Liu Kaili, Lv Longyi, Li Weiguang, Wang Xinyuan, Han Muda, Ren Zhijun, Gao Wenfang, Wang Pengfei, Liu Xiaoyang, Sun Li, Zhang Guangming
Tianjin Key Laboratory of Clean Energy and Pollution Control, School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, PR China.
Tianjin Key Laboratory of Clean Energy and Pollution Control, School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, PR China.
Bioresour Technol. 2023 Nov;387:129615. doi: 10.1016/j.biortech.2023.129615. Epub 2023 Aug 6.
The long duration of landfill stabilization is one of the challenges faced by municipalities. In this paper, a combination of micro-aeration and leachate recirculation is used to achieve rapid degradation of organic matter in landfill waste. The results showed that the content of volatile fatty acids (VFAs) in the hydrolysis phase increased significantly and could enter the methanogenic phase quickly. Until the end of the landfill, the removal rates of chemical oxygen demand (COD), total phosphorus (TP) and ammonia nitrogen (NH-N) by micro-aeration and leachate recirculation reached 80.17 %, 48.30 % and 48.56 %, respectively, and the organic matter degradation rate reached 50 %. Micro-aeration and leachate recirculation enhanced the abundance of facultative hydrolytic bacteria such as Rummeliibacillus and Bacillus and the oxygen tolerance of Methanobrevibacter and Methanoculleus. Micro-aeration and leachate recirculation improved the organic matter degradation efficiency of landfill waste by promoting the growth of functional microorganisms.
垃圾填埋场稳定化所需时间长是市政当局面临的挑战之一。本文采用微曝气与渗滤液回流相结合的方法，实现垃圾填埋场废弃物中有机物的快速降解。结果表明，水解阶段挥发性脂肪酸（VFAs）含量显著增加，并能迅速进入产甲烷阶段。直至垃圾填埋结束，微曝气与渗滤液回流对化学需氧量（COD）、总磷（TP）和氨氮（NH-N）的去除率分别达到80.17%、48.30%和48.56%，有机物降解率达到50%。微曝气与渗滤液回流提高了诸如鲁氏芽孢杆菌和芽孢杆菌等兼性水解细菌的丰度以及嗜甲基短杆菌和甲烷袋状菌的耐氧性。微曝气与渗滤液回流通过促进功能微生物的生长，提高了垃圾填埋场废弃物的有机物降解效率。
