Optimizing anaerobic digestion: Benefits of mild temperature transition from thermophilic to mesophilic conditions.

ABSTRACT: Anaerobic digestion (AD) plays a significant role in renewable energy recovery. Upgrading AD from thermophilic (50-57 °C) to mesophilic (30-38 °C) conditions to enhance process stability and reduce energy input remains challenging due to the high sensitivity of thermophilic microbiomes to temperature fluctuations. Here we compare the effects of two decreasing-temperature modes from 55 to 35 °C on cell viability, microbial dynamics, and interspecies interactions. A sharp transition (ST) is a one-step transition by 20 °C d^-1, while a mild transition (MT) is a stepwise transition by 1 °C d^-1. We find a greater decrease in methane production with ST (88.8%) compared to MT (38.9%) during the transition period. ST mode overproduced reactive oxygen species by 1.6-fold, incre

SUBMITTER: Zhang X 

PROVIDER: S-EPMC11237690 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature