Wang Ya-Nan, Wang Qingzhao, Li Yahui, Wang Huawei, Gao Ying, Sun Yingjie, Wang Bingpeng, Bian Rongxing, Li Weihua, Zhan Meili
Qingdao Solid Waste Pollution Control and Resource Engineering Research Center, Qingdao University of Technology, School of Environmental and Municipal Engineering, Qingdao, China.
Qingdao Solid Waste Pollution Control and Resource Engineering Research Center, Qingdao University of Technology, School of Environmental and Municipal Engineering, Qingdao, China.
Bioresour Technol. 2023 Jun;377:128978. doi: 10.1016/j.biortech.2023.128978. Epub 2023 Mar 28.
Co-landfill of incineration slag and municipal solid waste (MSW) is a main method for disposal of slag, and it has the potential of promoting methane (CH) production and accelerating landfill stabilization. Four simulated MSW landfill columns loaded with different amount of slag (A, 0%; B, 5%; C, 10%; D, 20%) were established, and the CH production characteristics and methanogenic mechanisms were investigated. The maximum CH concentration in columns A, B, C and D was 10.8%, 23.3%, 36.3% and 34.3%, respectively. Leachate pH and refuse pH were positively correlated with CH concentration. Methanosarcina was the dominant genus with abundance of 35.1%∼75.2% and it was positively correlated with CH concentration. CO-reducing and acetoclastic methanogenesis were the main types of methanogenesis pathway, and the methanogenesis functional abundance increased with slag proportion during stable methanogenesis process. This research can help understanding the impact of slag on CH production characteristics and microbiological mechanisms in landfills.
焚烧炉渣与城市生活垃圾（MSW）共填埋是炉渣处置的主要方法，且具有促进甲烷（CH）产生及加速填埋场稳定化的潜力。建立了四个装载不同量炉渣的模拟城市生活垃圾填埋柱（A，0%；B，5%；C，10%；D，20%），并研究了CH产生特性及产甲烷机制。A、B、C和D柱中的最大CH浓度分别为10.8%、23.3%、36.3%和34.3%。渗滤液pH值和垃圾pH值与CH浓度呈正相关。甲烷八叠球菌是优势菌属，丰度为35.1%∼75.2%，且与CH浓度呈正相关。CO还原型和乙酸裂解型产甲烷是主要的产甲烷途径类型，在稳定产甲烷过程中，产甲烷功能丰度随炉渣比例增加而升高。本研究有助于了解炉渣对填埋场CH产生特性及微生物机制的影响。
