超声与酸预处理协同作用强化一体式厌氧消化从豆腐加工废弃物中产生物氢气。
Combination of ultrasonic and acidic pretreatments for enhancing biohythane production from tofu processing residue via one-stage anaerobic digestion.
机构信息
College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China; Biological Engineering Department, Agricultural Engineering Research Institute, Giza, Egypt.
State Key Laboratory of Pollution Control and Recourses Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; Department of Agricultural Engineering, Faculty of Agriculture, Suez Canal University, Ismailia 41522, Egypt.
出版信息
Bioresour Technol. 2022 Jan;344(Pt B):126244. doi: 10.1016/j.biortech.2021.126244. Epub 2021 Oct 31.
Tofu processing residues (TPR) have received more attention as a source of bioenergy. However, their low solubility has hindered biohythane generation. Consequently, the ultrasonic and HSO pretreatments were combined and compared for the first time to improve the hydrolysis of organic matter and carbohydrate and increase free amino nitrogen generation from TPR. Besides, the impact of pretreatments on biohythane generation was investigated. Under the optimal conditions of 7.54% substrate level, 8% HSO concentration, 80 °C and 50 min, the coincident ultrasonic-HSO pretreatment enriched the contents of soluble chemical oxygen demand, reducing sugar, and free amino nitrogen to 49675 mg/L, 26 g/L, and 1721 mg/L, respectively, greater than individual pretreatments. Also, Biohythane yield increased by 4.24-13.61% over control (389.42 ± 23.7 ml/g-VS). Furthermore, hydrogen yield at 42.5 ± 2.08 and 28.1 ± 1.07 ml/g-VS and sulfate removal efficiency at 93 and 92% were significantly improved with ultrasonic-HSO and HSO pretreatments, respectively, indicating acidogenic and sulfidogenic activity enhancement.
豆腐加工残渣（TPR）作为生物能源的来源受到了更多的关注。然而，其低溶解度阻碍了生物氢烷的生成。因此，首次将超声和 HSO 预处理相结合并进行了比较，以提高 TPR 中有机物和碳水化合物的水解率，并增加游离氨基氮的生成。此外，还研究了预处理对生物氢烷生成的影响。在底物水平为 7.54%、HSO 浓度为 8%、80°C 和 50 min 的最佳条件下，协同超声-HSO 预处理使可溶性化学需氧量、还原糖和游离氨基氮的含量分别富集到 49675 mg/L、26 g/L 和 1721 mg/L，均高于单一预处理。此外，生物氢烷产量比对照（389.42±23.7 ml/g-VS）提高了 4.24-13.61%。此外，超声-HSO 和 HSO 预处理分别使氢气产量提高了 42.5±2.08 和 28.1±1.07 ml/g-VS，硫酸盐去除效率提高了 93%和 92%，表明产酸和产硫活性增强。
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