摘要
对新型厌氧氨氧化折流板反应器的启动和运行性能进行了研究,并对其过程动力学特性进行了分析.试验中采用了两种启动策略:一是固定水力停留时间(HRT)(24h)并逐步提高进水基质浓度,二是固定进水浓度并逐步缩短HRT.结果显示后者(低基质浓度高水力负荷)更利于厌氧氨氧化反应器的启动.当厌氧氨氧化反应成功启动后,消耗的氨氮亚硝酸氮以及产生的硝酸氮的比值为1:(1.22±0.18):(0.13±0.06),接近理论比值.当进水总氮浓度为434mg.L-1,水力停留时间为3h,容积总氮负荷为3.45kg.m-.3d-1时,在153d取得了最大容积基质去除负荷3.00kg.m-.3d-1.使用二级动力学模型和改进的Stover-Kincannon模型对厌氧氨氧化反应器的动力学行为进行了模拟,获得了模型参数.模拟结果表明:二级动力学模型的预测精度比改进型Stover-Kincannon模型更高.
The start-up and performance of a novel Anammox（anaerobic ammonium oxidation） baffled reactor were studied and the process kinetics of the reactor was analyzed.There were two start-up strategies for Anammox process.The first was with fixed hydraulic retention time（HRT）（24h） and gradual increase in the influent substrate concentration,while the second was a fixed influent substrate concentration and gradual reduce in the HRT.The results showed that the latter（low substrate concentration with high hydraulic loading） was more conducive to Anammox reactor start-up.When start-up of the Anammox process was fulfilled,the ratio of consumed ammonia nitrogen,consumed nitrite nitrogen and produced nitrate nitrogen was 1：（1.22 ± 0.18）：（0.13 ± 0.06）,which approached to the theoretical value.When the influent total nitrogen concentration was 434 mg.L-1 at the HRT of 3h which corresponded to a nitrogen loading rate of 3.45 kg.m-.3d-1,the maximum total substrate removal rate of 3.00 kg.m-.3d-1 was observed at the 153rd day.The kinetic behaviors of Anammox were simulated by the second-order kinetic model and the modified Stover-Kincannon model,and the model parameters were obtained.The simulation results showed that the prediction accuracy of second-order kinetic model was better than that of the modified Stover-Kincannon model.
出处
《环境科学学报》
CAS
CSCD
北大核心
2011年第10期2138-2145,共8页
Acta Scientiae Circumstantiae
基金
国家自然基金项目(No.50808060
51078121)
浙江省自然科学基金项目(No.Y5090072)
杭州市科技发展计划项目(No.20091133B06)~~
