高含固率菜籽饼与牛粪-羊粪混合厌氧发酵产沼气特性

为充分利用菜籽饼和牛羊粪等固体废物资源并提高其产沼气性能，以农用沼气池为发酵装置，研究了高含固率菜籽饼和牛粪-羊粪10个不同配比(以干物质计)混合厌氧发酵40 d的产沼气特性。结果表明，各混合处理的整个发酵过程运行良好，厌氧消化运行情况稳定。其中，菜籽饼与羊粪干物质配比为2∶1时具有较高的产气潜力，累积产气量最大，达到122.92 m³·t⁻¹。同时，菜籽饼与羊粪混合发酵的产气效果要优于与牛粪混合的效果。修正的Gompertz模型显示，各处理能较好地拟合产沼气过程。其中，最大产沼气量(P_m)和最大产气速率(R_m)随菜籽饼添加量的增加而增大，产气滞留时间(λ)则随菜籽饼添加量的增加而降低。本研究结果可为菜籽饼和畜禽粪便的资源化利用提供参考。

Biogas production characteristics of mixed anaerobic fermentation of rapeseed cake with high solid content and cow dung-sheep manure

In order to make full use of the waste resources such as rape cake and cow dung and sheep manure and improve the biogas production performance at the same time, this test was based on the agricultural biogasdigester as the fermentation device, to study the characteristics of mixed anaerobic fermented 40d biogas of rape seed cake with high solid-state rate and cow dung-sheep manure in 10 different proportions (calculated by dry material). According to the result, it indicated that the entire fermentation process of each mixed treatment is under good operation, which suggested that the mixed fermentation could improve the anaerobic digestion and operation effect, of which, the accumulated biogas yield had high potential when the dry material proportion of rape seed cake and sheep manure was 2∶1, up to 122.92 m3·t−1. Meanwhile, the biogas effect of mixed fermentation by rape seed cake and sheep manure was better than that of the cow dung mixing. The modified Gompertz model indicated that each treatment could fit the process of producing biogas well, of which, the value of maximum biogas yield (Pm) and maximum biogas production rate (Rm) increased with the increase in the addition volume of rape seed cake, while (λ) decreased with the increase in the addition volume of rape seed cake. This study provided valuable reference for resource utilization of rape seed cake and feces.