Anaerobic fermentation is an effective way to dispose and recycle vegetables wastes (VW) resources for volatile fatty acid (VFA) production. Herein, the organic matter composition of VW influence the VFA yield and distribution. To investigate the effect of VW types on the performance of the VFA production, batch anaerobic fermentation was carried out with four typical VW (potato, carrot, celery, and Chinese cabbage) at mesophilic conditions. The results showed that the highest VFA yield (452 mg COD/g VS_feed) was achieved from potato peels, which was 40.1%, 21.5%, and 124.9% higher than that of carrots, celery, and Chinese cabbage, respectively. Both the hydrolysis and acidification of carrots was fast, while its maximum VFA/SCOD ratio was only 71.6%. The acidification of celery started slowly, and the yield of hexanoic acid increased rapidly in the later stage of fermentation. Due to the low initial pH, the VFA yield of Chinese cabbage was inhibited, although the ethanol yield reached 7577.04 mg COD/L. According to the VFA profile, the fermentation of potato peels, carrots, celery, and Chinese cabbage can be classified as propionate-type, butyrate-type, mixed-acid type, and ethanol-acetate type metabolic pathway, respectively. This study could provide guidance for desired VFA production from specific VW and more efficient VFA production from the co-fermentation of VW.

厌氧发酵是处置和回收蔬菜废物（VW）资源以生产挥发性脂肪酸（VFA）的有效方法。在此，大众汽车的有机物组成会影响大众汽车的产量和分布。为了研究大众汽车类型对大众汽车生产能力的影响，在中温条件下用四种典型大众汽车（马铃薯，胡萝卜，芹菜和大白菜）进行了分批厌氧发酵。结果表明，最高VFA产量（452 mg COD / g VS_饲料）是由土豆皮制成的，分别比胡萝卜，芹菜和大白菜高40.1％，21.5％和124.9％。胡萝卜的水解和酸化作用都很快，而其最大VFA / SCOD比例仅为71.6％。芹菜的酸化开始缓慢，在发酵后期，己酸的产量迅速增加。尽管乙醇的产量达到了7577.04 mg COD / L，但由于初始pH值较低，大白菜的VFA产量受到抑制。根据VFA曲线，马铃薯皮，胡萝卜，芹菜和大白菜的发酵可分别分为丙酸类，丁酸类，混合酸类和乙醇乙酸类代谢途径。