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五年来的试验和研究表明:冬季我国北方沼气产量低的关键因素是低温。池温不得低于13℃;适宜的发酵液浓度是12—16%;适当的发酵原料配比是50%玉米秸秆+20%人粪+20%猪粪+9.0%骡马粪+0.3%氮素。保温增温措施有挖防寒沟、建深温室和池上进行高温堆肥。在池内外采用综合保温措施后,池温可以提高7℃,日平均产气量可达0.165m~3/m~3·d,这样就切实地解决了我国北方冬季不能产沼气的技术问题。
Five years of experiments and studies have shown that the key factor of low biogas production in northern China in winter is low temperature. The temperature of the pool should not be lower than 13 ℃. The suitable concentration of fermentation broth is 12-16%. The suitable proportion of the fermented raw material is 50% corn stover + 20% human excrement + 20% pig excrement + 9.0% mule + 0.3% nitrogen Prime Insulation and warming measures are digging cold ditch, built deep greenhouses and ponds for high temperature composting. After adopting the comprehensive insulation measures both inside and outside the pool, the temperature of the pond can be increased by 7 ℃ and the daily average gas production can reach 0.165m ~ 3 / m ~ 3 · d, so that the technical problems that the north of our country can not produce biogas in winter can be solved effectively.