Rob
Joined: 18 Sep 2008
Posts: 7
Location: Greater Wellington Regional Council
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 Posted: Wed Nov 18, 2009 8:16 am Post subject: CO2 emissions factor for water treatment chemicals |
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I want to calculate the carbon dioxide emissions savings from reducing chemical use after implementing a feed forward dosing control system.
I'm trying to find benchmark emissions factor figures for the manufacture of water treatment chemicals (kg CO2 per kg chemical). I thought that maybe someone's looked at this already. Obviously it would be good to find a published figure.
At present I'm particularly interested in alum and PACl as they're the main ones affected by the change that I don't have numbers for.
I've got this far...
* I’ve calculated a theoretical value for sodium hydroxide seeing as it's more or less the same process as is used for hypochlorite generation. This has also given me a number for chlorine gas (and hypochlorite).
* There are published MfE figures for hydrated/burn lime (http://www.mfe.govt.nz/publications/climate/greenhouse-gas-inventory-2009/).
* It seems sensible to treat CO2 dosing as neutral seeing as it is a byproduct of other processes.
* I have numbers for transportation by ship, truck, etc.
Any ideas? Cheers.
Rob |
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