Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400044, China; College of Environment and Ecology, Chongqing University, Chongqing 400044, China.
Chongqing Environment and Sanitation Group Co., Ltd., Chongqing 401122, China.
Bioresour Technol. 2024 Sep;408:131221. doi: 10.1016/j.biortech.2024.131221. Epub 2024 Aug 5.
Food waste (FW) and its biogas residue were considered as sources of terrestrial microplastics (MPs) and phthalic acid esters (PAEs) contamination. However, there was a lack of research and understanding of the MPs and PAEs pollution problem in FW dry anaerobic digestion process (DADP). The MPs and PAEs in three stages of the DADP with the largest monomer disposal scale in China were identified. At the biogas residue extrusion stage, MPs abundance and PAEs concentration reached the highest values, which were 3.63 ± 0.45 × 10 N·kg and 3.62 ± 0.72 mg·kg, respectively. Furthermore, there was a significant positive correlation between MPs and PAEs throughout the process (p < 0.05). Although bacteria and fungi with plastic degradation potential were present in all stages, the contamination problem of MPs and PAEs cannot be completely solved through DADP. This study provides a scientific basis for preventing and controlling the pollution of MPs and PAEs.
食物垃圾（FW）及其沼气残留物被认为是陆地微塑料（MPs）和邻苯二甲酸酯（PAEs）污染的来源。然而，FW 干厌氧消化工艺（DADP）中 MPs 和 PAEs 污染问题的研究和认识还很缺乏。本研究对中国单体处理规模最大的 DADP 的三个阶段中的 MPs 和 PAEs 进行了鉴定。在沼气残渣挤压阶段，MPs 丰度和 PAEs 浓度达到最高值，分别为 3.63±0.45×10 N·kg 和 3.62±0.72 mg·kg。此外，整个过程中 MPs 和 PAEs 之间存在显著的正相关关系（p<0.05）。尽管所有阶段都存在具有塑料降解潜力的细菌和真菌，但 DADP 并不能完全解决 MPs 和 PAEs 的污染问题。本研究为预防和控制 MPs 和 PAEs 的污染提供了科学依据。
