Covering ponds with crop straws or hay can also reduce temperature loss.
 

 

　　温度场的分布和变化将直接影响整个系统的产气量和产气率。沼气发酵受温度的影响较大,高温在夏季和秋季,天然气生产,尤其是冬季冬季气温低,沼气发酵原料的温度通常低于10℃,沼气生产受到严重影响,为了实现全年天然气供应的需求,必须加强冬季和春季池保温工作,其主要措施如下:

　　The distribution and change of temperature field will directly affect the gas production rate and gas production rate of the whole system. Biogas fermentation is greatly affected by temperature. In summer and autumn, the temperature of natural gas production, especially in winter, is low. The temperature of biogas fermentation raw materials is usually lower than 10 ℃. Biogas production is seriously affected. In order to meet the demand of natural gas supply throughout the year, it is necessary to strengthen the heat preservation work in winter and spring. The main measures are as follows:

　　(1)添加温粪

　　(1) Add warm feces

　　加入人粪肥、马粪或堆肥后的新鲜干草等发热量原料，适当提高池液浓度至10 ~ 12%;

　　Add the raw materials of calorific value such as human manure, horse manure or fresh hay after composting, and properly increase the concentration of the tank liquid to 10 ~ 12%;

　　(2)增加风障，降低温度消耗

　　(2) Increase wind barrier and reduce temperature consumption

　　沼气池建在背风处或建在沼气池的西北风壁上，也是降低温度消耗的简单方法;

　　The biogas digester is built on the leeward or the northwest wall of the digester, which is also a simple method to reduce the temperature consumption;

　　(3)秸秆覆盖保温

　　(3) Straw covering and heat preservation

　　用农作物秸秆或干草覆盖池塘也可以减少温度损失。

　　Covering ponds with crop straws or hay can also reduce temperature loss.