Inactivation Kinetics of Indicator Microorganisms during Solar Heat Treatment for Sanitizing Compost from Composting Toilet
Inactivation Kinetics of Indicator Microorganisms during Solar Heat Treatment for Sanitizing Compost from Composting Toilet
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堆肥厕所堆肥消毒过程中指示微生物的灭活动力学
DOI：
10.2965/jwet.14-066
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
N. Funamizu
中科院分区：
文献类型：
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作者：
S. Sossou;M. Sou;Dakoure;N. Hijikata;A. Maiga;N. Funamizu
本研究旨在评价太阳能加热对堆肥的消毒效果。在堆肥厕所产生的堆肥中接种大肠杆菌、粪肠球菌和蛔虫卵，并对其进行太阳能加热。加热是通过将堆肥直接暴露在阳光下并放在太阳箱中进行的。处理后的堆肥采用平板法测定细菌分离数，镜检计数法测定蛔虫卵。利用非线性回归软件工具对微生物的失活动力学进行了建模。结果表明，太阳直射和太阳箱在加热过程中产生的温度分别为中温(>；30°C)和巴氏杀菌(>；70°C)。太阳能箱对加热堆肥中微生物的降解率显著高于阳光直射法。太阳加热堆肥的失活速度较慢，而太阳能箱加热的堆肥灭活速度较快。大肠杆菌似乎对通过太阳能加热达到的破坏温度最敏感。太阳箱内的热十进制衰减迅速，而太阳直射下的热十进制衰减时间较长。太阳能箱加热时温度分布高且均匀，是安全使用堆肥的一种有效选择。
This study aimed to estimate the sanitization effectiveness of compost by solar heating. Compost produced from composting toilet was inoculated with Escherichia coli, Enterococcus faecalis and Ascaris eggs and subjected to solar heating. The heating was performed by direct exposure of compost to sun and in a solar box. From treated compost, the number of isolated bacteria was determined by plating method and the number of Ascaris eggs was determined by microscopy counting. The inactivation kinetics of microorganisms were modeled using nonlinear regression software tool. The result showed that the temperature regime produced by direct sunlight and solar box during heating were categorized as mesophilic (> 30°C) and pasteurization (> 70°C), respectively. The log reduction of microorganisms in heated compost by solar box was significantly higher than that of direct sunlight. The inactivation rate was slow in compost heated by the sun but fast in compost heated by solar box. Escherichia coli appears to be the most sensitive to destruction temperatures achieved by solar heating. The thermal decimal decay occurred rapidly in solar box while it was prolonged with the direct sunlight. The high and uniform temperature distribution obtained with solar box during heating proved to be an efficient option for safe use of compost.
堆肥厕所堆肥过程中几种基质中病原菌的灭活机制
DOI：
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发表时间：
2012
期刊：
影响因子：
--
作者：
Seyram K. Sossou;Rui Tezuka;Nowaki Hijikata;Naoyuki Funamizu
通讯作者：
Naoyuki Funamizu