Micro-oxygen pretreatment of kitchen waste was done to improve the gas production efficiency of anaerobic fermentation and shorten the fermentation cycle of kitchen waste. The results demonstrated that with an oxygen supply of 20 mL, the peak gas production increased from 498 to 601 mL, and the theoretical gas production increased by 4.5 mL/g VS (volatiles solid) compared with those of the control group R1–R4. The anaerobic fermentation entered the late stage on day 25, which was 13 days earlier than that of the control group. The chemical oxygen demand and ammonia nitrogen contents in the treatment groups of R1–R4 were relatively stable. An oxygen supply of 20 mL was conducive to stimulating the facultative anaerobes, promoting the decomposition of nitrogenous compounds and organic matter, and improving the anaerobic fermentation efficiency. A lesser amount of oxygen (≤ 15 mL) was unable to effectively improve the gas production efficiency of anaerobic fermentation, although it exerted a certain inhibitory effect on anaerobic fermentation.

对厨余垃圾进行微氧预处理，提高了厌氧发酵产气效率，缩短了厨余垃圾的发酵周期。结果表明，与对照组R1–R4相比，在供氧为20 mL的情况下，峰值产气量从498增加到601 mL，理论产气量增加了4.5 mL / g VS（固体挥发物）。厌氧发酵在第25天进入后期，比对照组提前13天。R1-R4处理组的化学需氧量和氨氮含量相对稳定。20 mL的氧气供应有利于刺激兼性厌氧菌，促进含氮化合物和有机物的分解，并提高厌氧发酵效率。