城镇垃圾厌氧消化中纤维素酶酶活变化与产气量间关系的研究

Study on Relationship between Cellulase Activity Change and Gas Production Amount in Anaerobic Digestion of the Urban Waste

[目的]研究城镇垃圾厌氧消化中纤维素酶酶活变化与产气量间的关系。[方法]以城镇有机生活垃圾为原料,采用批量发酵工艺,在35℃下研究城镇有机生活垃圾厌氧消化过程中纤维素酶酶活变化与日产气量之间的关系。[结果]随消化进行,纤维素酶酶活升高,产气量增加;酶活降低,产气量减少。当日产气量处于高峰期时,纤维素酶酶活水平并不是最高的,而是在次产气高峰期时,纤维素酶酶活水平达到最高,为5.3 mg葡萄糖/(ml·min)。[结论]厌氧消化次产气高峰期与较难降解的纤维素类物质有关。

[Objective] The research aimed to study relationship between cellulase activity change and gas production amount in anaerobic digestion of the urban waste.[Method] Urban organic household waste as material,by using batch fermentation process,relationship between cellulase activity change and daily gas production amount in anaerobic digestion of the urban organic household waste was studied at 35 ℃.[Result] As digestion conducted,cellulase activity rose,and gas production amount increased.When cellulase activity declined,gas production amount decreased.When daily gas production amount was at peak period,cellulase activity was not the highest.At the second gas production peak period,cellulase activity reached 5.3 mg glucose/（ml · min） and was the maximum.[Conclusion] The second gas production peak period of anaerobic digestion was related to cellulose-based substance which was difficult to be degraded.