摘要
餐余垃圾高油高盐特征是影响其堆肥化效果的重要因素。从超高温环境下培养出以芽孢杆菌属(Bacillus)为核心的超高温菌群,考察超高温菌群对餐余垃圾好氧堆肥化过程中堆体温度、物料含水率、pH、种子发芽指数等的影响,并分析好氧堆肥化过程中微生物种群的变化。结果表明,添加超高温菌群后,餐余垃圾好氧堆肥化温度最高可达83℃,75℃以上温度可以维持6 d,含水率由50.23%下降至26.71%,油脂、盐分质量分数分别从1.94%、3.62%降低至0.15%、0.88%,降解率较未添加超高温菌群的对照组分别提升了15.30百分点、17.29百分点。芽孢杆菌属和芽孢八叠球菌属(Sporosarcina)是维持超高温的重要菌属,堆肥芽孢杆菌属(Compostibacillus)和芽孢八叠球菌属是提高油脂、盐分降解效率的重要菌属。超高温菌好氧堆肥化技术处理餐余垃圾相较于传统好氧堆肥化技术能有效提高餐余垃圾中油脂、盐分的降解效率,在一定程度上促进了相关菌种的生长,提高堆体腐熟程度。
The high grease and salt of kitchen waste is important factors affecting its composting effectiveness.Bacillus centered ultra-high temperature bacteria was cultivated from ultra-high temperature environments.The effects of ultra-high temperature flora on composting temperature,material moisture content,pH,and seed germination index during aerobic composting of kitchen waste were investigated,and the changes of microbial populations during aerobic composting were analyzed.The results showed that the aerobic composting temperature of kitchen waste could reach up to 83℃after the addition of ultra-high temperature bacterial,and it could be maintained above 75℃for 6 d,the moisture content decreased from 50.23%tO_(2)6.71%,the grease and salt mass fraction was reduced from 1.94%and 3.62%to 0.15%and 0.88%.Their degradation rate was improved by 15.30 percents point and 17.29 percents point compared with the control group without the addition of ultra-high temperature bacterial.Bacillus and Sporosarcina were important genera for the maintenance of ultra-high temperature,while Compostibacillus and Sporosarcina were important for improving the degradation efficiency of grease and salt.Compared with the traditional aerobic composting technology,aerobic composting technology of ultra-high temperature bacteria could effectively improve the degradation efficiency of grease and salt in kitchen waste,and to a certain extent,promote the growth of related bacterial species to improve the maturity of compost.
作者
刘闯
姜悦
吴志博
侯文涛
LIU Chuang;JIANG Yue;WU Zhibo;HOU Wentao(School of Municipal and Environmental Engineering,Shenyang University of Architecture,Shenyang Liaoning 110168)
出处
《环境污染与防治》
CAS
CSCD
北大核心
2024年第5期613-617,625,共6页
Environmental Pollution & Control
基金
国家重点研发计划项目(No.2018YFD1100500)。
关键词
超高温
好氧堆肥化
餐余垃圾
油脂
盐分
微生物种群
ultra-high temperature
aerobic composting
kitchen waste
grease
salt
microbial populations
