1
|
Bei E, Ye Z, Chen X, Li X, Wang J, Qiu Y, Xie S, Chen C. Study on characteristic and mechanism involved in the formation of N-nitrosodimethylamine precursors during microbial metabolism of amino acids. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 874:162469. [PMID: 36858218 DOI: 10.1016/j.scitotenv.2023.162469] [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: 12/25/2022] [Revised: 02/02/2023] [Accepted: 02/21/2023] [Indexed: 06/18/2023]
Abstract
Amino acid metabolism by microorganisms is a new but important pathway for the formation of NDMA precursors in water. We investigated the properties of nitrosamine precursors produced through microbial metabolism of amino acids by polarity rapid assessment method and molecular weight fractionation by ultrafiltration method. The PRAM results showed that the positively charged fraction and the non-polar fraction accounted for most (45 %-79 % and 6 %-82 %, respectively) of the NDMA precursors. The MW fractionation results also indicate the dominant precursors had MWs <1 kDa or over 10 kDa. NDMA precursors produced through amino acid metabolism were identified and quantified. Dimethylamine, N-methyl-alanine and alanine methyl ester were produced during the metabolism of alanine and peptone. Together, N-methyl-alanine and dimethylamine averagely contributed 24 % (12 %-44 %) of the NDMA precursors in the alanine medium. The NDMA precursor formation pathway during alanine metabolism involves the methylation of alanine to form N-methyl-alanine and the decomposition of alanine anabolism products to form dimethylamine. Nitrosamine precursors are generally formed through anabolism or methylation, but biogenic amines or NH3 can be produced through catabolism before nitrosamine precursor synthesis. Microbial community analysis was performed and Ralstonia was found to be a likely key genus contributing to NDMA precursor formation during alanine metabolism.
Collapse
Affiliation(s)
- Er Bei
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Zhiwei Ye
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Xiuli Chen
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Science and Engineering, Peking University, Beijing 100871, China
| | - Xiao Li
- Research Institute for Environmental Innovation (Suzhou), Tsinghua, Suzhou 215163, China
| | - Jun Wang
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Yu Qiu
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Shuguang Xie
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Science and Engineering, Peking University, Beijing 100871, China.
| | - Chao Chen
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China; Research Institute for Environmental Innovation (Suzhou), Tsinghua, Suzhou 215163, China.
| |
Collapse
|
2
|
Qu C, Wu Z, Pan D, Cai Z, Liu X. Characterization of Lactobacillus reuteri WQ-Y1 with the ciprofloxacin degradation ability. Biotechnol Lett 2021; 43:855-864. [PMID: 33387114 DOI: 10.1007/s10529-020-03068-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Accepted: 12/12/2020] [Indexed: 11/27/2022]
Abstract
OBJECT As a broad-spectrum fluoroquinolone antibiotic drug, ciprofloxacin (CIP) is frequently used in the treatment of a wide variety of infections. However, the residues of this antibiotic pose a big threat to the aquatic environment and human health. In this research, Lactobacillus reuteri WQ-Y1 with CIP degradation ability was screened and identified. RESULTS L. reuteri WQ-Y1 with a degradation rate of 65.1% for 4 µg mL-1 CIP was screened from 17 lactic acid bacteria (LAB), and cytochrome P450 enzyme was confirmed to promote the degradation of CIP by L. reuteri WQ-Y1. Meanwhile, the CIP degradation rate were also higher in 48 h' culture time when co-cultured with 1 mg/mL of glucose in the culture media. Furthermore, result also proved that fluoroquinolone antibiotics with the similar piperazine ring structures could be degraded by L. reuteri WQ-Y1. CONCLUSIONS L. reuteri WQ-Y1 could degrade fluoroquinolone antibiotics with the similar piperazine ring structure. However, future work still needs to be done on the confirmation of the key enzymes in the cytochrome P450 enzymes family in the biodegradation. The isolated ciprofloxacin-degrading strain L. reuteri WQ-Y1 had a CIP degradation rate of 65.1% at 24 hours, and one biodegradation metabolite was identified and proved to be an important metabolite of CIP from cytochrome P450 enzymes family hydrolysis with UPLC-MS/MS spectrograms approach.
Collapse
Affiliation(s)
- Chunxiao Qu
- State Key Laboratory of Dairy Biotechnology, Shanghai Engineering Research Center of Dairy Biotechnology, Shagnhai, 200436, People's Republic of China
| | - Zhen Wu
- State Key Laboratory of Dairy Biotechnology, Shanghai Engineering Research Center of Dairy Biotechnology, Shagnhai, 200436, People's Republic of China.
- Key Laboratory of Animal Protein Deep Processing Technology of Zhejiang, School of Food and Pharmaceutical Sciences, Ningbo University, Ningbo, 315211, Zhejiang, People's Republic of China.
| | - Daodong Pan
- State Key Laboratory of Dairy Biotechnology, Shanghai Engineering Research Center of Dairy Biotechnology, Shagnhai, 200436, People's Republic of China.
- Key Laboratory of Animal Protein Deep Processing Technology of Zhejiang, School of Food and Pharmaceutical Sciences, Ningbo University, Ningbo, 315211, Zhejiang, People's Republic of China.
| | - Zhendong Cai
- Key Laboratory of Animal Protein Deep Processing Technology of Zhejiang, School of Food and Pharmaceutical Sciences, Ningbo University, Ningbo, 315211, Zhejiang, People's Republic of China
| | - Xiaotao Liu
- Ningbo Dairy Group, Ningbo, 315211, Zhejiang, China
| |
Collapse
|
3
|
Madeira CL, Jog KV, Vanover ET, Brooks MD, Taylor DK, Sierra-Alvarez R, Waidner LA, Spain JC, Krzmarzick MJ, Field JA. Microbial Enrichment Culture Responsible for the Complete Oxidative Biodegradation of 3-Amino-1,2,4-triazol-5-one (ATO), the Reduced Daughter Product of the Insensitive Munitions Compound 3-Nitro-1,2,4-triazol-5-one (NTO). ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:12648-12656. [PMID: 31553579 DOI: 10.1021/acs.est.9b04065] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
3-Nitro-1,2,4-triazol-5-one (NTO) is one of the main ingredients of many insensitive munitions, which are being used as replacements for conventional explosives. As its use becomes widespread, more research is needed to assess its environmental fate. Previous studies have shown that NTO is biologically reduced to 3-amino-1,2,4-triazol-5-one (ATO). However, the final degradation products of ATO are still unknown. We have studied the aerobic degradation of ATO by enrichment cultures derived from the soil. After multiple transfers, ATO degradation was monitored in closed bottles through measurements of inorganic carbon and nitrogen species. The results indicate that the members of the enrichment culture utilize ATO as the sole source of carbon and nitrogen. As ATO was mineralized to CO2, N2, and NH4+, microbial growth was observed in the culture. Co-substrates addition did not increase the ATO degradation rate. Quantitative polymerase chain reaction analysis revealed that the organisms that enriched using ATO as carbon and nitrogen source were Terrimonas spp., Ramlibacter-related spp., Mesorhizobium spp., Hydrogenophaga spp., Ralstonia spp., Pseudomonas spp., Ectothiorhodospiraceae, and Sphingopyxis. This is the first study to report the complete mineralization of ATO by soil microorganisms, expanding our understanding of natural attenuation and bioremediation of the explosive NTO.
Collapse
Affiliation(s)
- Camila L Madeira
- Department of Chemical and Environmental Engineering , University of Arizona , Tucson , Arizona 85721-0011 , United States
| | - Kalyani V Jog
- Department of Chemical and Environmental Engineering , University of Arizona , Tucson , Arizona 85721-0011 , United States
| | - Erica T Vanover
- Department of Chemical and Environmental Engineering , University of Arizona , Tucson , Arizona 85721-0011 , United States
| | - Matthew D Brooks
- School of Civil and Environmental Engineering , Oklahoma State University , Stillwater , Oklahoma 74078 , United States
| | - David K Taylor
- School of Civil and Environmental Engineering , Oklahoma State University , Stillwater , Oklahoma 74078 , United States
| | - Reyes Sierra-Alvarez
- Department of Chemical and Environmental Engineering , University of Arizona , Tucson , Arizona 85721-0011 , United States
| | - Lisa A Waidner
- Center for Environmental Diagnostics & Bioremediation , University of West Florida , Pensacola , Florida 32514 , United States
| | - Jim C Spain
- School of Civil and Environmental Engineering , Georgia Institute of Technology , Atlanta , Georgia 30332-0355 , United States
- Center for Environmental Diagnostics & Bioremediation , University of West Florida , Pensacola , Florida 32514 , United States
| | - Mark J Krzmarzick
- School of Civil and Environmental Engineering , Oklahoma State University , Stillwater , Oklahoma 74078 , United States
| | - Jim A Field
- Department of Chemical and Environmental Engineering , University of Arizona , Tucson , Arizona 85721-0011 , United States
| |
Collapse
|
4
|
Raj I, Bansiwal A, Vaidya AN. Kinetic evaluation for rapid degradation of dimethylamine enriched with Agromyces and Ochrobactrum sp. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 245:322-329. [PMID: 31158684 DOI: 10.1016/j.jenvman.2019.05.074] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 05/13/2019] [Accepted: 05/19/2019] [Indexed: 06/09/2023]
Abstract
Dimethylamine (DMA) possesses an obnoxious odor which has resulted in public concern during the past several decades. A rare bacterial species proficient to degrade DMA, designated IR-26, was isolated from Indian Oil Corporation Limited (IOCL) and identified as Agromyces and Ochrobactrum sp., which has presented a rapid degradation when compared to other bacterial species which were capable to degrade DMA. The removal efficiency of 100% has been calculated in different concentration of DMA. The kinetic study reveals the maximum reduction rate of DMA was 0.11 per hour and the maximum growth rate of biomass was 0.013 per hour respectively. The saturation constant of DMA was around 1.96 mg/L which shows a high affinity of DMA. The importance of these analyses is offered and conversed in this paper.
Collapse
Affiliation(s)
- Ishan Raj
- Environmental Biotechnology and Genomics Division, CSIR-NEERI, Nagpur, India; Academy of Scientific and Innovative Research, CSIR-NEERI, Nagpur, 440020 Maharashtra, India.
| | - Amit Bansiwal
- Environmental Material Division, CSIR-NEERI, Nagpur, India
| | - A N Vaidya
- Solid and Hazardous Waste Management Division, CSIR-NEERI, Nagpur, India
| |
Collapse
|
5
|
Na-Phatthalung W, Musikavong C, Suttinun O. Degradation of N-nitrosodimethylamine and its amine precursors by cumene-induced Rhodococcus sp. strain L4. Biodegradation 2019; 30:375-388. [DOI: 10.1007/s10532-019-09876-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Accepted: 05/06/2019] [Indexed: 10/26/2022]
|
6
|
Li S, Shu Y, Tang X, Lin P, Wang J, Zhang X, Chen C. Reaction patterns of NDMA precursors during the sequential chlorination process of short-term free chlorination and monochloramination. Sep Purif Technol 2018. [DOI: 10.1016/j.seppur.2018.04.055] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
|
7
|
Beltrán-Suito R, Pinedo-Flores A, Bravo-Hualpa F, Ramos-Muñoz J, Sun-Kou MDR. Adsorption of N,N-dimethylamine from aqueous solutions by a metal organic framework, MOF – 235. J DISPER SCI TECHNOL 2018. [DOI: 10.1080/01932691.2018.1489275] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Rodrigo Beltrán-Suito
- Department of Sciences, Section Chemistry, Pontifical Catholic University of Peru, San Miguel, Perú
- Department of Chemistry, Metalorganic Chemistry and Inorganic Materials, Technical University of Berlin, Berlin, Germany
| | - Angela Pinedo-Flores
- Department of Sciences, Section Chemistry, Pontifical Catholic University of Peru, San Miguel, Perú
| | - Fabiola Bravo-Hualpa
- Department of Sciences, Section Chemistry, Pontifical Catholic University of Peru, San Miguel, Perú
| | - Jorge Ramos-Muñoz
- Department of Sciences, Section Chemistry, Pontifical Catholic University of Peru, San Miguel, Perú
- Department of Sciences, Peruvian University of Applied Sciences, Monterrico, Santiago de Surco, Perú
| | | |
Collapse
|
8
|
Zou R, Liao X, Zhao L, Yuan B. Reduction of N-nitrosodimethylamine formation from ranitidine by ozonation preceding chloramination: influencing factors and mechanisms. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:13489-13498. [PMID: 29492817 DOI: 10.1007/s11356-018-1470-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Accepted: 02/02/2018] [Indexed: 06/08/2023]
Abstract
Formation of toxic N-nitrosodimethylamine (NDMA) by chloramination of ranitidine, a drug to block histamine, was still an ongoing issue and posed a risk to human health. In this study, the effect of ozonation prior to chloramination on NDMA formation and the transformation pathway were determined. Influencing factors, including ozone dosages, pH, hydroxyl radical scavenger, bromide, and NOM, were studied. The results demonstrated that small ozone dosage (0.5 mg/L) could effectively control NDMA formation from subsequent chloramination (from 40 to 0.8%). The NDMA molar conversion was not only influenced by pH but also by ozone dosages at various pre-ozonation pH (reached the highest value of 5% at pH 8 with 0.5 mg/L O3 but decreased with the increasing pH with 1 mg/L O3). The NDMA molar yield by chloramination of ranitidine without pre-ozonation was reduced by the presence of bromide ion due to the decomposition of disinfectant. However, due to the formation of brominated intermediate substances (i.e., dimethylamine (DMA), dimethyl-aminomethyl furfuryl alcohol (DFUR)) with higher NDMA molar yield than their parent substances, more NDMA was formed than that without bromide ion upon ozonation. Natural organic matter (NOM) and hydroxyl radical scavenger (tert-butyl alcohol, tBA) enhanced NDMA generation because of the competition of ozone and more ranitidine left. The NDMA reduction mechanism by pre-ozonation during chloramination of ranitidine may be due to the production of oxidation products with less NDMA yield (such as DMA) than parent compound. Based on the result of Q-TOF and GC-MS/MS analysis, three possible transformation pathways were proposed. Different influences of oxidation conditions and water quality parameters suggest that strategies to reduce NDMA formation should vary with drinking water sources and choose optimal ozone dosage.
Collapse
Affiliation(s)
- Rusen Zou
- Institute of Municipal and Environmental Engineering, College of Civil Engineering, Huaqiao University, Xiamen, 361021, China
| | - Xiaobin Liao
- Institute of Municipal and Environmental Engineering, College of Civil Engineering, Huaqiao University, Xiamen, 361021, China.
| | - Lei Zhao
- Institute of Municipal and Environmental Engineering, College of Civil Engineering, Huaqiao University, Xiamen, 361021, China
| | - Baoling Yuan
- Institute of Municipal and Environmental Engineering, College of Civil Engineering, Huaqiao University, Xiamen, 361021, China.
| |
Collapse
|
9
|
Raj I, Vaidya AN, Pandey RA, Bansiwal A, Deshmukh S, Purohit HJ. Recent advancements in the mitigation of obnoxious nitrogenous gases. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2018; 205:319-336. [PMID: 29035719 DOI: 10.1016/j.jenvman.2017.09.064] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Revised: 09/05/2017] [Accepted: 09/23/2017] [Indexed: 06/07/2023]
Abstract
Nitrogenous gaseous emissions commonly have an obnoxious odor associated with it, which when discharged into the environment results in serious environmental problems and health hazards. Several strategies for mitigation of nitrogenous odorants have been reported which include physical, chemical and biological methods. Biological treatments are widely employed because of their efficiency even at low concentration, where physical and chemical methods are not effective. Most commonly used biological treatment methods are biofiltration, biotrickling filters and membrane bioreactors with innovative reactor design, mixing pattern, and air sparging, for example FEBR, ALR, etc. These treatment methods require a critical assessment for the mitigation of obnoxious nitrogen emissions, especially in the context of environmental protection. This review offers a critical evaluation of treatment methods for the mitigation of nitrogenous odorous compound with a key emphasis on biological treatment systems. Also, various mathematical modelling techniques required for optimized operation of biotreatment systems has been discussed.
Collapse
Affiliation(s)
- Ishan Raj
- Environmental Biotechnology and Genomics Division, CSIR - National Environmental Engineering Research Institute, Nehru Marg, Nagpur, 440020, Maharashtra, India
| | - A N Vaidya
- Solid and Hazardous Waste Management Division, CSIR - National Environmental Engineering Research Institute, Nehru Marg, Nagpur, 440020, Maharashtra, India
| | - R A Pandey
- Environmental Biotechnology Division, CSIR-NEERI, Nagpur, India.
| | - Amit Bansiwal
- Environmental Material Division, CSIR - National Environmental Engineering Research Institute, Nehru Marg, Nagpur, 440020, Maharashtra, India
| | - Sharvari Deshmukh
- Environmental Biotechnology and Genomics Division, CSIR - National Environmental Engineering Research Institute, Nehru Marg, Nagpur, 440020, Maharashtra, India
| | - Hemant J Purohit
- Environmental Biotechnology and Genomics Division, CSIR - National Environmental Engineering Research Institute, Nehru Marg, Nagpur, 440020, Maharashtra, India
| |
Collapse
|
10
|
Liu C, Olivares CI, Pinto AJ, Lauderdale CV, Brown J, Selbes M, Karanfil T. The control of disinfection byproducts and their precursors in biologically active filtration processes. WATER RESEARCH 2017; 124:630-653. [PMID: 28822343 DOI: 10.1016/j.watres.2017.07.080] [Citation(s) in RCA: 73] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2017] [Revised: 07/30/2017] [Accepted: 07/31/2017] [Indexed: 06/07/2023]
Abstract
While disinfection provides hygienically safe drinking water, the disinfectants react with inorganic or organic precursors, leading to the formation of harmful disinfection byproducts (DBPs). Biological filtration is a process in which an otherwise conventional granular filter is designed to remove not only fine particulates but also dissolved organic matters (e.g., DBP precursors) through microbially mediated degradation. Recently, applications of biofiltration in drinking water treatment have increased significantly. This review summarizes the effectiveness of biofiltration in removing DBPs and their precursors and identifies potential factors in biofilters that may control the removal or contribute to formation of DBP and their precursors during drinking water treatment. Biofiltration can remove a fraction of the precursors of halogenated DBPs (trihalomethanes, haloacetic acids, haloketones, haloaldehydes, haloacetonitriles, haloacetamides, and halonitromethanes), while also demonstrating capability in removing bromate and halogenated DBPs, except for trihalomethanes. However, the effectiveness of biofiltration mediated removal of nitrosamine and its precursors appears to be variable. An increase in nitrosamine precursors after biofiltration was ascribed to the biomass sloughing off from media or direct nitrosamine formation in the biofilter under certain denitrifying conditions. Operating parameters, such as pre-ozonation, media type, empty bed contact time, backwashing, temperature, and nutrient addition may be optimized to control the regulated DBPs in the biofilter effluent while minimizing the formation of unregulated emerging DBPs. While summarizing the state of knowledge of biofiltration mediated control of DBPs, this review also identifies several knowledge gaps to highlight future research topics of interest.
Collapse
Affiliation(s)
- Chao Liu
- Department of Environmental Engineering and Earth Sciences, Clemson University, Anderson, SC 29625, USA
| | - Christopher I Olivares
- Department of Environmental Engineering and Earth Sciences, Clemson University, Anderson, SC 29625, USA
| | - Ameet J Pinto
- Department of Civil & Environmental Engineering, Northeastern University, 269 SN, 360 Huntington Avenue, Boston, MA 02115, USA
| | | | - Jess Brown
- Carollo Engineers, Inc., 3150 Bristol Street, Suite 500, Costa Mesa, CA 92929, USA
| | - Meric Selbes
- Hazen and Sawyer, Environmental Engineers and Scientists, Fairfax, VA 22030, USA
| | - Tanju Karanfil
- Department of Environmental Engineering and Earth Sciences, Clemson University, Anderson, SC 29625, USA.
| |
Collapse
|
11
|
Cortes-Tolalpa L, Salles JF, van Elsas JD. Bacterial Synergism in Lignocellulose Biomass Degradation - Complementary Roles of Degraders As Influenced by Complexity of the Carbon Source. Front Microbiol 2017; 8:1628. [PMID: 29067002 PMCID: PMC5641323 DOI: 10.3389/fmicb.2017.01628] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Accepted: 08/10/2017] [Indexed: 01/23/2023] Open
Abstract
Lignocellulosic biomass (LCB) is an attractive source of carbon for the production of sugars and other chemicals. Due to its inherent complexity and heterogeneity, efficient biodegradation requires the actions of different types of hydrolytic enzymes. In nature, complex microbial communities that work efficiently and often synergistically accomplish degradation. Studying such synergisms in LCB degradation is fundamental for the establishment of an optimal biological degradation process. Here, we examine the wheat straw degradation potential of synthetic microbial consortia composed of bacteria and fungi. Growth of, and enzyme secretion by, monocultures of degrader strains were studied in aerobic cultures using wheat straw as the sole carbon and energy source. To investigate synergism, co-cultures were constructed from selected strains and their performance was tested in comparison with the respective monocultures. In monoculture, each organism – with a typical enzymatic profile – was found to mainly consume the cellulose part of the substrate. One strain, Flavobacterium ginsengisoli so9, displayed an extremely high degradation capacity, as measured by its secreted enzymes. Among 13 different co-cultures, five presented synergisms. These included four bacterial bicultures and one bacterial–fungal triculture. The highest level of synergism was found in a Citrobacter freundii/Sphingobacterium multivorum biculture, which revealed an 18.2-fold increase of the produced biomass. As compared to both monocultures, this bacterial pair showed significantly increased enzymatic activities, in particular of cellobiohydrolases, mannosidases, and xylosidases. Moreover, the synergism was unique to growth on wheat straw, as it was completely absent in glucose-grown bicultures. Spent supernatants of either of the two partners were found to stimulate the growth on wheat straw of the counterpart organism, in a directional manner. Thus, the basis of the LCB-specific synergism might lie in the specific release of compounds or agents by S. multivorum w15 that promote the activity of C. freundii so4 and vice versa.
Collapse
Affiliation(s)
- Larisa Cortes-Tolalpa
- Department of Microbial Ecology, Groningen Institute for Evolutionary Life Sciences, University of Groningen, Groningen, Netherlands
| | - Joana F Salles
- Department of Microbial Ecology, Groningen Institute for Evolutionary Life Sciences, University of Groningen, Groningen, Netherlands
| | - Jan Dirk van Elsas
- Department of Microbial Ecology, Groningen Institute for Evolutionary Life Sciences, University of Groningen, Groningen, Netherlands
| |
Collapse
|
12
|
Bei E, Shu Y, Li S, Liao X, Wang J, Zhang X, Chen C, Krasner S. Occurrence of nitrosamines and their precursors in drinking water systems around mainland China. WATER RESEARCH 2016; 98:168-75. [PMID: 27105030 DOI: 10.1016/j.watres.2016.04.013] [Citation(s) in RCA: 104] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Revised: 04/02/2016] [Accepted: 04/08/2016] [Indexed: 05/27/2023]
Abstract
N-Nitrosamines (NAs) in drinking water have attracted considerable attention in recent years due to their high carcinogenicity, frequent occurrence, and their potential regulation. During the past three years, we have collected about 164 water samples of finished water, tap water, and source water from 23 provinces, 44 cities from large cities to small towns, and 155 sampling points all over China. The occurrence of NAs in the finished and tap water was much higher in China than that in the U.S. Nine NAs were measured and NDMA had the highest concentration. The occurrence of NDMA was in 33% of the finished waters of water treatment plants and in 41% of the tap waters. The average NDMA concentration in finished and tap waters was 11 and 13 ng/L, respectively. Formation potentials (FPs) of source waters were examined with an average NDMA FP of 66 ng/L. Large variations in NA occurrence were observed geographically in China and temporally in different seasons. The Yangtze River Delta area, one sub-area in East China, had the highest concentrations of NAs, where the average NDMA concentrations in the finished and tap water were 27 and 28.5 ng/L, respectively, and the average NDMA FP in the source water was 204 ng/L. NA control may be achieved by applying breakpoint free chlorination and/or advanced treatment of ozone - granular activated carbon process to remove the NA precursors before disinfection.
Collapse
Affiliation(s)
- Er Bei
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China
| | - Yuanyuan Shu
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China
| | - Shixiang Li
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China
| | - Xiaobin Liao
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China; College of Civil Engineering, Huaqiao University, Xiamen, 361021, China
| | - Jun Wang
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China
| | - Xiaojian Zhang
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China
| | - Chao Chen
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China.
| | - Stuart Krasner
- Metropolitan Water District of Southern California, 700 Moreno Avenue, La Verne, CA, 91750, USA
| |
Collapse
|
13
|
Gu Q, Wu Q, Zhang J, Guo W, Wu H, Sun M. Community Analysis and Recovery of Phenol-degrading Bacteria from Drinking Water Biofilters. Front Microbiol 2016; 7:495. [PMID: 27148185 PMCID: PMC4828441 DOI: 10.3389/fmicb.2016.00495] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2015] [Accepted: 03/27/2016] [Indexed: 11/13/2022] Open
Abstract
Phenol is a ubiquitous organic contaminant in drinking water. Biodegradation plays an important role in the elimination of phenol pollution in the environment, but the information about phenol removal by drinking water biofilters is still lacking. Herein, we study an acclimated bacterial community that can degrade over 80% of 300 mg/L phenol within 3 days. PCR detection of genotypes involved in bacterial phenol degradation revealed that the degradation pathways contained the initial oxidative attack by phenol hydroxylase, and subsequent ring fission by catechol 1,2-dioxygenase. Based on the PCR denatured gradient gel electrophoresis (PCR-DGGE) profiles of bacteria from biological activated carbon (BAC), the predominant bacteria in drinking water biofilters including Delftia sp., Achromobacter sp., and Agrobacterium sp., which together comprised up to 50% of the total microorganisms. In addition, a shift in bacterial community structure was observed during phenol biodegradation. Furthermore, the most effective phenol-degrading strain DW-1 that correspond to the main band in denaturing gradient gel electrophoresis (DGGE) profile was isolated and identified as Acinetobacter sp., according to phylogenetic analyses of the 16S ribosomal ribonucleic acid (rRNA) gene sequences. The strain DW-1 also produced the most important enzyme, phenol hydroxylase, and it also exhibited a good ability to degrade phenol when immobilized on granular active carbon (GAC). This study indicates that the enrichment culture has great potential application for treatment of phenol-polluted drinking water sources, and the indigenous phenol-degrading microorganism could recover from drinking water biofilters as an efficient resource for phenol removal. Therefore, the aim of this study is to draw attention to recover native phenol-degrading bacteria from drinking water biofilters, and use these native microorganisms as phenolic water remediation in drinking water sources.
Collapse
Affiliation(s)
- Qihui Gu
- School of Bioscience and Bioengineering, South China University of TechnologyGuangzhou, China; Guangdong Institute of Microbiology, State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied MicrobiologyGuangzhou, China
| | - Qingping Wu
- Guangdong Institute of Microbiology, State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology Guangzhou, China
| | - Jumei Zhang
- Guangdong Institute of Microbiology, State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology Guangzhou, China
| | - Weipeng Guo
- Guangdong Institute of Microbiology, State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology Guangzhou, China
| | - Huiqing Wu
- Guangdong Institute of Microbiology, State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology Guangzhou, China
| | - Ming Sun
- Guangdong Institute of Microbiology, State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology Guangzhou, China
| |
Collapse
|
14
|
Ghosh S, Chowdhury R, Bhattacharya P. Mixed consortia in bioprocesses: role of microbial interactions. Appl Microbiol Biotechnol 2016; 100:4283-95. [DOI: 10.1007/s00253-016-7448-1] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Revised: 03/03/2016] [Accepted: 03/08/2016] [Indexed: 12/22/2022]
|
15
|
Liao X, Li B, Zou R, Dai Y, Xie S, Yuan B. Biodegradation of antibiotic ciprofloxacin: pathways, influential factors, and bacterial community structure. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:7911-7918. [PMID: 26762935 DOI: 10.1007/s11356-016-6054-1] [Citation(s) in RCA: 95] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2015] [Accepted: 01/04/2016] [Indexed: 06/05/2023]
Abstract
Antibiotic ciprofloxacin is ubiquitous in the environment. However, little is known about ciprofloxacin dissipation by microbial community. The present study investigated the biodegradation potential of ciprofloxacin by mixed culture and the influential factors and depicted the structure of ciprofloxacin-degrading microbial community. Both the original microbiota from drinking water biofilter and the microbiota previously acclimated to high levels of ciprofloxacin could utilize ciprofloxacin as sole carbon and nitrogen sources, while the acclimated microbiota had a much stronger removal capacity. Temperature rise and the presence of carbon or nitrogen sources favored ciprofloxacin biodegradation. Many novel biotransformation products were identified, and four different metabolic pathways for ciprofloxacin were proposed. Bacterial community structure illustrated a profound shift with ciprofloxacin biodegradation. The ciprofloxacin-degrading bacterial community was mainly composed of classes Gammaproteobacteria, Bacteroidia, and Betaproteobacteria. Microorganisms from genera Pseudoxanthomonas, Stenotrophomonas, Phenylobacterium, and Leucobacter might have links with the dissipation of ciprofloxacin. This work can provide some new insights towards ciprofloxacin biodegradation.
Collapse
Affiliation(s)
- Xiaobin Liao
- Institute of Municipal and Environmental Engineering, College of Civil Engineering, Huaqiao University, Xiamen, Fujian, 361021, People's Republic of China
| | - Bingxin Li
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China
| | - Rusen Zou
- Institute of Municipal and Environmental Engineering, College of Civil Engineering, Huaqiao University, Xiamen, Fujian, 361021, People's Republic of China
| | - Yu Dai
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China
| | - Shuguang Xie
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China.
| | - Baoling Yuan
- Institute of Municipal and Environmental Engineering, College of Civil Engineering, Huaqiao University, Xiamen, Fujian, 361021, People's Republic of China.
| |
Collapse
|
16
|
Liao X, Bei E, Li S, Ouyang Y, Wang J, Chen C, Zhang X, Krasner SW, Suffet IHM. Applying the polarity rapid assessment method to characterize nitrosamine precursors and to understand their removal by drinking water treatment processes. WATER RESEARCH 2015; 87:292-298. [PMID: 26433007 DOI: 10.1016/j.watres.2015.09.040] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Revised: 09/07/2015] [Accepted: 09/09/2015] [Indexed: 06/05/2023]
Abstract
Some N-nitrosamines (NAs) have been identified as emerging disinfection by-products during water treatment. Thus, it is essential to understand the characteristics of the NA precursors. In this study, the polarity rapid assessment method (PRAM) and the classical resin fractionation method were studied as methods to fractionate the NA precursors during drinking water treatment. The results showed that PRAM has much higher selectivity for NA precursors than the resin approach. The normalized N-nitrosodimethylamine formation potential (NDMA FP) and N-nitrosodiethylamine (NDEA) FP of four resin fractions was at the same level as the average yield of the bulk organic matter whereas that of the cationic fraction by PRAM showed 50 times the average. Thus, the cationic fraction was shown to be the most important NDMA precursor contributor. The PRAM method also helped understand which portions of the NA precursor were removed by different water treatment processes. Activated carbon (AC) adsorption removed over 90% of the non-polar PRAM fraction (that sorbs onto the C18 solid phase extraction [SPE] cartridge) of NDMA and NDEA precursors. Bio-treatment removed 80-90% of the cationic fraction of PRAM (that is retained on the cation exchange SPE cartridge) and 40-60% of the non-cationic fractions. Ozonation removed 50-60% of the non-polar PRAM fraction of NA precursors and transformed part of them into the polar fraction. Coagulation and sedimentation had very limited removal of various PRAM fractions of NA precursors.
Collapse
Affiliation(s)
- Xiaobin Liao
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China; College of Civil Engineering, Huaqiao University, Xiamen, 361021, China
| | - Er Bei
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China
| | - Shixiang Li
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China
| | - Yueying Ouyang
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China
| | - Jun Wang
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China
| | - Chao Chen
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China.
| | - Xiaojian Zhang
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China
| | - Stuart W Krasner
- Metropolitan Water District of Southern California, 700 Moreno Avenue, La Verne, CA 91750, USA
| | - I H Mel Suffet
- Department of Environmental Health Sciences, School of Public Health, UCLA, 90095, USA
| |
Collapse
|
17
|
Antibiotic sulfanilamide biodegradation by acclimated microbial populations. Appl Microbiol Biotechnol 2015; 100:2439-47. [DOI: 10.1007/s00253-015-7133-9] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2015] [Revised: 10/26/2015] [Accepted: 10/29/2015] [Indexed: 11/27/2022]
|
18
|
Liao X, Chen C, Xie S, Hanigan D, Wang J, Zhang X, Westerhoff P, Krasner SW. Nitrosamine Precursor Removal by BAC: A Case Study of Adsorption Versus Biotreatment. ACTA ACUST UNITED AC 2015. [DOI: 10.5942/jawwa.2015.107.0123] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- Xiaobin Liao
- College of Civil Engineering; Huaqiao University; Xiamen China
| | - Chao Chen
- School of Environment; Tsinghua University; Beijing
| | - Shuguang Xie
- College of Environmental Sciences and Engineering; Peking University; Beijing
| | - David Hanigan
- Department of Civil; Environmental and Sustainable Engineering, Arizona State University; Tempe Ariz
| | - Jun Wang
- School of Environment; Tsinghua University; Beijing
| | | | - Paul Westerhoff
- Department of Civil; Environmental and Sustainable Engineering, Arizona State University; Tempe Ariz
| | | |
Collapse
|