在恒温35℃和料液中ω（总固体）为5％的条件下，以农村餐厨垃圾及碱液预处理后的玉米秸秆为原料，以实验室内培养的不产气厌氧活性污泥为接种物，研究餐厨垃圾与玉米秸秆不同配比（干物质质量比分别为1∶3、1∶2、1∶1、2∶1、3∶1和1∶0）混合发酵对产气效果的影响。结果表明，餐厨垃圾与玉米秸秆以1∶2配比的处理CH4累积产量最大，平均为12741 mL，挥发性固体（ VS） CH4产率为299�9 mL·g－1。对发酵过程中pH值的测定结果表明，餐厨垃圾与玉米秸秆混合厌氧消化可以提高厌氧消化系统的缓冲性和稳定性。修正的冈珀茨模型（ Gompertz）能较好地拟合餐厨垃圾－玉米秸秆混合发酵产CH4过程，并且伴随秸秆比率的提高，发酵延滞期和周期逐渐缩短。因此，在餐厨垃圾中加入秸秆可有效提高餐厨垃圾厌氧消化的产气率和生物降解效率。%The present study investigated mesophilic gassy fermentation by food waste mixed with corn straw. Food waste and corn straw were mixed in different level of dry matter ratio, i.e. 1 ∶ 3, 1 ∶ 2, 1 ∶ 1, 2 ∶ 1, 3 ∶ 1, 1 ∶ 0. Under the condition of 35 ℃ and total solid mass fraction (ω) of 5%, the characteristics of gas production on different ratio of food waste and corn straw were evaluated. Results showed that when the ratio of food waste and corn straw is 1 ∶ 2, CH4 average production reached up to 12 741 mL, with a yield of 299�9 mL·g-1 volatile solids(VS).Simultaneously measurement of pH value indicated that co⁃digestion of food waste with corn straw created a well buffering environment for anaerobic fer⁃mentation and improved the stability of gas production. The fermentation process of food waste and corn straw could be well simulated by modified Gompertz equation, indicating that lag phase and duration of fermentation would decrease with in⁃crease in corn straw ratio in the mixture. Therefore, it is suggested that fermentation of food waste with corn straw will sig⁃nificantly improve gas production and biodegradation in the system.
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