摘要
在某生物除铁除锰水厂,以中试模拟滤柱开展了硝化耦合CANON的铁锰氨生物净化工艺启动与运行试验,并分析了氨氮转化去除路径.结果表明,生物除铁除锰滤池历经164 d驯化培养,可实现硝化耦合CANON去除氨氮并稳定运行,特征值ΔNH+4-N/ΔNO-3-N为1.49,生物滤柱对Fe(Ⅱ)、Mn(Ⅱ)和NH+4-N的氧化去除量分别为(9.87±1.17)、(2.25±0.06)和(1.51±0.06)mg·L-1.基于氮素守恒和溶解氧(DO)守恒分析,通过CANON过程去除的氨氮质量分数为33.48%~38.87%,氨氮去除量与实际需氧量的平均比例为1∶3.79~1∶3.94.温度越低,氨氮经CANON过程去除的质量分数越低.
A pilot-scale bio-filter coupled nitrification and CANON was started up to remove iron,manganese and ammonia nitrogen from groundwater in a plant,and the main removal route of ammonia nitrogen was analyzed. The experiment showed that the bio-filter could be started up successfully and achieved stable operation after 164 days of culture development. The value of ΔNH＋4-N/ΔNO-3-N was 1. 49,and the oxidation and removal of Fe（Ⅱ）,Mn（Ⅱ）,and NH＋4-N were（9. 87 ± 1. 17）,（2. 25 ± 0. 06）,and（1. 51 ±0. 06） mg·L^-1,respectively. The calculation based on the quantitative relationship between nitrogen conservation and dissolved oxygen（DO） measurement indicated that the contribution of CANON to NH＋4-N removal was 33. 48%-38. 87%,and the average ratio of ammonia nitrogen removal amount to DO was 1 ∶ 3. 79-1 ∶ 3. 94. The removal ratio of ammonia nitrogen was lower with lower temperature.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2018年第3期1264-1271,共8页
Environmental Science
基金
国家自然科学基金项目(51678006)
关键词
铁锰
氨氮
CANON
氮素守恒
DO
iron and manganese
ammonia nitrogen
CANON
nitrogen conservation
dissolved oxygen
