College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China.
Institute of Desertification Studies, Chinese Academy of Forestry, Beijing 100091, China.
Bioresour Technol. 2020 Jan;295:122277. doi: 10.1016/j.biortech.2019.122277. Epub 2019 Oct 18.
Microbial community in in-situ waste sludge anaerobic digestion with alkalization for enhancement of nutrient recovery and energy generation was studied. Firmicutes, Proteobacteria and Bacteroidetes phylum became the majority in the microbial community, especially Firmicutes showed the predominate role in the community due to its thick cell wall structure, potential ability hydrolysis and hydrogenogenic acidogenesis. Anaerobic digestion with alkalization caused the obvious microbial diversity decrease, and over 50% of minority bacteria grew up in quantity from original sludge. Phylum of Firmicutes developed by themselves having few interactions with other bacteria, partly contributing to its rapid growth in anaerobic digestion with alkalization. The decrease of hydrocarbon degradation, and the increase of both fermentation and reductive acetogenesis in microbial community, indicating the promotion of short chain fatty acids production, especially acetic acid which is the key intermediate products for nutrient recovery and energy generation.
研究了原位废污泥厌氧消化的微生物群落，通过碱化作用来增强营养物质回收和能源生成。厚壁菌门、变形菌门和拟杆菌门成为微生物群落中的主要门类，尤其是厚壁菌门由于其细胞壁结构厚实、潜在的水解和产氢酸化能力，在群落中表现出主导作用。碱化作用的厌氧消化导致微生物多样性明显下降，超过 50%的少数细菌数量从原始污泥中增加。厚壁菌门自行发展，与其他细菌的相互作用较少，这在一定程度上促成了其在碱化厌氧消化中的快速生长。微生物群落中烃类降解减少，发酵和还原乙酰生成增加，表明短链脂肪酸生成的促进，特别是乙酸，它是营养物质回收和能源生成的关键中间产物。
