教師資料查詢 | 類別: 期刊論文 | 教師: 陳俊成LUKE CHEN (瀏覽個人網頁)

標題:Characteristics and treatability of oil-bearing wastes from aluminum alloy machining operations
學年96
學期2
出版(發表)日期2008/04/15
作品名稱Characteristics and treatability of oil-bearing wastes from aluminum alloy machining operations
作品名稱(其他語言)
著者Chen, Luke; Hsieh, Chueh-chen; John Wetherbee; Yang, Chen-lu
單位淡江大學水資源及環境工程學系
出版者Amsterdam: Elsevier BV
著錄名稱、卷期、頁數Journal of Hazardous Materials 152(3), pp.1220-1228
摘要Enomoto Industry Co., exclusively uses water-based cutting fluids in its aluminum alloy machining operations. Since the cost of disposal can be much greater than the cost of purchase, the treatability of spent cutting fluids is becoming a major criterion for cutting fluid selection. Samples were collected from the machining lines at Enomoto's facility to determine their characteristics and evaluate their treatability with centrifugation, chemical coagulation and electrochemical coagulation. As expected, oil and grease (O&G) and total suspended solids (TSS) are the main reasons that spent cutting fluids are prohibited from being discharged into local swage systems. The average O&G found in the spent cutting fluids is 87,354 mg/L with TSS of more than 70,000 mg/L. Both O&G and TSS are the major contributors to the high turbidity of these waste effluents. A centrifuge with a relative centrifugal force of 1318 x g, was able to reduce 60% of the turbidity. By adding the coagulant aluminum chloride, the oil-water emulsion was destabilized, and the turbidity was reduced from 3249 Formazin Attenuation Units (FAU) to around 314 FAU. With freshly generated aluminum ions in the spent cutting fluid, the electrochemical process destabilized the oil-water emulsion system. The coalesced oil droplets were adsorbed onto the highly dispersed aluminum coagulant. The oil-rich sludge that was generated in the operation was then floated to the surface, forming a blanket that was removed by skimming. The electrochemical treatment was able to reduce the turbidity to less than 14 FAU, which is the detection limit of the Hach DR/4000 UV-vis spectrophotometer. (c) 2007 Elsevier B.V. All rights reserved.
關鍵字oil and grease; total suspended solids; turbidity; chemical coagulation; electrochemical coagulation
語言英文
ISSN0304-3894
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