不同预处理方式对芒萁、商陆厌氧消化性能的影响

采用酸（1.5% H₂SO₄）、碱（2% NaOH）、水热（180℃）三种方式分别对芒萁、商陆进行预处理,考查不同预处理方式对芒萁、商陆厌氧消化性能的影响。结果表明：不同预处理方式对原料木质素去除效果不同,去除率大小依次为碱处理 > 酸处理 > 水热处理,其中碱处理条件下芒萁木质素去除率为52.84%,商陆为48.62%。碱处理条件下原料甲烷产率亦最高,分别为芒萁134.62 mL/g VS、商陆260.40 mL/g VS,相比未处理分别提升53.62%、79.38%;稀酸和水热处理条件下芒萁木质素去除率较低,分别为23.61%、4.52%,商陆则分别为31.68%、5.67%。另外,稀酸和水热处理对芒萁产甲烷也有较好的提升作用,相比未处理分别提升33.08%、38.62%,但对商陆产甲烷并没有明显的改善作用（酸处理仅提升7.83%、水热处理降低3.42%）。相比酸处理和水热处理,碱处理具有更好的预处理效果,商陆比芒萁具有更好的产甲烷潜力。

Effect of Different Pretreatments on Efficiency of Anaerobic Digestion of Dicranopteris Dichotoma and Phytolacca Americana L

The effect of pretreatment methods with acid (1.5% H₂SO₄), alkali (2% NaOH) and liquid hot water (180°C) on anaerobic digestion (AD) performance of Dicranopteris dichotoma and Phytolacca americana L were investigated in this paper. The results indicated that the removal rate of lignin varied with different pretreatments at order: alkali > acid > liquid hot water, 52.84% and 48.62% lignin were removed from the Dicranopteris dichotoma and Phytolacca americana L with alkali pretreatment, respectively. The yield of methane production with alkali pretreatment was also the highest, which was 134.62 mL/g VS and 260.40 mL/g VS, respectively, 53.62% and 79.38% higher than untreated. The lignin removal rate was lower by acid and liquid hot water with Dicranopteris dichotoma, which was 23.61% and 4.52%, respectively, 31.68% and 5.67% for Phytolacca americana L, respectively. In addition, acid and liquid hot water had good performance on methane production with Dicranopteris dichotoma as well, which was 33.08% and 38.62% higher than untreated; however, there was no obviously improvement with Phytolacca americana L (7.83% higher with acid and 3.42% lower with liquid hot water). The alkali pretreatment had significant effect on methane production, and Phytolacca americana L had better potential for methane production than Dicranopteris dichotoma.