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The cosmetics industry has been growing steadily for the past several years in China, yet very few researches exist on cosmetic wastewater treatment system. This study gave new insight to develop a combined anaerobic baffled reactor (ABR) and upflow biological aerated filter (UBAF) system for the treatment of cosmetic wastewater. The chemical oxygen demand (COD) removal efficiency in the cosmetic wastewater was mainly investigated in the front two compartments of ABR reactor, while it was treated by the same reactor with six compartments. When the influent COD load was set at 1.5g COD/L.d, the COD removal efficiency reached a maximum in the No. 1 compartment. The highest COD removal efficiency achieved 2.0g COD/L.d for the complete ABR reactor. The optimal hydraulic retention time (HRT) of the ABR was 48 h. A UBAF reactor was applied to advanced treatment for ABR effluent. The coke powder with the diameter of 0.5–1.0mm and the gas-water ratio of 7:1 were chosen the optimal experimental conditions. Under the above-optimal experimental conditions, the COD removal efficiency of UBAF was 69.5–82.6%. After the combined treatment by ABR and UBAF, the cosmetic wastewater effluent can effectively supply the discharge standard in China.

AbstractTo reclaim the lignite-derived created during the dehydration procedure of lignite as cooling water; a laboratory-scale horizontal subsurface flow constructed wetland was designed to treat this lignite-derived water in this research. In laboratory-scale wetlands, manganese ore constructed wetland was proven to be a feasible treatment technology for lignite-derived water reclamation. Comparing with lignite constructed wetland, manganese ore wetland showed better removal for all target pollutants including Fe, Mn, Chemical oxygen demand (COD), turbidity, and NH3–N. The removal efficiencies of COD, turbidity, and NH3–N increased accordingly with the increase of hydraulic retention time from 2 to 5 d inside both wetlands. With the hydraulic residence times at 5 d, the COD, turbidity, NH3–N Fe, and Mn removal efficiencies were up to 76.2, 95.0, 84.8, 64.3, and 93.0% in the manganese ore case, respectively. After the treatment of manganese ore constructed wetland the COD, turbidity, ammonia nitrogen, Fe, and Mn concentrations can supply the requirement of national standard of reclaimed water quality (GB/T 19923-2005).