Harbin Institute of Technology Shenzhen Graduate School, Shenzhen, China.
Water Sci Technol. 2012;66(10):2243-50. doi: 10.2166/wst.2012.460.
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.
三个平行的生物缺氧滤池（BaFs）被用来研究甲醇、啤酒废水和面包废水的反硝化动力学。实验在 15-20°C 的温度范围内进行，进水硝酸盐和碳的剂量分别为 30mg/L 和 150mg COD/L（COD：化学需氧量）。啤酒废水、面包废水和甲醇的反硝化效率分别为 84%、66%和 74%，比反硝化速率分别为 1.44kgNO3-N/m3·d、1.11kgNO3-N/m3·d 和 1.24kgNO3-N/m3·d，总氮（TN）去除率分别为 74%、62%和 66%。挥发性附着固体（VAS）测试表明甲醇的净生物质产量最小，因此完全反硝化所需的碳氮比（以 COD 与硝酸盐的比值表示，C/N）最小。而啤酒废水和面包废水需要更高的 C/N 比来去除所有的硝酸盐氮，并且当它们用作外部碳源时，可能都需要进行预处理以去除磷酸盐。
