Enhanced removal of total nitrogen and total phosphorus by applying intermittent aeration to the Modified Ludzack-Ettinger (MLE) process
Enhanced removal of total nitrogen and total phosphorus by applying intermittent aeration to the Modified Ludzack-Ettinger (MLE) process
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通过在改进的 Ludzack-Ettinger (MLE) 工艺中应用间歇曝气来增强总氮和总磷的去除
DOI：
10.1016/j.jclepro.2017.08.017
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发表时间：
2017-11
影响因子：
11.1
通讯作者：
Wang Jianmin
中科院分区：
文献类型：
--
作者：
Liu Guoqiang;Wang Jianmin
在传统的预缺氧改性Ludzack-Ettinger （MLE）工艺中，硝化混合液不能完全返回到预缺氧区进行反硝化。在本研究中，我们将间歇曝气应用于MLE工艺，以增强反硝化和总磷（TP）的去除。中试结果表明，在碳（以5天生物需氧量为代表）与总氮（TN）比（如C/N比）大于2.4的城市污水处理中，出水氨、总氮和总磷一般分别小于0.5 mg-N/L、5 mg-N/L和0.5 mg-P/L。对总氮和总磷的去除率均在90%左右。在9.3℃的极低温和1.6的低C/N条件下，该工艺仍能脱除76%的TN和56%的TP。与传统的MLE工艺相比，间歇曝气的实施显著提高了TN和TP的去除率，并节约曝气能量10%。现有的MLE工厂可以很容易地升级到这种间歇曝气模式，以实现增强的营养物去除，同时节省能源。
In the conventional preanoxic Modified Ludzack-Ettinger (MLE) process, the nitrified mixed liquor cannot be completely returned to the preanoxic zone for denitrification. In this study, we applied intermittent aeration to the MLE process to enhance denitrification and total phosphorus (TP) removal. Pilot-scale test results indicated that, when treating municipal wastewater with a carbon (represented by five-day biological oxygen demand) to total nitrogen (TN) ratio (e.g. C/N ratio) of 2.4 or greater, the effluent ammonia, TN, and TP were generally less than 0.5 mg-N/L, 5 mg-N/L, and 0.5 mg-P/L, respectively. The removal efficiencies of both TN and TP were approximately 90%. Under extremely low temperature of 9.3 °C and low C/N ratio of 1.6 conditions, this process still removed 76% of TN and 56% of TP. Compared to the conventional MLE process, the implementation of intermittent aeration significantly improved TN and TP removal and also saved aeration energy by 10%. Existing MLE plants can be easily upgraded to this intermittent aeration mode to achieve enhanced nutrient removal while saving energy.
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DOI：
10.2166/wst.2009.242
发表时间：
2009-06
期刊：
Water science and technology : a journal of the International Association on Water Pollution Research
影响因子：
--
作者：
Hansaem Lee;Jonghun Han;Z. Yun
通讯作者：
Hansaem Lee;Jonghun Han;Z. Yun
DOI：
10.4028/www.scientific.net/amr.476-478.1647
发表时间：
2012-02
期刊：
Advanced Materials Research
影响因子：
--
作者：
Xiao Cui Wang;Xinjiang Luo
通讯作者：
Xiao Cui Wang;Xinjiang Luo
影响因子：
11.4
作者：
Ge, Shijian;Peng, Yongzhen;Cao, Xu
通讯作者：
Cao, Xu
影响因子：
11.1
作者：
M. A. Fulazzaky;N. H. Abdullah;A. R. Yusoff;E. Paul
通讯作者：
M. A. Fulazzaky;N. H. Abdullah;A. R. Yusoff;E. Paul
影响因子：
3.1
作者：
Patrícia Habermeyer;Antoni Sánchez
通讯作者：
Patrícia Habermeyer;Antoni Sánchez