Montecchio D, Gallipoli A, Gianico A, Mininni G, Pagliaccia P, Braguglia C M
a Water Research Institute , IRSA - CNR, Area della Ricerca RM1 , Roma , Italy.
Environ Technol. 2017 Jun;38(11):1452-1464. doi: 10.1080/09593330.2016.1233293. Epub 2016 Sep 27.
In order to enhance anaerobic biodegradability of food waste (FW), thermal pretreatment was applied. The effectiveness in terms of biodegradability extent and process rate improvement was investigated. To this aim, Biomethane Potential tests were carried out under mesophilic and thermophilic conditions. The IWA anaerobic digestion Model 1 (ADM1), a powerful tool for modeling the anaerobic digestion (AD) of different substrates, was implemented to predict the methane production. Disintegration constant (k_dis) and maximum acetate uptake rate (km_ac) were identified as the most sensitive parameters and were calibrated over the observed methane production. Pretreatment improvement was more evident in enhancing parameters related to the process rate, such as solubilization extent (+153%) and disintegration constant (+18%), rather than increasing substrate biodegradability. Thermophilic conditions proved to be effective in speeding up the whole AD process, since all the kinetics were significantly improved (disintegration rate increased up to fivefold). Furthermore, it was demonstrated that, after k_dis and km_ac calibration, default thermophilic ADM1 parameters can be suitable to model FW digestion.
为提高食物垃圾（FW）的厌氧生物降解性，进行了热预处理。研究了其在生物降解程度和提高处理速率方面的效果。为此，在中温和高温条件下进行了生物甲烷潜力测试。采用国际水协厌氧消化模型1（ADM1）这一用于模拟不同底物厌氧消化（AD）的强大工具来预测甲烷产量。崩解常数（k_dis）和最大乙酸摄取速率（km_ac）被确定为最敏感参数，并根据观测到的甲烷产量进行校准。预处理在提高与处理速率相关的参数方面更为明显，如溶解程度（提高153%）和崩解常数（提高18%），而不是提高底物的生物降解性。高温条件被证明对加速整个厌氧消化过程有效，因为所有动力学都得到显著改善（崩解速率提高了五倍）。此外，研究表明，在对k_dis和km_ac进行校准后，默认的高温ADM1参数可适用于模拟食物垃圾的消化。
