301 促進酸化法による染色排水の処理(下水・廃水処理技術)(大気・水保全技術)

抄録

Advanced Oxidation Processes (AOPs) for the treatment of waste waters containing non-biodegradable organic compounds rely mainly on the production of a potent oxidizing agent, the hydroxyl radical. This paper reports the test results of AOPs with photocatalyst for waste water including non-biodegradable compounds. The mechanism of AOP applied in this work ; 1) UV irradiation against photocatalyst 2) Reduction of Fe^<3+>ion by electron generated from photocatalyst 3) Enhancement of Fenton reaction. Compared to the degradation efficiency for 2,4-dichlorophenol(2,4-DCP) of several AOPs, UV/FeCl_3/H_2O_2 process (Photo-Fenton reaction) and UV/TiO_2/FeCl_3/H_2O_2 process have higher degradation efficiency. Both systems are effective processes for waste water from dyeing industry. These treatments do not require a large amount of Fe salt usually necessary for the Fenton Reaction(Fe^<2+>/H_2O_2). As a result amount of sludge (as Fe(OH)_3) is decreased.