such as biofiltration, which may suffer from clogging by an overload of particulate matter. In this paper, a simple primary clarifier model able to take ...


    By IWA Publishing

  • Keeping Tanks Online and Divers Out of the Water

    Huntley’s Sub Aqua Construction brings piece of mind to customers with regular and efficient mini remotely operated vehicle inspections Huntley’s Sub Aqua Construction (HSAC) is a commercial diving company based in Kentville, Nova Scotia, Canada. Operating since 1994, HSAC recently added a Deep Trekker mini remotely operated vehicle (ROV) to their team to improve potable water ...


    By Deep Trekker Inc.

  • Controlling Sludge in Lamella Clarifiers

    This month we are focusing on the control of sludge blanket build up in Lamella Clarifiers. Lamella Clarifiers, also known as Inclined Plate Separators (IPS) are in common use at Waste Water Treatment Sites as small footprint plant settlement units and are often employed in ...


    By Partech (Electronics) Ltd.

  • Good Advice for Winter Travel

    No Nonsense Safety during the Season of Slip-ups As many will be aware from unfortunate experience and bad news, Winter can be a very dangerous time for roads and footpaths. A multitude of risks threaten life and limb; aside from snow and ice, falling leaves mixed with wet weather are a recipe for slippery surfaces, while damp mud is another serious problem exacerbated by tractor ...


    By SHEilds Ltd

  • Antifreeze Liquid Production: Start Your Own Business

    In some areas the cold period can last for up to eight months. Sub-zero temperatures are recorded even in October. This fact makes a small antifreeze production business quite promising. Why do we need non-freezing liquids? One important area of antifreeze liquid us is cleaning of car windscreens (windscreen cleaners). Another is cooling of the ...


    By GlobeCore GmbH

  • Wash Water Questions and Answers

    When the subject of Wash Water Recycling comes up there are many questions that can arise. The following are a few that are frequently asked are: Will it have an odor? What will its’ clarity be? How much is recycled? The above questions seem very basic but can at times create a complex response because of ...


    By ESD Waste2Water, Inc.

  • An assessment of static and dynamic models to predict water treatment works performance

    The relative accuracy of static and dynamic water treatment works (WTWs) models was examined. Case study data from an operational works were used to calibrate and verify these models. It was found that dynamic clarification, filtration and disinfection models were more accurate than static models at predicting the final water quality of an operational site but that the root mean square errors ...


    By IWA Publishing

  • Glyphosate and AMPA in drinking water

    Carcinogenic or not? The broad-spectrum herbicide glyphosate is used all over the world in agriculture. Alongside farming, the chemical is also used for weed-killing in domestic gardens and in public and private spaces kept free from «vegetal invasion», such as railway tracks. Glyphosate has been used since the 1970s in pesticides and was hitherto thought to be harmless at ...


    By Metrohm AG

  • Grana-Localized Proteins, RIQ1 and RIQ2, Affect the Organization of Light-Harvesting Complex II and Grana Stacking in Arabidopsis

    Abstract Grana are stacked thylakoid membrane structures in land plants that contain photosystem II (PSII) and light-harvesting complex II proteins (LHCIIs). We isolated two Arabidopsis mutants, reduced induction of non-photochemical quenching (riq1 and riq2), in which stacking of grana was enhanced. The curvature thylakoid 1a curt1a) mutant was previously shown to lack grana structure. ...


    By H Smith Plastics LTD

  • The design and installation of the gas collection system

    The designer of gas collection plants has the task to fulfill optimally the important criteria: stability of gas quality efficiency of collection economic viability of the plant The stabilisation of the gas quality helps to solve the problem between the uneven gas production of the landfill on the one side and ...


    By Hofstetter BV

  • Case study - Algae control in SAB Miller Clarifier

    Several LG Sonic e-line devices were installed in the SAB Miller Clarifier #1 in Tocancipa Brewery, Colombia in order to control filamentous algae. The LG Sonic e-line devices were installed in the summer of 2012.   The Challenge: Control Algae and Increase Process Efficiency In the summer of 2012, SAB Miller, Colombia contacted LG Sonic in order to provide a solution ...


    By LG Sonic

  • An evaluation of sampling methods and supporting techniques for tackling lead in drinking water in Alberta Province

    A demonstration project evaluated a range of sampling methods and supporting techniques for tackling lead in drinking water in Alberta Province, with the cities of Calgary and Edmonton as case studies. The sampling protocols specified by Health Canada in their 2009 guidance were confirmed to need further improvement and clarification; these sampling protocols produce results that are subject ...


    By IWA Publishing

  • Application of recycled sludge to stabilize coagulation process

    In conventional treatment of variable quality mountain water, an inability to immediately adjust the coagulant dose to variations in water quality causes overdose or underdose of coagulant in relation to its optimal value. The results of the research showed that the reuse of post-coagulation sludge was an effective method to maintain high and stable coagulation effectiveness under both ...


    By IWA Publishing

  • Clarifier maintenance

    Clarifiers are expensive, to buy or repair, and their downtime can be costly in fines imposed by regulatory agencies and in community ill will. Regular maintenance, an annual inspection of the mechanism and an occasional touchup of the paint or coating system are simple and inexpensive proactive steps that will usually prevent most problems. Three components of all clarifiers require maintenance: ...


    By WesTech Engineering, Inc.

  • Characterizing shallow secondary clarifier performance where conventional flux theory over-estimates allowable solids loading rate

    The performance characteristics of relatively shallow (3.3 and 3.7 m sidewater depth in 30.5 m diameter) activated sludge secondary clarifiers were extensively evaluated during a 2-year testing program at the City of Akron Water Reclamation Facility (WRF), Ohio, USA. Testing included hydraulic and solids loading stress tests, and measurement of sludge characteristics (zone settling velocity ...


    By IWA Publishing

  • OSU Researchers Deploy Stevens Equipment in Study of Green Infrastructure Treatment for Groundwater Runoff

    Stormwater runoff pollution is a serious issue that faces almost every urban and suburban environment. In older city infrastructure, runoff from roofs, parking lots, and streets flows directly into the sewer system and must be handled by the municipal wastewater treatment facility, increasing the amount of work the system must undertake. For the past 30 years, the infrastructure for stormwater ...

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