Investigation on the Interactive Effects between Temperature and Chemical Composition of Organic Wastes on Anaerobic Co-Digestion Performance

Siqi Zhang; Ying Wang; Jinghui Song; Chenjing Sheng; Zezhou Shang; Rui Wang; Xiaojiao Wang; Gaihe Yang; Yongzhong Feng; Guangxin Ren

LAPSE

Living Archive for Process Systems Engineering

LAPSE:2023.5248

Published Article

LAPSE:2023.5248

Investigation on the Interactive Effects between Temperature and Chemical Composition of Organic Wastes on Anaerobic Co-Digestion Performance

Siqi Zhang, Ying Wang, Jinghui Song, Chenjing Sheng, Zezhou Shang, Rui Wang, Xiaojiao Wang, Gaihe Yang, Yongzhong Feng, Guangxin Ren

February 23, 2023

Synergistic effects among different chemical components under the anaerobic co-digestion (AcoD) process played an important role in improving its performance, which might be affected by the digesting temperature. The results showed that the actual methane production (AMP) and gasification rate (GR) of 50% lipid content were the highest, and the carbohydrate and protein content should be adjusted according to the temperature. Under mesophilic conditions, the M1 reactor with high protein content (carbohydrate−lipid−protein ratio, CLP = 20:50:30) had the highest AMP of 552.02 mL/g VS and GR of 74.72%. However, as the temperature increased, the high protein content produced high levels of ammonia nitrogen (AN) and free ammonia (FA), which formed a certain degree of ammonia inhibition, resulting in lower AMP and GR. Under thermophilic conditions, the low protein T2 reactor (CLP = 40:50:10) had the highest AMP and GR at 485.45 mL/g VS and 67.18%. In addition, the M1 and T2 reactors had the highest microbial diversity, which promoted substrate degradation and methane production. In the M1 reactor, acetoclastic metabolism is the main methanogenic pathway, while in the T2 reactor changes to hydrogenotrophic metabolism. Therefore, understanding the synergistic effect between temperature and chemical compositions was an effective way to improve the AcoD effect.

Record ID

LAPSE:2023.5248

Keywords

anaerobic co-digestion, composition, methane production, microbial community, temperature

Subject

Biosystems

Suggested Citation

Zhang S, Wang Y, Song J, Sheng C, Shang Z, Wang R, Wang X, Yang G, Feng Y, Ren G. Investigation on the Interactive Effects between Temperature and Chemical Composition of Organic Wastes on Anaerobic Co-Digestion Performance. (2023). LAPSE:2023.5248

Author Affiliations

Zhang S: College of Agronomy, Northwest A&F University, Yangling 712100, China; Shaanxi Engineering Research Center of Circular Agriculture, Yangling 712100, China
Wang Y: College of Agronomy, Northwest A&F University, Yangling 712100, China; Shaanxi Engineering Research Center of Circular Agriculture, Yangling 712100, China
Song J: College of Agronomy, Northwest A&F University, Yangling 712100, China; Shaanxi Engineering Research Center of Circular Agriculture, Yangling 712100, China
Sheng C: College of Agronomy, Northwest A&F University, Yangling 712100, China; Shaanxi Engineering Research Center of Circular Agriculture, Yangling 712100, China
Shang Z: College of Agronomy, Northwest A&F University, Yangling 712100, China; Shaanxi Engineering Research Center of Circular Agriculture, Yangling 712100, China
Wang R: College of Agronomy, Northwest A&F University, Yangling 712100, China; Shaanxi Engineering Research Center of Circular Agriculture, Yangling 712100, China
Wang X: College of Agronomy, Northwest A&F University, Yangling 712100, China; Shaanxi Engineering Research Center of Circular Agriculture, Yangling 712100, China
Yang G: College of Agronomy, Northwest A&F University, Yangling 712100, China; Shaanxi Engineering Research Center of Circular Agriculture, Yangling 712100, China
Feng Y: College of Agronomy, Northwest A&F University, Yangling 712100, China; Shaanxi Engineering Research Center of Circular Agriculture, Yangling 712100, China
Ren G: College of Agronomy, Northwest A&F University, Yangling 712100, China; Shaanxi Engineering Research Center of Circular Agriculture, Yangling 712100, China [ORCID]

Journal Name

Processes

Volume

9

Issue

9

First Page

1682

Year

2021

Publication Date

2021-09-20