SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2021, Vol. 39 ›› Issue (11): 255-260.DOI: 10.1016/j.cjche.2020.10.012

• Energy Science and Technology • 上一篇    下一篇

Lower temperature hydrothermal pretreatment improves the anaerobic digestion performance of spent cow bedding

Xitong Wang1, Hairong Yuan1, Xiaocong Song2, Xiujin Li1, Xiaoyu Zuo1   

  1. 1 Beijing Center for Pollution Control and Resource Recovery, Beijing University of Chemical Technology, Beijing 100029, China;
    2 Chinese Research Academy of Environmental Sciences, Beijing 100029, China
  • 收稿日期:2020-07-28 修回日期:2020-10-13 出版日期:2021-11-28 发布日期:2021-12-27
  • 通讯作者: Hairong Yuan
  • 基金资助:
    This work was supported by the Fundamental Research Funds for the Central Universities (grant numbers JD2006).

Lower temperature hydrothermal pretreatment improves the anaerobic digestion performance of spent cow bedding

Xitong Wang1, Hairong Yuan1, Xiaocong Song2, Xiujin Li1, Xiaoyu Zuo1   

  1. 1 Beijing Center for Pollution Control and Resource Recovery, Beijing University of Chemical Technology, Beijing 100029, China;
    2 Chinese Research Academy of Environmental Sciences, Beijing 100029, China
  • Received:2020-07-28 Revised:2020-10-13 Online:2021-11-28 Published:2021-12-27
  • Contact: Hairong Yuan
  • Supported by:
    This work was supported by the Fundamental Research Funds for the Central Universities (grant numbers JD2006).

摘要: The anaerobic digestion (AD) performance of spent cow bedding was investigated with different hydrothermal pretreatment (HP) conditions. Spent cow bedding was pretreated with low temperatures (50, 70, and 90℃) and different pretreatment times (2-72 h) with ammonia and without ammonia. The results showed that spent cow bedding was a good raw material for AD. After pretreatment, the concentration of volatile fatty acids (VFAs) in the group of hydrothermal pretreatments with ammonia (HPA) was higher than that in the HP group at the same pretreatment temperature and time. The optimal pretreatment condition was achieved with an HPA of 50℃ holding for 72 h. At the optimal condition, the highest concentration of VFAs was 1.58-10.85 times higher than that of the other pretreated groups. The highest hemicellulose and lignin removal rates were 58.07% and 10.32%, respectively. The highest methane yield was 163.0 ml·(g VS)-1, which was 48.9% higher than that of the untreated group. The VFAs, pH, and reducing sugars showed positive relationships with the methane yield. Therefore, HP at low temperature can enhance the AD performance of spent cow bedding.

关键词: Hydrothermal pretreatment (HP), Spent cow bedding, Anaerobic digestion (AD), Methane yield

Abstract: The anaerobic digestion (AD) performance of spent cow bedding was investigated with different hydrothermal pretreatment (HP) conditions. Spent cow bedding was pretreated with low temperatures (50, 70, and 90℃) and different pretreatment times (2-72 h) with ammonia and without ammonia. The results showed that spent cow bedding was a good raw material for AD. After pretreatment, the concentration of volatile fatty acids (VFAs) in the group of hydrothermal pretreatments with ammonia (HPA) was higher than that in the HP group at the same pretreatment temperature and time. The optimal pretreatment condition was achieved with an HPA of 50℃ holding for 72 h. At the optimal condition, the highest concentration of VFAs was 1.58-10.85 times higher than that of the other pretreated groups. The highest hemicellulose and lignin removal rates were 58.07% and 10.32%, respectively. The highest methane yield was 163.0 ml·(g VS)-1, which was 48.9% higher than that of the untreated group. The VFAs, pH, and reducing sugars showed positive relationships with the methane yield. Therefore, HP at low temperature can enhance the AD performance of spent cow bedding.

Key words: Hydrothermal pretreatment (HP), Spent cow bedding, Anaerobic digestion (AD), Methane yield