KOH预处理玉米秸秆与猪粪混合厌氧消化过程中性能参数变化规律研究

为了探究KOH预处理玉米秸秆与猪粪厌氧消化过程中性能参数的变化规律，采用间隔卸料的方式在中温条件下进行厌氧共发酵，结果表明：预处理玉米秸秆与猪粪混合后可以改善产气性能，提高厌氧消化效率。经KOH预处理后的玉米秸秆与猪粪混合原料的产气高峰比未预处理的玉米秸秆与猪粪混合原料的产气高峰提前了3~6 d，产气速率和累积甲烷产量分别比未预处理组提高了9.6%~65.6%和13.8%；预处理可使原料消化更彻底，有机物去除率达到71.1%；修正后的Gompertz方程能较好地反映厌氧消化产甲烷过程，其中预处理组的产甲烷率速率（基于挥发性固体含量）比未处理组提高了8.8%。因此，采用KOH预处理玉米秸秆可以提高混合厌氧消化的产甲烷性能。

Anaerobic co-digestion performance of pig manure and KOH-pretreated corn stover

The anaerobic co-digestion of pig manure and KOH-pretreated corn stover has been investigated. The method of sampling every three days was used to analyze the performance parameters during the process of anaerobic digestion. The results showed that after KOH pretreatment, the maximum biogas production peak advanced by 3-6 days and the biogas production rate increased by 9.6%-65.6% compared to co-digestion of the untreated corn stover and pig manure. In addition, the cumulative methane production was 14 013.3 mL, which was 13.8% higher than that of the untreated material. The volatile solid removal ratio was 71.1%. The methane production process in anaerobic digestion could be fitted by the modified Gompertz equation. The methane production rate in the co-digestion of pig manure and KOH-pretreated corn stover group was 8.8% higher than that of the untreated material. Therefore, the anaerobic co-digestion of pig manure and corn stover can be improved by KOH pretreatment of the corn stover.