Bio-kinetics evaluation and batch modeling of the anammox mixed culture in UASB and EGSB reactors: batch performance comparison and kinetic model assessment
Bio-kinetics evaluation and batch modeling of the anammox mixed culture in UASB and EGSB reactors: batch performance comparison and kinetic model assessment
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DOI：
10.1039/c5ra14648h
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发表时间：
2016-01
期刊：
影响因子：
3.9
通讯作者：
Qigui Niu;Shilong He;Yanlong Zhang;Yu Zhang;Min Yang;Y. Li
中科院分区：
文献类型：
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作者：
Qigui Niu;Shilong He;Yanlong Zhang;Yu Zhang;Min Yang;Y. Li
为预测厌氧氨氧化反应器的运行性能并评价优化后的工艺操作，对UASB-厌氧氨氧化反应器和EGSB-厌氧氨氧化反应器的生物量进行了批式实验，建立了多个动力学模型。根据底物变化的时间序列，混合培养物的反应分为三个阶段：厌氧氨氧化反应，反硝化和细胞裂解。在所选的六种动力学模型中，Hanlev和Luong模型被认为是最合适的，预测的rmax分别为0.28、0.30 gN gVSS−1 d−1，Ks分别为53.38、52.52 mg NH 4 +-N L−1，抑制系数分别为900和928 mg N L−1。模拟的厌氧氨氧化比活性（SAA）在纵向分布的两个反应器中发现显着差异。EGSB-厌氧氨氧化生物量具有最高的rmax为0.30 gN gVSS−1 d−1，Ks为53.38 mg NH 4 +-N L−1（123.84 mg TN L−1），均在模型和实验中得到验证。相反，UASB-厌氧氨氧化反应器的生物量变化很大，从反应器顶部到底部为0.1 ~ 0.6 gN gVSS−1 d−1，整个系统的去除效率较低。还发现，第二次进料倾向于增加较高纯度的厌氧氨氧化生物质的SAA。
To predict the performance and evaluate the optimized process operation, a number of kinetic models were conducted in batch experiments for UASB-anammox biomass and EGSB-anammox biomass. Following a time series with substrate variations, the reaction of the mixed culture was separated into three phases: the anammox reaction, denitrification and cell lysis. Among the six selected kinetic models, the Hanlev and Luong models were found to be the most appropriate, with a prospected rmax of 0.28, 0.30 gN gVSS−1 d−1, a Ks of 53.38, 52.52 mg NH4+-N L−1 and inhibition coefficient of 900 and 928 mg N L−1, respectively. Significant differences were found in the simulated specific anammox activity (SAA) in the two reactors following longitudinal distribution. The EGSB-anammox biomass had the highest rmax of 0.30 gN gVSS−1 d−1, and a Ks of 53.38 mg NH4+-N L−1 (123.84 mg TN L−1), both validated in the models and experimentally. In contrast, a large variation was found in the UASB-anammox biomass, from 0.1 to 0.6 gN gVSS−1 d−1 from the top to the bottom of the reactor, and the removal efficiency of the whole system was lower. It was also found that a second feeding tended to increase the SAA for higher purity anammox biomass.