Alkali pretreatment of anaerobic digestion (AD) was investigated as a strategy to degrade complex organic matter such as fats. AD of food waste (FW) with alkali pretreatment was conducted using batch assays and long-term experiments for 70 days in two reactors. The aim of this study was to compare the impact of alkali pretreatment on solubilization and biogas production and to evaluate the performance in reactors with that of the untreated FW. The alkali pretreatment enhanced the solubilization of organic matter. The best biogas yield (829 mL/g VS) and methane content (65.48%) were obtained by the pretreatment with 1% CaO with the highest P_{i, n} (66.06%) of biodegradable soluble materials. The long-term reactors with pretreatment performed more steadily with higher biogas production under organic loading rates (OLR) over 5 g VS/(L⋅d). The bacterial community structure was different under various conditions. Methanosaeta and Methanospirillum were the dominant archaea in this study, while Methanosaeta increased in R1 at OLR of 6 g VS/(L⋅d). The study concluded that alkali pretreatment with 1% CaO appeared as a potential strategy for AD of FW.

厌氧消化（AD）的碱预处理已被研究为降解复杂有机物质（例如脂肪）的策略。在两个反应器中，使用批处理试验和长期实验对食品进行了碱预处理的AD（FW）70天。这项研究的目的是比较碱预处理对增溶和沼气生产的影响，并评估反应堆和未处理的氟化氢在反应器中的性能。碱预处理提高了有机物的溶解度。用1％CaO预处理，可获得最高的沼气产量（829 mL / g VS）和甲烷含量（65.48％），P _i，n（66.06％）可生物降解的可溶性物质。经过预处理的长期反应器在有机负荷率（OLR）超过5 g VS /（L⋅d）的情况下，随着更高的沼气产量，运行更加稳定。在各种条件下，细菌群落结构是不同的。在这项研究中，甲烷菌属和甲烷螺旋菌是主要的古细菌，而当OLR为6 g VS /（L⋅d）时，甲烷菌类在R1中的含量增加。该研究得出结论，用1％CaO碱预处理是FW AD的潜在策略。