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Liu H, Luo J, Shukla P. Effluents detoxification from pulp and paper industry using microbial engineering and advanced oxidation techniques. JOURNAL OF HAZARDOUS MATERIALS 2020; 398:122998. [PMID: 32502804 DOI: 10.1016/j.jhazmat.2020.122998] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2020] [Revised: 05/11/2020] [Accepted: 05/18/2020] [Indexed: 06/11/2023]
Abstract
Due to the high demand of paper and related items, pulp and paper industry is flourishing day by day. With increased production, come the hazards associated with the toxic elements present in the effluents. Various microorganisms are currently employed in the remediation of these toxic effluents. In addition, various techniques like ozonation, electrocoagulation, UV treatment, Fenton's reagent, and photo-Fenton based techniques are used in advanced oxidation processes to reduce these toxins from effluents. This review highlights various above mentioned advanced techniques and innovative processes along with the biological remediation of these toxic effluents with the help of some potential microbial consortia or their combinatory effects. Moreover, the present review will also disclose the ideas on utilizing the tools of metabolic engineering, systems biology, and artificial intelligence towards microbial engineering for relatively better bioremediation processes. In the future, these techniques might be helpful in increasing the capability of microbial consortia towards detoxification of effluents to make them environmentally safe. Finally, this review gives well-synchronized approaches to get more insights into these innovative methodologies and techniques and their use for various industrial applications.
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Affiliation(s)
- Hao Liu
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, PR China
| | - Jianfei Luo
- Guangdong Key Laboratory of Fermentation and Enzyme Engineering, School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, PR China
| | - Pratyoosh Shukla
- Enzyme Technology and Protein Bioinformatics Laboratory, Department of Microbiology, Maharshi Dayanand University, Rohtak 124001, Haryana, India.
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Nogueira V, Lopes I, Rocha-Santos TAP, Gonçalves F, Pereira R. Treatment of real industrial wastewaters through nano-TiO 2 and nano-Fe 2O 3 photocatalysis: case study of mining and kraft pulp mill effluents. ENVIRONMENTAL TECHNOLOGY 2018; 39:1586-1596. [PMID: 28532345 DOI: 10.1080/09593330.2017.1334093] [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: 10/18/2016] [Accepted: 05/18/2017] [Indexed: 06/07/2023]
Abstract
High quantities of industrial wastewaters containing a wide range of organic and inorganic pollutants are being directly discharged into the environment, sometimes without proper treatment. Nanotechnology has a tremendous potential improving the existing treatments or even develop new treatment solutions. In this study, nano-TiO2 or nano-Fe2O3 was used for the photocatalytic treatment of kraft pulp mill effluent and mining effluent. The experiments with the organic effluent lead to reduction percentages of 93.3%, 68.4% and 89.8%, for colour, aromatic compounds and chemical oxygen demand, respectively, when treated with nano-TiO2/H2O2/UV and nano-Fe2O3/H2O2/UV, at pH 3.0. Significant removal of metals from the mining effluent was recorded but only for Zn, Al and Cd, the highest removal attained with 1.0 g L-1 of nano-TiO2/UV and nano-Fe2O3/UV. Regarding the toxicity of the organic effluent to Vibrio fischeri, it was reduced with the treatments combining the oxidant and the catalyst. However, for the inorganic effluent, the best reduction was achieved using 1.0 g L-1 of catalyst. In fact, the increase in dose of the catalyst, especially for nano-TiO2, enhanced toxicity reduction. Our results have shown that the use of these NMs seemed to be more effective in the organic effluent than in metal-rich effluent.
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Affiliation(s)
- V Nogueira
- a Department of Biology, Faculty of Science , University of Porto , Porto , Portugal
- b Research (CIIMAR/CIMAR) , University of Porto , Porto , Portugal
| | - I Lopes
- c Department of Biology , University of Aveiro , Aveiro , Portugal
- d CESAM (Centre for Environmental and Marine Studies) , University of Aveiro , Aveiro , Portugal
| | - T A P Rocha-Santos
- d CESAM (Centre for Environmental and Marine Studies) , University of Aveiro , Aveiro , Portugal
- e Department of Chemistry , University of Aveiro , Aveiro , Portugal
| | - F Gonçalves
- c Department of Biology , University of Aveiro , Aveiro , Portugal
- d CESAM (Centre for Environmental and Marine Studies) , University of Aveiro , Aveiro , Portugal
| | - R Pereira
- a Department of Biology, Faculty of Science , University of Porto , Porto , Portugal
- b Research (CIIMAR/CIMAR) , University of Porto , Porto , Portugal
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Ramírez ME, Vélez YH, Rendón L, Alzate E. Potential of microalgae in the bioremediation of water with chloride content. BRAZ J BIOL 2017; 78:472-476. [DOI: 10.1590/1519-6984.169372] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2016] [Accepted: 02/01/2017] [Indexed: 11/22/2022] Open
Abstract
Abstract In this work it was carried out the bioremediation of water containing chlorides with native microalgae (MCA) provided by the Centre for study and research in biotechnology (CIBIOT) at Universidad Pontificia Bolivariana. Microalgae presented an adaptation to the water and so the conditions evaluated reaching a production of CO2 in mg L-1 of 53.0, 26.6, 56.0, 16.0 and 30.0 and chloride removal efficiencies of 16.37, 26.03, 40.04, 25.96 and 20.25% for microalgae1, microalgae2, microalgae3, microalgae4 and microalgae5 respectively. Water bioremediation process was carried out with content of chlorides in fed batch system with an initial concentration of chlorides of 20585 mg L-1 every 2 days. The Manipulated variables were: the flow of MCA3 (10% inoculum) for test one; NPK flow for test two, and flow of flow of MCA3+0.5 g L-1 NPK. Chloride removal efficiencies were 66.88%, 63.41% and 66.98% for test one, two and three respectively, for a total bioprocess time of 55 days.
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Affiliation(s)
| | - Y. H. Vélez
- Universidad Pontificia Bolivariana, Colombia
| | - L. Rendón
- Universidad Pontificia Bolivariana, Colombia
| | - E. Alzate
- Universidad Pontificia Bolivariana, Colombia
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Freitas AM, Rivas G, Campos-Mañas MC, Casas López JL, Agüera A, Sánchez Pérez JA. Ecotoxicity evaluation of a WWTP effluent treated by solar photo-Fenton at neutral pH in a raceway pond reactor. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:1093-1104. [PMID: 27335017 DOI: 10.1007/s11356-016-7101-7] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2015] [Accepted: 06/14/2016] [Indexed: 05/22/2023]
Abstract
Some pollutants can be resistant to wastewater treatment, hence becoming a risk to aquatic and terrestrial biota even at the very low concentrations (ng L-1-μg L-1) they are commonly found at. Tertiary treatments are used for micropollutant removal but little is known about the ecotoxicity of the treated effluent. In this study, a municipal secondary effluent was treated by a solar photo-Fenton reactor at initial neutral pH in a raceway pond reactor, and ecotoxicity was evaluated before and after micropollutant removal. Thirty-nine micropollutants were identified in the secondary effluent, mainly pharmaceuticals, with a total concentration of ≈80 μg L-1. After treatment, 99 % microcontaminant degradation was reached. As for ecotoxicity reduction, the assayed organisms showed the following sensitivity levels: Tetrahymena thermophila > Daphnia magna > Lactuca sativa > Spirodela polyrhiza ≈ Vibrio fischeri. The initial effluent showed an inhibitory effect of 40 % for T. thermophila and 20 % for D. magna. After 20 min of photo-Fenton treatment, no toxic effect was observed for T. thermophila and toxicity dropped to 5 % for D. magna. Graphical abstract Ecotoxicity removal by solar photo-Fenton at neutral pH. ᅟ.
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Affiliation(s)
- A M Freitas
- Department of Chemistry and Biology, Federal University of Technology-Paraná (UTFPR), Curitiba, Brazil
| | - G Rivas
- Solar Energy Research Centre (CIESOL), University of Almería-CIEMAT, Almería, Spain
| | - M C Campos-Mañas
- Solar Energy Research Centre (CIESOL), University of Almería-CIEMAT, Almería, Spain
| | - J L Casas López
- Solar Energy Research Centre (CIESOL), University of Almería-CIEMAT, Almería, Spain
| | - A Agüera
- Solar Energy Research Centre (CIESOL), University of Almería-CIEMAT, Almería, Spain
| | - J A Sánchez Pérez
- Solar Energy Research Centre (CIESOL), University of Almería-CIEMAT, Almería, Spain.
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Nogueira V, Lopes I, Rocha-Santos T, Gonçalves F, Pereira R. Toxicity of solid residues resulting from wastewater treatment with nanomaterials. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2015; 165:172-178. [PMID: 26057932 DOI: 10.1016/j.aquatox.2015.05.021] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2015] [Revised: 05/21/2015] [Accepted: 05/24/2015] [Indexed: 06/04/2023]
Abstract
Nanomaterials (NMs) are widely recommended for wastewater treatments due to their unique properties. Several studies report the different advantages of nanotechnology in the remediation of wastewaters, but limited research has been directed toward the fate and potential impacts of the solid residues (SRs) produced after the application of such technologies. The present work aimed at investigating the ecotoxicity of SRs resulting from the treatment of three effluents (OOMW, kraft pulp mill, and mining drainage) with two NMs (TiO2 and Fe2O3). The invertebrate Chironomus riparius was selected as test organism and exposed to the residues. The effect on percentage of survival and growth was assessed. Results showed that the SRs from the treatments nano-TiO2(1.0gL(-1))/H2O2(0.5M) and nano-Fe2O3(1.0gL(-1))/H2O2(1.0M) from OOMW and nano-Fe2O3(0.75gL(-1))/H2O2(0.01M) from kraft pulp mill effluent exhibited lethal toxicity to C. riparius. Only the exposure to SRs resulting from the treatment with nano-Fe2O3(0.75gL(-1))/H2O2(0.01M) applied to the kraft pulp mill effluent significantly affected the growth rate based on the head capsule width. In terms of growth rate, based on the body length, it decreased significantly after exposure to the SRs from the treatments nano-TiO2 (1.0gL(-1)) and nano-Fe2O3(0.75gL(-1))/H2O2(0.01M) of kraft paper mill effluent and nano-Fe2O3(1.0gL(-1))/H2O2(1.0M) of OOMW. According to our study the SRs can promote negative effects on C. riparius. However, the effects are dependent on the type of effluent treated as well as on the organic and inorganic compounds attached to the NMs.
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Affiliation(s)
- Verónica Nogueira
- Department of Biology, University of Aveiro, Campus Universitário de Santiago, P-3810-193 Aveiro, Portugal; CESAM (Centre for Environmental and Marine Studies), University of Aveiro, Campus de Santiago 3810-193 Aveiro, Portugal.
| | - Isabel Lopes
- Department of Biology, University of Aveiro, Campus Universitário de Santiago, P-3810-193 Aveiro, Portugal; CESAM (Centre for Environmental and Marine Studies), University of Aveiro, Campus de Santiago 3810-193 Aveiro, Portugal
| | - Teresa Rocha-Santos
- CESAM (Centre for Environmental and Marine Studies), University of Aveiro, Campus de Santiago 3810-193 Aveiro, Portugal; Department of Chemistry, University of Aveiro, Campus Universitário de Santiago, P-3810-193 Aveiro, Portugal
| | - Fernando Gonçalves
- Department of Biology, University of Aveiro, Campus Universitário de Santiago, P-3810-193 Aveiro, Portugal; CESAM (Centre for Environmental and Marine Studies), University of Aveiro, Campus de Santiago 3810-193 Aveiro, Portugal
| | - Ruth Pereira
- Department of Biology, Faculty of Sciences, University of Porto, Rua do Campo Alegre, 4169-007 Porto, Portugal; Research (CIIMAR/CIMAR), University of Porto, Rua dos Bragas 289, P 4050-123 Porto, Portugal
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Nogueira V, Lopes I, Freitas AC, Rocha-Santos TAP, Gonçalves F, Duarte AC, Pereira R. Biological treatment with fungi of olive mill wastewater pre-treated by photocatalytic oxidation with nanomaterials. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2015; 115:234-242. [PMID: 25723133 DOI: 10.1016/j.ecoenv.2015.02.028] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2014] [Revised: 02/16/2015] [Accepted: 02/17/2015] [Indexed: 06/04/2023]
Abstract
Olive mill wastewater (OMW) still is a major environmental problem due to its high chemical oxygen demand (COD) and total phenolic content (TPC), contributing for the high toxicity and recalcitrant nature. Several attempts have been made for developing more efficient treatment processes, but no chemical or biological approaches were found to be totally effective, especially in terms of toxicity reduction. In this context, the main purpose of this study was to investigate the treatability of OMW by the combination of photocatalytic oxidation, using two nanomaterials as catalysts (TiO2 and Fe2O3), with biological degradation by fungi (Pleurotus sajor caju and Phanerochaete chrysosporium). Photocatalytic oxidation was carried out using different systems, nano-TiO2/UV, nano-Fe2O3/UV, nano-TiO2/H2O2/UV and nano-Fe2O3/H2O2/UV. The effectiveness of the treatment was assessed through color (465nm), aromatics (270nm), COD and TPC reductions, as well as by the decrease in toxicity using the bacterium Vibrio fischeri. The chemical treatment with the system nano-TiO2/H2O2/UV promoted 43%, 14%, 38% and 31% reductions in color, aromatics content, COD and TPC, respectively. However no toxicity reduction was observed. The combination with a biological treatment increased the reduction of COD and TPC as well as a reduction in toxicity. The treatment with P. chrysosporium promoted the highest reduction in toxicity, but P. sajor caju was responsible for the best reduction in COD and TPC. However, the biological treatment was more effective when no hydrogen peroxide was used in the pre-treatment.
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Affiliation(s)
- V Nogueira
- Department of Biology, University of Aveiro, Campus Universitário de Santiago, P-3810-193 Aveiro, Portugal; CESAM (Centre for Environmental and Marine Studies), University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal.
| | - I Lopes
- Department of Biology, University of Aveiro, Campus Universitário de Santiago, P-3810-193 Aveiro, Portugal; CESAM (Centre for Environmental and Marine Studies), University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
| | - A C Freitas
- CESAM (Centre for Environmental and Marine Studies), University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal; ISEIT/Viseu, Instituto Piaget, Estrada do Alto do Gaio, Galifonge, Lordosa, 3515-776 Viseu, Portugal; Department of Chemistry, University of Aveiro, Campus Universitário de Santiago, P-3810-193 Aveiro, Portugal
| | - T A P Rocha-Santos
- CESAM (Centre for Environmental and Marine Studies), University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal; Department of Chemistry, University of Aveiro, Campus Universitário de Santiago, P-3810-193 Aveiro, Portugal
| | - F Gonçalves
- Department of Biology, University of Aveiro, Campus Universitário de Santiago, P-3810-193 Aveiro, Portugal; CESAM (Centre for Environmental and Marine Studies), University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
| | - A C Duarte
- CESAM (Centre for Environmental and Marine Studies), University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal; Department of Chemistry, University of Aveiro, Campus Universitário de Santiago, P-3810-193 Aveiro, Portugal
| | - R Pereira
- Department of Biology, Faculty of Science, University of Porto, Rua do Campo Alegre 4169-007 Porto, Portugal; Research (CIIMAR/CIMAR), University of Porto, Rua dos Bragas 289, P-4050-123 Porto, Portugal
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Hermosilla D, Merayo N, Gascó A, Blanco Á. The application of advanced oxidation technologies to the treatment of effluents from the pulp and paper industry: a review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2015; 22:168-91. [PMID: 25185495 DOI: 10.1007/s11356-014-3516-1] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2014] [Accepted: 08/24/2014] [Indexed: 05/24/2023]
Abstract
The paper industry is adopting zero liquid effluent technologies to reduce freshwater use and meet environmental regulations, which implies closure of water circuits and the progressive accumulation of pollutants that must be removed before water reuse and final wastewater discharge. The traditional water treatment technologies that are used in paper mills (such as dissolved air flotation or biological treatment) are not able to remove recalcitrant contaminants. Therefore, advanced water treatment technologies, such as advanced oxidation processes (AOPs), are being included in industrial wastewater treatment chains aiming to either improve water biodegradability or its final quality. A comprehensive review of the current state of the art regarding the use of AOPs for the treatment of the organic load of effluents from the paper industry is herein addressed considering mature and emerging treatments for a sustainable water use in this sector. Wastewater composition, which is highly dependent on the raw materials being used in the mills, the selected AOP itself, and its combination with other technologies, will determine the viability of the treatment. In general, all AOPs have been reported to achieve good organic removal efficiencies (COD removal >40%, and about an extra 20% if AOPs are combined with biological stages). Particularly, ozonation has been the most extensively reported and successfully implemented AOP at an industrial scale for effluent treatment or reuse within pulp and paper mills, although Fenton processes (photo-Fenton particularly) have actually addressed better oxidative results (COD removal ≈ 65-75%) at a lab scale, but still need further development at a large scale.
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Affiliation(s)
- Daphne Hermosilla
- Department of Chemical Engineering, Complutense University of Madrid, Ciudad Universitaria s/n, 28040, Madrid, Spain,
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Singhal A, Thakur IS. Two step sequential treatment of pulp and paper mill effluent by Cryptococcus albidus and Emericella nidulans var. nidulans in 2L bioreactor. CAN J CHEM ENG 2011. [DOI: 10.1002/cjce.20547] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Diniz MS, Peres I, Castro L, Freitas AC, Rocha-Santos TAP, Pereira R, Duarte AC. Impact of a secondary treated bleached Kraft pulp mill effluent in both sexes of goldfish (Carassius auratus L.). JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2010; 45:1858-1865. [PMID: 20954041 DOI: 10.1080/10934529.2010.520517] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The aim of the present study was to assess the toxic effects of a secondary treated effluent from a modern pulp mill processing Eucalyptus globulus on both sexes of goldfish. The effects in the exposed fish were investigated by measuring biomarkers which have been used to assess the effects of BKME on aquatic biota, with particular emphasis in fish. However, few studies have been focused on effluents from pulp mill plants processing eucalyptus. The relative proportion of cytochrome P450 (CYP1A) and vitellogenin (VTG) induction were analyzed in the livers of males and females goldfish, exposed to different concentrations of a bleached Kraft pulp mill (BKPM) effluent. Somatic indices such as HSI (hepatosomatic index) and GSI (gonadosomatic index) were calculated and a significant reduction was found in males GSI. A significant increase of HSI was recorded for both sexes exposed to 50% BKPM effluent. Exposure to BKPM effluent induced CYP1A synthesis in both sexes and decreased VTG synthesis in females according to the different effluent concentrations suggesting that the secondary treated effluent contained compounds that affect fish negatively. The results suggest that BKPM effluent can cause sex-related biochemical changes in xenobiotic metabolism.
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Affiliation(s)
- M S Diniz
- REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Centro de Química Fina e Biotecnologia, Universidade Nova de Lisboa, Caparica, Portugal.
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Justino C, Marques AG, Rodrigues D, Silva L, Duarte AC, Rocha-Santos T, Freitas AC. Evaluation of tertiary treatment by fungi, enzymatic and photo-Fenton oxidation on the removal of phenols from a kraft pulp mill effluent: a comparative study. Biodegradation 2010; 22:267-74. [DOI: 10.1007/s10532-010-9395-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2010] [Accepted: 07/20/2010] [Indexed: 11/30/2022]
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Justino C, Marques AG, Duarte KR, Duarte AC, Pereira R, Rocha-Santos T, Freitas AC. Degradation of phenols in olive oil mill wastewater by biological, enzymatic, and photo-Fenton oxidation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2010; 17:650-656. [PMID: 19841956 DOI: 10.1007/s11356-009-0256-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2009] [Accepted: 09/30/2009] [Indexed: 05/28/2023]
Abstract
BACKGROUND, AIM, AND SCOPE Olive oil mill wastewater (OOMW) environmental impacts minimization have been attempted by developing more effective processes, but no chemical or biological treatments were found to be totally effective to mitigate their impact on receiving systems. This work is the first that reports simultaneously the efficiency of three different approaches: biological treatment by two fungal species (Trametes versicolor or Pleurotus sajor caju), enzymatic treatment by laccase, and chemical treatment by photo-Fenton oxidation on phenols removal. MATERIALS AND METHODS Those treatments were performed on OOMW with or without phenol supplement (p-coumaric, vanillin, guaiacol, vanillic acid, or tyrosol). OOMW samples resulted from treatments were extracted for phenols using liquid-liquid extraction and analyzed by gas chromatography coupled to mass spectrometry. RESULTS Treatment with T. versicolor or P. sajor caju were able to remove between 22% and 74% and between 8% and 76% of phenols, respectively. Treatment by laccase was able to reduce 4% to 70% of phenols whereas treatment by photo-Fenton oxidation was responsible for 100% phenols reduction. DISCUSSION Range of phenol degradation was equivalent between T. versicolor, P. sajor caju and laccase for p-coumaric, guaiacol, caffeic acid, and tyrosol in supplemented OOMW, which enhances this enzyme role in the biological treatment promoted by these two species. CONCLUSIONS Phenols were removed more efficiently by photo-Fenton treatment than by biological or enzymatic treatments. RECOMMENDATIONS AND PERSPECTIVES Use of fungi, laccase, or photo-Fenton presents great potential for removing phenols from OOMW. This should be further assessed by increasing the application scale and the reactor configurations effect on the performance, besides a toxicity evaluation of treated wastewater in comparison to raw wastewater.
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Affiliation(s)
- Celine Justino
- ISEIT/Viseu, Instituto Piaget, Estrada do Alto do Gaio, Viseu, Portugal.
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Justino CI, Duarte K, Loureiro F, Pereira R, Antunes SC, Marques SM, Gonçalves F, Rocha-Santos TAP, Freitas AC. Toxicity and organic content characterization of olive oil mill wastewater undergoing a sequential treatment with fungi and photo-Fenton oxidation. JOURNAL OF HAZARDOUS MATERIALS 2009; 172:1560-1572. [PMID: 19740604 DOI: 10.1016/j.jhazmat.2009.08.028] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2009] [Revised: 08/04/2009] [Accepted: 08/07/2009] [Indexed: 05/28/2023]
Abstract
Olive oil mill wastewater (OOMW) is responsible for serious environmental problems. In this study, the efficiency of two treatments involving fungi and photo-Fenton oxidation, sequentially applied to OOMW was analyzed for organic compounds degradation and toxicity mitigation. The treatment with fungi (especially Pleurotus sajor caju) of diluted OOMW samples promoted a reduction of their acute toxicity to Daphnia longispina. Although this fungi species have not induced significant color reduction it was responsible for 72,91 and 77% reductions in chemical oxygen demand (COD), total phenolic and organic compound contents. After biological treatment, photo-Fenton oxidation seemed to be an interesting solution, especially for color reduction. However, the OOMWs remained highly toxic after photo-Fenton oxidation. Considering the second sequence of treatments, namely photo-Fenton oxidation followed by biological treatment, the former revealed, once more, a great potential because it can be applied to non-diluted OOMW, with significant reductions in COD (53-76%), total phenolic content (81-92%) and organic compounds content (100%). Despite fungal species still have demonstrated a high capacity for bioaccumulation of organic compounds, resulting from photo-Fenton oxidation, the biological treatment did not cause substantial benefits in terms of COD, total phenolic content and toxicity reduction.
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Affiliation(s)
- Celine I Justino
- ISEIT/Viseu, Instituto Piaget, Estrada do Alto do Gaio, Galifonge, 3515-776 Lordosa, Viseu, Portugal
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