Photocatalytic Degradation of Plasma Display Panel Wastewater

• Main Authors: Kuang-Ling Wang, 王光陵
• Other Authors: Dey-Chyi Sheu
• Format: Others
• Language: en_US
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/89805657678190329759

碩士 === 大同大學 === 生物工程學系(所) === 93 === Wastewaters from the Plasma Display Panel (PDP) plant falls into three categories: heavy metal wastewater, COD wastewater and general wastewater. The COD wastewater had more than 10,000 ppm of COD, in which there were large amounts of non-biodegradable compounds such as resins and those containing phenyl structures. The biodegradability of the COD wastewater was nearly 50-60%. This wastewater may undergo photocatalysis thereby non-biodegradable compounds are preliminarily decomposed, making the biodegradability of the COD wastewater strongly enhanced. The present proposal was engaged in the pretreatment of the PDP wastewater by photocatalysis. The primary photocatalyst used in this study was anatase-form crystalline TiO2 and UVA was used as a light source. Small particles of TiO2 were suspended in the wastewaters consisted of one of the organic compounds including ethyl cellulose, terpineol, acrylic copolymer and 2-butoxyethyl acetate, and were illuminated by UV light under stirred and aerated conditions for various periods of irradiation time. During irradiation the pH and COD of the wastewaters were monitored.