Bio-based production of materials from waste streams is a pivotal aspect in a circular economy. This study aimed to investigate the influence of inoculum (three different sludge taken from anaerobic digestors), pH (5 & 10) and retention time on production of total volatile fatty acids (VFAs), VFA composition as well as the microbial community during anaerobic digestion of food waste. The highest VFA production was ∼22000 ± 1036 mg COD/L and 12927 ± 1029 mg COD/L on day 15 using the inoculum acclimated to food waste at pH 10 and pH 5, respectively. Acetic acid was the dominant VFA in the batch reactors with initial alkaline conditions, whereas both propionic and acetic acids were the dominant products in the acidic condition. Firmicutes, Chloroflexi and Bacteroidetes had the highest relative abundance in the reactors. VFA generation was positively correlated to the relative abundance of Firmicutes.

废物流中的生物基材料生产是循环经济中的关键方面。这项研究旨在调查接种物（厌氧消化池中的三种不同污泥），pH（5和10）和保留时间对厌氧消化过程中总挥发性脂肪酸（VFA）的产生，VFA组成以及微生物群落的影响。食物浪费。在第15天使用分别适应pH 10和pH 5的食物垃圾的接种物，最高VFA产量约为22000±1036 mg COD / L和12927±1029 mg COD / L。在初始碱性条件下，乙酸是间歇反应器中的主要VFA，而在酸性条件下，丙酸和乙酸都是主要的产物。硬膜菌，绿弯曲菌和拟杆菌在反应堆中的相对丰度最高。VFA的产生与Firmicutes的相对丰度呈正相关。