期刊
DESALINATION AND WATER TREATMENT
卷 286, 期 -, 页码 81-89出版社
DESALINATION PUBL
DOI: 10.5004/dwt.2023.29302
关键词
Chemical oxygen demand removal; Color removal; Paint industry wastewater; Poly-aluminum-chloride-sulfate; Taguchi method
In this study, the coagulation-flocculation method with PACS was used to pre-treat PIWW. Independent parameters, including pH, centrifugation time, revolutions per minute, and PACS dose, were varied at different levels to determine their effects on the removal efficiencies of COD and color. The results showed that PACS can be used as a pre-treatment process for PIWW treatment.
In this study, coagulation-flocculation method with poly-aluminum-chloride-sulfate (PACS) was used to pre-treat paint industry wastewater (PIWW). The pH, centrifugation time, revolutions per minute and PACS dose were selected as independent parameters for an experimental design employ- ing Taguchi orthogonal arrays. These independent parameters were varied at four different levels (pH: 5, 6, 7 and 8; centrifugation time: 1, 2, 3 and 4 min; revolutions per minute: 1,000; 2,000; 3,000 and 4,000 rpm; and PACS doses: 1, 2, 3, and 4 mg/L) to determine their effects on the removal effi- ciencies of selected dependent parameters. Chemical oxygen demand (COD) and color were selected as the dependent parameters and analyzed at the beginning and end of each batch experiment. The maximum removal efficiencies of COD and color were found to be 37% (for 3-3-1-2 levels) and 89% (for 4-1-4-2 levels), respectively. According to the Taguchi method, the contributions to COD removal performance of PACS dose, pH, revolution per minute and centrifugation time to be 33.09%, 37.39%, 3.76% and 13.42%, respectively. On the other hand, the contributions to color removal per- formance of PACS dose, pH, revolution per minute and centrifugation time to be 3.75%, 86.97%, 3.75% and 4.25%, respectively. According to obtaining results, PACS can be used as a pre-treatment process for PIWW treatment.
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