Pretreatment of aluminium alloy milling wastewater by micro-electrolysis process. Issue 3 (May 2019)

• Record Type: Journal Article
• Authors: Li, Ru; Huang, Xin; Gu, Junli
• Is Part Of: IOP conference series. Volume 267:Issue 3(2019)
• Publication Date: 2019-05
• Subjects: Earth sciences -- Periodicals; Environmental sciences -- Congresses; Environmental sciences -- Periodicals; 550.5
• DOI: 10.1088/1755-1315/267/3/032086
• Languages: English
• ISSNs: 1755-1307

Abstract

Abstract: The aluminium alloy milling wastewater belongs to high concentration organic alkaline wastewater, the pH value is up to 13-14, and the COD concentration is 3000mg/L-3300mg/L, if direct discharge into water bodies without harmless treatment can seriously endanger the ecological environment and human health. In this study, the micro-electrolysis process was used to pre-treat the aluminium alloy milling wastewater, and the COD removal rate was the indicator. Under the condition that the mass ratio of iron to carbon is 1:2, the dosage of iron is 67g/L, the pH is 3, and the reaction time is 60min, the average removal rate of COD in aluminium alloy milling wastewater can reach 71.34%. The kinetic analysis of the process of pre-treatment of aluminium alloy milling wastewater by micro-electrolysis process is in accordance with the first-order kinetic model. The dynamic equation is: C t = C 0 exp ( − 3.5762 C 0 − 0.6351 t ) .