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231.
Anaerobic ammonium oxidation (Anammox) has become a promising method for biological nitrogen removal. However, this biotechnology application is always limited due to the low growth rate and biomass yield of Anammox bacteria. This study investigated the process of fast reactivation of an Anammox consortium idled for 2 years uia hydrodynamic stress control. The results showed that the Anammox system was efficiently and quickly reactivated by shortening of the hydraulic retention time (I-IRT) of the reactor from 12 to 6 hr within 68 days of operation. Moreover, at a 4-hr HRT with an influent total nitrogen loading rate of 1.2 kg N/(m3.day), the reactor maintained high biological performance with an ammonium removal loading rate of 0.52 kg N/(m3.day) and a nitrite removal rate of 0.59 kg N/(m3.day). In the reactivated Anammox reaction, the stoichiometric coefficients of NH4-N to NOE-N and NH4-N to NO4-N were 1:1.04± 0.08 and 1:0.31 ± 0.03, respectively. The specific Anammox activity and hydrazine oxidoreductase activity, both of which represent the degree of Anammox bacteria present, increased as the hydrodynamic stress increased and were maximally (125.38 ± 3.01 mg N/(g VSS.day) and 339.42 ± 6.83 μmol/(min.g VSS), respectively) at 4-hr HRT. Microbial response analysis showed that the dominant microbial community was obviously shifted and the dominance of Anammox bacteria was enhanced durinR the hydrodynamic selection. 相似文献
232.
Gu Zhiqi Bian Jianmin Wu Juanjuan Ruan Dongmei Yu Yexiang Zhang Han 《Environmental science and pollution research international》2022,29(14):20479-20495
Environmental Science and Pollution Research - The groundwater environment changes under the influence of anthropogenic activities. Because of the construction of the Da’an irrigation area,... 相似文献
233.
通过介绍广州石化加氢站工艺流程、加氢母站操作关键点,探讨运行过程中已出现及潜在的隐患问题,包括行业相关标准不完善、加氢母站阀门的使用隐患、充装计量偏差及充装流速偏大等问题,并提出相应的措施对策。 相似文献
234.
Wang Panlin Zhao Jindi Ruan Yongqiang Cai Xinyi Li Jin Zhang Lihui Huang He 《Journal of Polymers and the Environment》2022,30(9):3949-3958
Journal of Polymers and the Environment - In the present study, two strains of Pseudomonas aeruginosa, WZH-4 and WGH-6, were isolated based on their ability to survive with polypropylene (PP) as... 相似文献