固定化细菌处理合成氨工业废水的试验研究

【作者】 章正勇；

【导师】 安立超；

【作者基本信息】 南京理工大学 ， 环境工程， 2007， 硕士

【摘要】 通过固定化亚硝酸菌来对合成氨工业废水进行短程硝化反硝化处理的小试、中试试验研究，试验结果表明：（1）文中的三种培养方式都能成功的实现亚硝酸细菌的富集培养，氨氮去除率和亚硝酸盐积累率分别能达到80％以上、90％以上。（2）反硝化细菌经过15天的培养就能达到很好的反硝化效果，反硝化负荷可以达到2.4kgNO_x^--N/m³·d。（3）小试试验适宜的运行参数：溶解氧4.5mg／L，温度35℃，水力停留时间16h。（4）经过14天的稳定性试验，小试系统氨氮去除率和亚硝酸盐积累率能分别稳定在87.1％以上、80.1％以上，氨氮容积负荷在0.40kgNH₄⁺-N／m³·d左右。（5）亚硝酸菌和反硝化菌中试现场的富集技术是成功的，亚硝化污泥的氨氮去除率和亚硝盐积累率分别达到了89.6％、91.3％，而反硝化污泥的容积负荷达到0.71kgNO_x^--N／m³·d。（6）进水流量25L／h时，中试试验适宜的运行参数：溶解氧4.5mg／L，回流比5：1。（7）中试处理系统经过7天的稳定性试验，氨氮去除率、亚硝酸盐积累率、总氮去除率、COD去除率都分别稳定在92％以上、82％以上、80％以上、87％以上，氨氮容积负荷在0.24kgNH₄⁺-N／m³·d左右。通过固定化亚硝酸细菌+缺氧／好氧（A／O）工艺来短程硝化反硝化处理合成氨工业废水是完全可行的，氨氮、COD都能够达到《合成氨工业水污染物排放标准》中的要求。更多还原

【Abstract】 The laboratory-scale and pilotscale experiment on the treatment to synthetic ammoniaindustries wastewater by immobilized bacteria was studied in this paper.The experimentshowed that:（1） Nitrosobacteria can be enriched by all the three kinds of enrichmenttechnique which are mentioned in this paper. The removal rate of ammonia-nitrogen andnitrite accumulation rate can reached up to 80%, 90%, respectively.（2） Denitrifyingbacteria has good denitrifying capability after 15 days’ enrichment, and the loading ratecan reach as much as 2.4kgNO_x^--N/m³·d.（3） The feasible running parameter for thelaboratory-scale experiment on the treatment to synthetic ammonia industries wastewater:DO, 4.5mg/L; T,35℃; HRT, 16h. （4） After 14 days’ stability experiment, ammonia--nitrogen removal rate and nitrite accumulation rate of laboratory-scale system can reachup to 87.1%, 80.1%, respectively, and ammonia-nitrogen loading rate reaches 0.40 kgNH₄⁺-N/m³·d or so.（5） The enrichment technique for nitrosobacteria and denitrifyingbacteria ofpilotscale experiment is successful, given that the ammonia—nitrogen removalrate and nitrite accumulation rate for nitrite sludge reach 89.6%, 91.3%, respectively, anddenitrifying loading rate reaches 0.71kgNO_x^--N/m³·d.（6） The feasible running parameterfor pilotscale system at a influent of 25L/h: DO, 4.5 mg/L; Circulation reflux ratio, 5:1.（7）After 7 days’ stability experiment, the removal rate of ammonia-nitrogen, TN, COD andnitrite accumulation rate of pilotscale treatment system can reach up to 92%, 82%, 87%,80% steadily, and the ammonia-nitrogen loading rate is about 0.24 kgNH₄⁺-N/m³·d.Shortcut nitrification-denitrification technology on the treatment to syntheticammonia industries wastewater using immobilized nitrosobacteria+A/O technology isfeasible, and ammonia-nitrogen, COD of the effluent are in accord with《SyntheticAmmonia Industries Wastewater Pollutant Discharge Standard》.更多还原