baffle system Articles

  • The Monclova experience case study

    The Town of Monclova, Mexico found it necessary to increase the hydraulic capacity of its municipal wastewater treatment plant by 35% – from approximately 11.5 MGD to 15.5 MGD. The increase in flow was accomplished by upgrading the plant’s biological treatment process. Once the modifications were completed, the flow through the plant was gradually increased. As the increased flow ...


    By NEFCO, Inc.

  • 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.

  • Does Chlorine Contact Tank Mixing Reduce Detention Time and THM Formation?

    Water and wastewater utilities can account for nearly 40 percent of a small city's energy use. By more efficiently managing its energy use, a community can significantly affect operational costs and improve its financial sustainability. Proper mixing increases detention time by adding a vertical plug-flow element to the flow of water through a chlorine contact tank. The increased detention time ...


    By Medora Corporation

  • 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

  • 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 ...

  • 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

  • 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 ...

  • THM Removal in Two 300,000 Gallon clearwells - Case study

    Greater than 60% THM reduction observed Topics: clearwell, certified tests, chlorine, trihalomethane reduction, stratification System Overview: Water flows in series through Clearwell #1 to # 2, then onto distribution. Tank / Reservoir Build Information: Tank Type: Two (2) Identical, Cylindrical, ...


    By Medora Corporation

  • 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

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