title: Enhanced denitrification with external carbon sources in a biological anoxic filter.
abstract: Three parallel biological anoxic filters (BaFs) were operated to investigate the denitrification kinetics of methanol, brewery wastewater and bakery wastewater. The experiment was conducted within the temperature range of 15-20 °C, with an influent nitrate and carbon dosage of 30 mg/L and 150 mg COD/L (COD: chemical oxygen demand). The denitrification efficiencies of brewery wastewater, bakery wastewater and methanol were 84, 66 and 74%, specific denitrification rates were 1.44, 1.11 and 1.24 kg NO(3)-N/m(3) d, and total nitrogen (TN) removal rates were 74, 62 and 66%, respectively. The volatile attached solid (VAS) tests reveal that methanol has the minimum net biomass yield, so it needs the least carbon to nitrogen (expressed in COD to nitrate, C/N) ratio for complete denitrification. While the brewery wastewater and bakery wastewater need higher C/N ratio to remove all nitrate nitrogen, and they both may need pretreatment to remove phosphate when used as external carbon sources.
authors.affiliation: Harbin Institute of Technology Shenzhen Graduate School, Shenzhen, China.
authors.forename: Wen-yi
authors.initials: WY
authors.lastname: Dong
authors.forename: Xian-bing
authors.initials: XB
authors.lastname: Zhang
authors.forename: Hong-jie
authors.initials: HJ
authors.lastname: Wang
authors.forename: Fei-yun
authors.initials: FY
authors.lastname: Sun
authors.forename: Tong-zhou
authors.initials: TZ
authors.lastname: Liu
mesh_terms: D018533:Biomass; D002244:Carbon / Q000737:chemistry*; D005374:Filtration / Q000295:instrumentation* / Q000379:methods*; D019649:Food Industry; D009566:Nitrates / Q000737:chemistry*; D010100:Oxygen; D012441:Saccharomyces cerevisiae; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical
chemical_list: D009566:Nitrates; D014874:Water Pollutants, Chemical; D002244:Carbon; D010100:Oxygen