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- Title
Study on the treatment technology of emulsion wastewater in machining industry.
- Authors
LI Shilei; LI Yanming; HUANG Dan; MA Yongpeng
- Abstract
Taking the emulsion wastewater in a coal machinery processing plant as the research object, the coagulation sedimentation demulsification-Fenton oxidation-ultraviolet light irradiation combined process was used to treat the emulsion wastewater, and the effects of the main factors of the three process on the removal of pollutants were investigated. The results showed that the demulsification effect of emulsion wastewater was better when PAC with a mass fraction of 0.5% and PAM with a mass fraction of 0. 05% were added in the coagulation sedimentation demulsification experiment; the more suitable Fenton oxidation reaction condition were Fenton reagent ratio n(H2O2) : n(FeSO4) = 8:1, 0.815 mol/L FeSO4 dosing amount 8 mL, 30% H2O2 dosing amount 7.41 mL, initial pH of wastewater was 2 ~ 3; When ultraviolet light irradiation worked in synergy with Fenton's reagent, it could effectively improve the removal rate of pollutants in emulsion wastewater. If the reaction was carried out for 0.5 h, the mass concentration of COD and NH4+-N in the wastewater could be reduced to 2.67 x 10-4 g/L and 1.30 x 10-5 g/L, respectively, meeting the emission requirements of enterprises.
- Publication
Journal of Light Industry, 2020, Vol 35, Issue 2, p66
- ISSN
2096-1553
- Publication type
Academic Journal
- DOI
10.12187/2020.02.009