www.OxidationDitches.com
A Primer on Oxidation Ditches | Fundamentals & Applications
Introduction
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A Primer on Oxidation Ditches | Fundamentals & Applications |
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Introduction |
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Suspended growth
or activated sludge-based systems such as oxidation ditches
typically consist of some type of pretreatment followed by a large,
racetrack-like aerated basin and a final solids separation unit. The
purpose of pretreatment is to remove large suspended solids than can
interfere with the mechanical features in biological treatment equipment
or to reduce the organic load reaching the aeration basin. To a
certain extent this arrangement may be the simplest configuration, i.e. a single-sludge
design.
Numerous
variations have been used for treating industrial as well as municipal
wastewaters. Over the years activated sludge variants
such as oxidation ditches have successfully expanded their scope to
incorporate biological nutrient removal (BNR). Ages
ago stripping could have been seen as appropriate for ammonia removal -
not anymore. Similarly outdated, a number of engineers
may prefer to remove P with chemicals because it is very predictable and
they don't have a good understanding of biological phosphorus removal (BPR).
Actually, BPR is just as easy and just as predictable, and you don't have
to deal with sludges that contain a lot of chemical. The BPR approach
makes more sense environmentally and from an engineering standpoint. You
simply need an anaerobic activated sludge zone where the influent
wastewater enters the system, i.e. a separate compartment or zone.
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www.AerationFundamentals.com - www.ExtendedAeration.com - www.OxidationDitches.com - www.TricklingFilters.com |
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www.Biotowers.com - www.MembraneBioreactors.com - www.AnaerobicReactors.com - www.AnaerobicFilters.com |
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www.UASBs.com - www.EGSBs.com - www.CoolingTowerFundamentals.com - www.EvaporativeCondensers.com |
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www.DewateringFundamentals.com - www.BioremediationFundamentals.com - www.IncinerationFundamentals.com |
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Questions?? Send
us e-mail: 
frontdesk@engineer.com |
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p.d.: Lab flask images courtesy of www.EnviTreat.com
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