1
|
Merino F, Mendoza S, Carhuapoma-Garay J, Campoverde-Vigo L, Huamancondor-Paz YP, Choque-Quispe Y, Buleje Campos D, Choque-Quispe D, Rodriguez-Cardenas L, Saldaña-Rojas GB, Loayza-Aguilar RE, Olivos-Ramirez GE. Potential use of sludge from El Ferrol Bay (Chimbote, Peru) for the production of lipids in the culture of Scenedesmus acutus (Meyen, 1829). Sci Rep 2024; 14:6968. [PMID: 38521782 PMCID: PMC10960819 DOI: 10.1038/s41598-024-52919-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Accepted: 01/25/2024] [Indexed: 03/25/2024] Open
Abstract
Despite the extensive development of microalgae biotechnology, it still requires new methodologies to lower production costs, especially in the field of biofuel production. Therefore, innovative methods that facilitate operations and enable cost-effective production are important in driving this industry. In this study, we propose a new low-cost and easy-to-use procedure, addressed to the generation of a culture medium for Scenedesmus acutus. The medium was obtained by thermal reduction of a sludge sample from El Ferrol Bay (Chimbote, Peru), whereby we obtained an aqueous medium. Our results indicated that the aqueous medium incorporates all necessary nutrients for microalgae production; allowing a maximum biomass of 0.75 ± 0.07 g/L with 60% of the medium; while high lipids production (59.42 ± 6.16%) was achieved with 20%. Besides, we quantified, in the experimental medium and at the end of the cultures, the levels of inorganic nutrients such as ammonium, nitrites, nitrates, and phosphates; in addition to COD and TOC, which were significantly reduced ( p < 0.05) after 7 days of culture, mainly in the treatment with 20%. These results suggest tremendous potential for sludge reuse, which also entails a cost reduction in microalgae biomass production, with additional positive impacts on large-scale application over highly polluted environments.
Collapse
Affiliation(s)
- Fernando Merino
- Escuela de Biología en Acuicultura, Universidad Nacional del Santa, Av. Universitaria S/N, Nuevo Chimbote, 02712, Peru
| | - Sorayda Mendoza
- Escuela de Biología en Acuicultura, Universidad Nacional del Santa, Av. Universitaria S/N, Nuevo Chimbote, 02712, Peru
| | - Juan Carhuapoma-Garay
- Escuela de Biología en Acuicultura, Universidad Nacional del Santa, Av. Universitaria S/N, Nuevo Chimbote, 02712, Peru
| | - Luis Campoverde-Vigo
- Escuela de Biología en Acuicultura, Universidad Nacional del Santa, Av. Universitaria S/N, Nuevo Chimbote, 02712, Peru
| | - Yolanda P Huamancondor-Paz
- Escuela de Biología en Acuicultura, Universidad Nacional del Santa, Av. Universitaria S/N, Nuevo Chimbote, 02712, Peru
| | - Yudith Choque-Quispe
- Environmental Engineering Department, Research group for the development of advanced materials for water and food treatment, Advanced Materials Research Laboratory for Water and Food Treatment, Universidad Nacional José María Arguedas, Andahuaylas, 03701, Peru
| | - Dianeth Buleje Campos
- Agroindustrial Engineering Department, Advanced Materials Research Laboratory for Water and Food Treatment, Universidad Nacional José María Arguedas, Andahuaylas, 03701, Peru
| | - David Choque-Quispe
- Agroindustrial Engineering Department, Research group for the development of advanced materials for water and food treatment, Advanced Materials Research Laboratory for Water and Food Treatment, Universidad Nacional José María Arguedas, Andahuaylas, 03701, Peru
| | - Liliana Rodriguez-Cardenas
- Advanced Materials Research Laboratory for Water and Food Treatment, Universidad Nacional José María Arguedas, Andahuaylas, 03701, Peru
| | - Guillermo B Saldaña-Rojas
- Escuela de Biología en Acuicultura, Universidad Nacional del Santa, Av. Universitaria S/N, Nuevo Chimbote, 02712, Peru
| | - Rómulo E Loayza-Aguilar
- Escuela de Biología en Acuicultura, Universidad Nacional del Santa, Av. Universitaria S/N, Nuevo Chimbote, 02712, Peru
| | - Gustavo E Olivos-Ramirez
- Escuela de Biología en Acuicultura, Universidad Nacional del Santa, Av. Universitaria S/N, Nuevo Chimbote, 02712, Peru.
| |
Collapse
|
2
|
Huang X, Xing Y, Wang H, Dai Z, Chen T. Nitrogen Advanced Treatment of Urban Sewage by Denitrification Deep-Bed Filter: Removal Performance and Metabolic Pathway. Front Microbiol 2022; 12:811697. [PMID: 35154036 PMCID: PMC8825488 DOI: 10.3389/fmicb.2021.811697] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Accepted: 12/10/2021] [Indexed: 11/13/2022] Open
Abstract
This study aimed to explore the performance of denitrification deep-bed filter (DN-DBF) to treat municipal sewage for meeting a more stringent discharge standard of total nitrogen (TN) (10.0 mg L-1). A lab-scale DN-DBF was conducted to optimize operation parameters and reveal the microbiological mechanism for TN removal. The results showed that more than 12.7% TN removal was obtained by adding methanol compared with sodium acetate. The effluent TN concentration reached 6.0-7.0 mg L-1 with the optimal influent carbon and nitrogen ratio (C/N) and hydraulic retention time (HRT) (3:1 and 0.25 h). For the nitrogen removal mechanism, Blastocatellaceae_Subgroup_4 and norank_o_JG30-KF-CM45 were dominant denitrification floras with an abundance of 6-10%. Though large TN was removed at the top layer of DN-DBF, microbial richness and diversity at the middle layer were higher than both ends. However, the relative abundance of nitrite reductase enzymes (EC1.7.2.1) gradually increases as the depth increases; conversely, the relative abundance of nitrous oxide reductase gradually decreased.
Collapse
Affiliation(s)
- Xiao Huang
- Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing, China
- Shenzhen Key Laboratory of Water Resource Utilization and Environmental Pollution Control, School of Civil and Environmental Engineering, Harbin Institute of Technology, Shenzhen, China
| | - Yixiao Xing
- Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing, China
| | - Hongjie Wang
- Shenzhen Key Laboratory of Water Resource Utilization and Environmental Pollution Control, School of Civil and Environmental Engineering, Harbin Institute of Technology, Shenzhen, China
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, China
| | - Zhongyi Dai
- China Municipal Engineering Central South Design and Research Institute Co., Ltd., Wuhan, China
| | - Tiantian Chen
- CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China
| |
Collapse
|