A tracer monitoring for the landfill gas concentration variation on the condition of leachate recycling as compared with that of the un-recycling in semi-aerobic landfill.

对准好氧填埋结构渗滤液回流情况下填埋气产气过程做了跟踪监测。定期测定填埋气中的组分浓度变化，结合填埋场渗滤液水质变化进行分析。

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Gas production of soy sauce was caused by aerobic bacteria. Summer is the rush season for soy sauce spoilage since bacteria grow and reproduce well.

酱油产气是由产气菌引起的，夏季是产气菌生长繁殖的旺盛期，酱油更容易发生产气现象。

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