沼氣工程並不是沒有大範圍推廣，而是由於(yu) 工業(ye) 化程度過低所以沒有在工業(ye) 化。沼氣提純也是沼氣工程的一個(ge) 重要步驟！
The biogas project is not not not popularized on a large scale, but is not industrialized in China because of the low degree of industrialization. Biogas purification is also an important step in biogas engineering.
以德國、瑞典為(wei) 例的沼氣發達國家的沼氣工程產(chan) 量規模已經可以用於(yu) 大規模區域供暖、發電、車用燃氣，其中的主要原因就是工業(ye) 化程度差異。
Taking Germany and Sweden as examples, the production scale of biogas projects in developed countries can be used for large-scale regional heating, power generation and automotive gas. The main reason is the difference of industrialization degree.
我國沼氣以戶用型沼氣池為(wei) 主，即便是沼氣工程，發酵罐規模也相對而言較小。特點是無加熱或加熱設備落後（盤管）、無攪拌或使用簡單的機械攪拌、無預處理等，這些都是導致我國沼氣反應器產(chan) 量低、反應速度慢甚至被棄置的原因。
Domestic biogas digesters are the main type of biogas in China. Even in biogas engineering, the scale of fermentation tanks is relatively small. It is characterized by no heating or backward heating equipment (coil), no stirring or simple mechanical stirring, no pretreatment and so on. These are the reasons for low production, slow reaction speed and even abandonment of biogas reactors in China.
生物反應對溫度非常敏感，這也是沼氣池夏季產(chan) 氣多、冬季產(chan) 氣少的原因，因此沼氣反應器的增溫保溫是維持穩定沼氣產(chan) 出的重要因素之一。
Biological reaction is very sensitive to temperature, which is also the reason why methane digester produces more gas in summer and less gas in winter. Therefore, the heat preservation of biogas reactor is one of the important factors to maintain stable methane production.
我國比較成功的大規模沼氣工程也很多，例如北京德清源、內(nei) 蒙古蒙牛奧亞(ya) 等等。
There are many successful large-scale biogas projects in China, such as Deqingyuan in Beijing, Mengniu Aoya in Inner Mongolia and so on.
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2019-07-08
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