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Carneiro RB, Gomes GM, Camargo FP, Zaiat M, Santos-Neto ÁJ. Anaerobic co-metabolic biodegradation of pharmaceuticals and personal care products driven by glycerol fermentation. CHEMOSPHERE 2024; 357:142006. [PMID: 38621493 DOI: 10.1016/j.chemosphere.2024.142006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2023] [Revised: 04/08/2024] [Accepted: 04/10/2024] [Indexed: 04/17/2024]
Abstract
Anaerobic digestion in two sequential phases, acidogenesis and methanogenesis, has been shown to be beneficial for enhancing the biomethane generation from wastewater. In this work, the application of glycerol (GOH) as a fermentation co-substrate during the wastewater treatment was evaluated on the biodegradation of different pharmaceuticals and personal care products (PPCPs). GOH co-digestion during acidogenesis led to a significant increase in the biodegradation of acetaminophen (from 78 to 89%), ciprofloxacin (from 25 to 46%), naproxen (from 73 to 86%), diclofenac (from 36 to 48%), ibuprofen (from 65 to 88%), metoprolol (from 45 to 59%), methylparaben (from 64 to 78%) and propylparaben (from 68 to 74%). The heterotrophic co-metabolism of PPCPs driven by glycerol was confirmed by the biodegradation kinetics, in which kbio (biodegradation kinetics constant) values increased from 0.18 to 2.11 to 0.27-3.60 L g-1-VSS d-1, for the operational phases without and with GOH, respectively. The assessment of metabolic pathways in each phase revealed that the prevalence of aromatic compounds degradation, metabolism of xenobiotics by cytochrome P450, and benzoate degradation routes during acidogenesis are key factors for the enzymatic mechanisms linked to the PPCPs co-metabolism. The phase separation of anaerobic digestion was effective in the PPCPs biodegradation, and the co-fermentation of glycerol provided an increase in the generation potential of biomethane in the system (energetic potential of 5.0 and 6.3 kJ g-1-CODremoved, without and with GOH, respectively). This study showed evidence that glycerol co-fermentation can exert a synergistic effect on the PPCPs removal during anaerobic digestion mediated by heterotrophic co-metabolism.
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Affiliation(s)
- Rodrigo B Carneiro
- São Carlos Institute of Chemistry, University of São Paulo (USP), 400, Trabalhador São-Carlense Ave., São Carlos, São Paulo, 13566-590, Brazil; Department of Environmental Chemistry, Institute of Environmental Assessment and Water Research (IDAEA), Severo Ochoa Excellence Center, Spanish Council of Scientific Research (CSIC), Jordi Girona 18-26, E-08034, Barcelona, Spain.
| | - Gisele M Gomes
- São Carlos School of Engineering, University of São Paulo (USP), 1100, João Dagnone Ave., Santa Angelina, 13563-120, São Carlos, São Paulo, Brazil.
| | - Franciele P Camargo
- Bioenergy Research Institute (IPBEN), UNESP- São Paulo State University, Rio Claro, SP, 13500-230, Brazil.
| | - Marcelo Zaiat
- São Carlos School of Engineering, University of São Paulo (USP), 1100, João Dagnone Ave., Santa Angelina, 13563-120, São Carlos, São Paulo, Brazil.
| | - Álvaro J Santos-Neto
- São Carlos Institute of Chemistry, University of São Paulo (USP), 400, Trabalhador São-Carlense Ave., São Carlos, São Paulo, 13566-590, Brazil.
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2
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Teixeira RM, Sakamoto IK, Motteran F, Camargo FP, Varesche MBA. Removal of nonylphenol ethoxylate surfactant in batch reactors: emphasis on methanogenic potential and microbial community characterization under optimized conditions. ENVIRONMENTAL TECHNOLOGY 2024; 45:1343-1357. [PMID: 36352347 DOI: 10.1080/09593330.2022.2143287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Accepted: 10/27/2022] [Indexed: 06/16/2023]
Abstract
ABSTRACTNonylphenol ethoxylate (NPE) is an endocrine-disrupting chemical that has bioaccumulative, persistent and toxic characteristics in different environmental matrices and is difficult to remove in sewage treatment plants. In this study, the effects of the initial concentration of NPE (0.2 ± 0.03 - 3.0 ± 0.02 mg. L-1) and ethanol (73.9 ± 5.0-218.6 ± 10.6 mg. L-1) were investigated using factorial design. Assays were carried out in anaerobic batch reactors, using the Zinder basal medium, yeast extract (200 mg. L-1), vitamin solution and sodium bicarbonate (10% v/v). The optimal conditions were 218.56 mg.L-1 of ethanol and 1596.51 µg.L-1 of NPE, with 92% and 88% of NPE and organic matter removal, respectively, and methane yield (1689.8 ± 59.6 mmol) after 450 h of operation. In this condition, bacteria potentially involved in the degradation of this surfactant were identified in greater relative abundance, such as Acetoanaerobium (1.68%), Smithella (1.52%), Aminivibrio (0.91%), Petrimonas (0.57%) and Enterobacter (0.47%), as well as archaea Methanobacterium and Methanoregula, mainly involved in hydrogenotrophic pathway.
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Affiliation(s)
- Rômulo Mota Teixeira
- Department of Hydraulic Engineering and Sanitation, São Carlos School of Engineering (EESC), University of São Paulo (USP), São Paulo, Brazil
| | - Isabel Kimiko Sakamoto
- Department of Hydraulic Engineering and Sanitation, São Carlos School of Engineering (EESC), University of São Paulo (USP), São Paulo, Brazil
| | - Fabrício Motteran
- Department of Civil and Environmental Engineering, Federal University of Pernambuco, Recife, Brazil
| | - Franciele Pereira Camargo
- Department of Hydraulic Engineering and Sanitation, São Carlos School of Engineering (EESC), University of São Paulo (USP), São Paulo, Brazil
| | - Maria Bernadete Amâncio Varesche
- Department of Hydraulic Engineering and Sanitation, São Carlos School of Engineering (EESC), University of São Paulo (USP), São Paulo, Brazil
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Dong CD, Cheng JW, Chen CW, Huang CP, Hung CM. Activation of calcium peroxide by nitrogen and sulfur co-doped metal-free lignin biochar for enhancing the removal of emerging organic contaminants from waste activated sludge. BIORESOURCE TECHNOLOGY 2023; 374:128768. [PMID: 36828219 DOI: 10.1016/j.biortech.2023.128768] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Revised: 02/14/2023] [Accepted: 02/18/2023] [Indexed: 06/18/2023]
Abstract
The accumulation of emerging organic contaminants (EOCs) in waste activated sludge (WAS) is a global concern. In this study, a multi-heteroatom nitrogen and sulfur was successfully embedded into lignin-based biochar (N-S-LGBC) and used it to activate calcium peroxide (CP) for the degradation of 4-nonylphenol (4-NP) in WAS. N-S-LGBC/CP was effective in degrading 85 % of 4-NP within 12 h through the activation of CP owing to hydroxyl radicals and singlet oxygen species generated from the synergism among pyrrolic-N, thiophenic-S, and lattice oxygen, i.e., active sites responsible for 4-NP degradation. These results highlight substrate biodegradability for subsequent bioprocesses that improves WAS treatment in EOC degradation by the N-S-LGBC/CP-mediated process. There was abundance of distinct Aggregatilinea genus within the phylum Chloroflexi during N-S-LGBC/CP treatment, indicating high 4-NP pretreatment efficiency in WAS. This work provides a new understanding of N-S-co-doped carbocatalysts in green and sustainable hydroxyl radical-driven carbon advanced oxidation (HR-CAOP) platforms for WAS remediation.
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Affiliation(s)
- Cheng-Di Dong
- Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung City, Taiwan; Institute of Aquatic Science and Technology, College of Hydrosphere Science, National Kaohsiung University of Science and Technology, Kaohsiung City, Taiwan
| | - Jia-Wei Cheng
- Institute of Aquatic Science and Technology, College of Hydrosphere Science, National Kaohsiung University of Science and Technology, Kaohsiung City, Taiwan
| | - Chiu-Wen Chen
- Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung City, Taiwan; Institute of Aquatic Science and Technology, College of Hydrosphere Science, National Kaohsiung University of Science and Technology, Kaohsiung City, Taiwan
| | - Chin-Pao Huang
- Department of Civil and Environmental Engineering, University of Delaware, Newark, USA
| | - Chang-Mao Hung
- Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung City, Taiwan; Institute of Aquatic Science and Technology, College of Hydrosphere Science, National Kaohsiung University of Science and Technology, Kaohsiung City, Taiwan.
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Villarreal-Reyes C, Díaz de León-Martínez L, Flores-Ramírez R, González-Lara F, Villarreal-Lucio S, Vargas-Berrones KX. Ecotoxicological impacts caused by high demand surfactants in Latin America and a technological and innovative perspective for their substitution. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 816:151661. [PMID: 34780823 DOI: 10.1016/j.scitotenv.2021.151661] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 10/29/2021] [Accepted: 11/09/2021] [Indexed: 06/13/2023]
Abstract
Nowadays, water pollution represents a great concern due to population growth, industrialization, and urbanization. Every day hazardous chemical products for humans and aquatic organisms are disposed of arbitrarily from homes and industries. Even though detergents are considered an essential market, there is evidence of environmental impacts caused by surfactants like nonylphenol ethoxylate (NPE) and linear alkylbenzene sulfonates (LAS). Regulations about maximum allowable concentrations in sewage, surface water, and drinking water are scarce or null, mostly in developing countries like Latin American countries. Therefore, this review explores these two common toxic surfactants (NPE and LAS) and proposes a technological, innovative, and ecological perspective on detergents. Also, it establishes a starting point for industries to minimize adverse effects on humans and environmental health caused by these compounds.
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Affiliation(s)
- Cecilia Villarreal-Reyes
- Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí. Av. Manuel Nava No. 6, C.P. 78260, San Luis Potosí, Mexico
| | - Lorena Díaz de León-Martínez
- Centro de Investigación Aplicada en Ambiente y Salud (CIAAS), Avenida Sierra Leona No. 550, Colonia Lomas Segunda Sección, CP 78210, San Luis Potosí, Mexico
| | - Rogelio Flores-Ramírez
- Centro de Investigación Aplicada en Ambiente y Salud (CIAAS), Avenida Sierra Leona No. 550, Colonia Lomas Segunda Sección, CP 78210, San Luis Potosí, Mexico
| | - Fabiola González-Lara
- Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí. Av. Manuel Nava No. 6, C.P. 78260, San Luis Potosí, Mexico
| | - Samantha Villarreal-Lucio
- Centro de Investigación Aplicada en Ambiente y Salud (CIAAS), Avenida Sierra Leona No. 550, Colonia Lomas Segunda Sección, CP 78210, San Luis Potosí, Mexico
| | - Karla Ximena Vargas-Berrones
- Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí. Av. Manuel Nava No. 6, C.P. 78260, San Luis Potosí, Mexico.
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Limmun W, Ishikawa N, Momotori J, Terasaki M, Sato T, Kikuchi K, Sasamoto M, Umita T, Ito A. Degradation of the endocrine-disrupting 4-nonylphenol by ferrate(VI): biodegradability and toxicity evaluation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:18882-18890. [PMID: 34705206 DOI: 10.1007/s11356-021-17167-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Accepted: 10/19/2021] [Indexed: 06/13/2023]
Abstract
4-Nonylphenol (4-NP) is an endocrine-disrupting and persistent chemical and is partially degraded in conventional wastewater treatment processes. Ferrate(VI) can be used as an environment-friendly oxidizing agent to mediate 4-NP degradation. Thus, this paper evaluates the biodegradability of 4-NP and its degradation products after the addition of ferrate(VI). The biodegradability was examined using NP labeled with 14C as a tracer and activated sludge microorganisms as an inoculum. The addition of ferrate(VI) to the 4-NP solution spiked with the tracer resulted in no remarkable decrease in the concentration of 14C, indicating incomplete mineralization of 4-NP and formation of degradation products. The degradation products from 4-NP with Fe(VI) were estimated based on mass spectra, which detected a unique peak at m/z 223 at low intensity. Four hydrogen atoms might have been added to 4-NP by degradation with Fe(VI). In addition, the effect of ferrate(VI) concentration on the estrogenic activity of 4-NP in an aqueous solution was investigated using a yeast bioassay. The results show that estrogenic activity was significantly decreased at a mass ratio of Fe(VI) to 4-NP greater than or equal to 2.5.
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Affiliation(s)
- Warunee Limmun
- Department of Frontier Matters and Function Engineering, Graduate School of Engineering, Iwate University, Ueda 4-3-5, Morioka, 020-8551, Japan
- Department of Engineering, King Mongkut's Institute of Technology Ladkrabang, Prince of Chumphon Campus, 17/1, Chumko, Pathio, Chumphon, 86160, Thailand
| | - Nao Ishikawa
- Course of Civil and Environmental Engineering, Department of System Innovation Engineering, Faculty of Science and Engineering, Iwate University, Ueda 4-3-5, Morioka, 020-8551, Japan
| | - Jin Momotori
- Division of Regional Development and Creativity, Graduate School of Arts and Sciences, Iwate University, Morioka, 020-8551, Japan
| | - Masanori Terasaki
- Department of Regional Policy, Faculty of Humanities and Social Sciences, Iwate University, Ueda 3-18-8, Morioka, 020-8550, Japan
| | - Takumu Sato
- Course of Civil and Environmental Engineering, Department of System Innovation Engineering, Faculty of Science and Engineering, Iwate University, Ueda 4-3-5, Morioka, 020-8551, Japan
| | - Kotaro Kikuchi
- Course of Civil and Environmental Engineering, Department of System Innovation Engineering, Faculty of Science and Engineering, Iwate University, Ueda 4-3-5, Morioka, 020-8551, Japan
| | - Makoto Sasamoto
- Technical Office, Faculty of Science and Engineering, Iwate University, Ueda 4-3-5, Morioka, 020-8551, Japan
| | - Teruyuki Umita
- Course of Civil and Environmental Engineering, Department of System Innovation Engineering, Faculty of Science and Engineering, Iwate University, Ueda 4-3-5, Morioka, 020-8551, Japan
| | - Ayumi Ito
- Course of Civil and Environmental Engineering, Department of System Innovation Engineering, Faculty of Science and Engineering, Iwate University, Ueda 4-3-5, Morioka, 020-8551, Japan.
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Chen Y, Zhang Y, Zhang Z. Occurrence, effects, and biodegradation of plastic additives in sludge anaerobic digestion: A review. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 287:117568. [PMID: 34153611 DOI: 10.1016/j.envpol.2021.117568] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 05/15/2021] [Accepted: 06/06/2021] [Indexed: 06/13/2023]
Abstract
The retention of microplastics, a complex blend of polymers and plastic additives (PAs), in municipal sludge has been reported. The inevitable release of PAs from microplastics might affect the subsequent biological disposal of sludge, and their final fate are of great public concern. Therefore, this review describes the current knowledge in the occurrence of PAs in sludge and significant advances in their effects on sludge anaerobic digestion (AD) and their biodegradation performance. Specifically, the compositions and contents of plasticizers, stabilizers, and flame retardants in sludge worldwide are systematically summarized. The discrepant impacts of PAs on hydrolysis, acidification, and methanogenesis processes are analyzed and compared, with corresponding trends deduced. Furthermore, the biodegradation performances of PAs during sludge AD are also discussed. For most of the PAs detected in sludge, available data for their fate and effects on AD is yet limited. Moreover, the potential role of AD microbes in the release of PAs from microplastics was still unknown. Especially, the potential effects of PAs released from biodegradable microplastics on sludge AD and their fate should be of concern. The obtained knowledge would update our understanding of the risk assessment and control of PAs in sludge AD. Recommendations for future investigation are made.
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Affiliation(s)
- Yinguang Chen
- College of Resources and Environment Science, Key Laboratory of Oasis Ecology, Ministry of Education, Xinjiang University, Urumqi, 830046, China; State Key Laboratory of Pollution Control and Resources Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, China
| | - Yu Zhang
- State Key Laboratory of Pollution Control and Resources Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, China
| | - Zhengzhe Zhang
- State Key Laboratory of Pollution Control and Resources Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, China.
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7
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Bereketoglu C, Nacar G, Sari T, Mertoglu B, Pradhan A. Transcriptomic analysis of nonylphenol effect on Saccharomyces cerevisiae. PeerJ 2021; 9:e10794. [PMID: 33614281 PMCID: PMC7882136 DOI: 10.7717/peerj.10794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Accepted: 12/28/2020] [Indexed: 11/29/2022] Open
Abstract
Nonylphenol (NP) is a bioaccumulative environmental estrogen that is widely used as a nonionic surfactant. We have previously examined short-term effects of NP on yeast cells using microarray technology. In the present study, we investigated the adaptive response of Saccharomyces cerevisiae BY4742 cells to NP exposure by analyzing genome-wide transcriptional profiles using RNA-sequencing. We used 2 mg/L NP concentration for 40 days of exposure. Gene expression analysis showed that a total of 948 genes were differentially expressed. Of these, 834 genes were downregulated, while 114 genes were significantly upregulated. GO enrichment analysis revealed that 369 GO terms were significantly affected by NP exposure. Further analysis showed that many of the differentially expressed genes were associated with oxidative phosphorylation, iron and copper acquisition, autophagy, pleiotropic drug resistance and cell cycle progression related processes such as DNA and mismatch repair, chromosome segregation, spindle checkpoint activity, and kinetochore organization. Overall, these results provide considerable information and a comprehensive understanding of the adaptive response to NP exposure at the gene expression level.
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Affiliation(s)
- Ceyhun Bereketoglu
- Department of Biomedical Engineering, Faculty of Engineering and Natural Sciences, Iskenderun Technical University, Hatay, Turkey
| | - Gozde Nacar
- Department of Bioengineering, Faculty of Engineering, Marmara University, Istanbul, Turkey
| | - Tugba Sari
- Department of Bioengineering, Faculty of Engineering, Marmara University, Istanbul, Turkey
| | - Bulent Mertoglu
- Department of Bioengineering, Faculty of Engineering, Marmara University, Istanbul, Turkey
| | - Ajay Pradhan
- Biology, The Life Science Center, School of Science and Technology, Örebro University, Örebro, Sweden
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8
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Carneiro RB, Gonzalez-Gil L, Londoño YA, Zaiat M, Carballa M, Lema JM. Acidogenesis is a key step in the anaerobic biotransformation of organic micropollutants. JOURNAL OF HAZARDOUS MATERIALS 2020; 389:121888. [PMID: 31879099 DOI: 10.1016/j.jhazmat.2019.121888] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 11/25/2019] [Accepted: 12/10/2019] [Indexed: 06/10/2023]
Abstract
Understanding the role of the different anaerobic digestion stages on the removal of organic micropollutants (OMPs) is essential to mitigate their release from wastewater treatment plants. This study assessed the fate of 21 OMPs during hydrolysis and acidogenesis to elucidate the contribution of these stages to the overall anaerobic removal. Moreover, the removal mechanisms and factors influencing them were investigated. To this purpose, a fermentation reactor was operated and fed with two different substrates: starch (to jointly evaluate hydrolysis and acidogenesis) and glucose (to isolate acidogenesis). Results indicate that sulfamethoxazole was highly biotransformed (>80 %), while galaxolide, celestolide, tonalide, erythromycin, roxithromycin, trimethoprim, octylphenol and nonylphenol achieved a 50-80 % biotransformation. Since no significant differences in the biotransformation efficiencies were found between starch and glucose fermentation, it is stated that the enzymatic activities involved in starch hydrolysis do not significantly contribute to the cometabolic biotransformation of OMPs, while acidogenesis appears as the major player. Moreover, a higher biotransformation (≥15 percentage points and p ≤ 0.05) was found for galaxolide, celestolide, tonalide, erythromycin and roxithromycin during acidogenesis in comparison with the efficiencies reported for the acetogenic/methanogenic step. The biotransformation of some OMPs was explained considering their chemical structure and the enzymatic activities.
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Affiliation(s)
- Rodrigo B Carneiro
- Department of Chemical Engineering, School of Engineering, Universidade de Santiago de Compostela, Rúa Lope Gómez de Marzoa, E-15782 Santiago de Compostela, Spain; Biological Processes Laboratory (LPB), Department of Hydraulics and Sanitation, São Carlos School of Engineering, University of São Paulo, 1100, João Dagnone Ave., Santa Angelina, 13563-120, São Carlos, São Paulo, Brazil.
| | - Lorena Gonzalez-Gil
- Department of Chemical Engineering, School of Engineering, Universidade de Santiago de Compostela, Rúa Lope Gómez de Marzoa, E-15782 Santiago de Compostela, Spain.
| | - Yudy Andrea Londoño
- GDCON Research Group, Faculty of Engineering, University Research Headquarters (SIU), University of Antioquia, Street 70 # 52-21, Medellín, Colombia.
| | - Marcelo Zaiat
- Biological Processes Laboratory (LPB), Department of Hydraulics and Sanitation, São Carlos School of Engineering, University of São Paulo, 1100, João Dagnone Ave., Santa Angelina, 13563-120, São Carlos, São Paulo, Brazil.
| | - Marta Carballa
- Department of Chemical Engineering, School of Engineering, Universidade de Santiago de Compostela, Rúa Lope Gómez de Marzoa, E-15782 Santiago de Compostela, Spain.
| | - Juan M Lema
- Department of Chemical Engineering, School of Engineering, Universidade de Santiago de Compostela, Rúa Lope Gómez de Marzoa, E-15782 Santiago de Compostela, Spain.
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Duan X, Chen Y, Yan Y, Feng L, Chen Y, Zhou Q. New method for algae comprehensive utilization: Algae-derived biochar enhances algae anaerobic fermentation for short-chain fatty acids production. BIORESOURCE TECHNOLOGY 2019; 289:121637. [PMID: 31207411 DOI: 10.1016/j.biortech.2019.121637] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Revised: 06/08/2019] [Accepted: 06/10/2019] [Indexed: 06/09/2023]
Abstract
Interest in the resource utilization of algae has gradually increased due to the frequent occurrence of harmful algal blooms. Here, biochar derived from algae was applied to algae anaerobic fermentation for short-chain fatty acids (SCFAs) production. In the presence of algae-derived biochar, the concentration of SCFAs within 4 d (4334 mg COD/L) was approximately doubled compared to the control (2016 mg COD/L), and the fermentation time for maximal SCFAs yield was shortened. Biochar improved the disruption of algae to release more intracellular macromolecular organics. Altering algae hydrolysis, the activity of hydrolase and the contents of functional gene were advantageous to SCFAs accumulation by providing more micromolecular organics in the presence of biochar. Additionally, the relative abundance and survival of acid-forming bacteria were enhanced significantly. Furthermore, biochar accelerated the electron transport and energy synthesis in the biological system, driving the biological reactions that allow microorganisms to function and life to flourish.
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Affiliation(s)
- Xu Duan
- State Key Laboratory of Pollution Control and Resources Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China
| | - Yunzhi Chen
- Maanshan Municipal Ecological Environment Bureau, 360 Yingcui Road, Maanshan, Anhui Province 243000, China
| | - Yuanyuan Yan
- College of Chemistry and Environment Engineering, Yancheng Teachers University, Yancheng, Jiangsu Province 224002, China
| | - Leiyu Feng
- State Key Laboratory of Pollution Control and Resources Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China.
| | - Yinguang Chen
- State Key Laboratory of Pollution Control and Resources Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China
| | - Qi Zhou
- State Key Laboratory of Pollution Control and Resources Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China
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Wu Y, Song K, Sun X, Ngo H, Guo W, Nghiem LD, Wang Q. Mechanisms of free nitrous acid and freezing co-pretreatment enhancing short-chain fatty acids production from waste activated sludge anaerobic fermentation. CHEMOSPHERE 2019; 230:536-543. [PMID: 31125882 DOI: 10.1016/j.chemosphere.2019.05.107] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Revised: 05/01/2019] [Accepted: 05/14/2019] [Indexed: 06/09/2023]
Abstract
Free nitrous acid (FNA) or freezing has been recently utilized as an efficient pretreatment method to increase short-chain fatty acids (SCFAs) yield from waste activated sludge (WAS) anaerobic fermentation (AF). But until now, the performances and mechanisms of the co-pretreatment for SCFAs production are unknown. This research aimed to investigate the AF mechanisms through studying its influence on sludge solubilization and related bioprocesses. WAS was pretreated for 48 h with FNA (1.07 mg N/L), freezing (-5 °C) and combination of FNA and freezing (0.53-2.13 mg N/L FNA at -5 °C), respectively, then conducted batch AF. Experimental results indicated that the optimal total SCFAs yield of 391.19 ± 5.54 mg COD/g VSS was achieved after 1.07 mg N/L FNA + freezing pretreatment at 9 days of AF, which was 2.2, 1.6 and 1.3-fold of the blank, freezing and FNA pretreated samples, respectively. The mechanisms analysis showed that co-pretreatment showed synergetic effects on sludge disintegration and solubilization, which could release more soluble substrates for SCFAs production. The co-pretreatment resulted in slight inhibition to hydrolysis and negligible inhibition to acidogenesis but severe inhibition to methanogenesis, maybe due to less endurance of methanogens.
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Affiliation(s)
- Yuqi Wu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, PR China
| | - Kang Song
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, PR China.
| | - Xiaoyan Sun
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, PR China
| | - HuuHao Ngo
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Ultimo, NSW, 2007, Australia
| | - Wenshan Guo
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Ultimo, NSW, 2007, Australia
| | - Long D Nghiem
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Ultimo, NSW, 2007, Australia
| | - Qilin Wang
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Ultimo, NSW, 2007, Australia
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