title: Continuous removal of ore floatation reagents by an anaerobic-aerobic biological filter.
abstract: A laboratory scale up-flow anaerobic-aerobic biological filter was constructed to treat synthetic ore floatation wastewater. Volcanic stone was applied as packing media for aerobic section. Biodegradation of some common ore floatation reagents as potassium ethyl xanthate dithiophosphate and turpentine were evaluated. An average COD reduction rate of 88.7% for potassium ethyl xanthate by the biofilter was obtained at HRT of 6h, air water flow ratio of 10:1 and pH of 7. Its effluent COD concentration varied between 17 and 43 mg/L. Xanthates and dithiophosphate were found to be easily biodegradable, whereas turpentine was not favorable for microorganism to digest. The performance of the reactor fluctuated slightly within the temperature range of 10-35 °C. Operation of the biofilter was sensitive to influent pH values. A neutral to weak basic influent was preferred for biofilter to maintain an efficient operation. Anaerobic treatment was able to enhance the biodegradability of influents significantly.
authors.affiliation: School of Civil and Environment Engineering, University of Science and Technology Beijing, Beijing 100083, China. chh_1214@163.com
authors.forename: Huang
authors.initials: H
authors.lastname: Cheng
authors.forename: Hai
authors.initials: H
authors.lastname: Lin
authors.forename: Hanxin
authors.initials: H
authors.lastname: Huo
authors.forename: Yingbo
authors.initials: Y
authors.lastname: Dong
authors.forename: Qiuyu
authors.initials: Q
authors.lastname: Xue
authors.forename: Lixia
authors.initials: L
authors.lastname: Cao
mesh_terms: D001420:Bacteria, Aerobic / Q000378:metabolism*; D001421:Bacteria, Anaerobic / Q000378:metabolism*; D001673:Biodegradation, Environmental; D019149:Bioreactors / Q000382:microbiology*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005374:Filtration / Q000295:instrumentation*; D007220:Industrial Waste / Q000517:prevention & control*; D008906:Mining; D014874:Water Pollutants, Chemical / Q000302:isolation & purification / Q000378:metabolism*; D018508:Water Purification / Q000295:instrumentation*
chemical_list: D007220:Industrial Waste; D014874:Water Pollutants, Chemical