Pathogen Reduction Potential in Anaerobic Digestion of Organic Fraction of Municipal Solid Waste and Food Waste
Pathogen Reduction Potential in Anaerobic Digestion of Organic Fraction of Municipal Solid Waste and Food Waste
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城市固体废物和食物垃圾有机部分厌氧消化的病原体减少潜力
DOI：
10.3390/molecules25020275
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发表时间：
2020
期刊：
影响因子：
4.6
通讯作者：
Hanna Pińkowska
中科院分区：
文献类型：
--
作者：
Przemysław Seruga;M. Krzywonos;Z. Paluszak;A. Urbanowska;H. Pawlak;Łukasz Niedźwiecki;Hanna Pińkowska
厌氧消化（AD）是处理废物的常用方法。无论使用何种类型的发酵状态（肥料、固态发酵的原料、热处理的原料），有效的病原体风险消除，即使在高病原体浓度的情况下也是至关重要的。沙门氏菌森夫滕贝格W 775、肠球菌、和猪蛔虫卵进行了实验室规模的高温厌氧消化和确认的规模化操作中的灭菌。除消毒效率外，还根据pH值、干物质含量、酸度、碱度和脂肪酸含量的测定验证了AD工艺的性能和稳定性。对于沙门氏菌森夫滕贝格W 775、肠球菌属，和猪蛔虫，分别在实验室试验。在波兰的MBT工厂使用1500 m3 Kompogas®反应器进行的全规模测试中证实了所获得的结果。实现了对无菌状态的消毒。此外，该工艺稳定。pH值、悬浮固体和铵含量分别稳定在8.5、35%和3.8 g/kg。观察到乙酸含量在几乎0.8和超过1.1 g/kg之间，而丙酸浓度在约100 mg/kg的最大水平。AD条件可积极影响病原体的消除。基于这些结果，可以发现在嗜热条件下的厌氧消化导致高卫生效率。
Anaerobic digestion (AD) is a commonly used method of processing waste. Regardless of the type of the used digestate (fertilizer, feedstock in case of solid-state fermentation, raw-material in case of thermal treatment) effective pathogen risk elimination, even in the case of high pathogen concentration is essential. An investigation of the survival time and inactivation rate of the Salmonella Senftenberg W775, Enterococcus spp., and Ascaris suum eggs during thermophilic anaerobic digestion performed on laboratory scale and confirmation of hygienization in full-scale operation were performed in this study. Except for sanitization efficiency, the AD process performance and stability were also verified based on determination of pH value, dry matter content, acidity, alkalinity, and content of fatty acids. The elimination of pathogen was met within 6.06 h, 5.5 h, and about 10 h for the Salmonella Senftenberg W775, Enterococcus spp., and Ascaris suum, respectively in the laboratory trials. The obtained results were confirmed in full-scale tests, using 1500 m3 Kompogas® reactors, operating in MBT Plant located in Poland. Sanitization of the digestate was achieved. Furthermore, the process was stable. The pH value, suspended solids, and ammonium content remained stable at 8.5, 35%, and 3.8 g/kg, respectively. The acetic acid content was noted between almost 0.8 and over 1.1 g/kg, while the concentration of propionic acid was noted at maximum level of about 100 mg/kg. The AD conditions could positively affect the pathogen elimination. Based on these results it can be found that anaerobic digestion under thermophilic conditions results in high sanitation efficiency.