baffle system Articles

  • Experimental study of a novel hybrid constructed wetland for water reuse and its application in Southern China

    A new type of hybrid constructed wetland (CW), consisting of both vertical-baffled flow wetland (VBFW) and horizontal subsurface flow wetland (HSFW), has been deployed in Southern China to naturally accelerate the removal of organic matter and nitrogen. The hybrid CW system is characterised by a combination of continuous baffled flow vertical wetland and ‘S’ pattern horizontal subsurface flow ...


    By IWA Publishing

  • Modeling settling tanks for water treatment using computational fluid dynamics

    A computational fluid dynamics model is presented for the calculation of the flow, suspended solids, and tracer concentration fields in the settling tanks of the water treatment plant of Aharnes, an important component of the water supply system of the greater area of Athens, Greece. The model is applied to investigate the expected negative effect of the wind on the hydraulic and settling ...


    By IWA Publishing

  • Evaluation of DEWATS in Java, Indonesia

    Under the Indonesian PPSP (Accelerated Sanitation Development for Human Settlements Program) thousands of new DEWATS (Decentralized Wastewater Treatment Systems) may be realized in the coming five years. Taking the massive scale of planned implementation into consideration an evaluation of the technical and financial-economic aspects and users' involvement for three different types of ...


    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 ...

  • Mastertaste Savors the Benefits of Cost-Effective Odor Control

    The aromas from savory flavors are detectable even at low concentrations, and pose special challenges for companies who manufacture or use them.    Mastertaste, (Clark, N.J.) a Division of Kerry Group plc, is a leader in the development and production of savory flavors and blended seasonings.  As part of a plant expansion, Mastertaste needed a system to eliminate odors from ...


    By Tri-Mer Corporation

  • Flexible engineering designs for urban water management in Lusaka, Zambia

    Urban water systems are often designed using deterministic single values as design parameters. Subsequently the different design alternatives are compared using a discounted cash flow analysis that assumes that all parameters remain as-predicted for the entire project period. In reality the future is unknown and at best a possible range of values for design parameters can be estimated. A Monte ...


    By IWA Publishing

  • SKIKDA WWTP Project - Case Study

    Customer: OTV France Sud (France) Project Name: SKIKDA WWTP Manufacturing year: 2008 Scope of supply 1 pcs. Ø 10 m Degazeur Tank Central Driven Surface Scrapers (with Weirs, Baffles and Scum Hoppers); Dry ...


    By ASTIM A.S.

  • OTV France SUD Project (France) - Case Study

    Customer: OTV France Sud (France) Project Name: ...... Manufacturing year: 2009 Scope of supply 4 pcs. Cable Operated ...


    By ASTIM A.S.

  • Long-term performance of side-stream deammonification in a continuous flow granular-activated sludge process for nitrogen removal from high ammonium wastewater

    An innovative granular sludge deammonification system was incorporated into a conventional-activated sludge process. The process incorporated an internal baffle in the bioreactor for continuous separation of granular biomass from flocculent biomass, which allowed for controlling the solids retention time of flocculent sludge. The process was evaluated for ammonium removal from municipal digested ...


    By IWA Publishing

  • Tracer studies on an aerated lagoon

    The city of Palmerston North, New Zealand, has two aerated lagoons as its secondary treatment facility. Interest about treatment efficiency led to an investigation into the hydraulics in the second lagoon to determine if further optimisation was viable. A tracer study using rhodamine WT was undertaken to ascertain the stimulus response output. Samples were also taken at 24 points within the ...


    By IWA Publishing

  • Use of horizontal flow roughing filtration in drinking water treatment

    In order to evaluate the feasibility of implementation of horizontal-flow roughing filtration for drinking water treatment a pilot was designed and run at the bank of Zayandehroud river near the village of Chamkhalifeh. Pilot running was performed in summer 2003 (July, August and September), when the quality of river water was in relatively worst condition. The filter is comprised from three ...

  • Operation of a solids contact tank at low dissolved oxygen and low total suspended solids concentrations

    Solids retention time (SRT) and dissolved oxygen concentration (DO) set points were optimized at a 32 MGD trickling filter-solids contact tank system. OPTImasterTM on-line optimization software was used for set points selection. Set points were maintained automatically using SRTmaster and DOmaster - sludge age and dissolved oxygen automatic control systems. Referenced above biological system was ...

  • Sequencing batch reactor

    Sequencing batch reactors (SBR) sequential batch reactors are industrial processing tanks for the treatment of wastewater. SBR reactors treat waste water such as sewage or output from anaerobic digesters or mechanical biological treatment facilities in batches. Oxygen is bubbled through the waste water to reduce biochemical oxygen demand (BOD) and chemical oxygen demand (COD) to make suitable for ...


    By IWA Publishing

  • Sequencing batch reactor

    Sequencing batch reactors (SBR) or sequential batch reactors are industrial processing tanks for the treatment of wastewater. SBR reactors treat waste water such as sewage or output from anaerobic digesters or mechanical biological treatment facilities in batches. Oxygen is bubbled through the waste water to reduce biochemical oxygen demand (BOD) and chemical oxygen demand (COD) to make suitable ...


    By IWA Publishing

  • What Do Wet Dust Collectors Do?

    Wet dust collectors are ideal for many operations, which include scrubbing, washing, and obscuring the pollutant out of the air and collecting it as a wet slush. Wet dust collectors come in various shapes and sizes, which mean you will always have a wide range to browse through, before you treat your business to this necessary, luxury device. These are ideal systems for many industries and ...


    By ProVent, LLC

  • What Do Wet Dust Collectors Do?

    Wet dust collectors are ideal for many operations, which include scrubbing, washing, and obscuring the pollutant out of the air and collecting it as a wet slush. Wet dust collectors come in various shapes and sizes, which mean you will always have a wide range to browse through, before you treat your business to this ...


    By ProVent, LLC

  • Retention and distribution of Cu, Pb, Cr, and Zn in a full-scale hybrid constructed wetland receiving municipal sewage

    This study was conducted to investigate the retention and distribution of Cu, Pb, Cr, and Zn in a hybrid constructed wetland (CW) that consists of both vertical baffled flow wetlands (VBFWs) and horizontal subsurface flow wetlands (HSSFs) with unique flow regimes and oxygen distribution. The heavy metal concentrations in water, sediments, and plant tissues in the hybrid CW were analysed. The ...


    By IWA Publishing

  • CFD predicitons in large mechanically aerated lagoons

    Optimization of the design and operation of large (>500,000 m3) mechanically aerated wastewater treatment lagoons (known as Aerated Stabilization Basins or ASBs) requires a thorough understanding of both the hydraulic and biological processes within the treatment volume. Complex three-dimensional flows existing within these lagoons are difficult to quantify by measurement or simplified analyses, ...

  • Chemical Industry: Silicon Tetrachloride Fume Problem Solved Ccase Study

    A two-stage Jet-Venturi scrubber/packed tower system solved a number of pollution problems for an Albany, Oregon, company. The Zirconium Extraction Div. of Teledyne Wah Chang produces highquality reactor-grade zirconium and hafnium ozide using a chemical separation process. The zirconium and the hafnium are chlorinated and then formed into pure metals for the nuclear and chemical process ...


    By CR Clean Air Group, LLC

  • Sarakasi Theatre - room acoustical measurements and modelling

    Measuring Reverberation Time and Speech Intelligibility using Balloons and an MP3 Player as External Sound Sources The non-profit organisation Sarakasi Trust owns a theatre in Nairobi Kenya, inside the former Shan Cinema. In this theatre, youths from the city slums are trained to be acrobats, so that they learn how to make a living without having to resort to crime. Shows and concerts are ...

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