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Liu T, Zuo J, Shen Z, Zhou Y. Inhibition of biological acidification and mechanism of crotonaldehyde removal with glucose cometabolism. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 303:114090. [PMID: 34810021 DOI: 10.1016/j.jenvman.2021.114090] [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: 07/28/2021] [Revised: 11/06/2021] [Accepted: 11/08/2021] [Indexed: 06/13/2023]
Abstract
Biological acidification is an effective method in the treatment or pretreatment of industrial wastewater. Crotonaldehyde is a typical characteristic organic pollutant in petrochemical wastewater, but its effect on biological acidification is unclear. To investigate the inhibitory characteristic of crotonaldehyde on biological acidification and the mechanism of crotonaldehyde removal, variations in volatile fatty acid (VFA) yields, enzyme activities, biodegradation products, and microbial community structures were investigated by batch experiments in the presence of crotonaldehyde. The results showed that crotonaldehyde caused a 50% effect concentration (EC50) on the specific acidogenic activity (SAA) of 204.17 mg/L before 24 h, and then, the inhibitory effect was removed after 48 h as the dosage of crotonaldehyde was less than 1000 mg/L. Accordingly, crotonaldehyde was completely reduced to crotonyl alcohol by nicotinamide adenine dinucleotide (NADH) or oxidized to (E)-crotonic acid by aldehyde dehydrogenase (DHO) after 48 h. Next, 1-buanol and n-butyric acid were further metabolites, while the n-hexanoic acid detected with high-concentration crotonaldehyde might be due to the ORB pathway with 1-buanol as an electron donor. The dominant bacterial communities were Clostridium_sensu_stricto_1, Clostridium_sensu_stricto_11, Clostridium_sensu_stricto_12, which were related to the biodegradation process of crotonaldehyde. The findings of this research could provide a theoretical underpinning for developing the biological technologies to pretreat crotonaldehyde wastewater.
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Affiliation(s)
- Tao Liu
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, PR China; Research Center of Environmental Pollution Control Engineering Technology, Chinese Research Academy of Environmental Sciences, Beijing, 100012, PR China; School of Environment, Tsinghua University, Beijing, 100084, PR China
| | - Jiane Zuo
- School of Environment, Tsinghua University, Beijing, 100084, PR China
| | - Zhiqiang Shen
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, PR China; Research Center of Environmental Pollution Control Engineering Technology, Chinese Research Academy of Environmental Sciences, Beijing, 100012, PR China.
| | - Yuexi Zhou
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, PR China; Research Center of Environmental Pollution Control Engineering Technology, Chinese Research Academy of Environmental Sciences, Beijing, 100012, PR China.
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Bongartz P, Bator I, Baitalow K, Keller R, Tiso T, Blank LM, Wessling M. A scalable bubble-free membrane aerator for biosurfactant production. Biotechnol Bioeng 2021; 118:3545-3558. [PMID: 34002856 DOI: 10.1002/bit.27822] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Accepted: 05/13/2021] [Indexed: 11/08/2022]
Abstract
The bioeconomy is a paramount pillar in the mitigation of greenhouse gas emissions and climate change. Still, the industrialization of bioprocesses is limited by economical and technical obstacles. The synthesis of biosurfactants as advanced substitutes for crude-oil-based surfactants is often restrained by excessive foaming. We present the synergistic combination of simulations and experiments towards a reactor design of a submerged membrane module for the efficient bubble-free aeration of bioreactors. A digital twin of the combined bioreactor and membrane aeration module was created and the membrane arrangement was optimized in computational fluid dynamics studies with respect to fluid mixing. The optimized design was prototyped and tested in whole-cell biocatalysis to produce rhamnolipid biosurfactants from sugars. Without any foam formation, the new design enables a considerable higher space-time yield compared to previous studies with membrane modules. The design approach of this study is of generic nature beyond rhamnolipid production.
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Affiliation(s)
- Patrick Bongartz
- Chemical Process Engineering (AVT.CVT), RWTH Aachen University, Aachen, Germany.,Bioeconomy Science Center (BioSC), Forschungszentrum Jülich, Jülich, Germany
| | - Isabel Bator
- Bioeconomy Science Center (BioSC), Forschungszentrum Jülich, Jülich, Germany.,Institute of Applied Microbiology, Aachen Biology and Biotechnology, RWTH Aachen University, Aachen, Germany
| | - Kristina Baitalow
- Chemical Process Engineering (AVT.CVT), RWTH Aachen University, Aachen, Germany
| | - Robert Keller
- Chemical Process Engineering (AVT.CVT), RWTH Aachen University, Aachen, Germany
| | - Till Tiso
- Institute of Applied Microbiology, Aachen Biology and Biotechnology, RWTH Aachen University, Aachen, Germany
| | - Lars Mathias Blank
- Institute of Applied Microbiology, Aachen Biology and Biotechnology, RWTH Aachen University, Aachen, Germany
| | - Matthias Wessling
- Chemical Process Engineering (AVT.CVT), RWTH Aachen University, Aachen, Germany.,DWI Leibniz - Institute for Interactive Materials, Aachen, Germany
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Akob DM, Sutton JM, Fierst JL, Haase KB, Baesman S, Luther GW, Miller LG, Oremland RS. Acetylenotrophy: a hidden but ubiquitous microbial metabolism? FEMS Microbiol Ecol 2018; 94:5026170. [PMID: 29933435 PMCID: PMC7190893 DOI: 10.1093/femsec/fiy103] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Accepted: 05/29/2018] [Indexed: 11/12/2022] Open
Abstract
Acetylene (IUPAC name: ethyne) is a colorless, gaseous hydrocarbon, composed of two triple bonded carbon atoms attached to hydrogens (C2H2). When microbiologists and biogeochemists think of acetylene, they immediately think of its use as an inhibitory compound of certain microbial processes and a tracer for nitrogen fixation. However, what is less widely known is that anaerobic and aerobic microorganisms can degrade acetylene, using it as a sole carbon and energy source and providing the basis of a microbial food web. Here, we review what is known about acetylene degrading organisms and introduce the term 'acetylenotrophs' to refer to the microorganisms that carry out this metabolic pathway. In addition, we review the known environmental sources of acetylene and postulate the presence of an hidden acetylene cycle. The abundance of bacteria capable of using acetylene and other alkynes as an energy and carbon source suggests that there are energy cycles present in the environment that are driven by acetylene and alkyne production and consumption that are isolated from atmospheric exchange. Acetylenotrophs may have developed to leverage the relatively high concentrations of acetylene in the pre-Cambrian atmosphere, evolving later to survive in specialized niches where acetylene and other alkynes were produced.
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Affiliation(s)
- Denise M Akob
- U. S. Geological Survey, 12201 Sunrise Valley Dr, MS 430, Reston, VA 20192 USA
| | - John M Sutton
- Department of Biological Sciences, The University of Alabama, SEC 2328, Box 870344, Tuscaloosa, AL 35487 USA
| | - Janna L Fierst
- Department of Biological Sciences, The University of Alabama, SEC 2328, Box 870344, Tuscaloosa, AL 35487 USA
| | - Karl B Haase
- U. S. Geological Survey, 12201 Sunrise Valley Dr, MS 430, Reston, VA 20192 USA
| | - Shaun Baesman
- U. S. Geological Survey, 345 Middlefield Road, MS 480, Menlo Park, CA 94025 USA
| | - George W Luther
- School of Marine Science and Policy, University of Delaware, 700 Pilottown Road, Cannon Laboratory 218, Lewes, DE 19958, USA
| | - Laurence G Miller
- U. S. Geological Survey, 345 Middlefield Road, MS 480, Menlo Park, CA 94025 USA
| | - Ronald S Oremland
- U. S. Geological Survey, 345 Middlefield Road, MS 480, Menlo Park, CA 94025 USA
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Heerema L, Wierckx N, Roelands M, Hanemaaijer JH, Goetheer E, Verdoes D, Keurentjes J. In situ phenol removal from fed-batch fermentations of solvent tolerant Pseudomonas putida S12 by pertraction. Biochem Eng J 2011. [DOI: 10.1016/j.bej.2010.11.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Chrzanowski L, Stasiewicz M, Owsianiak M, Szulc A, Piotrowska-Cyplik A, Olejnik-Schmidt AK, Wyrwas B. Biodegradation of diesel fuel by a microbial consortium in the presence of 1-alkoxymethyl-2-methyl-5-hydroxypyridinium chloride homologues. Biodegradation 2009; 20:661-71. [PMID: 19301130 DOI: 10.1007/s10532-009-9253-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2008] [Accepted: 03/04/2009] [Indexed: 11/25/2022]
Abstract
Fast development of ionic liquids as gaining more and more attention valuable chemicals will undoubtedly lead to environmental pollution. New formulations and application of ionic liquids may result in contamination in the presence of hydrophobic compounds, such as petroleum mixtures. We hypothesize that in the presence of diesel fuel low-water-soluble ionic liquids may become more toxic to hydrocarbon-degrading microorganisms. In this study the influence of 1-alkoxymethyl-2-methyl-5-hydroxypyridinium chloride homologues (side-chain length from C(3) to C(18)) on biodegradation of diesel fuel by a bacterial consortium was investigated. Whereas test performed for the consortium cultivated on disodium succinate showed that toxicity of the investigated ionic liquids decreased with increase in side-chain length, only higher homologues (C(8)-C(18)) caused a decrease in diesel fuel biodegradation. As a result of exposure to toxic compounds also modification in cell surface hydrophobicity was observed (MATH). Disulphine blue active substances method was employed to determine partitioning index of ionic liquids between water and diesel fuel phase, which varied from 1.1 to 51% for C(3) and C(18) homologues, respectively. We conclude that in the presence of hydrocarbons acting as a solvent, the increased bioavailability of hydrophobic homologues is responsible for the decrease in biodegradation efficiency of diesel fuel.
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Affiliation(s)
- Lukasz Chrzanowski
- Institute of Chemical Technology and Engineering, Poznan University of Technology, Pl. M. Skłodowskiej-Curie 2, 60-965, Poznań, Poland.
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Hermans J, Martin C, Huijberts GN, Goosen T, de Bont JA. Transformation of Mycobacterium aurum and Mycobacterium smegmatis with the broad host-range gram-negative cosmid vector pJRD215. Mol Microbiol 1991; 5:1561-6. [PMID: 1787803 DOI: 10.1111/j.1365-2958.1991.tb00803.x] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The transformation of Mycobacterium aurum and Mycobacterium smegmatis with the Gram-negative RSF1010-derived cosmid pJRD215 is described. The plasmid is stably maintained in both species and the antibiotic resistance determinants for kanamycin and streptomycin are expressed. Southern blot analysis shows that rearrangements take place both in M. aurum and in M. smegmatis. The use of pJRD215 in mycobacterial cloning systems is discussed.
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Affiliation(s)
- J Hermans
- Department of Food Science, Agricultural University, Wageningen, The Netherlands
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