ABSTRACT |
The RITE-Toyonaka Research Laboratory drafted a plan to develop a new denitrification
technology that can cope with the waste from petroleum refinery plants
by controlling the number of carbons in solid fatty acids and using these
fatty acids as both hydrogen donors and the carbon source for denitrifying
bacteria.
In fiscal 2003, we aimed at improving obstructions of the denitrification
-reaction speed, caused by alkaline metals in water, by using solid alcohol
and several esters as hydrogen donors.
We also conducted test operations of cylindrical denitrification experimental
equipment made of transparent polyvinyl chloride (PVC) of 600 mm in diameter
and 2350 mm in height, and by performing a continuous water supply test,
we obtained various data needed for practical application.
As the results of above, we have successfully obstructed the reactions
between carboxyl acids and alkaline metals by using solid alcohol as hydrogen
donors.
And according to the needed hydrogen load dissolved organic carbon could
be controlled by selecting ester combinations as hydrogen donors.
On the other hand, the ingredient of phenol in waste water didn't cause
of controlling denitrification reaction. But undecomposed phenol as total
organic carbon (TOC) might be problem for practical use.
We will try to apply small scale waste water treatment at first.
As future targets, we also try recalculating treatment and swage water
treatments considering market movements, regulation directions.
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