Inactivation Regularity of Bacillus cereus on Composting Waste of Catering Food
Abstract: Objective: This thesis focuses on building small-scale processing of domestic waste contained Bacillus cereus biosafety static compost, and exploring the degradation efficiency of Bacillus cereus to evaluate the safety and feasibility of this compost system. Method: Caw manure and straw were used as major material to build a composting system to dispose chicken carcasses. We examined temperature, pH value and moisture to evaluate this system. Result: By using domestic wastes and Bacillus cereus mixture as model, we enumerated Bacillus cereus in both samples in compost piles and in room temperature controls. During the forty-day composting period, the temperature reached 50˚C on second day after composting. It had maintained above 55 for 6 continuous days. The physical and chemical properties, moisture (59% - 69%) and pH (8.5 - 9.0) are suitable for composting. The results of enumeration and certification test shows that, Bacillus cereus mixed with manure in composting condition were inactive within 12 days. Even when the temperature of composting pile dropped below 40˚C, the existence of this pathogen was still negative. In those samples mixed without manure in compost piles, Bacillus cereus survived after 18 days. Conclusion: For Bacillus cereus are fully inactive rapidly, this inexpensive and relatively simple composting system shows its advantage to be a solution of domestic wastes contaminated by Bacillus cereus. The factors of inactivity are the whole condition pressure of composting including heat, the activity of microbes and the change of the character of composting material.
文章引用: 曹际娟 , 王金玲 , 简中友 , 王 爽 , 金礼吉 (2012) 餐饮垃圾堆肥中蜡样芽孢杆菌的灭活规律。 生物过程， 2， 139-143. doi: 10.12677/BP.2012.24022
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