title: A combined upflow anaerobic sludge bed and trickling biofilter process for the treatment of swine wastewater.
abstract: A combined upflow anaerobic sludge blanket (UASB)-trickling biofilter (TBF) process was constructed to treat swine wastewater, a typical high-strength organic wastewater with low carbon/nitrogen ratio and ammonia toxicity. The results showed that the UASB-TBF system can remarkably enhance the removal of pollutants in the swine wastewater. At an organic loading rate of 2.29 kg/m(3) d and hydraulic retention time of 48 h in the UASB, the chemical oxygen demand (COD), Suspended Solids and Total Kjeldahl Nitrogen removals of the combined process reached 83.6%, 84.1% and 41.2%, respectively. In the combined system the UASB served as a pretreatment process for COD removal while nitrification and denitrification occurred only in the TBF process. The TBF performed reasonably well at a surface hydraulic load as high as 0.12 m(3)/m(2) d. Since the ratio of influent COD to total mineral nitrogen was less than 3.23, it is reasonable to suggest that the wood chips in TBF can serve as a new carbon source for denitrification.
authors.affiliation: a State Key Laboratory of Urban Water Resource and Environment , Harbin Institute of Technology , Harbin , People's Republic of China.
authors.forename: Bowei
authors.initials: B
authors.lastname: Zhao
authors.affiliation: b Centre de Recherche Industrielle du Québec , Québec , Canada.
authors.forename: Jiangzheng
authors.initials: J
authors.lastname: Li
authors.affiliation: b Centre de Recherche Industrielle du Québec , Québec , Canada.
authors.forename: Gerardo
authors.initials: G
authors.lastname: Buelna
authors.affiliation: b Centre de Recherche Industrielle du Québec , Québec , Canada.
authors.forename: Rino
authors.initials: R
authors.lastname: Dubé
authors.affiliation: b Centre de Recherche Industrielle du Québec , Québec , Canada.
authors.forename: Yann
authors.initials: Y
authors.lastname: Le Bihan
mesh_terms: D000641:Ammonia / Q000302:isolation & purification / Q000378:metabolism; D000693:Anaerobiosis; D000822:Animal Husbandry; D000818:Animals; D001419:Bacteria / Q000378:metabolism; D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors / Q000382:microbiology; D058440:Denitrification; D004867:Equipment Design; D005374:Filtration / Q000295:instrumentation* / Q000379:methods; D007220:Industrial Waste / Q000032:analysis; D058465:Nitrification; D009584:Nitrogen / Q000302:isolation & purification* / Q000378:metabolism; D012722:Sewage / Q000032:analysis / Q000382:microbiology; D013552:Swine; D014865:Waste Disposal, Fluid / Q000295:instrumentation* / Q000379:methods; D062065:Wastewater / Q000032:analysis* / Q000382:microbiology*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification* / Q000378:metabolism; D018508:Water Purification / Q000295:instrumentation / Q000379:methods
chemical_list: D000641:Ammonia; D007220:Industrial Waste; D009584:Nitrogen; D012722:Sewage; D062065:Wastewater; D014874:Water Pollutants, Chemical
keywords: Upflow anaerobic sludge blanket (UASB); combined process; nitrogen removal; swine wastewater treatment; trickling biofilter (TBF)