title: High-load domestic wastewater treatment using a combined anaerobic-aerobic bio-filter with coal cinder as medium.
abstract: A combined anaerobic-aerobic bio-filter technology was used for field treatment of high-organic-load domestic wastewater with coal cinder as the bio-filter medium. The effects of parameters, including hydraulic retention time (HRT) and backflow ratio, on the decrease in the chemical oxygen demand (COD), NH3-N, total nitrogen (TN), total phosphorus (TP), and turbidity were investigated. The results showed the obvious influence of the HRT and ratio of backflow on wastewater treatment. Under the optimal HRT condition of 18 h, the removal efficiencies of COD, NH3-N, TN, TP, and turbidity were 67.9%, 95.6%, 30.4%, 65.6%, and 83.8%, respectively. When the backflow ratio (2:1) was added to the treatment system, the TN removal obviously increased, and the removal efficiencies of COD, NH3-N, TN, TP, and turbidity were 88.1%, 91.7%, 69.9%, 69.6%, and 97.5%, respectively. These results indicated that the combined technology has the potential as a treatment method for high-organic-load domestic wastewater.
authors.affiliation: a College of Environmental Science and Engineering, Fujian Key Laboratory of Pollution Control & Resource Reuse , Fujian Normal University , Fuzhou , People's Republic of China.
authors.forename: Yaoxing
authors.initials: Y
authors.lastname: Liu
authors.affiliation: b Nanjing University Research Institute (Changshu) Co., Ltd , Changshu , People's Republic of China.
authors.forename: Yuxin
authors.initials: Y
authors.lastname: Lei
authors.affiliation: c College of Hydraulic and Environmental Engineering , China Three Gorges University , Yichang , People's Republic of China.
authors.forename: Yin
authors.initials: Y
authors.lastname: Xi
authors.affiliation: c College of Hydraulic and Environmental Engineering , China Three Gorges University , Yichang , People's Republic of China.|d Department of Architectural Science , Ryerson University , Ontario , Canada.
authors.forename: Zaiyi
authors.initials: Z
authors.lastname: Liao
authors.affiliation: b Nanjing University Research Institute (Changshu) Co., Ltd , Changshu , People's Republic of China.
authors.forename: Xia
authors.initials: X
authors.lastname: Zhang
mesh_terms: D000693:Anaerobiosis; D003031:Coal; D005374:Filtration / Q000379:methods*; D009584:Nitrogen; D010758:Phosphorus; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater / Q000737:chemistry*
chemical_list: D003031:Coal; D009584:Nitrogen; D010758:Phosphorus; D062065:Wastewater
keywords: Three gorges area; biofilm bioreactors; domestic wastewater; removal; wastewater treatment