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Ameen F, Alsarraf MJ, Abalkhail T, Stephenson SL. Tannery effluent treatments with mangrove fungi, grass root biomass, and biochar. World J Microbiol Biotechnol 2024; 40:249. [PMID: 38907753 DOI: 10.1007/s11274-024-04055-2] [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: 04/02/2024] [Accepted: 06/14/2024] [Indexed: 06/24/2024]
Abstract
Tannery effluents contain high amounts of polluting chemicals, such as salts and heavy metals released often to surface waters. New economic and eco-friendly purification methods are needed. Two adsorbing materials and five salt-tolerant fungal isolates from mangrove habitat were studied. Purification experiments were carried out using the pollutant adsorbents biochar and the biomass of vetiver grass (Chrysopogon zizanioides) roots and the fungi Cladosporium cladosporioides, Phomopsis glabrae, Aspergillus niger, Emericellopsis sp., and Scopulariopsis sp., which were isolated from mangrove sediment. They efficacy to reduce pollutants was studied in different combinations. Salinity, turbidity, total dissolved solids, total suspended solids, phenols, nitrogen, ammonia. Biological and chemical oxygen demand (BOD, COD) and several heavy metals were measured. The adsorbents were efficient reducing the pollutants to 15-50% of the original. The efficiency of the combination of biochar and roots was generally at the same level as the adsorbents alone. Some pollutants such as turbidity, COD and ammonium were reduced slightly more by the combination than the adsorbents alone. From all 14 treatments, Emericellopsis sp. with biochar and roots appeared to be the most efficient reducing pollutants to < 10-30%. BOD and COD were reduced to ca 5% of the original. The treatment was efficient in reducing also heavy metals (As, Cd, Cr, Mn Pb, Zn). The fungal species originating from the environment instead of the strains present in the tannery effluent reduced pollutants remarkably and the adsorbents improved the reduction efficiency. However, the method needs development for effluents with high pollutant concentrations to fulfil the environmental regulations.
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Affiliation(s)
- Fuad Ameen
- Department of Botany & Microbiology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia.
| | - Mohammad J Alsarraf
- Department of Science, College of Basic Education, The Public Authority of Applied Education and Training (PAAET), Kuwait
| | - Tarad Abalkhail
- Department of Botany & Microbiology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Steven L Stephenson
- Department Biological Sciences, University of Arkansas, Fayetteville, AR, USA
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Trognon J, Rima M, Lajoie B, Roques C, El Garah F. NaCl-induced modulation of species distribution in a mixed P. aeruginosa / S. aureus / B.cepacia biofilm. Biofilm 2023; 6:100153. [PMID: 37711514 PMCID: PMC10497989 DOI: 10.1016/j.bioflm.2023.100153] [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: 06/16/2023] [Revised: 08/30/2023] [Accepted: 08/31/2023] [Indexed: 09/16/2023] Open
Abstract
Pseudomonas aeruginosa, Staphylococcus aureus, and Burkholderia cepacia are notorious pathogens known for their ability to form resilient biofilms, particularly within the lung environment of cystic fibrosis (CF) patients. The heightened concentration of NaCl, prevalent in the airway liquid of CF patients' lungs, has been identified as a factor that promotes the growth of osmotolerant bacteria like S. aureus and dampens host antibacterial defenses, thereby fostering favorable conditions for infections. In this study, we aimed to investigate how increased NaCl concentrations impact the development of multi-species biofilms in vitro, using both laboratory strains and clinical isolates of P. aeruginosa, S. aureus, and B. cepacia co-cultures. Employing a low-nutrient culture medium that fosters biofilm growth of the selected species, we quantified biofilm formation through a combination of adherent CFU counts, qPCR analysis, and confocal microscopy observations. Our findings reaffirmed the challenges faced by S. aureus in establishing growth within 1:1 mixed biofilms with P. aeruginosa when cultivated in a minimal medium. Intriguingly, at an elevated NaCl concentration of 145 mM, a symbiotic relationship emerged between S. aureus and P. aeruginosa, enabling their co-existence. Notably, this hyperosmotic environment also exerted an influence on the interplay of these two bacteria with B. cepacia. We demonstrated that elevated NaCl concentrations play a pivotal role in orchestrating the distribution of these three species within the biofilm matrix. Furthermore, our study unveiled the beneficial impact of NaCl on the biofilm growth of clinically relevant mucoid P. aeruginosa strains, as well as two strains of methicillin-sensitive and methicillin-resistant S. aureus. This underscores the crucial role of the microenvironment during the colonization and infection processes. The results suggest that hyperosmotic conditions could hold the key to unlocking a deeper understanding of the genesis and behavior of CF multi-species biofilms.
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Affiliation(s)
- Jeanne Trognon
- Laboratoire de Génie Chimique, Université de Toulouse, CNRS, INPT, UPS, Toulouse, France
| | - Maya Rima
- Laboratoire de Génie Chimique, Université de Toulouse, CNRS, INPT, UPS, Toulouse, France
| | - Barbora Lajoie
- Laboratoire de Génie Chimique, Université de Toulouse, CNRS, INPT, UPS, Toulouse, France
| | - Christine Roques
- Laboratoire de Génie Chimique, Université de Toulouse, CNRS, INPT, UPS, Toulouse, France
- CHU Toulouse, Hôpital Purpan, Service de Bactériologie Hygiène, Toulouse, France
| | - Fatima El Garah
- Laboratoire de Génie Chimique, Université de Toulouse, CNRS, INPT, UPS, Toulouse, France
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3
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Rahman Z, Thomas L, Chetri SPK, Bodhankar S, Kumar V, Naidu R. A comprehensive review on chromium (Cr) contamination and Cr(VI)-resistant extremophiles in diverse extreme environments. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:59163-59193. [PMID: 37046169 DOI: 10.1007/s11356-023-26624-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Accepted: 03/20/2023] [Indexed: 05/10/2023]
Abstract
Chromium (Cr) compounds are usually toxins and exist abundantly in two different forms, Cr(VI) and Cr(III), in nature. Their contamination in any environment is a major problem. Many extreme environments including cold climate, warm climate, acidic environment, basic/alkaline environment, hypersaline environment, radiation, drought, high pressure, and anaerobic conditions have accumulated elevated Cr contamination. These harsh physicochemical conditions associated with Cr(VI) contamination damage biological systems in various ways. However, several unique microorganisms belonging to phylogenetically distant taxa (bacteria, fungi, and microalgae) owing to different and very distinct physiological characteristics can withstand extremities of Cr(VI) in different physicochemical environments. These challenging situations offer great potential and extended proficiencies in extremophiles for environmental and biotechnological applications. On these issues, the present review draws attention to Cr(VI) contamination from diverse extreme environmental regions. The study gives a detailed account on the ecology and biogeography of Cr(VI)-resistant microorganisms in inhospitable environments, and their use for detoxifying Cr(VI) and other applications. The study also focuses on physiological, multi-omics, and genetic engineering approaches of Cr(VI)-resistant extremophiles.
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Affiliation(s)
- Zeeshanur Rahman
- Department of Botany, Zakir Husain Delhi College, University of Delhi, Delhi, India.
| | - Lebin Thomas
- Department of Botany, Hansraj College, University of Delhi, Delhi, India
| | - Siva P K Chetri
- Department of Botany, Dimoria College, Gauhati University, Guwahati, Assam, India
| | - Shrey Bodhankar
- Department of Agriculture Microbiology, School of Agriculture Sciences, Anurag University, Hyderabad, Telangana, India
| | - Vikas Kumar
- Department of Botany, University of Lucknow, Lucknow, Uttar Pradesh, India
| | - Ravi Naidu
- Global Centre for Environmental Remediation, University of Newcastle, Newcastle, Australia
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Singh A, Srivastava A, Saidulu D, Gupta AK. Advancements of sequencing batch reactor for industrial wastewater treatment: Major focus on modifications, critical operational parameters, and future perspectives. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 317:115305. [PMID: 35642808 DOI: 10.1016/j.jenvman.2022.115305] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Revised: 04/24/2022] [Accepted: 05/11/2022] [Indexed: 06/15/2023]
Abstract
Industrial wastewater discharge has increased manifolds over the last few decades. Efficient industrial wastewater treatment is mandatory to meet stringent discharge regulations. Biological treatment systems, such as the sequencing batch reactor (SBR) are generally employed for domestic wastewater treatment. However, low infrastructure and energy requirements, as well as low footprint, make SBR a prominent technique to treat industrial wastewater. In the present review, the feasibility of SBR to treat wastewater generated from industries, such as textile, pulp and paper, pharmaceutical, tannery, etc., has been discussed. The factors affecting the treatment efficacy of the SBR in terms of organics and nutrient removal have also been investigated. It has been observed that the SBR system is effective for industrial wastewater treatment as it is easy to operate, resistant to shock loads, and can retain high biomass concentrations. The modifications to the conventional SBR, such as sludge granulation, the addition of bio-film carriers, and the incorporation of adsorbents, salt-tolerant microbes, and coagulants have been discussed. Further, various novel combinations of SBR with the other advanced treatment technologies, such as Fenton, membrane-based process, and electrochemical process have shown enhanced removal of various conventional and recalcitrant pollutants. The current review also accentuates the sustainability aspects of SBR technology to treat industrial wastewater which may be beneficial for researchers and engineers working in this field.
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Affiliation(s)
- Adarsh Singh
- Environmental Engineering Division, Department of Civil Engineering, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India
| | - Ashish Srivastava
- School of Environmental Science and Engineering, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India
| | - Duduku Saidulu
- Environmental Engineering Division, Department of Civil Engineering, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India
| | - Ashok Kumar Gupta
- Environmental Engineering Division, Department of Civil Engineering, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India.
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Dang BT, Tran DPH, Nguyen NKQ, Cao HTN, Tomoaki I, Huynh KPH, Pham TT, Varjani S, Hao Ngo H, Wang YF, You SJ, Bui XT. Comparison of degradation kinetics of tannery wastewater treatment using a nonlinear model by salt-tolerant Nitrosomonas sp. and Nitrobacter sp. BIORESOURCE TECHNOLOGY 2022; 351:127000. [PMID: 35292387 DOI: 10.1016/j.biortech.2022.127000] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 03/08/2022] [Accepted: 03/09/2022] [Indexed: 06/14/2023]
Abstract
Conventional biological treatment has been reported to be ineffective for pollutant removal in tannery wastewater due to high salinity. To overcome it, this work used salt-tolerant bacteria (STB) isolated from a membrane bioreactor to evaluate the organic and nutrient removal through a series of batch experiments. Compared with the control, the STB reactor enhanced the reduction of persistent organics by 11% based on the double exponential decay model. Besides, the removal of NH4+-N is 26% higher, satisfying the first-order decay model. The nitrification was inhibited entirely in control during 48 h, whilst the assimilation process involved 55% of total nitrogen removal. In the STB reactor, nitrification occurred after 12 h, resulting in significantly increased NO2--N and NO3--N concentrations according to the logistic function. Although nitrification was successfully activated, C/N ratios and free ammonia were identified as limiting factors for STB activity, requiring mitigation strategies in further studies.
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Affiliation(s)
- Bao-Trong Dang
- HUTECH University, 475A Dien Bien Phu, Ward 25, Binh Thanh District, Ho Chi Minh City, Viet Nam
| | - Duyen P H Tran
- Key Laboratory of Advanced Waste Treatment Technology, Ho Chi Minh City University of Technology (HCMUT), Vietnam National University Ho Chi Minh (VNU-HCM), Thu Duc City, Ho Chi Minh City, Viet Nam
| | - Ngoc-Kim-Qui Nguyen
- Key Laboratory of Advanced Waste Treatment Technology, Ho Chi Minh City University of Technology (HCMUT), Vietnam National University Ho Chi Minh (VNU-HCM), Thu Duc City, Ho Chi Minh City, Viet Nam
| | - Huong T N Cao
- Faculty of Environment and Natural Resources, Ho Chi Minh City University of Technology (HCMUT), Ho Chi Minh City 700000, 268 Ly Thuong Kiet Str., District 10, Ho Chi Minh City, Viet Nam
| | - Itayama Tomoaki
- Graduate School of Engineering, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan
| | - Ky-Phuong-Ha Huynh
- Key Laboratory of Advanced Waste Treatment Technology, Ho Chi Minh City University of Technology (HCMUT), Vietnam National University Ho Chi Minh (VNU-HCM), Thu Duc City, Ho Chi Minh City, Viet Nam; Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Viet Nam
| | - Tan-Thi Pham
- Key Laboratory of Advanced Waste Treatment Technology, Ho Chi Minh City University of Technology (HCMUT), Vietnam National University Ho Chi Minh (VNU-HCM), Thu Duc City, Ho Chi Minh City, Viet Nam; Faculty of Applied Sciences, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Viet NamNam
| | - Sunita Varjani
- Gujarat Pollution Control Board, Gandhinagar 382010, Gujarat, India
| | - Huu Hao Ngo
- School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NWS 2007, Australia
| | - Ya-Fen Wang
- Department of Environmental Engineering & Center for Environmental Risk Management, Chung Yuan Christian University, Taoyuan 32023, Taiwan
| | - Sheng-Jie You
- Department of Environmental Engineering & Center for Environmental Risk Management, Chung Yuan Christian University, Taoyuan 32023, Taiwan
| | - Xuan-Thanh Bui
- Key Laboratory of Advanced Waste Treatment Technology, Ho Chi Minh City University of Technology (HCMUT), Vietnam National University Ho Chi Minh (VNU-HCM), Thu Duc City, Ho Chi Minh City, Viet Nam; Faculty of Environment and Natural Resources, Ho Chi Minh City University of Technology (HCMUT), Ho Chi Minh City 700000, 268 Ly Thuong Kiet Str., District 10, Ho Chi Minh City, Viet Nam.
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Zhao J, Wu Q, Tang Y, Zhou J, Guo H. Tannery wastewater treatment: conventional and promising processes, an updated 20-year review. JOURNAL OF LEATHER SCIENCE AND ENGINEERING 2022. [DOI: 10.1186/s42825-022-00082-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
Abstract
AbstractMismanagement of various wastes especially waste water produced by tanning processes has caused serious environmental problems and ultimately impaired human health. Constant efforts have been making to alleviate the pollution of tannery wastewater (TWW), yet terminal treatment still takes dominance. In this review, research on TWW treatment from 2000 to 2021 was summarized, and main methods such as coagulation and flocculation, adsorption, biological treatment, membrane filtration, advanced oxidation process were briefly discussed. More detailed introduction was given to the method of electrochemical treatment since it has excellent performance such as environmental friendliness and high efficiency, hence attracting more and more research attention in recent years. In view of the harsh physi-chemical conditions of TWW, integrated or combined treatment methods are accordingly recommended with better performance and multi-function, however comprehensive studies on optimization of methods combination and cost-effectiveness are needed. The certain issues that the residue Cr in treatment sludge and high salinity in effluent still remain were put forward in this work and potential solutions were provided. Moreover, this review proposed the perspective that realizing multi-function, recycling, and intensification should be the developing direction for future TWW treatment. This review is expected to provide a general guide for researchers who aspire to ameliorate TWW pollution problems and understand various methods utilized in this field.
Graphical abstract
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7
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Zhang HL, Hu YQ, Zhang Y, Qin DN, Wang H. Effects of pure oxygen aeration on organic pollutants removal performance and soluble microbial products characteristics of salt-tolerant activated sludge. ENVIRONMENTAL TECHNOLOGY 2022; 43:1471-1479. [PMID: 33063640 DOI: 10.1080/09593330.2020.1838622] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Accepted: 10/09/2020] [Indexed: 06/11/2023]
Abstract
The effects of pure oxygen aeration on organic pollutants removal performance and effluent soluble microbial products (SMP) characteristics of salt-tolerant sludge for the treatment of wastewater with the salinity from 1.0% to 3.5% were investigated. The results showed that the oxygen transfer efficiency of the pure oxygen aeration was higher than that of the air aeration. At the low salinities (0.5%, 1.0%, 1.5%), the total organic carbon (TOC) removal rates were 71.42%, 72.88% and 76.30%, respectively, much higher than those with air aeration. However, there were no significant differences of TOC removal efficiency between the air aeration and the pure oxygen aeration at high salinities (2.5% and 3.5%). The SMP contents showed a trend of first decline and then increase generally. The content of SMP with pure oxygen aeration was lower than that with air aeration at low salinity, whereas an opposite result was obtained for salinity above 2.5%. Five excitation-emission matrix (EEM) fluorescence peaks detected in the SMP with pure oxygen aeration and air aeration were assigned to tryptophan protein-like, tyrosine protein-like and humic acid-like substances. Humic acid-like fluorescence mainly appeared in the SMP with air aeration, which may be due to respiratory failure under air aeration conditions.
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Affiliation(s)
- Hong-Ling Zhang
- Nanjing Institute of Environmental Science, MEP, Nanjing, People's Republic of China
- School of the Environment, Nanjing Normal University, Nanjing, People's Republic of China
| | - Ya-Qi Hu
- School of the Environment, Nanjing Normal University, Nanjing, People's Republic of China
| | - Yong Zhang
- School of the Environment, Nanjing Normal University, Nanjing, People's Republic of China
- Key Laboratory of Virtual Geographic Environment (Nanjing Normal University), Ministry of Education, Nanjing, People's Republic of China
- State Key Laboratory Cultivation Base of Geographical Environment Evolution (Jiangsu Province), Nanjing, People's Republic of China
- Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing, People's Republic of China
| | - Dan-Ning Qin
- School of the Environment, Nanjing Normal University, Nanjing, People's Republic of China
| | - Hong Wang
- School of the Environment, Nanjing Normal University, Nanjing, People's Republic of China
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Budil J, Szabó O, Lišková P, Štenclová P, Izsák T, Potocký Š, Kromka A. Impact of electrolyte solution on electrochemical oxidation treatment of Escherichia coli K-12 by boron-doped diamond electrodes. Lett Appl Microbiol 2022; 74:924-931. [PMID: 35239229 DOI: 10.1111/lam.13687] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 01/27/2022] [Accepted: 02/25/2022] [Indexed: 11/29/2022]
Abstract
We studied the disinfection efficacy of boron-doped electrodes on Escherichia coli-contaminated water-based solutions in three different electrolytes, physiological solution (NaCl), phosphate buffer (PB), and phosphate buffer saline (PBS). The effect of the electrochemical oxidation treatment on the bacteria viability was studied by drop and spread plate cultivation methods, and supported by optical density measurements. We have found that bacterial suspensions in NaCl and PBS underwent a total inactivation of all viable bacteria within 10 min of the electrochemical treatment. By contrast, experiments performed in the PB showed a relatively minor decrease of viability by two orders of magnitude after two hours of the treatment, which is almost comparable with the untreated control. The enhanced bacterial inactivation was assigned to reactive chlorine species (RCS), capable of penetrating the bacterial cytoplasmic membrane and killing bacteria from within.
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Affiliation(s)
- Jakub Budil
- Institute of Physics of the Czech Academy of Sciences, Cukrovarnická 10, 162 00, Prague 6, Czech Republic.,Department of Genetics and Microbiology, Faculty of Science, Charles University, Viničná 5, 128 43 Prague 2, Czech Republic
| | - Ondrej Szabó
- Institute of Physics of the Czech Academy of Sciences, Cukrovarnická 10, 162 00, Prague 6, Czech Republic
| | - Petra Lišková
- Department of Genetics and Microbiology, Faculty of Science, Charles University, Viničná 5, 128 43 Prague 2, Czech Republic
| | - Pavla Štenclová
- Institute of Physics of the Czech Academy of Sciences, Cukrovarnická 10, 162 00, Prague 6, Czech Republic
| | - Tibor Izsák
- Institute of Physics of the Czech Academy of Sciences, Cukrovarnická 10, 162 00, Prague 6, Czech Republic.,Institute of Electrical Engineering, Slovak Academy of Sciences, Dúbravská cesta 9, 841 04, Bratislava, Slovakia
| | - Štěpán Potocký
- Institute of Physics of the Czech Academy of Sciences, Cukrovarnická 10, 162 00, Prague 6, Czech Republic
| | - Alexander Kromka
- Institute of Physics of the Czech Academy of Sciences, Cukrovarnická 10, 162 00, Prague 6, Czech Republic
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Gowd SC, Ramakrishna S, Rajendran K. Wastewater in India: An untapped and under-tapped resource for nutrient recovery towards attaining a sustainable circular economy. CHEMOSPHERE 2022; 291:132753. [PMID: 34780737 DOI: 10.1016/j.chemosphere.2021.132753] [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: 07/27/2021] [Revised: 10/21/2021] [Accepted: 10/30/2021] [Indexed: 06/13/2023]
Abstract
Wastewater (WW) contains nitrogen (N) and phosphorus (P), where N oxidizes to nitrate followed by denitrification to release N2 and P is accumulated in sludge. Higher concentrations of N and P leads to eutrophication and algal blooming, thereby threatening the aquatic life systems. Such nutrients could be potentially recovered avoiding the fertilizer requirements. Distinct nutrient recovery systems have been demonstrated including chemical precipitation, ion-exchange, adsorption, bio-electrochemical systems, and biological assimilation at various scales of volumes. This study focusses on the nutrient recovery possibility from wastewater in India. The resource estimation analysis indicates that at 80% recovery, 1 million liters per day (MLD) of sewage can generate 17.3-kg of struvite using chemical precipitation. When compared with traditional fertilizers, nutrient recovery from sewage has the potential to avoid 0.38-Mt/a in imports. Replacing conventional fertilizer with struvite recovered from WW avoids 663.2 kg CO2eq/ha in emissions (53%). Prevailing WW treatment looks at maintaining the discharging standards while recovering nutrients is an advanced option for a self-reliant and sustainable circular economy. However, more detailed assessments are necessary from techno-economic and environmental perspective in realizing these technologies at an industrial scale.
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Affiliation(s)
- Sarath C Gowd
- Department of Environmental Science, School of Engineering and Sciences, SRM University-AP, Andhra Pradesh, India.
| | - Seeram Ramakrishna
- Department of Mechanical Engineering, Center for Nanofibers and Nanotechnology, National University of Singapore, Singapore, 119260, Singapore.
| | - Karthik Rajendran
- Department of Environmental Science, School of Engineering and Sciences, SRM University-AP, Andhra Pradesh, India.
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Jin B, Liu Y, Li X, Hou J, Bai Z, Niu J, Wang L, Zhao J. New insights into denitrification and phosphorus removal with degradation of polycyclic aromatic hydrocarbons in two-sludge system. BIORESOURCE TECHNOLOGY 2022; 346:126610. [PMID: 34954360 DOI: 10.1016/j.biortech.2021.126610] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Revised: 12/15/2021] [Accepted: 12/17/2021] [Indexed: 06/14/2023]
Abstract
Polycyclic aromatic hydrocarbons (PAHs) have led to failure of waste water treatment plant operations. In this study, a two-sludge system was used to solve this problem of simultaneously removing phosphorus, nitrogen, and PAHs. The results showed that increasing the maximum PAHs concentration to 15 mg/L did not have any negative effect on the removal rates of total nitrogen (79.68%) and chemical oxygen demand (75.94%); however, the phosphorus removal efficiency decreased to 61.16%. The system exhibited a stronger degradation ability for phenanthrene. Thauera, Hydrogenophaga, and Hyphomicrobium were enriched, which resulted in good denitrification, and contributed to PAHs removal. PAHs mixture promoted PAHs functional genes but restrained denitrification functional genes. However, single naphthalene enhanced denitrification functional genes, which confirmed the feasibility of denitrification coupled with PAHs degradation. In conclusion, for the removal of pollutants from sewage treatment, nitrogen and phosphorus removal coupled with PAHs could be maintained by selecting a two-sludge system.
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Affiliation(s)
- Baodan Jin
- Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China.
| | - Ye Liu
- Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China
| | - Xia Li
- Huaxin College of Hebei Geo University, Shijiazhuang 050700, China
| | - Jiahui Hou
- Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China
| | - Zhixuan Bai
- Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China
| | - Jintao Niu
- Henan Hengan Environmental Protection Technology Co., Ltd, Zhengzhou 450001, China
| | - Lan Wang
- Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China
| | - Jianguo Zhao
- Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China
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Meganathan B, Rathinavel T, Rangaraj S. Trends in microbial degradation and bioremediation of emerging contaminants. PHYSICAL SCIENCES REVIEWS 2021. [DOI: 10.1515/psr-2021-0060] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Modernization and modern ways of living demands more improved products from pharmaceuticals, cosmetics, and food processing industries. Moreover, industries like pesticides, fertilizers, dyeing, paints, detergent etc., also needs improvised products as per demand. As the new product emerges, the pollutants from these industries also constitute new type of danger to the environment and serious health risks to the living organisms. These emerging contaminants (ECs) are from different category of sources such as personal care products (PCPs), pharmaceuticals (Phcs), endocrine disrupting chemicals (EDCs), etc. These ECs can easily escape from the conventional water treatment and eventually get discharged in to the surface water and thus enters in to the ground water, soil, sediments, and also into the oceans. When these contaminants emerge we also require progress in tremendous process for preventing these hazardous chemicals by effective removal and treatment. For the past 50 years, both developed and developing countries are working on this treatment process and found that Microbial degradation and bioremediation are very useful for effective treatment to prevent their emissions. This treatment can be designed for any sort of ECs since the microbial members are so versatile to redesign their metabolic pathways when subject to exposure. However, implementing bioremediation is not alone efficient to degrade ECs and hence, combination of bioremediation, nanotechnology and physical treatment method will also provide sustainable, potent and fast degradation process. In this Book Chapter, we discuss in detail about the ECs, sources of microbial degradation process and its usefulness in the bioremediation of these ECs.
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Affiliation(s)
| | | | - Suriyaprabha Rangaraj
- Department of Biotechnology , Sona College of Arts and Science , Salem 636 005 , India
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Lin L, Pratt S, Crick O, Xia J, Duan H, Ye L. Salinity effect on freshwater Anammox bacteria: Ionic stress and ion composition. WATER RESEARCH 2021; 188:116432. [PMID: 33068907 DOI: 10.1016/j.watres.2020.116432] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 08/04/2020] [Accepted: 09/15/2020] [Indexed: 06/11/2023]
Abstract
The biggest challenge to apply Anammox to treat wastewater with elevated salt content is the inhibitory effect of salinity on freshwater Anammox bacteria (FAB). Most of the research into salinity inhibition has focused on the osmotic pressure effect, while the inhibitory effect and its mechanisms induced by ion composition are poorly understood. In this study, the individual and combined effect of NaCl, KCl and Na2SO4 on FAB (>99% belonging to Ca. Brocadia genera) were systematically investigated by batch tests. The corresponding responses of mRNA abundance of three functional genes (including nitrite reductase gene (nirS), hydrazine synthase gene (hzsB) and hydrazine dehydrogenase gene (hdh)) under different salt conditions were analyzed. The results indicated that NaCl, KCl and Na2SO4 have different inhibition effects, with the 50% inhibition at 0.106, 0.096 and 0.063 M, respectively. The combined inhibition of NaCl+KCl and NaCl+Na2SO4 on FAB were both synergistic; while the combined inhibition of NaCl+KCl+Na2SO4 was additive. The responses of mRNA (of genes: nirS, hzsB and hdh) suggested NaCl inhibited the transport of ammonium; Na2SO4 inhibited both nitrite and ammonium transport; high salinity inhibited functional enzyme activity. These results suggest both ionic stress and ion composition contributed to the observed inhibition.
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Affiliation(s)
- Limin Lin
- School of Chemical Engineering, The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia
| | - Steven Pratt
- School of Chemical Engineering, The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia
| | - Oliver Crick
- School of Chemical Engineering, The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia
| | - Jun Xia
- Advanced Water Management Centre (AWMC), The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia
| | - Haoran Duan
- School of Chemical Engineering, The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia
| | - Liu Ye
- School of Chemical Engineering, The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia.
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13
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Application of an immobilized microbial consortium for the treatment of pharmaceutical wastewater: Batch-wise and continuous studies. Chin J Chem Eng 2021. [DOI: 10.1016/j.cjche.2020.04.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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14
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Yan B, Luo L, Yang H. Isolation and characterization of Aeromonas sp. TXBc10 capable of high-efficiency degradation of octylphenol polyethoxylate from tannery wastewater. ENVIRONMENTAL TECHNOLOGY 2020; 41:3722-3731. [PMID: 31120337 DOI: 10.1080/09593330.2019.1619842] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Accepted: 05/12/2019] [Indexed: 06/09/2023]
Abstract
Octylphenol polyethoxylate (OP n EO) is a potential endocrine-disrupting chemical. Biodegradation of OP n EO was investigated using the bacterium Aeromonas sp. TXBc10 isolated from the influent of tannery waste treatment plant in Hunan Province, China. The bacterium was capable of utilizing OP n EO as the sole source of carbon and energy while OP n EO was degraded under aerobic batch culture conditions. Microbial degradation of OP n EO was studied in batch experiments for optimization of environmental factors. The effect of initial OP n EO concentrations on the degradation was investigated between 100 and 1000 mg·L-1 and the results showed that the biodegradation process conformed to the first-order kinetic model. The optimum pH, temperature, salinity and size of inoculum for OP n EO degradation by Aeromonas sp. TXBc10 was found to be 8.0°C, 30°C, 2.5% and 2.0%, respectively. The major metabolites of OP n EO degradation were identified as short-chain octylphenol polyethoxylate without octylphenol by high-performance liquid chromatography - mass spectrometer, which indicated that sequential cleavage of single ethoxylate units to form OP n- 1EC might be the transformation mechanism of strain TXBc10. Considering that strain TXBc10 exhibits prominent advantage for biodegradation of OP n EO, it might serve as a promising candidate for in situ remediation of OP n EO and compounds with similar structure in tannery wastewater.
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Affiliation(s)
- Binghua Yan
- College of Resources and Environment, Hunan Agricultural University, Changsha, People's Republic of China
- Lab of Waste Valorization and Water Reuse, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, People's Republic of China
| | - Lin Luo
- College of Resources and Environment, Hunan Agricultural University, Changsha, People's Republic of China
| | - Haijun Yang
- College of Plant Protection, Hunan Agricultural University, Changsha, People's Republic of China
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15
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Zhou G, Wang X, Zhao H, Zhang W, Liu G, Zhang X. Isolation of two salt-tolerant strains from activated sludge and its COD degradation characteristics from saline organic wastewater. Sci Rep 2020; 10:18421. [PMID: 33116186 PMCID: PMC7595179 DOI: 10.1038/s41598-020-75294-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Accepted: 10/06/2020] [Indexed: 12/04/2022] Open
Abstract
The efficient biological treatment of saline wastewater has been limited by the low activities of microorganisms under saline conditions. High salinity poses unbalance osmotic stress across the cell wall and even leads to cell plasmolysis. In this work, we aim to isolate salt-tolerant bacterial strains from activated sludge, and apply them for degrading chemical oxygen demand (COD) of saline organic wastewater. Two salt-tolerant strains were screened and isolated from activated sludge, which was domesticated with salty water for over 300 days. The two strains were identified as Bacillus cereus (strain A) and Bacillus anthracis (strain B) through 16S rRNA sequencing. The degradation characteristics of strain A were explored. The results showed the relative membrane permeability of strain A remained stable under high salt stress, which glycine and proline play an important role to maintain cell osmotic. The protein and soluble sugar amounts of strain were increased by higher salt concentrations. In simulating saline wastewater, the optimum culture temperature, pH, salinity, influent COD concentration and inoculation amount of strain A were 35 °C, 9, 4%, 8000 mg L−1, 6%, respectively. Optimal conditions could provide guidance for the treatment of practical saline wastewater. The linear regression model of each impact factor built based on the result PB experiment revealed that cross-linking time has the most significant influence on COD removal for salt-tolerant strains. It will provide theoretical basis for biological treatment of saline organic wastewater.
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Affiliation(s)
- Guizhong Zhou
- College of Environmental and Safety Engineering, Qingdao University of Science and Technology, Qingdao, 266042, People's Republic of China.
| | - Xitong Wang
- College of Environmental and Safety Engineering, Qingdao University of Science and Technology, Qingdao, 266042, People's Republic of China
| | - Huiyang Zhao
- College of Environmental and Safety Engineering, Qingdao University of Science and Technology, Qingdao, 266042, People's Republic of China
| | - Weiqian Zhang
- College of Environmental and Safety Engineering, Qingdao University of Science and Technology, Qingdao, 266042, People's Republic of China
| | - Guishan Liu
- College of Environmental and Safety Engineering, Qingdao University of Science and Technology, Qingdao, 266042, People's Republic of China
| | - Xinguo Zhang
- College of Environmental and Safety Engineering, Qingdao University of Science and Technology, Qingdao, 266042, People's Republic of China.,Environmental Protection Agency, Shandong SilverHawk Chemical Fiber Co. Ltd, Weifang, 261500, People's Republic of China
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16
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Golubeva P, Ryo M, Muller LAH, Ballhausen MB, Lehmann A, Sosa-Hernández MA, Rillig MC. Soil Saprobic Fungi Differ in Their Response to Gradually and Abruptly Delivered Copper. Front Microbiol 2020; 11:1195. [PMID: 32655517 PMCID: PMC7325975 DOI: 10.3389/fmicb.2020.01195] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Accepted: 05/12/2020] [Indexed: 11/29/2022] Open
Abstract
The overwhelming majority of studies examining environmental change deliver treatments abruptly, although, in fact, many important changes are gradual. One example of a gradually increasing environmental stressor is heavy metal contamination. Essential heavy metals, such as copper, play an important role within cells of living organisms but are toxic at higher concentrations. In our study, we focus on the effects of copper pollution on filamentous soil fungi, key players in terrestrial ecosystem functioning. We hypothesize that fungi exposed to gradually increasing copper concentrations have higher chances for physiological acclimation and will maintain biomass production and accumulate less copper, compared to fungi abruptly exposed to the highest copper concentration. To test this hypothesis, we conducted an experiment with 17 fungal isolates exposed to gradual and abrupt copper addition. Contrary to our hypothesis, we find diverse idiosyncratic responses, such that for many fungi gradually increasing copper concentrations have more severe effects (stronger growth inhibition and higher copper accumulation) than an abrupt increase. While a number of environmental change studies have accumulated evidence based on the magnitude of changes, the results of our study imply that the rate of change can be an important factor to consider in future studies in ecology, environmental science, and environmental management.
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Affiliation(s)
- Polina Golubeva
- Institut für Biologie, Freie Universität Berlin, Berlin, Germany.,Berlin-Brandenburg Institute of Advanced Biodiversity Research (BBIB), Berlin, Germany
| | - Masahiro Ryo
- Institut für Biologie, Freie Universität Berlin, Berlin, Germany.,Berlin-Brandenburg Institute of Advanced Biodiversity Research (BBIB), Berlin, Germany
| | - Ludo A H Muller
- Institut für Biologie, Freie Universität Berlin, Berlin, Germany.,Berlin-Brandenburg Institute of Advanced Biodiversity Research (BBIB), Berlin, Germany
| | - Max-Bernhard Ballhausen
- Institut für Biologie, Freie Universität Berlin, Berlin, Germany.,Berlin-Brandenburg Institute of Advanced Biodiversity Research (BBIB), Berlin, Germany
| | - Anika Lehmann
- Institut für Biologie, Freie Universität Berlin, Berlin, Germany.,Berlin-Brandenburg Institute of Advanced Biodiversity Research (BBIB), Berlin, Germany
| | - Moisés A Sosa-Hernández
- Institut für Biologie, Freie Universität Berlin, Berlin, Germany.,Berlin-Brandenburg Institute of Advanced Biodiversity Research (BBIB), Berlin, Germany
| | - Matthias C Rillig
- Institut für Biologie, Freie Universität Berlin, Berlin, Germany.,Berlin-Brandenburg Institute of Advanced Biodiversity Research (BBIB), Berlin, Germany
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17
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Ngoc LTB, Tu TA, Hien LTT, Linh DN, Tri N, Duy NPH, Cuong HT, Phuong PTT. Simple approach for the rapid estimation of BOD 5 in food processing wastewater. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:20554-20564. [PMID: 32274695 DOI: 10.1007/s11356-020-08703-6] [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: 02/03/2020] [Accepted: 03/31/2020] [Indexed: 06/11/2023]
Abstract
A simple approach was developed for the rapid and accurate estimation of 5-day biochemical oxygen demand (BOD5) in food processing wastewater. Immobilization of the natural microbial consortium that was collected from an aerobic compartment of a food processing wastewater treatment plant was simply performed by adhesion using a low-cost porous carrier. Pseudomonas aeruginosa, Bacillus cereus, and Streptomyces, whose salt-tolerance and ability to break down organic compounds have been widely reported, were found to be predominant. These microorganisms may cause an enhancement of the bioreactor response in the presence of sodium chloride. Consequently, a modified glucose-glutamic acid (GGA) calibration standard was proposed in which an appropriate amount of NaCl was added; this solution was found to be more effective in terms of accuracy and practicality than both conventional GGA and the synthetic wastewater recipe from the Organisation for Economic Cooperation and Development (OECD). The calibrated self-built packed-bed bioreactor exhibited good precision of 3% or less in predicting BOD5 in influent, which is similar to the performance of the most common commercial biochemical oxygen demand (BOD) bioreactors. There was a statistical agreement between the results obtained from this rapid BOD biosensor and the conventional methods, even when testing treated wastewater samples.
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Affiliation(s)
- Le Thi Bao Ngoc
- Ho Chi Minh City University of Science, 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
- Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Vietnam
- Vietnam Academy of Science and Technology-Institute of Chemical Technology, 1 Mac Dinh Chi Street, District 1, Ho Chi Minh City, Vietnam
| | - Tran Anh Tu
- Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Vietnam
| | - Luu Thi Thanh Hien
- Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Vietnam
| | - Duong Nhat Linh
- Ho Chi Minh City Open University, 97 Vo Van Tan Street, District 3, Ho Chi Minh City, Vietnam
| | - Nguyen Tri
- Vietnam Academy of Science and Technology-Institute of Chemical Technology, 1 Mac Dinh Chi Street, District 1, Ho Chi Minh City, Vietnam
- Ho Chi Minh City Open University, 97 Vo Van Tan Street, District 3, Ho Chi Minh City, Vietnam
| | - Nguyen Phuc Hoang Duy
- Vietnam Academy of Science and Technology-Institute of Chemical Technology, 1 Mac Dinh Chi Street, District 1, Ho Chi Minh City, Vietnam
| | - Hoang Tien Cuong
- Vietnam Academy of Science and Technology-Institute of Chemical Technology, 1 Mac Dinh Chi Street, District 1, Ho Chi Minh City, Vietnam
| | - Pham Thi Thuy Phuong
- Vietnam Academy of Science and Technology-Institute of Chemical Technology, 1 Mac Dinh Chi Street, District 1, Ho Chi Minh City, Vietnam.
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18
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Crone S, Vives-Flórez M, Kvich L, Saunders AM, Malone M, Nicolaisen MH, Martínez-García E, Rojas-Acosta C, Catalina Gomez-Puerto M, Calum H, Whiteley M, Kolter R, Bjarnsholt T. The environmental occurrence of Pseudomonas aeruginosa. APMIS 2019; 128:220-231. [PMID: 31709616 DOI: 10.1111/apm.13010] [Citation(s) in RCA: 148] [Impact Index Per Article: 29.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Accepted: 11/06/2019] [Indexed: 01/08/2023]
Abstract
Pseudomonas aeruginosa is generally described as ubiquitous in natural settings, such as soil and water. However, because anecdotal observations and published reports have questioned whether or not this description is true, we undertook a rigorous study using three methods to investigate the occurrence of P. aeruginosa: We investigated environmental samples, analyzed 16S rRNA data, and undertook a systematic review and meta-analysis of published data. The environmental sample screening identified P. aeruginosa as significantly associated with hydrocarbon and pesticide-contaminated environments and feces, as compared to uncontaminated environments in which its prevalence was relatively low. The 16S rRNA data analysis showed that P. aeruginosa sequences were present in all habitats but were most abundant in samples from human and animals. Similarly, the meta-analysis revealed that samples obtained from environments with intense human contact had a higher prevalence of P. aeruginosa compared to those with less human contact. Thus, we found a clear tendency of P. aeruginosa to be present in places closely linked with human activity. Although P. aeruginosa may be ubiquitous in nature, it is usually scarce in pristine environments. Thus, we suggest that P. aeruginosa should be described as a bacterium largely found in locations associated with human activity.
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Affiliation(s)
- Stephanie Crone
- Costerton Biofilm Center, Department of Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Martha Vives-Flórez
- Department of Biological Sciences, Universidad de los Andes, Bogotá, Colombia
| | - Lasse Kvich
- Costerton Biofilm Center, Department of Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Aaron M Saunders
- Department of Laboratory, Food and Environmental Science, Business Academy Aarhus, Viby J, Denmark
| | - Matthew Malone
- Infectious Diseases and Microbiology, School of Medicine, Western Sydney University, Sydney, Australia.,South West Sydney Limb Preservation and Wound Research, South Western Sydney Local Health District, Ingham Institute of Applied Medical Research, Sydney, Australia
| | - Mette H Nicolaisen
- Section for Microbial Ecology and Biotechnology, Department of Plant and Environmental Sciences, University of Copenhagen, Frederiksberg, Denmark
| | - Esteban Martínez-García
- Department of Microbiology, Harvard Medical School, Boston, MA, USA.,Systems Biology Program, National Center of Biotechnology CSIC, Madrid, Spain
| | | | | | - Henrik Calum
- Department of Clinical Microbiology, Hvidovre University Hospital, Copenhagen, Denmark
| | - Marvin Whiteley
- School of Biological Sciences, Georgia Institute of Technology, Emory-Children's Cystic Fibrosis Center, Atlanta, GA, USA
| | - Roberto Kolter
- Department of Microbiology, Harvard Medical School, Boston, MA, USA
| | - Thomas Bjarnsholt
- Costerton Biofilm Center, Department of Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.,Department of Clinical Microbiology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
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19
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Li X, Yuan Y, Jin R, Huang Y, Ma J. High efficiency of excess sludge reduction and dewaterability using newly prepared alkaline ferrate pretreatment combined with anaerobic digestion. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 243:350-357. [PMID: 31103680 DOI: 10.1016/j.jenvman.2019.05.032] [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: 01/28/2019] [Revised: 04/06/2019] [Accepted: 05/06/2019] [Indexed: 05/16/2023]
Abstract
The mechanism of newly prepared alkaline ferrate (NPAF) on the process of sludge aggregates disintegration and combined with anaerobic digestion to enhance the efficiency of reduction and dewaterability of excess sludge was investigated. The results showed that under a NPAF dosage of 70 mg/g total suspended solids (TSS), the extracellular polymeric substances (EPS) structure of the sludge aggregates was disintegrated, and the sludge disintegration degree (DDSCOD) reached 22.5%. The microbial cells in the sludge aggregates were not oxidized, and the direct anaerobic digestion of pretreated sludge could realize the rapid release and degraded of organic matter in the sludge and favor enhancement of the sludge settleability and dewaterability. Compared with the original sludge, the MLVSS of the sludge treated with ferrate pretreatment combined with anaerobic digestion decreased by 40.6%. NPAF exhibited oxidation and flocculation functions rather than phosphorus removal during the pretreatment process. Compare with direct anaerobic digestion of pretreated sludge, inoculation of the raw sludge during anaerobic digestion did not accelerate the release of organic matter, but could effectively enhance the sludge dewaterability and ensure the subsequent treatment of the sludge.
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Affiliation(s)
- Xiang Li
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, China; State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China; National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology, Suzhou, 215009, China.
| | - Yan Yuan
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, China; National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology, Suzhou, 215009, China
| | - Run Jin
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, China; National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology, Suzhou, 215009, China
| | - Yong Huang
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, China; National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology, Suzhou, 215009, China
| | - Jun Ma
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China
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20
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Chandrasekaran K, Selvaraj H, Sundaram M. Electrochemical oxidation with the aerobic pretreatment process for sulfate-rich tannery effluent. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:12194-12204. [PMID: 30834493 DOI: 10.1007/s11356-019-04614-3] [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: 11/28/2018] [Accepted: 02/18/2019] [Indexed: 06/09/2023]
Abstract
The anaerobic feed of tannery effluent was treated using a new invention of an integrated approach: electrochemical oxidation with aerobic pretreatment, which reduces the chemical oxygen demand (COD) and sulfur/sulfide gas formation. Bacterial consortium was used in the present study isolated from a common effluent treatment plant (CETP). Microbial community analysis of anaerobic feed of tannery effluent (AFTE) was done by next generation sequencing. Under aerobic treatment, 79% and 85% of COD reduction were achieved during 3rd and 5th days of the aerobic process. The electrochemical oxidation process was applied for 60 min to reduce the remaining COD using the current density of 20 mA/cm2. Ti-TiO2/IrO2/RuO2-coated mesh and titanium sheet were used as anode and cathode respectively in an electrochemical reactor. A separate electrooxidation experiment was also carried out with galvanostatic mode of constant current density (20 mA/cm2) which enhanced the duration of electrochemical oxidation up to 13 h for complete reduction of COD concentration. UV-Vis and NMR spectroscopy were used to confirm the degradation of organic matter in the tannery effluent during aerobic and electrooxidation processes, where aerobic bacterial degradation is significant. The presence of mixed salt chloride and sulfate was recovered and the elemental composition was confirmed by EDAX analysis.
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Affiliation(s)
- Karthikeyan Chandrasekaran
- Corrosion and Material Protection Division, CSIR-Central Electrochemical Research Institute, Karaikudi, Tamil Nadu, 630006, India.
- Academy of Scientific and Innovative Research (AcSIR), CSIR-Central Electrochemical Research Institute (CECRI), Karaikudi, Tamil Nadu, 630003, India.
| | - Hosimin Selvaraj
- Corrosion and Material Protection Division, CSIR-Central Electrochemical Research Institute, Karaikudi, Tamil Nadu, 630006, India
- Academy of Scientific and Innovative Research (AcSIR), CSIR-Central Electrochemical Research Institute (CECRI), Karaikudi, Tamil Nadu, 630003, India
| | - Maruthamuthu Sundaram
- Corrosion and Material Protection Division, CSIR-Central Electrochemical Research Institute, Karaikudi, Tamil Nadu, 630006, India
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21
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Ge CH, Dong Y, Li H, Li Q, Ni SQ, Gao B, Xu S, Qiao Z, Ding S. Nitritation-anammox process - A realizable and satisfactory way to remove nitrogen from high saline wastewater. BIORESOURCE TECHNOLOGY 2019; 275:86-93. [PMID: 30579105 DOI: 10.1016/j.biortech.2018.12.032] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Revised: 12/08/2018] [Accepted: 12/10/2018] [Indexed: 05/14/2023]
Abstract
In this study, acclimation of freshwater nitritation-anammox sludge to remove nitrogen in high saline and hypersaline wastewater was evaluated, during which the microbes activity and microbial community revolution were revealed to understand the fate of a nitritation-anammox process (SNAP) in response to increasing salt stress. By enhanced aeration, the SNAP system can treat saline (3%) ammonium-rich (185 mg/L) wastewater after gradual adaption. Hypersalinity (5%) caused final deterioration of the SNAP system due to a severe inhibition on anammox activity. Genera Kuenenia (anammox), Nitrosomonas (AOB) and Nitrosovibrio (AOB) bacteria were salt adaptable microbes, while genus Nitrospira (NOB) bacteria were sensitive to salinity. Under the enhanced aeration, AOB bacteria could bear 3% salinity with possible enriched ammonia monooxygenase to stimulate the conversion of ammonium to nitrite by producing more intermediate-hydroxylamine, which could alleviate the negative effect of insufficient hydroxylamine oxidase members in AOB bacteria.
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Affiliation(s)
- Cheng-Hao Ge
- Shenzhen Research Institute of Shandong University, Shenzhen, PR China; School of Environmental Science and Engineering, Shandong University, Qingdao, PR China; Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, PR China
| | - Ying Dong
- Shenzhen Research Institute of Shandong University, Shenzhen, PR China; School of Environmental Science and Engineering, Shandong University, Qingdao, PR China
| | - Hongmin Li
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, PR China; University of Chinese Academy of Sciences, Beijing, PR China
| | - Qianxia Li
- Shenzhen Research Institute of Shandong University, Shenzhen, PR China; School of Environmental Science and Engineering, Shandong University, Qingdao, PR China
| | - Shou-Qing Ni
- Shenzhen Research Institute of Shandong University, Shenzhen, PR China; School of Environmental Science and Engineering, Shandong University, Qingdao, PR China.
| | - Baoyu Gao
- School of Environmental Science and Engineering, Shandong University, Qingdao, PR China
| | - Shiping Xu
- School of Environmental Science and Engineering, Shandong University, Qingdao, PR China
| | - Zhuangming Qiao
- Shandong Meiquan Environmental Protection Technology Co., Ltd., Jinan, PR China
| | - Shaowu Ding
- Shandong Wanhao Fertilizer Co., Ltd., Jinan, PR China
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22
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Ashraf S, Naveed M, Afzal M, Ashraf S, Rehman K, Hussain A, Zahir ZA. Bioremediation of tannery effluent by Cr- and salt-tolerant bacterial strains. ENVIRONMENTAL MONITORING AND ASSESSMENT 2018; 190:716. [PMID: 30421243 DOI: 10.1007/s10661-018-7098-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Accepted: 11/05/2018] [Indexed: 06/09/2023]
Abstract
Microorganisms have great potential to control environmental pollution, particularly industrial sources of water pollution. Currently, leather industry is regarded as the most polluting and suffering from negative impacts due to the pollution it adds to the environment. Chromium, one of the hazardous pollutants discharged from tanneries, is highly toxic and carcinogenic in nature. Effective treatment of tannery effluent is a dire need of the era as a part of environmental management. Among all the wastewater treatment technologies, bioremediation is the most effective and environment-friendly tool to manage the water pollution. The present study evaluated the potential of 11 previously isolated bacterial strains, tolerant to high concentrations of salts and Cr for the bioremediation of tannery effluent. Among all the tested strains, Enterobacter sp. HU38, Microbacterium arborescens HU33, and Pantoea stewartii ASI11 were found most effective in reducing biological oxygen demand (BOD), chemical oxygen demand (COD), total dissolved solids (TDS), total suspended solids (TSS), and chromium (Cr) 70, 63, 57, 87, and 54%, respectively, of tannery effluent and proliferated well under highly toxic conditions, at 9 days of incubation. The pollutant removal efficacy of these bacterial strains can be improved by extending the incubation period or by increasing the amount of inoculum.
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Affiliation(s)
- Sobia Ashraf
- Institute of Soil and Environmental Sciences, University of Agriculture Faisalabad, Faisalabad, 38040, Pakistan
| | - Muhammad Naveed
- Institute of Soil and Environmental Sciences, University of Agriculture Faisalabad, Faisalabad, 38040, Pakistan.
| | - Muhammad Afzal
- National Institute for Biotechnology and Genetic Engineering (NIBGE), Faisalabad, Pakistan
| | - Sana Ashraf
- Institute of Soil and Environmental Sciences, University of Agriculture Faisalabad, Faisalabad, 38040, Pakistan
| | - Khadeeja Rehman
- National Institute for Biotechnology and Genetic Engineering (NIBGE), Faisalabad, Pakistan
| | - Azhar Hussain
- Department of Soil Science, University College of Agriculture and Environmental Sciences, The Islamia University of Bahawalpur, Bahawalpur, 63100, Pakistan
| | - Zahir Ahmad Zahir
- Institute of Soil and Environmental Sciences, University of Agriculture Faisalabad, Faisalabad, 38040, Pakistan
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23
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Zhang L, Zhao T, Shen T, Gao G. Seasonal and spatial variation in the sediment bacterial community and diversity of Lake Bosten, China. J Basic Microbiol 2018; 59:224-233. [PMID: 30417400 DOI: 10.1002/jobm.201800452] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Revised: 10/07/2018] [Accepted: 10/18/2018] [Indexed: 11/08/2022]
Abstract
To explore the influence of seasonal and regional environmental factors on the bacterial community composition (BCC) and diversity in the sediments of Lake Bosten, the 16S rRNA gene of sediment bacteria in four samples from the lake center area and the macrophyte-dominated area were sequenced using 454 pyrosequencing. According to the operational taxonomic units (OTUs), diversity index, relative abundance, and redundancy analysis (RDA) of the bacteria, the results showed that (i) the bacterial diversity of the lake center area was lower than that of the macrophyte-dominated area, and it was higher in winter than that in summer as a whole; (ii) seasonal factors and geographical changes had obvious effects on the abundance of dominant bacteria, including Proteobacteria and Firmicutes; (iii) a large number of unclassified bacteria were detected in this study, and the dominant unclassified genera in both lake areas included unclassified Sva0485, unclassified Anaerolineaceae, and unclassified Nitrospiraceae; and (iv) TN and TOC were the main environmental factors influencing the sediment bacterial community in Lake Bosten, as determined by RDA analysis. The study provides a reference for the in-depth understanding the impact with the change of time and space on sediment microbes in Lake Bosten.
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Affiliation(s)
- Lei Zhang
- School of Biology and Food Engineering, Chuzhou University, Chuzhou, China
| | - Tingting Zhao
- School of Biology and Food Engineering, Chuzhou University, Chuzhou, China
| | - Tingting Shen
- School of Biology and Food Engineering, Chuzhou University, Chuzhou, China
| | - Guang Gao
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, China
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24
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Remonsellez F, Castro-Severyn J, Pardo-Esté C, Aguilar P, Fortt J, Salinas C, Barahona S, León J, Fuentes B, Areche C, Hernández KL, Aguayo D, Saavedra CP. Characterization and Salt Response in Recurrent Halotolerant Exiguobacterium sp. SH31 Isolated From Sediments of Salar de Huasco, Chilean Altiplano. Front Microbiol 2018; 9:2228. [PMID: 30294311 PMCID: PMC6158405 DOI: 10.3389/fmicb.2018.02228] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Accepted: 08/31/2018] [Indexed: 12/22/2022] Open
Abstract
Poly-extremophiles microorganisms have the capacity to inhabit hostile environments and can survive several adverse conditions that include as variations in temperature, pH, and salinity, high levels UV light and atmospheric pressure, and even the presence of toxic compounds and the formation of reactive oxygen species (ROS). A halotolerant Exiguobacterium strain was isolated from Salar de Huasco (Chilean Altiplano), a well-known shallow lake area with variable salinity levels, little human intervention, and extreme environmental conditions, which makes it ideal for the study of resistant mechanisms and the evolution of adaptations. This bacterial genus has not been extensively studied, although its cosmopolitan location indicates that it has high levels of plasticity and adaptive capacity. However, to date, there are no studies regarding the tolerance and resistance to salinity and osmotic pressure. We set out to characterize the Exiguobacterium sp. SH31 strain and describe its phenotypical and genotypical response to osmotic stress. In this context, as a first step to characterize the response to the SH31 strain to salinity and to establish the bases for a molecular study, we proposed to compare its response under three salt conditions (0, 25, and 50 g/l NaCl). Using different physiology, genomic, and transcriptomic approaches, we determined that the bacterium is able to grow properly in a NaCl concentration of up to 50 g/l; however, the best growth rate was observed at 25 g/l. Although the presence of flagella is not affected by salinity, motility was diminished at 25 g/l NaCl and abolished at 50 g/l. Biofilm formation was induced proportionally with increases in salinity, which was expected. These phenotypic results correlated with the expression of related genes: fliG and fliS Motility); opuBA and putP (transport); glnA, proC, gltA, and gbsA (compatible solutes); ywqC, bdlA, luxS y pgaC (biofilm and stress response); and therefore, we conclude that this strain effectively modifies gene expression and physiology in a differential manner when faced with different concentrations of NaCl and these modifications aid survival.
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Affiliation(s)
- Francisco Remonsellez
- Departamento de Ingeniería Química, Facultad de Ingeniería y Ciencias Geológicas, Universidad Católica del Norte, Antofagasta, Chile
- Centro de Investigación Tecnológica del Agua en el Desierto (CEITSAZA), Universidad Católica del Norte, Antofagasta, Chile
| | - Juan Castro-Severyn
- Laboratorio de Microbiología Molecular, Departamento de Ciencias Biológicas, Facultad de Ciencias de la Vida, Universidad Andrés Bello, Santiago, Chile
| | - Coral Pardo-Esté
- Laboratorio de Microbiología Molecular, Departamento de Ciencias Biológicas, Facultad de Ciencias de la Vida, Universidad Andrés Bello, Santiago, Chile
| | - Pablo Aguilar
- Lake and Glacier Ecology Research Group, Institute of Ecology, University of Innsbruck, Innsbruck, Austria
| | - Jonathan Fortt
- Departamento de Ingeniería Química, Facultad de Ingeniería y Ciencias Geológicas, Universidad Católica del Norte, Antofagasta, Chile
| | - Cesar Salinas
- Laboratorio de Microbiología Molecular, Departamento de Ciencias Biológicas, Facultad de Ciencias de la Vida, Universidad Andrés Bello, Santiago, Chile
| | - Sergio Barahona
- Departamento de Ingeniería Química, Facultad de Ingeniería y Ciencias Geológicas, Universidad Católica del Norte, Antofagasta, Chile
| | - Joice León
- Departamento de Ingeniería Química, Facultad de Ingeniería y Ciencias Geológicas, Universidad Católica del Norte, Antofagasta, Chile
| | - Bárbara Fuentes
- Departamento de Ingeniería Química, Facultad de Ingeniería y Ciencias Geológicas, Universidad Católica del Norte, Antofagasta, Chile
| | - Carlos Areche
- Departamento de Química, Facultad de Ciencias, Universidad de Chile, Santiago, Chile
| | - Klaudia L. Hernández
- Centro de Investigación Marina Quintay, Facultad de Ciencias de la Vida, Universidad Andrés Bello, Santiago, Chile
- Instituto de Ciencias Marinas y Limnológicas, Universidad Austral de Chile, Valdivia, Chile
| | - Daniel Aguayo
- Center for Bioinformatics and Integrative Biology, Departamento de Ciencias Biológicas, Facultad de Ciencias de la Vida, Universidad Andrés Bello, Santiago, Chile
| | - Claudia P. Saavedra
- Laboratorio de Microbiología Molecular, Departamento de Ciencias Biológicas, Facultad de Ciencias de la Vida, Universidad Andrés Bello, Santiago, Chile
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25
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Pretscher M, Pineda-Contreras BA, Kaiser P, Reich S, Schöbel J, Kuttner C, Freitag R, Fery A, Schmalz H, Agarwal S. pH-Responsive Biohybrid Carrier Material for Phenol Decontamination in Wastewater. Biomacromolecules 2018; 19:3224-3232. [PMID: 29940118 DOI: 10.1021/acs.biomac.8b00361] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Smart polymers are a valuable platform to protect and control the activity of biological agents over a wide range of conditions, such as low pH, by proper encapsulation. Such conditions are present in olive oil mill wastewater with phenol as one of the most problematic constituents. We show that elastic and pH-responsive diblock copolymer fibers are a suitable carrier for Corynebacterium glutamicum, i.e., bacteria which are known for their ability to degrade phenol. Free C. glutamicum does not survive low pH conditions and fails to degrade phenol at low pH conditions. Our tea-bag like biohybrid system, where the pH-responsive diblock copolymer acts as a protecting outer shell for the embedded bacteria, allows phenol degradation even at low pH. Utilizing a two-step encapsulation process, planktonic cells were first encapsulated in poly(vinyl alcohol) to protect the bacteria against the organic solvents used in the second step employing coaxial electrospinning.
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Affiliation(s)
- Martin Pretscher
- Macromolecular Chemistry II , University of Bayreuth , Universitätsstraße 30 , 95440 , Bayreuth , Germany
| | - Beatriz A Pineda-Contreras
- Macromolecular Chemistry II , University of Bayreuth , Universitätsstraße 30 , 95440 , Bayreuth , Germany
| | - Patrick Kaiser
- Process Biotechnology , University of Bayreuth , Universitätsstraße 30 , 95440 Bayreuth , Germany
| | - Steffen Reich
- Macromolecular Chemistry II , University of Bayreuth , Universitätsstraße 30 , 95440 , Bayreuth , Germany
| | - Judith Schöbel
- Macromolecular Chemistry II , University of Bayreuth , Universitätsstraße 30 , 95440 , Bayreuth , Germany
| | - Christian Kuttner
- Leibniz Institute of Polymer Research Dresden , Institute of Physical Chemistry and Polymer Physics , Hohe Straße 6 , 01069 Dresden , Germany.,BioNanoPlasmonics Laboratory, CIC biomaGUNE , Paseo de Miramoń 182 , 20014 Donostia-San Sebastiań , Spain
| | - Ruth Freitag
- Process Biotechnology , University of Bayreuth , Universitätsstraße 30 , 95440 Bayreuth , Germany
| | - Andreas Fery
- Leibniz Institute of Polymer Research Dresden , Institute of Physical Chemistry and Polymer Physics , Hohe Straße 6 , 01069 Dresden , Germany
| | - Holger Schmalz
- Macromolecular Chemistry II , University of Bayreuth , Universitätsstraße 30 , 95440 , Bayreuth , Germany.,Bavarian Polymer Institute , University of Bayreuth , Universitätsstraße 30 , 95440 , Bayreuth , Germany
| | - Seema Agarwal
- Macromolecular Chemistry II , University of Bayreuth , Universitätsstraße 30 , 95440 , Bayreuth , Germany.,Bayreuth Center for Colloids and Interfaces , University of Bayreuth , Universitätsstraße 30 , 95440 , Bayreuth , Germany
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26
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Luque Di Salvo J, Cosenza A, Tamburini A, Micale G, Cipollina A. Long-run operation of a reverse electrodialysis system fed with wastewaters. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2018; 217:871-887. [PMID: 29660712 DOI: 10.1016/j.jenvman.2018.03.110] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2017] [Revised: 03/13/2018] [Accepted: 03/25/2018] [Indexed: 06/08/2023]
Abstract
The performance of a Reverse ElectroDialysis (RED) system fed by unconventional wastewater solutions for long operational periods is analysed for the first time. The experimental campaign was divided in a series of five independent long-runs which combined real wastewater solutions with artificial solutions for at least 10 days. The time evolution of electrical variables, gross power output and net power output, considering also pumping losses, was monitored: power density values obtained during the long-runs are comparable to those found in literature with artificial feed solutions of similar salinity. The increase in pressure drops and the development of membrane fouling were the main detrimental factors of system performance. Pressure drops increase was related to the physical obstruction of the feed channels defined by the spacers, while membrane fouling was related to the adsorption of foulants over the membrane surfaces. In order to manage channels partial clogging and fouling, different kinds of easily implemented in situ backwashings (i.e. neutral, acid, alkaline) were adopted, without the need for an abrupt interruption of the RED unit operation. The application of periodic ElectroDialysis (ED) pulses is also tested as fouling prevention strategy. The results collected suggest that RED can be used to produce electric power by unworthy wastewaters, but additional studies are still needed to characterize better membrane fouling and further improve system performance with these solutions.
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Affiliation(s)
- Javier Luque Di Salvo
- Dipartimento dell'Innovazione Industriale e Digitale - Ingegneria Chimica, Gestionale, Informatica, Meccanica (DIID), Università di Palermo (UNIPA) - viale delle Scienze Ed.6, 90128 Palermo, Italy
| | - Alessandro Cosenza
- Dipartimento dell'Innovazione Industriale e Digitale - Ingegneria Chimica, Gestionale, Informatica, Meccanica (DIID), Università di Palermo (UNIPA) - viale delle Scienze Ed.6, 90128 Palermo, Italy
| | - Alessandro Tamburini
- Dipartimento dell'Innovazione Industriale e Digitale - Ingegneria Chimica, Gestionale, Informatica, Meccanica (DIID), Università di Palermo (UNIPA) - viale delle Scienze Ed.6, 90128 Palermo, Italy.
| | - Giorgio Micale
- Dipartimento dell'Innovazione Industriale e Digitale - Ingegneria Chimica, Gestionale, Informatica, Meccanica (DIID), Università di Palermo (UNIPA) - viale delle Scienze Ed.6, 90128 Palermo, Italy
| | - Andrea Cipollina
- Dipartimento dell'Innovazione Industriale e Digitale - Ingegneria Chimica, Gestionale, Informatica, Meccanica (DIID), Università di Palermo (UNIPA) - viale delle Scienze Ed.6, 90128 Palermo, Italy
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27
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Church J, Hwang JH, Kim KT, McLean R, Oh YK, Nam B, Joo JC, Lee WH. Effect of salt type and concentration on the growth and lipid content of Chlorella vulgaris in synthetic saline wastewater for biofuel production. BIORESOURCE TECHNOLOGY 2017. [PMID: 28651134 DOI: 10.1016/j.biortech.2017.06.081] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Microalgae can offer several benefits for wastewater treatment with their ability to produce large amounts of lipids for biofuel production and the high economic value of harvested biomass for biogas and fertilizer. This study found that salt concentration (∼45gL-1) had more of an effect than salt type on metabolisms of Chlorella vulgaris for wastewater treatment and biofuel production. Salinity stress decreased the algal growth rate in wastewater by 0.003day-1permScm-1 and slightly reduced nutrient removal rates. However, salinity stress was shown to increase total lipid content from 11.5% to 16.1% while also increasing the saturated portions of fatty acids in C. vulgaris. In addition, salinity increased the algal settling rate from 0.06 to 0.11mday-1 which could potentially reduce the cost of harvesting for algal biofuel production. Overall, C. vulgaris makes a suitable candidate for high salinity wastewater cultivation and biofuel production.
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Affiliation(s)
- Jared Church
- Department of Civil, Environmental, and Construction Engineering, University of Central Florida, Orlando, FL 32816, USA
| | - Jae-Hoon Hwang
- Department of Civil, Environmental, and Construction Engineering, University of Central Florida, Orlando, FL 32816, USA
| | - Keug-Tae Kim
- Department of Biotechnology, University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Rebecca McLean
- Department of Civil, Environmental, and Construction Engineering, University of Central Florida, Orlando, FL 32816, USA
| | - You-Kwan Oh
- Biomass and Waste Energy Laboratory, Korea Institute of Energy Research (KIER), 152 Gajeong-ro, Yuseong-gu, Daejeon 34129, South Korea
| | - Bora Nam
- Biomass and Waste Energy Laboratory, Korea Institute of Energy Research (KIER), 152 Gajeong-ro, Yuseong-gu, Daejeon 34129, South Korea
| | - Jin Chul Joo
- Department of Civil and Environmental Engineering, Hanbat National University, 125 Dongsuh-Blvd, Yuseong-gu, Daejeon 34158, South Korea
| | - Woo Hyoung Lee
- Department of Civil, Environmental, and Construction Engineering, University of Central Florida, Orlando, FL 32816, USA.
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Mirbolooki H, Amirnezhad R, Pendashteh AR. Treatment of high saline textile wastewater by activated sludge microorganisms. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.jart.2017.01.012] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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29
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Ricci A, Allende A, Bolton D, Chemaly M, Davies R, Girones R, Herman L, Koutsoumanis K, Lindqvist R, Nørrung B, Robertson L, Ru G, Sanaa M, Simmons M, Skandamis P, Snary E, Speybroeck N, Ter Kuile B, Threlfall J, Wahlström H, Cocconcelli PS, Klein G, Prieto Maradona M, Querol A, Peixe L, Suarez JE, Sundh I, Vlak JM, Aguilera-Gómez M, Barizzone F, Brozzi R, Correia S, Heng L, Istace F, Lythgo C, Fernández Escámez PS. Scientific Opinion on the update of the list of QPS-recommended biological agents intentionally added to food or feed as notified to EFSA. EFSA J 2017; 15:e04664. [PMID: 32625421 PMCID: PMC7010101 DOI: 10.2903/j.efsa.2017.4664] [Citation(s) in RCA: 88] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
EFSA is requested to assess the safety of a broad range of biological agents in the context of notification for market authorisation as sources of food and feed additives, food enzymes and plant protection products. The qualified presumption of safety (QPS) assessment was developed to provide a harmonised generic pre-assessment to support safety risk assessments performed by EFSA's scientific Panels. The safety of unambiguously defined biological agents (at the highest taxonomic unit appropriate for the purpose for which an application is intended), and the completeness of the body of knowledge are assessed. Identified safety concerns for a taxonomic unit are, where possible and reasonable in number, reflected as 'qualifications' in connection with a recommendation for a QPS status. The list of QPS recommended biological agents was reviewed and updated in the current opinion and therefore becomes the valid list. The 2016 update reviews previously assessed microorganisms including bacteria, yeasts and viruses used for plant protection purposes following an Extensive Literature Search strategy. The taxonomic units related to the new notifications received since the 2013 QPS opinion, were periodically evaluated for a QPS status and the results published as Statements of the BIOHAZ Panel. Carnobacterium divergens, Lactobacillus diolivorans, Microbacterium imperiale, Pasteuria nishizawae, Pediococcus parvulus, Bacillus flexus, Bacillus smithii, Xanthomonas campestris and Candida cylindracea were recommended for the QPS list. All taxonomic units previously recommended for the 2013 QPS list had their status reconfirmed as well their qualifications with the exception of Pasteuria nishizawae for which the qualification was removed. The exclusion of filamentous fungi and enterococci from the QPS evaluations was reconsidered but monitoring will be maintained and the status will be re-evaluated in the next QPS Opinion update. Evaluation of bacteriophages should remain as a case-by-case procedure and should not be considered for QPS status.
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30
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Saxena G, Chandra R, Bharagava RN. Environmental Pollution, Toxicity Profile and Treatment Approaches for Tannery Wastewater and Its Chemical Pollutants. REVIEWS OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2017; 240:31-69. [PMID: 26795766 DOI: 10.1007/398_2015_5009] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Leather industries are key contributors in the economy of many developing countries, but unfortunately they are facing serious challenges from the public and governments due to the associated environmental pollution. There is a public outcry against the industry due to the discharge of potentially toxic wastewater having alkaline pH, dark brown colour, unpleasant odour, high biological and chemical oxygen demand, total dissolved solids and a mixture of organic and inorganic pollutants. Various environment protection agencies have prioritized several chemicals as hazardous and restricted their use in leather processing however; many of these chemicals are used and discharged in wastewater. Therefore, it is imperative to adequately treat/detoxify the tannery wastewater for environmental safety. This paper provides a detail review on the environmental pollution and toxicity profile of tannery wastewater and chemicals. Furthermore, the status and advances in the existing treatment approaches used for the treatment and/or detoxification of tannery wastewater at both laboratory and pilot/industrial scale have been reviewed. In addition, the emerging treatment approaches alone or in combination with biological treatment approaches have also been considered. Moreover, the limitations of existing and emerging treatment approaches have been summarized and potential areas for further investigations have been discussed. In addition, the clean technologies for waste minimization, control and management are also discussed. Finally, the international legislation scenario on discharge limits for tannery wastewater and chemicals has also been discussed country wise with discharge standards for pollution prevention due to tannery wastewater.
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Affiliation(s)
- Gaurav Saxena
- Laboratory for Bioremediation and Metagenomic Research (LBMR), Department of Environmental Microbiology (DEM), School for Environmental Sciences (SES), Babasaheb Bhimrao Ambedkar University (A Central University), Vidya Vihar, Raebareli Road, Lucknow, 226 025, Uttar Pradesh, India
| | - Ram Chandra
- Environmental Microbiology Section, Environmental Toxicology Group, Council of Scientific and Industrial Research (CSIR), Indian Institute of Toxicology Research (IITR), 80, M.G. Marg, Lucknow, 226 001, Uttar Pradesh, India
| | - Ram Naresh Bharagava
- Laboratory for Bioremediation and Metagenomic Research (LBMR), Department of Environmental Microbiology (DEM), School for Environmental Sciences (SES), Babasaheb Bhimrao Ambedkar University (A Central University), Vidya Vihar, Raebareli Road, Lucknow, 226 025, Uttar Pradesh, India.
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31
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Gutiérrez-Arnillas E, Rodríguez A, Sanromán M, Deive F. New sources of halophilic lipases: Isolation of bacteria from Spanish and Turkish saltworks. Biochem Eng J 2016. [DOI: 10.1016/j.bej.2016.01.015] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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32
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Cui YW, Zhang HY, Ding JR, Peng YZ. The effects of salinity on nitrification using halophilic nitrifiers in a Sequencing Batch Reactor treating hypersaline wastewater. Sci Rep 2016; 6:24825. [PMID: 27109617 PMCID: PMC4843016 DOI: 10.1038/srep24825] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2016] [Accepted: 04/05/2016] [Indexed: 11/16/2022] Open
Abstract
With annual increases in the generation and use of saline wastewater, the need to avoid environmental problems such as eutrophication is critical. A previous study identified ways to start up a halophilic sludge domesticated from estuarine sediments to remove nitrogen from wastewater with a salinity of 30 g/L. This investigation expands that work to explore the impact of salinity on nitrogen removal. This study demonstrated that the mixed halophilic consortia removed nitrogen from wastewater with a salinity of 30–85 g/L. A kinetic analysis showed that halophilic nitrifiers selected based on hypersalinity were characterized by low Ks, μmax and specific ammonium oxidization rates. This explains the decrease in ammonium removal efficiency in the high salinity operational phases. Salinity inhibited ammonia oxidizing bacteria (AOB) activity, as well as the number of dominant AOB, but did not significantly affect the AOB dominant species. Three most dominant AOB lineages in the halophilic sludge were Nitrosomonas marina, Nitrosomonas europaea, and Nitrosococcus mobilis. Nitrosomonas europaea and Nitrosococcus mobilis were mainly affected by salinity, while nitrite accumulation and ammonia loading played the key role in determining the abundance of Nitrosococcus mobilis and Nitrosococcus europaea. The study contributes insights about shifts in halophilic nitrifying bacterial populations.
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Affiliation(s)
- You-Wei Cui
- Beijing University of Technology, College of Energy and Environmental Engineering, 100 Pingleyuan, Chaoyang District, Beijing 100124, China
| | - Hong-Yu Zhang
- Beijing University of Technology, College of Energy and Environmental Engineering, 100 Pingleyuan, Chaoyang District, Beijing 100124, China
| | - Jie-Ran Ding
- Beijing University of Technology, College of Energy and Environmental Engineering, 100 Pingleyuan, Chaoyang District, Beijing 100124, China.,Environmental Management College of China, 8 Road of Jingang, Beidaihe District, Qinhuangdao 066102, China
| | - Yong-Zhen Peng
- Beijing University of Technology, College of Energy and Environmental Engineering, 100 Pingleyuan, Chaoyang District, Beijing 100124, China
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Bhattacharya P, Swarnakar S, Mukhopadhyay A, Ghosh S. Exposure of composite tannery effluent on snail, Pila globosa: A comparative assessment of toxic impacts of the untreated and membrane treated effluents. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2016; 126:45-55. [PMID: 26720808 DOI: 10.1016/j.ecoenv.2015.12.021] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Revised: 12/14/2015] [Accepted: 12/15/2015] [Indexed: 06/05/2023]
Abstract
Effluent from tannery industries can significantly affect the aquatic environment due to the presence of a variety of recalcitrant components. The present study focuses on a comparative assessment of the toxic impacts of an untreated tannery effluent and membrane treated effluents using snail, Pila globosa as an aquatic model. Composite tannery effluent collected from a common effluent treatment plant was selected as the untreated effluent. To investigate the effect of treated effluents on the aquatic organism the effluent was treated by two ways, viz. a single stage microfiltration (MF) using ceramic membrane and a two-step process involving MF followed by reverse osmosis (RO). The whole body tissue, gonad and mantle of P. globosa were subjected to enzyme assays like superoxide dismutase (SOD), catalase (CAT), glutathione reductase (GR), glutathione peroxidase (GSH-GPx), glutathione S- transferase (GST), etc. for assessing toxic impact. Changes in the biochemical parameters like protein, carbohydrate and amino acid were observed including histological studies of gonad and mantle tissue upon treatment with tannery effluents. To examine potential DNA damage due to the exposure of the effluent, comet assay was conducted. The study revealed that with an exposure to the untreated effluent, activity of the antioxidant enzymes increased significantly while the protein and carbohydrate content reduced largely in the whole body tissue, gonad as well as mantle tissues of P. globosa. Histological study indicated considerable damage in the gonad and mantle tissues following exposure to the untreated effluent. Comet assay using hemolymph of P. globosa following exposure to tannery effluent, showed significant genotoxicity. Interestingly, compared to the untreated effluent, damaging effect was reduced in molluscs tissues when exposed to MF treated effluent and even lesser when exposed to MF+RO treated effluent. Apart from the reduced activities of oxidative stress enzymes, the protein, amino acid and carbohydrate content of molluscs exposed to both of the treated effluent were found close to that of control. Comet assay revealed no damage in the DNA for MF and MF+RO treated effluent indicating that the membrane based treatment procedure restores environmental condition to control level.
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Affiliation(s)
- Priyankari Bhattacharya
- Ceramic Membrane Division, CSIR-Central Glass and Ceramic Research Institute, Kolkata 700032, India
| | - Snehasikta Swarnakar
- Drug Development Diagnostics & Biotechnology Division, CSIR-Indian Institute of Chemical Biology, Kolkata 700 032, India
| | - Aniruddha Mukhopadhyay
- Department of Environmental Science, University of Calcutta, 35 Ballygunge Circular Road, Kolkata 700 019, India
| | - Sourja Ghosh
- Ceramic Membrane Division, CSIR-Central Glass and Ceramic Research Institute, Kolkata 700032, India.
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34
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Huang G, Fan G, Liu G. Enhanced treatment of tannery wastewater in an integrated multistage bioreactor (IMBR) by the predominant bacterial strains enriched from marine sediments. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2016; 73:807-817. [PMID: 26901723 DOI: 10.2166/wst.2015.548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
An innovative integrated multistage bioreactor (IMBR) system, which was augmented with three predominant bacterial strains (Lactobacillus paracasei CL1107, Pichia jadinii CL1705, and Serratia marcescens CL1502) isolated from marine sediments, was developed to treat real tannery wastewater without performing physicochemical pretreatment, with the potential to reduce the generation of waste sludge and odors. The performance of the IMBR treatment system, with and without the inclusion of the predominant bacterial strains, was compared. The results indicated that the performance of the IMBR system without bioaugmentation by the predominant bacterial strains was poor. However, when in the presence of the predominant bacterial strains, the IMBR system exhibited high removal efficiencies of chemical oxygen demand (COD) (97%), NH4(+)-N (97.7%), and total nitrogen (TN) (90%). In addition, the system had the capacity for the simultaneous removal of organics and nitrogen, heterotrophic nitrification and denitrification being carried out concurrently, thereby avoiding the strong inhibition of high concentrations of COD on nitrification. The system possessed excellent adaptability and ability to resist influent loading fluctuations, and had a good alkalinity balance such that it could achieve a high NH4(+)-N, and TN removal efficiency without a supplement of external alkalinity. In addition, an empirical performance modeling of the IMBR system was analyzed.
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Affiliation(s)
- Guangdao Huang
- School of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Xinxiang, Henan 453007, China E-mail: ; Environmental Protection & Design institute, Huaqiao University, Quanzhou, Fujian 362021, China
| | - Guofeng Fan
- Environmental Protection & Design institute, Huaqiao University, Quanzhou, Fujian 362021, China
| | - Guoguang Liu
- School of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Xinxiang, Henan 453007, China E-mail:
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Rajeswari S, Vidhya S, Sundarapandiyan S, Saravanan P, Ponmariappan S, Vidya K. Improvement in treatment of soak liquor by combining electro-oxidation and biodegradation. RSC Adv 2016. [DOI: 10.1039/c5ra28076a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A combined process involving electro-oxidation and biodegradation by halophilic bacteria was applied to treat wastewater effectively for discharge.
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Affiliation(s)
- S. Rajeswari
- Microbial Corrosion and Bio-Environmental Engineering
- CSIR-Central Electrochemical Research Institute
- Karaikudi 630 003
- India
| | - S. Vidhya
- Microbial Corrosion and Bio-Environmental Engineering
- CSIR-Central Electrochemical Research Institute
- Karaikudi 630 003
- India
| | | | - P. Saravanan
- CSIR-Central Leather Research Institute
- Chennai 600 020
- India
| | - S. Ponmariappan
- Defence Research and Development Organisation
- Gwalior 474 002
- India
| | - K. Vidya
- University College of Engineering (BIT Campus)
- Thiruchirapalli 620 024
- India
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Poly[(R)-3-hydroxybutyrate] production under different salinity conditions by a novel Bacillus megaterium strain. N Biotechnol 2016; 33:73-7. [DOI: 10.1016/j.nbt.2015.08.006] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2015] [Revised: 08/31/2015] [Accepted: 08/31/2015] [Indexed: 11/24/2022]
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Lobova TI, Yemelyanova E, Andreeva IS, Puchkova LI, Repin VY. Antimicrobial Resistance and Plasmid Profile of Bacterial Strains Isolated from the Urbanized Eltsovka-1 River (Russia). Microb Drug Resist 2015; 21:477-90. [DOI: 10.1089/mdr.2014.0203] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Tatiana I. Lobova
- Krasnoyarsk Scientific Centre of Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk, Russia
| | - Elena Yemelyanova
- Novosibirsk State Medical University, Novosibirsk, Russia
- State Research Center of Virology and Biotechnology VECTOR of the Federal Service for Surveillance in Consumer Rights Protection and Human Well-Being, Novosibirsk, Russia
| | - Irina S. Andreeva
- State Research Center of Virology and Biotechnology VECTOR of the Federal Service for Surveillance in Consumer Rights Protection and Human Well-Being, Novosibirsk, Russia
| | - Larisa I. Puchkova
- State Research Center of Virology and Biotechnology VECTOR of the Federal Service for Surveillance in Consumer Rights Protection and Human Well-Being, Novosibirsk, Russia
| | - Vladimir Ye Repin
- State Research Center of Virology and Biotechnology VECTOR of the Federal Service for Surveillance in Consumer Rights Protection and Human Well-Being, Novosibirsk, Russia
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Xia S, Zhou L, Zhang Z, Hermanowicz SW. Removal mechanism of low-concentration Cr (VI) in a submerged membrane bioreactor activated sludge system. Appl Microbiol Biotechnol 2015; 99:5351-60. [DOI: 10.1007/s00253-015-6590-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2015] [Revised: 03/23/2015] [Accepted: 03/25/2015] [Indexed: 01/16/2023]
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Desta AF, Assefa F, Leta S, Stomeo F, Wamalwa M, Njahira M, Appolinaire D. Microbial community structure and diversity in an integrated system of anaerobic-aerobic reactors and a constructed wetland for the treatment of tannery wastewater in Modjo, Ethiopia. PLoS One 2014; 9:e115576. [PMID: 25541981 PMCID: PMC4277355 DOI: 10.1371/journal.pone.0115576] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2014] [Accepted: 11/29/2014] [Indexed: 11/18/2022] Open
Abstract
A culture-independent approach was used to elucidate the microbial diversity and structure in the anaerobic-aerobic reactors integrated with a constructed wetland for the treatment of tannery wastewater in Modjo town, Ethiopia. The system has been running with removal efficiencies ranging from 94%-96% for COD, 91%-100% for SO4(2-) and S(2-), 92%-94% for BOD, 56%-82% for total Nitrogen and 2%-90% for NH3-N. 16S rRNA gene clone libraries were constructed and microbial community assemblies were determined by analysis of a total of 801 unique clone sequences from all the sites. Operational Taxonomic Unit (OTU)--based analysis of the sequences revealed highly diverse communities in each of the reactors and the constructed wetland. A total of 32 phylotypes were identified with the dominant members affiliated to Clostridia (33%), Betaproteobacteria (10%), Bacteroidia (10%), Deltaproteobacteria (9%) and Gammaproteobacteria (6%). Sequences affiliated to the class Clostridia were the most abundant across all sites. The 801 sequences were assigned to 255 OTUs, of which 3 OTUs were shared among the clone libraries from all sites. The shared OTUs comprised 80 sequences belonging to Clostridiales Family XIII Incertae Sedis, Bacteroidetes and unclassified bacterial group. Significantly different communities were harbored by the anaerobic, aerobic and rhizosphere sites of the constructed wetland. Numerous representative genera of the dominant bacterial classes obtained from the different sample sites of the integrated system have been implicated in the removal of various carbon- containing pollutants of natural and synthetic origins. To our knowledge, this is the first report of microbial community structure in tannery wastewater treatment plant from Ethiopia.
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Affiliation(s)
- Adey Feleke Desta
- Institute of Biotechnology, Addis Ababa University, Addis Ababa, Ethiopia
| | - Fassil Assefa
- Institute of Biotechnology, Addis Ababa University, Addis Ababa, Ethiopia
| | - Seyoum Leta
- Centre for Environmental Science, College of Natural Sciences, Addis Ababa University, Addis Ababa, Ethiopia
| | - Francesca Stomeo
- Biosciences eastern and central Africa- International Livestock Research Institute (BecA-ILRI) Hub, Nairobi, Kenya
| | - Mark Wamalwa
- Biosciences eastern and central Africa- International Livestock Research Institute (BecA-ILRI) Hub, Nairobi, Kenya
| | - Moses Njahira
- Biosciences eastern and central Africa- International Livestock Research Institute (BecA-ILRI) Hub, Nairobi, Kenya
| | - Djikeng Appolinaire
- Biosciences eastern and central Africa- International Livestock Research Institute (BecA-ILRI) Hub, Nairobi, Kenya
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40
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Saba B. Potential Treatment Options for Hydraulic Fracturing Return Fluids: A Review. CHEMBIOENG REVIEWS 2014. [DOI: 10.1002/cben.201400003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Jadeja NB, More RP, Purohit HJ, Kapley A. Metagenomic analysis of oxygenases from activated sludge. BIORESOURCE TECHNOLOGY 2014; 165:250-256. [PMID: 24631150 DOI: 10.1016/j.biortech.2014.02.045] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Revised: 02/13/2014] [Accepted: 02/15/2014] [Indexed: 06/03/2023]
Abstract
Oxygenases play a key role in degradation of the aromatic compounds in the wastewater. This study explores the oxygenase coding gene sequences from the metagenome of activated biomass. Based on these results, the catabolic capacity of the activated sludge was assessed towards degradation of naphthalene, anthracene, phenol, biphenyl and o-toluidine. Oxygenases found in this study were compared with oxygenases from three other metagenome datasets. Results demonstrate that despite different geographical locations and source, many genes coding for oxygenases were common between treatment plants. 1, 2 Homogentisate dioxygenase and phenylacetate CoA oxygenases were present in all four metagenomes. Metagenomics provides a vast amount of data that needs to be mined with specific targets to harness the potential of the microbial world.
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Affiliation(s)
- Niti B Jadeja
- Environmental Genomics Division, National Environmental Engineering Research Institute, (CSIR-NEERI), Nehru Marg, Nagpur 440 020, India
| | - Ravi P More
- Environmental Genomics Division, National Environmental Engineering Research Institute, (CSIR-NEERI), Nehru Marg, Nagpur 440 020, India
| | - Hemant J Purohit
- Environmental Genomics Division, National Environmental Engineering Research Institute, (CSIR-NEERI), Nehru Marg, Nagpur 440 020, India
| | - Atya Kapley
- Environmental Genomics Division, National Environmental Engineering Research Institute, (CSIR-NEERI), Nehru Marg, Nagpur 440 020, India.
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Paisio CE, Quevedo MR, Talano MA, González PS, Agostini E. Application of two bacterial strains for wastewater bioremediation and assessment of phenolics biodegradation. ENVIRONMENTAL TECHNOLOGY 2014; 35:1802-1810. [PMID: 24956773 DOI: 10.1080/09593330.2014.882994] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The use of native bacteria is a useful strategy to decontaminate industrial effluents. In this work, two bacterial strains isolated from polluted environments constitutes a promising alternative since they were able to remove several phenolic compounds not only from synthetic solutions but also from effluents derived from a chemical industry and a tannery which are complex matrices. Acinetobacter sp. RTE 1.4 showed ability to completely remove 2-methoxyphenol (1000 mg/L) while Rhodococcus sp. CS 1 not only degrade the same concentration of this compound but also removed 4- chlorophenol, 2,4-dichlorophenol and pentachlorophenol with high efficiency. Moreover, both bacteria degraded phenols naturally present or even exogenously added at high concentrations in effluents from the chemical industry and a tannery in short time (up to 5 d). In addition, a significant reduction of biological oxygen demand and chemical oxygen demand values was achieved after 7 d of treatment for both effluents using Acinetobacter sp. RTE 1.4 and Rhodococcus sp. CS1, respectively. These results showed that Acinetobacter sp. RTE1.4 and Rhodococcus sp. CS 1 might be considered as useful biotechnological tools for an efficient treatment of different effluents, since they showed wide versatility to detoxify these complex matrices, even supplemented with high phenol concentrations.
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Lofrano G, Meriç S, Zengin GE, Orhon D. Chemical and biological treatment technologies for leather tannery chemicals and wastewaters: a review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2013; 461-462:265-281. [PMID: 23735721 DOI: 10.1016/j.scitotenv.2013.05.004] [Citation(s) in RCA: 184] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2013] [Revised: 05/01/2013] [Accepted: 05/02/2013] [Indexed: 06/02/2023]
Abstract
Although the leather tanning industry is known to be one of the leading economic sectors in many countries, there has been an increasing environmental concern regarding the release of various recalcitrant pollutants in tannery wastewater. It has been shown that biological processes are presently known as the most environmental friendly but inefficient for removal of recalcitrant organics and micro-pollutants in tannery wastewater. Hence emerging technologies such as advanced oxidation processes and membrane processes have been attempted as integrative to biological treatment for this sense. This paper, as the-state-of-the-art, attempts to revise the over world trends of treatment technologies and advances for pollution prevention from tannery chemicals and wastewater. It can be elucidated that according to less extent advances in wastewater minimization as well as in leather production technology and chemicals substitution, biological and chemical treatment processes have been progressively studied. However, there has not been a full scale application yet of those emerging technologies using advanced oxidation although some of them proved good achievements to remove xenobiotics present in tannery wastewater. It can be noted that advanced oxidation technologies integrated with biological processes will remain in the agenda of the decision makers and water sector to apply the best prevention solution for the future tanneries.
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Affiliation(s)
- Giusy Lofrano
- Department of Environment, Waste Division, Salerno Province, via Mauri, 61-84132 Salerno, Italy.
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Perrodin Y, Volatier L, Bazin C, Boisson JC. Assessment of ecological risks linked to the discharge of saline industrial effluent into a river. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2013; 20:1450-1460. [PMID: 22684878 DOI: 10.1007/s11356-012-1014-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2012] [Accepted: 05/25/2012] [Indexed: 06/01/2023]
Abstract
Discharges of saline effluents into rivers can lead to risks for local aquatic ecosystems. A specific ecological risk assessment methodology has been developed to propose a management tool to organisations responsible for managing rivers and industrial companies producing saline effluents. This methodology involves the detailed description of the spatiotemporal system concerned, the choice of ecological targets to be preserved, and the performance of bioassays adapted to each of the compartments of the river. Following development, it was applied to an industrial effluent in eastern France. For the scenario studied, results obtained suggest a high risk for the organisms of the water column and a low risk for the organisms of the periphyton. This difference can be explained by the structure of the latter which integrate extracellular polymers secreted by the organisms of the biofilm, forming a gel with a porous structure that acts as a barrier to diffusion. The methodology formulated permitted identifying the critical points of the spatiotemporal system studied and then using them as the basis for making well-grounded proposals for management. Lastly, proposals to improve the methodology itself are made, especially concerning the integration of the sediment compartment in the version formulated initially.
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Affiliation(s)
- Yves Perrodin
- Université de Lyon, ENTPE; UMR CNRS 5023 LEHNA; 2, rue Maurice Audin, 69518, Vaulx-en-Velin, France.
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Fall C, Millán-Lagunas E, Bâ KM, Gallego-Alarcón I, García-Pulido D, Díaz-Delgado C, Solís-Morelos C. COD fractionation and biological treatability of mixed industrial wastewaters. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2012; 113:71-77. [PMID: 22996003 DOI: 10.1016/j.jenvman.2012.08.032] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2012] [Revised: 08/08/2012] [Accepted: 08/10/2012] [Indexed: 06/01/2023]
Abstract
This study was conducted at a centralized wastewater treatment plant that receives discharges from nearly 160 industries. The chemical oxygen demand (COD) was fractionated for two objectives: delineation of the limits of the activated sludge process being used at the plant, and evaluation of the potential environmental impact of the treated effluent. Physico-chemical analyses, respirometric and biodegradation tests, as well as COD fractionation were carried out. Molasses-wastewaters were determined to be the major contribution to the plant. The influent was dark brown in color, with a relatively high content of both organics (2503 mg/L COD) and salts (5459 μS/cm conductivity), but a low biochemical oxygen demand (568 mg/L BOD(5)) and BOD(5)/COD ratio (0.24). The degradability of the organics was limited by the high content of inert soluble COD (S(I)). The COD fractionation pattern was 40-20-40% for S(I), X(I) (inerts) and S(H) (soluble hydrolyzable), respectively. More than 90% BOD(5) removal was obtained, which was sufficient for the plant to meet the national Standards. However, the effluent discharged into the river was intensely colored and polluted (>1000 mg/L COD, >5000 μS/cm), emphasizing the need for legislation regulating COD, color and salinity, and for upgraded treatment methods worldwide for molasses wastewaters.
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Affiliation(s)
- C Fall
- Centro Interamericano de Recursos del Agua, Universidad Autónoma del Estado de México, Apartado postal 367, CP 50091 Toluca, Mexico.
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Piñón-Castillo H, Brito E, Goñi-Urriza M, Guyoneaud R, Duran R, Nevarez-Moorillon G, Gutiérrez-Corona J, Caretta C, Reyna-López G. Hexavalent chromium reduction by bacterial consortia and pure strains from an alkaline industrial effluent. J Appl Microbiol 2010; 109:2173-82. [DOI: 10.1111/j.1365-2672.2010.04849.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Xiao Y, Roberts DJ. A review of anaerobic treatment of saline wastewater. ENVIRONMENTAL TECHNOLOGY 2010; 31:1025-1043. [PMID: 20662390 DOI: 10.1080/09593331003734202] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Large volumes of saline (> 2% w/v NaCl) wastewaters are discharged from many industries; e.g. seafood processing, textile dyeing, oil and gas production, tanneries and drinking water treatment processes. Although anaerobic treatment would be the most cost-effective and sustainable technology for the treatment of many of these saline wastewaters, the salinity is considered to be inhibitory to anaerobic biological treatment processes. The recent applications of salt-tolerant cultures for the treatment of wastewaters from seafood processing and ion-exchange processes suggest that biological systems can be used to treat salty wastewaters. Additionally, organisms capable of anaerobic degradation of contaminants in saline solutions have been observed in marine sediments and have been characterized during the last two decades. This manuscript provides a review of the recent research on anaerobic treatment of saline wastewater and bacterial consortia capable of the anaerobic degradation of pollutants in saline solutions, documenting that the biological treatment of saline wastewaters is promising.
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Affiliation(s)
- Yeyuan Xiao
- School of Engineering, University of British Columbia Okanagan, 3333 University Way, Kelowna BC, Canada
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Identification and Characteristics of A Novel Salt-Tolerant Exiguobacterium sp. for Azo Dyes Decolorization. Appl Biochem Biotechnol 2009; 159:728-38. [DOI: 10.1007/s12010-009-8546-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2008] [Accepted: 01/20/2009] [Indexed: 10/21/2022]
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De Felice M, Mattanovich D, Papagianni M, Wegrzyn G, Villaverde A. The scientific impact of microbial cell factories. Microb Cell Fact 2008; 7:33. [PMID: 19046424 PMCID: PMC2630955 DOI: 10.1186/1475-2859-7-33] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2008] [Accepted: 12/01/2008] [Indexed: 12/27/2022] Open
Affiliation(s)
- Maurilio De Felice
- Institute for Biotechnology and Biomedicine, Autonomous University of Barcelona, Barcelona, Spain.
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