The impact of temperature (20, 35, 45, 55, 70 °C) on volatile fatty acid (VFA) production from biowaste collected at a mechanical–biological treatment plant was analysed. Additionally, relevant streams of the treatment plant were characterised to assess seasonality effects and conceive the integration of a fermentation unit. Batch fermentation tests at 35 °C showed the highest VFA yields (0.49–0.59 gCOD_VFA/gVS). The VFA yield at 35 °C was 2%, 6%, 10% and 14% higher than at 55, 45, 20 and 70 °C, respectively. The VFA profile was not affected by the fermentation temperature nor seasonality and was dominated by acetic, propionic and butyric acid (75–86% COD_VFA). The concentration of non-VFA soluble COD and ammoniacal nitrogen in the fermentation liquor increased with temperature. The fermentation unit in the treatment plant was conceived after the pulper and hydrocyclones and before the anaerobic digester, while the fermenter temperature depends on the VFA application.

分析了温度（20、35、45、55、70°C）对在机械生物处理厂收集的生物废物中挥发性脂肪酸（VFA）产生的影响。另外，表征处理厂的相关物流以评估季节性影响并构想发酵单元的整合。在35°C下分批发酵测试显示最高的VFA产量（0.49–0.59 gCOD _VFA / gVS）。35°C时的VFA产率分别比55、45、20和70°C时高2％，6％，10％和14％。VFA曲线不受发酵温度和季节的影响，主要受乙酸，丙酸和丁酸（75–86％COD _VFA）。发酵液中非VFA可溶性COD和氨氮的浓度随温度升高而增加。处理厂中的发酵装置是在碎浆机和水力旋流器之后，厌氧消化器之前构思的，而发酵罐的温度取决于VFA的应用。