Kim A-Leum, Park Seunghye, Hong Yoon-Kyoung, Shin Ji-Hwan, Joo Se-Hwan
R&D Center, Cosmicgreen Ltd., Seoul 08390, Korea.
Microorganisms. 2021 May 27;9(6):1156. doi: 10.3390/microorganisms9061156.
Significant quantities of food waste are accumulated globally on an annual basis, with approximately one-third of the food produced (equivalent to 1.3 billion tons of food) being wasted each year. A potential food waste recycling application is its utilization as a soil conditioner or fertilizer, whereby it increases the soil organic content and microbial biomass. This study evaluated the effectiveness of food waste as a microbial resource by analyzing the microbial community composition and isolating plant growth-promoting bacteria (PGPB) in food waste obtained from various sources. High-throughput sequencing identified 393 bacterial operational taxonomic units in the food process waste (FPW) samples. Moreover, the results showed that Firmicutes was abundant in the waste samples, followed by Bacteroidetes and Proteobacteria. A total of 92 bacteria were isolated from FPW. Moreover, the cultivable strains isolated from FPW belonged to the genus Bacillus, followed by Streptomyces and Proteus. Six isolated bacteria exhibited beneficial traits, including indole acetic acid production, antifungal resistance and extracellular lysis. FPW is a valuable microbial resource for isolation of PGPB, and its use as a fertilizer may enable a reduction in chemical fertilizer usage, thereby mitigating the corresponding adverse environmental impacts on sustainable crop development.
全球每年都会积累大量的食物垃圾，每年大约有三分之一的食物（相当于13亿吨食物）被浪费。食物垃圾回收利用的一个潜在应用是将其用作土壤改良剂或肥料，从而增加土壤有机含量和微生物生物量。本研究通过分析微生物群落组成并从各种来源获得的食物垃圾中分离促植物生长细菌（PGPB），评估了食物垃圾作为微生物资源的有效性。高通量测序在食品加工废弃物（FPW）样本中鉴定出393个细菌操作分类单元。此外，结果表明，厚壁菌门在废弃物样本中含量丰富，其次是拟杆菌门和变形菌门。共从FPW中分离出92株细菌。此外，从FPW中分离出的可培养菌株属于芽孢杆菌属，其次是链霉菌属和变形杆菌属。六种分离出的细菌表现出有益特性，包括吲哚乙酸产生、抗真菌性和细胞外裂解。FPW是分离PGPB的宝贵微生物资源，将其用作肥料可能会减少化肥用量，从而减轻对可持续作物发展相应的不利环境影响。
