Sun Faqian, Su Xiaomei, Kang Tingting, Wu Songwei, Yuan Mengdong, Zhu Jing, Zhang Xiayun, Xu Fang, Wu Weixiang
Institute of Environmental Science and Technology, Zhejiang University, Hangzhou 310058, China.
Quzhou Environmental Sanitation Department, Quzhou 324000, China.
Sci Rep. 2016 Jun 9;6:27744. doi: 10.1038/srep27744.
A new process consisting of a landfill bioreactor, partial-nitritation (PN) and the anammox process has been developed for landfill leachate treatment. In this study, the landfill bioreactor exhibited excellent performance in methane-rich biogas recovery, with a specific biogas yield of 0.47 L gas g(-1) COD and methane percentages of 53-76%. PN was achieved in the aerobic reactor by high free ammonia (101 ± 83 mg NH3 L(-1)) inhibition for nitrite-oxidizing bacteria, and the desired PN effluent composition (effluent nitrite: ammonium ratio of 1.1 ± 0.3) was controlled by adjusting the alkalinity concentration per unit of ammonium oxidized to approximately 14.3 mg CaCO3 mg(-1) N in the influent. The startup of anammox process was successfully achieved with a membrane bioreactor in 160 d, and a maximum nitrogen removal rate of 216 mg N L(-1) d(-1) was attained for real landfill leachate treatment. The quantitative polymerase chain reaction results confirmed that the cell-specific anammox activity was approximately 68-95 fmol N cell(-1) d(-1), which finally led to the stable operation of the system.
一种由垃圾填埋场生物反应器、亚硝化（PN）和厌氧氨氧化工艺组成的新工艺已被开发用于处理垃圾渗滤液。在本研究中，垃圾填埋场生物反应器在富含甲烷的沼气回收方面表现出色，比沼气产量为0.47 L气体g(-1) COD，甲烷含量为53 - 76%。通过高游离氨（101 ± 83 mg NH3 L(-1)）对亚硝酸盐氧化细菌的抑制作用，在好氧反应器中实现了PN，并且通过将每单位氧化铵的碱度浓度调节至进水约14.3 mg CaCO3 mg(-1) N，控制了所需的PN出水组成（出水亚硝酸盐：铵比为1.1 ± 0.3）。利用膜生物反应器在160 d内成功实现了厌氧氨氧化工艺的启动，对于实际垃圾渗滤液处理，最大氮去除率达到216 mg N L(-1) d(-1)。定量聚合酶链反应结果证实，细胞特异性厌氧氨氧化活性约为68 - 95 fmol N cell(-1) d(-1)，最终实现了系统的稳定运行。
