关键词: 体光源, 体相光催化, 青霉素废水, 农药废水

Abstract:

In order to intensify photo-catalytic process for treatment of industrial wastewater, a new packed-source photo-catalytic reactor (PSPR）that is a glass reactor in which many small balls involving microwave electrodeless discharge lamp (MEDL）are packed, is put forward.Its performance was evaluated by photo-degradation of methyl orange and 2,4-dichlorophenoxyacetic acid in aqueous solution, and its coupling effect between heat produced by microwave and MEDL and photo-catalysis in degradating wastewater was studied by treating 10% ethanol solution and penicillin wastewater containing organic solvents(butyl alcohol and butyl acetate).The experimental results indicated that not only more than 3 times degradation efficiency was performed compared with the conventional photo-reactor with UV lamp, and 83.9% COD_Cr could be removed in PSPR for the pesticide wastewaters containing 2,4-dichlorophenoxyacetic acid, but also the solvent could be recovered by the coupling effect, 100% for butyl acetate.So, the new photocatalytic system can not only intensify photo-degradation of organic pollutants, but also separate and recover organic solvents from wastewater using heat from microwave and MEDL.The development of PSPR is an integration of microwave energy, photo-catalysis and heat effect, and is of the importance in industrial application for treatment of organic wastewater.

Key words: 体光源, 体相光催化, 青霉素废水, 农药废水