pond design Articles

  • Performance of modified design pond sand filters

    Two pond sand filters (PSFs) with modified design were constructed in Pathorghata Upazila of Barguna District located in southern Bangladesh. Performance assessment of the PSFs was done after commissioning in terms of quality of filtered water, ease of operation and maintenance, monthly check-up of production capacity/efficiency of the filters, users' participation and acceptability of the ...


    By IWA Publishing

  • Taking wind into account in the design of waste stabilisation ponds

    Up to now, most investigations on the dependency of the fluid flow patterns and performance of waste stabilisation ponds (WSPs) on wind speed and direction and pond layout have been performed using 2D and 3D CFD steady state isothermal models. 3D non steady state models integrating thermal processes and boundary conditions taking into account the full influence of meteorological factors are ...


    By IWA Publishing

  • Oxygen, the fix for pond problems

    Aeration of a water feature should have three main considerations. These include preventing thermal stratification, balancing the dissolved oxygen levels throughout the water column from the sludge or benthic layer to the surface and balancing temperature levels throughout the water column. Although oxygen transfer from certain methods may be significant, the greatest amount of oxygenation takes ...


    By EP Aeration

  • Waste Stabilization Ponds and Constructed Wetlands - Design Manual, 2005

    The design manual for waste stabilization ponds and constructed wetlands presented in this CD ROM gives a comprehensive technical information about their planning, design and operation. Also a number of numerical models are included to assist in finding the size of a constructed wetland or stabilization pond, reduce the concentration of heavy metals, phosphorous and nitrogen amongst other ...


    By IWA Publishing

  • Industrial Pond Treatment

    This small municipality was experiencing difficulty in maintaining dissolved oxygen levels in their industrial ponds. During the processing season, they were receiving 3MGD of industrial wastewater from tomato and green pepper processors. During the previous season, they had been out of compliance on numerous occasions and received several complaints from the public concerning odor from the ...


    By Integrated Engineers Inc.

  • The Advantages of a Box Welded Pond Liner

    There’s no time like the New Year for good intentions – and one which will pay dividends for many years to come is to create a garden pond. One of the first choices you’ll have to make is the type of liner to use. The material itself is a no-brainer – always use a synthetic rubber liner rather than polythene; synthetic rubbers are much tougher and longer lasting than the ...


    By Russetts Development Ltd

  • Considerations for test design to accommodate energy‐budget models in ecotoxicology: A case study for acetone in the pond snail Lymnaea stagnalis

    Toxicokinetic–toxicodynamic (TKTD) modeling offers many advantages in the analysis of ecotoxicity test data. Calibration of TKTD models, however, places different demands on test design compared with classical concentration–response approaches. In the present study, useful complementary information is provided regarding test design for TKTD modeling. A case study is presented for the pond ...


    By John Wiley & Sons, Ltd.

  • UASB-polishing ponds design parameters: contributions from a pilot scale study in southeast Brazil

    This paper presents the results of five years monitoring of an experimental wastewater treatment plant in southeast Brazil, comprised of a UASB reactor followed by a submerged aerated biofilter (BF) (field scale) and shallow polishing ponds (pilot scale). Three ponds in series achieved high quality effluent standards in terms of ammonia and E.coli, but a fourth pond did not result in further ...


    By IWA Publishing

  • Assessment of classical surface organic loading design equations based on the actual performance of primary and secondary facultative ponds

    This article presents results from a performance evaluation of 73 full-scale primary facultative ponds and 37 secondary facultative ponds in Brazil. The data were used to test the applicability of some classical design equations for recommended surface BOD loading rates. The empirical equations proposed by Mara in 1976 and 1987 and the equation developed by McGarry and Pescod in 1970 were ...


    By IWA Publishing

  • Effect of baffles on the hydraulic performance of sediment retention ponds

    An investigation of the effect of baffles on retention pond performance using a physical model of an existing sediment retention pond is presented. Analysis of residence time (RTD curves) was used to compare the hydraulic performance of different arrangements of baffles in the pond. Five different arrangements for the design of baffles were studied. The results show that placing a single ...


    By IWA Publishing

  • Duck Pond Cellars (Lagoon Cleanout) - Case Study

    TenCate develops and produces materials that function to increase performance, reduce costs, and deliver measurable results by working with our customers to provide advanced solutions. THE CHALLENGE Wineries around the world utilize waste lagoons to deposit the waste products from the wine making process.  This includes the pulpy residue, known as "pomace", and the ...

  • How do you clean a stormwater management pond?

    How do you clean a stormwater management pond (SMWP) without draining the pond first? A clean-out of the SWMP is required once every 5-15 years to remove accumulated sediments to ensure the pond continues to function as intended. Drainage of the SWMP is not always required to facilitate the clean-out. By combining the pumping and excavation into one process! New pumping technology - Dragflow ...


    By Aquatech Dewatering Company

  • Benefits of a BaySaver Separation System for Wet Pond Pretreatment

    There are instances when a BaySaver Separation System may be used as a pretreatment device for a wet pond; when environmental regulations require it; or when a stand alone physical separator is not enough to meet an 80% removal efficiency using solely this product. There are cost benefits associated with using BaySaver products in conjunction with other Best Management Practices (BMPs). In the ...


    By BaySaver Technologies, Inc.

  • Managing Ponds for BOD Reduction and Odor Control

    A large number of food processors utilize ponds to treat their wastewater. Most of the time these ponds are aerobic in which they use oxygen to degrade the wastewater biological oxygen demand (BOD). Fruit and vegetables contain a high amount of simple sugars and other organic compounds that when exposed to water are released into the water stream. These organic compounds require oxygen to degrade ...


    By Integrated Engineers Inc.

  • How to fit a box-welded pond liner for a perfect water feature

    Box-welded pond liners are also commonly referred to as tailored-to-fit, bespoke, made-to-measure or tailor-made pond liners. All terms are recognised by professional landscapers and by pond liner manufacturers. Suited to formal pond designs, a box-welded pond liner provides the best fit with no unsightly seams or folds. A ...


    By Russetts Development Ltd

  • Calibration of a simple model for waste stabilisation pond performance in seasonal climates

    The paper describes the calibration of a model for waste stabilisation pond (WSP) performance in seasonal climates, based on the use of readily available climate data sets. Calibration data were taken from a wide geographical area of Canada and the USA, including coastal and moderately seasonal sites. Good agreement with measured values was shown using a biochemical oxygen demand (BOD) decay ...


    By IWA Publishing

  • Syncrude oilsands tailings pond, Ft. McMurray, Alberta, Canada - Case Study

    Syncrude Canada produces a large part of Canada's crude oil supply. The company processes about 225,000 bbl/day. The oil produced is used for jet and automobile fuel, home heating oil, plastics and other consumer synthetics. Crude oil is produced through a process of mining, extracting and upgrading bitumen. A rich supply of bitumen is contained in the Athabasca oil sands deposit in northern ...


    By Presto Geosystems

  • Dissolved air flotation (DAF) for biomass recovery from algal ponds

    This work evaluated the performance of a dissolved air flotation (DAF) system for biomass recovery from the effluent of algal ponds used for sewage treatment in Northeast Brazil. Two different coagulants and effluent samples were tested following a random-factor experimental design (34–1–4 factors and 3 levels), in triplicate. Factor analysis showed that coagulant dose was the most important ...


    By IWA Publishing

  • Ecology of duckweed ponds used for nutrient recovery from wastewater

    The microorganism community that grows under duckweed shelter can play an important role on treatment processes. Therefore, the present study aimed to assess the zooplankton dynamic and microbial community in duckweed ponds (DPs) applied for domestic wastewater treatment under open field conditions. A pilot system comprised of two DPs in series (DP1 and DP2), with 10 m2 each, received domestic ...


    By IWA Publishing

  • Effects of road deicer (NACL) and amphibian grazers on detritus processing in pond mesocosms

    Road deicers have been identified as potential stressors in aquatic habitats throughout the United States and we know little regarding associated impacts to ecosystem function. A critical component of ecosystem function that has not previously been evaluated with respect to freshwater salinization is the impact on organic matter breakdown. The purpose of this study was to evaluate cumulative ...


    By John Wiley & Sons, Ltd.

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