热水除油对餐厨垃圾产沼气量的影响

Effect of Hot Water Degreasing Oil on Biogas Production of Kitchen Waste

[目的]研究不同温度热水浸泡除油对餐厨垃圾厌氧消化产沼气量的影响。[方法]在40℃条件下,通过厌氧发酵试验分析不同温度热水浸泡除油后餐厨垃圾厌氧消化产气潜力。[结果]热水除油处理降低餐厨垃圾脂肪的含量,提高p H值,提高水解率;常温处理(25℃)、60℃、80℃及100℃热水浸泡除油后餐厨垃圾的单位挥发性固体(VS)产气潜力分别为745、557、603、646 m L/g;随着热水除油温度的提高,餐厨垃圾厌氧发酵的总固体和挥发性固体降解率增大。[结论]热水浸泡除油可提高餐厨垃圾的水解率,提高产气潜力。

Objective] To study the effect of different temperature hot water immersion degreasing on biogas production amount of food waste by anaerobic digestion.[Methods]Under the condition of 40℃,through anaerobic fermentation experiments,after different temperature hot water immersion to degrease,gas production potential of kitchen waste by anaerobic digestion was analyzed. [Results] The hot water eliminating the oil treatment can reduce fat content of kitchen trash,enhance pH value and promote hydrolisis rate;Under the normal temperature（25℃）,60℃,80℃and 100℃,after hot water immersions,the unit volatile solid（VS）potential produced by kitchen trash were 745 mL/g,557 mL/g,603 mL/g and 646 mL/g respectively;along with the increasing of temperature of hot water for degrease,degrades rate of the total solid and the volatile state system of kitchen trash increased. [Conclusion] The hot water immersion eliminates the oil is possible to enhance the hydrolisis rate of kitchen trash,and improve the potential of biogas production.