蜂窝填料三相流化床去除城市污水中的总氮特性研究

在好氧条件下,构建了蜂窝填料三相流化床,研究了三相流化床去除城市污水中总氮的效果以及氨态氮、亚硝酸盐和硝态氮转化规律.结果表明,当HRT为3h时,三相流化床对总氮去除率为52.61％.氨氮去除率为45.71％,进、出水中的亚硝酸盐和硝酸盐氮质量浓度均较低(进水低于1.12 mg/L,出水低于4.52 mg/L).对剥落...

Total Nitrogen Removal Performances of Municipal Wastewater by Using Three Phase Fluidized Bed with Honeycomb Biocarries

A three phase fluidized bed with honeycomb biocarries was developed,and used for removal total nitrogen(TN),amm ounia nitrogen(NH₄⁺-N),nitrate nitrogen(NO₃^--N)and nitrite nitrogen(NO₂^--N)from municipal wastewater under an aerobic conditions.The experimental results indicated that the TN and NH₄⁺-N removal rates were 52.61%and 45.71%of the three phase fluidized bed,the influent and effluent NO₃^--N and NO₂^--N concentration kept a low degree(influent≤1.12 mg/L,effluent≤4.52 mg/L).Two parallel isolation lab-experiments were carried out when the biofilms was peeled from the honeycomb biocarries holes,the results verified that the nitrifying bacteria and denitrifying bacteria co-exist in the different honeycomb biocarries holes.The dominant group of biofilms in the different honeycomb biocarries holes have a significantly different and aerobic zone/oxic zone can coexist due to the honeycomb biocarries structure.