SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2023, Vol. 62 ›› Issue (10): 114-123.DOI: 10.1016/j.cjche.2023.04.014

• Full Length Article • 上一篇    下一篇

Investigates of substrate mingling ratio and organic loading rate of KOH pretreated corn stover and pig manure in batch and semi-continuous system: Anaerobic digestion performance and microbial characteristics

Chenyang Zhu1, Ruoran Qu2, Xiujin Li1, Xiaoyu Zuo1, Hairong Yuan1   

  1. 1. State Key Laboratory of Chemical Resource Engineering, Department of Environmental Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China;
    2. Sinochem Commerce Co., Ltd, Beijing 100045, China
  • 收稿日期:2022-12-27 修回日期:2023-04-09 出版日期:2023-10-28 发布日期:2023-12-23
  • 通讯作者: Xiujin Li,E-mail:xjli@mail.buct.edu.cn;Hairong Yuan,E-mail:yuanhairong75@163.com
  • 基金资助:
    The authors are grateful to the fund supports from the Fundamental Research Funds for the Central Universities (JD2326).

Investigates of substrate mingling ratio and organic loading rate of KOH pretreated corn stover and pig manure in batch and semi-continuous system: Anaerobic digestion performance and microbial characteristics

Chenyang Zhu1, Ruoran Qu2, Xiujin Li1, Xiaoyu Zuo1, Hairong Yuan1   

  1. 1. State Key Laboratory of Chemical Resource Engineering, Department of Environmental Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China;
    2. Sinochem Commerce Co., Ltd, Beijing 100045, China
  • Received:2022-12-27 Revised:2023-04-09 Online:2023-10-28 Published:2023-12-23
  • Contact: Xiujin Li,E-mail:xjli@mail.buct.edu.cn;Hairong Yuan,E-mail:yuanhairong75@163.com
  • Supported by:
    The authors are grateful to the fund supports from the Fundamental Research Funds for the Central Universities (JD2326).

摘要: The effects of substrate mingling ratio (SMR) (1:1, 1:2, 1:3, 3:1, and 2:1) and organic loading rate (OLR) (50–90 g total solids per liter per day) on anaerobic co-digestion performance and microbial characteristics were investigated for pig manure (PM) and pretreated/untreated corn stover in batch and semi-continuous anaerobic digestion (AD) system. The results showed that SMR and pretreatment affected co-digestion performance. The maximum cumulative methane yield of 428.5 ml·g-1 (based on volatile solids (VS)) was obtained for PCP13, which was 35.7% and 40.0% higher than that of CSU and PM. In the first 5 days, the maximum methane yield improvement rate was 378.1% for PCP13. The daily methane yield per gram VS of PCP13 was 11.4%–18.5% higher than that of PCU13. Clostridium_sensu_stricto_1, DMER64, and Bacteroides and Methanosaeta, Methanobacterium, and Methanospirillum had higher relative abundance at the genus level. Therefore, SMR and OLR are important factor affecting the AD process, and OLR can affect methane production through volatile fatty acids.

关键词: Substrate mingling ratio, Organic loading rate, Co-digestion, Corn stover, Pig manure, Microbial community

Abstract: The effects of substrate mingling ratio (SMR) (1:1, 1:2, 1:3, 3:1, and 2:1) and organic loading rate (OLR) (50–90 g total solids per liter per day) on anaerobic co-digestion performance and microbial characteristics were investigated for pig manure (PM) and pretreated/untreated corn stover in batch and semi-continuous anaerobic digestion (AD) system. The results showed that SMR and pretreatment affected co-digestion performance. The maximum cumulative methane yield of 428.5 ml·g-1 (based on volatile solids (VS)) was obtained for PCP13, which was 35.7% and 40.0% higher than that of CSU and PM. In the first 5 days, the maximum methane yield improvement rate was 378.1% for PCP13. The daily methane yield per gram VS of PCP13 was 11.4%–18.5% higher than that of PCU13. Clostridium_sensu_stricto_1, DMER64, and Bacteroides and Methanosaeta, Methanobacterium, and Methanospirillum had higher relative abundance at the genus level. Therefore, SMR and OLR are important factor affecting the AD process, and OLR can affect methane production through volatile fatty acids.

Key words: Substrate mingling ratio, Organic loading rate, Co-digestion, Corn stover, Pig manure, Microbial community