碱度来源对食物垃圾厌氧消化稳定性的影响。
Effects of alkalinity sources on the stability of anaerobic digestion from food waste.
作者信息
Chen Shujun, Zhang Jishi, Wang Xikui
机构信息
School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology, China.
School of Environmental Science and Engineering, Qilu University of Technology, China
出版信息
Waste Manag Res. 2015 Nov;33(11):1033-40. doi: 10.1177/0734242X15602965. Epub 2015 Sep 21.
This study investigated the effects of some alkalinity sources on the stability of anaerobic digestion (AD) from food waste (FW). Four alkalinity sources, namely lime mud from papermaking (LMP), waste eggshell (WES), CaCO3 and NaHCO3, were applied as buffer materials and their stability effects were evaluated in batch AD. The results showed that LMP and CaCO3 had more remarkable effects than NaHCO3 and WES on FW stabilization. The methane yields were 120.2, 197.0, 156.2, 251.0 and 194.8 ml g(-1) VS for the control and synergistic digestions of CaCO3, NaHCO3, LMP and WES added into FW, respectively. The corresponding final alkalinity reached 5906, 7307, 9504, 7820 and 6782 mg l(-1), while the final acidities were determined to be 501, 200, 50, 350 and 250 mg l(-1), respectively. This indicated that the synergism between alkalinity and inorganic micronutrients from different alkalinity sources played an important role in the process stability of AD from FW.
本研究调查了某些碱度来源对食物垃圾厌氧消化（AD）稳定性的影响。将四种碱度来源，即造纸厂的石灰泥（LMP）、废弃蛋壳（WES）、CaCO₃和NaHCO₃用作缓冲材料，并在批次厌氧消化中评估它们的稳定效果。结果表明，LMP和CaCO₃对食物垃圾的稳定化作用比NaHCO₃和WES更显著。对于添加到食物垃圾中的CaCO₃、NaHCO₃、LMP和WES的对照和协同消化，甲烷产量分别为120.2、197.0、156.2、251.0和194.8 ml g⁻¹ VS。相应的最终碱度分别达到5906、7307、9504、7820和6782 mg l⁻¹，而最终酸度分别测定为501、200、50、350和250 mg l⁻¹。这表明来自不同碱度来源的碱度与无机微量营养素之间的协同作用在食物垃圾厌氧消化的过程稳定性中起重要作用。
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