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TITLE Development of denitrification technology using solid hydrogen donors for wastewater from petroleum refinery plants
(Joint Program to Promote Technological Development with the Private Sectors)
in Matsushita Industrial Information Equipment Co., Ltd.

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.