恶臭污染通常发生在城市生物废弃物的初始分解阶段,包括投掷/收集和运输。然而,市政生物废弃物对气味的影响尚未得到很好的研究。在这项研究中,一个实用的垃圾箱(120升)配有助焊剂室和填充三种类型的市政生物垃圾被用来模拟垃圾存储条件。结果表明,未煮熟的餐厨垃圾(UFW)的恶臭污染物排放速率几乎呈线性增长趋势,在72h达到最大值(3963±149μgkg-1DMh-1)。煮熟的食物垃圾(CFW)从8h到24h迅速增加,然后保持波动,在72小时达到最大值(2026±77μgkg-1DMh-1)。相比之下,家庭厨房垃圾(HKW)在16小时达到最大排放速率(10,396±363μgkg-1DMh-1)。硫化物和醛酮被确定为UFW和CFW的主要气味贡献者,分别。而醛酮和硫化物都是HKW的主要气味因素。此外,微生物多样性分析表明,不动杆菌是UFW的优势属,乳杆菌是CFW和HKW的优势属。此外,很明显,每种有气味的污染物都与两个或多个细菌属显著相关,和大多数细菌属,如不动杆菌,也与多种有气味的污染物显著相关。气味剂组成的变化与微生物组成保持一致。本研究可以为全面了解市政生物废弃物初始分解阶段的气味产生提供必要的证据。它可能有助于制定市政生物废弃物管理系统中的气味控制和减少策略。
Odor pollution often occurs in the initial decomposition stage of municipal biowaste, including throwing/collection and transportation. However, this aspect of odor impact from municipal biowaste has not been well studied. In this study, a practical dustbin (120 L) equipped with flux chamber and filled with three types of municipal biowaste was used to simulate garbage storage conditions. The result indicated that the emission rate of odor pollutants for uncooked food waste (UFW) represented a nearly linear growth trend, reaching the maximum (3963 ± 149 μg kg-1 DM h-1) at 72 h. Cooked food waste (CFW) increased rapidly from 8 h to 24 h, and then remain fluctuated, reached the maximum (2026 ± 77 μg kg-1 DM h-1) at 72 h. Comparatively, household kitchen waste (HKW) reached the maximum emission rate (10,396 ± 363 μg kg-1 DM h-1) at 16 h. Sulfide and aldehydes ketones were identified as dominant odor contributor to UFW and CFW, respectively. While aldehydes ketones and sulfides were both dominant odor contributor to HKW. Moreover, the microbial diversity analysis suggests that Acinetobacter was the dominant genus in UFW, and Lactobacillus was the dominant genus in CFW and HKW. In addition, it was evident that each odorous pollutant was significantly associated with two or more bacterial genera, and most bacterial genera such as Acinetobacter, were also significantly associated with multiple odorous pollutants. The variation of odorants composition kept consistent with microbial composition. The present study could provide essential evidence for a comprehensive understanding of odorant generation in the initial decomposition stage of municipal biowaste. It could contribute to setting out strategies for odor control and abatement in municipal biowaste management systems.