Abstract
The objectives of this study were to evaluate the potential of using thermophilic aerobic digestion (TAD) to hydrolyze aquaculture sludge, and to investigate the hydrolysis efficiency and changes in microbial community structure during TAD at 0, 15, and 30 practical salinity units (psu). As digestion progressed, soluble organic matter concentrations in all reactors increased to their maximum values at 6 h. The hydrolysis efficiency at 6 h decreased as salinity increased: 2.42% at 0 psu, 1.78% at 15 psu, and 1.04% at 30 psu. The microbial community compositions at the genus level prominently differed in the relative abundances of dominant bacteria between 0 psu and 30 psu. The relative abundance of genera Iodidimonas and Tepidiphilus increased significantly as salinity increased. Increase in the salinity at which thermophilic aerobic digestion of aquaculture sludge was conducted altered the microbial community structure, which in turn decreased the efficiency of organic matter hydrolysis.
Document Type
Article
Publication Date
2024
Digital Object Identifier (DOI)
https://doi.org/10.3389/fmicb.2024.1488041
Funding Information
The author(s) declare that financial support was received for the research, authorship, and/or publication of this article. This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2021R1G1A1095424).
Repository Citation
Chun, Jihyun; Kim, Su Min; Ko, Gwangil; Shin, Hyo Jeong; Kim, Minjae; and Cho, Hyun Uk, "Thermophilic aerobic digestion using aquaculture sludge from rainbow trout aquaculture facilities: effect of salinity" (2024). UK CARES Faculty Publications. 33.
https://uknowledge.uky.edu/ukcares_facpub/33
Notes/Citation Information
© 2024 Chun, Kim, Ko, Shin, Kim and Cho. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.