TY - JOUR
T1 - Application of endospore-forming Bacillus species to food waste-recycling wastewater treatment
T2 - A focus on the fate of macromolecular nutrients
AU - Seo, Kyu Won
AU - Gu, Man Bock
AU - Tsang, Yiu Fai
AU - Choi, Yong Su
AU - Chung, Jaeshik
N1 - Funding Information:
This work was supported by the Korea Environment Industry & Technology Institute (KEITI) through the Subsurface Environment Management (SEM) Project ( 2021002470004 ) funded by the Korea Ministry of Environment ( MOE ), the National Research Foundation of Korea (NRF) through the ‘Climate Change Impact Minimizing Technology’ Program, funded by the Korean Ministry of Science and ICT( MSIT ) ( 2020M3H5A1080712 ). The authors also acknowledge the support from the Future Research Program ( 2E31261 ), funded by the Korea Institute of Science and Technology (KIST).
Publisher Copyright:
© 2022 Elsevier Ltd
PY - 2022/6
Y1 - 2022/6
N2 - A novel bioprocess for treating high-strength food waste-recycling wastewater (FRW) by using endospore-forming bacteria was developed and evaluated under various hydraulic retention times (HRTs) and sequentially decreasing dissolved oxygen (DO) concentrations. Four Bacillus species (i.e., B. subtilis, B. licheniformis, B. mycoides, and B. thuringiensis) were added to the laboratory-scale system operated for 200 days and fed with an influent of 30 g·BOD/L. The dominance of endospore-forming bacteria was achieved (> 65%) by adding Bacillus species, which decomposes macromolecular nutrients such as carbohydrates, proteins, and lipids. Longer HRT in the aerobic reactor led to a higher removal rate of organic matter, whereas endospore-forming bacteria were clearly identified in the anoxic reactor; the observed removal efficiency of carbohydrates, lipids, proteins, nitrogen, and phosphorus were 99.4%, 94.0%, 87.6%, 81.3%, and 91.4%, respectively, throughout the sequential aerobic-anaerobic reactors. The results show that the proposed system using endospore-forming Bacillus bacteria could be an effective alternative for high-strength FRW treatment.
AB - A novel bioprocess for treating high-strength food waste-recycling wastewater (FRW) by using endospore-forming bacteria was developed and evaluated under various hydraulic retention times (HRTs) and sequentially decreasing dissolved oxygen (DO) concentrations. Four Bacillus species (i.e., B. subtilis, B. licheniformis, B. mycoides, and B. thuringiensis) were added to the laboratory-scale system operated for 200 days and fed with an influent of 30 g·BOD/L. The dominance of endospore-forming bacteria was achieved (> 65%) by adding Bacillus species, which decomposes macromolecular nutrients such as carbohydrates, proteins, and lipids. Longer HRT in the aerobic reactor led to a higher removal rate of organic matter, whereas endospore-forming bacteria were clearly identified in the anoxic reactor; the observed removal efficiency of carbohydrates, lipids, proteins, nitrogen, and phosphorus were 99.4%, 94.0%, 87.6%, 81.3%, and 91.4%, respectively, throughout the sequential aerobic-anaerobic reactors. The results show that the proposed system using endospore-forming Bacillus bacteria could be an effective alternative for high-strength FRW treatment.
KW - Bacillus species
KW - Endospore-forming bacteria
KW - Food waste-recycling wastewater
KW - Macromolecular nutrients
KW - Microbial community structure
UR - http://www.scopus.com/inward/record.url?scp=85127863876&partnerID=8YFLogxK
U2 - 10.1016/j.jece.2022.107584
DO - 10.1016/j.jece.2022.107584
M3 - Article
AN - SCOPUS:85127863876
SN - 2213-3437
VL - 10
JO - Journal of Environmental Chemical Engineering
JF - Journal of Environmental Chemical Engineering
IS - 3
M1 - 107584
ER -