麦秸中温厌氧干发酵技术实验研究

Mesophilic and Dry Anaerobic Digestion of Wheat Straw

本文研究了麦秸秆中温厌氧干发酵过程中的沼气产量和发酵残留物中有机质、全氮、速效磷、速效钾的含量及其与发酵条件的相关关系。实验结果表明,沼气产量随着发酵原料中固体浓度的增加而减少;发酵残留物中有机质、全氮、速效磷、速效钾的含量和发酵原料中固体浓度的关系并不十分明显,但在沼气产量较高的发酵工况下,其发酵残留物中有机质、全氮、速效磷、速效钾的含量较多,为进一步开发秸秆中温厌氧干发酵技术提供科学参考。

Relations among fermentation concentration, biogas production and constituents of fermentation residue were studied for mesophilic and dry anaerobic fermentation. The result showed that biogas production was reduced with increasing of TS content in the fermentation. And the constituents of fermentation residue, namely, organic matter, total nitrogen, rapidly-available phosphorus and potassium, did not have very obvious relations with fermentation TS concentration. The fermentation residue had higher contents of total nitrogen, rapidly-available phosphorus and potassium under higher biogas yield condition.