Clarifiers Articles

  • 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

  • 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 ...

  • 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

  • Ovivo Double Entry Drum Screens at Yellow River WRF, Gwinnett County, GA – Customer Testimonial

    “We completed the Yellow River WRF Improvements Project in 2012. This project replaced an aging 14.0 MGD conventional activated sludge facility with an advanced 22.0 MGD MBR facility. The MBR facility includes third party submerged fiber membrane for solids separation. The membrane manufacturer required, at a minimum, 2mm screening to protect the .04 micron membrane. We decided to purchase ...

  • 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 ...

  • Rainwater tanks in modern cities: a review of current practices and research

    Rainwater tanks often provide a reliable and affordable water supply source in rural and remote areas where piped water supply systems are unfeasible due to economic considerations. However, over recent decades there has been an increase in the adoption of rainwater harvesting as part of the water supply source mix in modern cities. The uptake of rainwater harvesting has been influenced by the ...


    By IWA Publishing

  • Montemorelos wastewater plant case study

    Performance History and Discussion In-Pipe Technology Company, Inc. was selected with goals to improve the biological treatment capacity at the wastewater treatment plant (WWTP) without capital expansion of the current facility. Due to the inability to make a capital investment to expand unit operations and processes, a municipal treatment plant in Montemorelos can not meet the needs of a ...

  • Homestead village case study

    Performance History and Discussion The wastewater treatment facility for the Homestead Village apartment community treats about 115,000 gallons per day of wastewater for discharge into onsite infiltration lagoons. The facility is required to remove nitrogen from the wastewater to less than 10 mg/L before discharging into the ground. The facility struggled to consistently meet this ...

  • Rivers and reciprocity: perceptions and policy on international watercourses

    The paper analyses geopolitical dimensions of the 1997 United Nations Convention on the Law of the Non-Navigational Uses of International Watercourses (UNWC) using quantitative data on transboundary flows and qualitative data on basin State location within a watercourse. The UNWC has had a long and difficult history. A tendency for downstream support for, and upstream ambivalence/opposition ...


    By IWA Publishing

  • Arguments for involving the public in water management: evidence from local and regional water plans in the Netherlands

    Public participation has become increasingly important in the water sector. However, the question remains as to what exactly is meant by participation. This paper explores the different ways that participation is understood in local and regional water plans and visions in the Dutch water sector. Partly driven by the key role played by participatory water management under the European Water ...


    By IWA Publishing

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