Published by Asanka Wimalarathne, Area Manager at Wasser Kraft Tech (SUEZ - Water Technologies & Solutions Channel Partner) in Technology
Please can someone provide advice about a good method to reduce the COD of plastic recycling effluent.
note - the effluent BOD is zero.
Much appreciated
Category: Technology
HI, this is Gokul from Confident engineering India Private Limited,India
We are providing water treatment solution for industries
we are treating water by Electro Coagulation Method
Please feel free to contact me for more details at
+919585548153
Published by Gokul Ragupathi, Marketing and Business Development Executive at Confident Engineering India Private Limited
Dear Mr. Asanka
The detail analysis of effluent is required. You have mention that BOD of effluent from plastic recycling is zero. It means COD is contributed by non biodegradable organic & reducing inorganic chemicals. It means no biological treatment can remove non biodegradable compounds from effluent.
The probable answers are as below.
a. Soluble & colloidal non biodegradable organic compounds – Flocculation, sand Filtration and & activated carbon filtration can give the good result
b. Soluble reducing non biodegradable – Mostly inorganic – RO will be the only alternative.
c. Insoluble / colloidal non biodegradable organic & inorganic – Flocculation, Sedimentation, Sand filtration and Activated carbon filtration.
More alternative can be developed. For details please contact at rvsveipl@gmail.com
Published by Rajendrakumar Saraf
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Published by Julia Woods
Hi at Aerofloat (Australia), we've completed a few projects for plastic recycling companies. Using our patented Aeration and Patented AeroDAF, we recycle the water for the plastic washing process.
A typical process is Sweco Screen > AeroMBBR > AeroDAF > Return to wash plant. This maintains an odourless low TSS wash water, improving the quality of the finished plastic and reducing maintenance on pellet machines.
For Zero BOD, you would require chemical addition to the DAF for improved clarification of MBBR biosolids and fine solids from the washing process, + possible filtration off DAF effluent Sand filter or UF perhaps.
Cheers
Michael
www.aerofloat.com.au
Published by Michael Anderson
Run a series of filtration steps (TSS, membrane, ultra, nano) to see if the COD is due to solids or something that can be treated. Then give us the data on this and the types of plastic recycled and the type of recycling.
Published by Henry Boyter
Let's start with the basics. What is your TSS level? Also look at the level of non-biodegradable oils in your effluent. COD will reduce and measure lots of compounds that BOD bypasses because the BOD test is unreliable at low levels. One of the things which can interfere with the COD test is chlorides. Check your chloride levels and consult the Hach.com website for interference with the COD test. TSS can also give you a high reading on COD but won't show up on BOD.
Published by David Russell, President at Global Environmental Operations, Inc
Bonjour les termes DBO et DCO correspondent à un modèle de traitement des eaux usées domestiques. ils n'ont aucun rapport avec le traitement du plastic qui flottent dans un liquide comprenant de l'eau qui sert uniquement au transport.
La DBO est la demande en oxygène biologique, la DCO est la demande d'oxygène chimique.
Ces deux demandent définissent l'état du milieu liquide et n'ont rien à voir avec la matière en suspension qui n'est pas organique: le plastic.
un process inventé en France élimine le plastic et produit de l'essence
Hello the terms DBO and DCO correspond to a model of domestic wastewater treatment. they have nothing to do with the treatment of plastic that float in a liquid containing water that is only used for transport.
BOD is the demand for biological oxygen, THE DCO is the demand for chemical oxygen.
These two ask define the state of the liquid medium and have nothing to do with suspended matter that is not organic: plastic.
a process invented in France eliminates plastic and produces gasoline
Data provided is sparse, but first of all, try filtration down to low microns, next try activated carbon filtration, or a lime bed (to take out any organic acids that should combine with calcium).
Published by James Stewart
Not enough data. Try filtration through the activated carbon.
Published by Vitalijus Gediminas
Published by Reiner Ulbrich, Innovation in der Wasseraufbereitung - Innovation in water treatment