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Alves Lima F, Rola JC, Gomes de Freitas MM, de Almeida Afonso JMM, de Resende MM. Acid Phosphatase Immobilization and Production Study by
Trichoderma
spp. in Soybean Molasses. Chem Eng Technol 2022. [DOI: 10.1002/ceat.202100208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Frederico Alves Lima
- Federal University of Uberlândia Chemical Engineering Faculty Av. João Naves de Ávila 2121, Campus Santa Mônica, Bloco 1K 38408-144 Uberlândia MG Brazil
| | - Juliana Cristina Rola
- Federal University of Uberlândia Chemical Engineering Faculty Av. João Naves de Ávila 2121, Campus Santa Mônica, Bloco 1K 38408-144 Uberlândia MG Brazil
| | - Matheus Marçal Gomes de Freitas
- Federal University of Uberlândia Chemical Engineering Faculty Av. João Naves de Ávila 2121, Campus Santa Mônica, Bloco 1K 38408-144 Uberlândia MG Brazil
| | | | - Miriam Maria de Resende
- Federal University of Uberlândia Chemical Engineering Faculty Av. João Naves de Ávila 2121, Campus Santa Mônica, Bloco 1K 38408-144 Uberlândia MG Brazil
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Bioremediation of motor oil-contaminated soil and water by a novel indigenous Pseudomonas otitidis strain DU13 and characterization of its biosurfactant. 3 Biotech 2022; 12:68. [PMID: 35223354 PMCID: PMC8837742 DOI: 10.1007/s13205-022-03133-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Accepted: 01/28/2022] [Indexed: 11/01/2022] Open
Abstract
Production of biosurfactant by a novel indigenous isolate Pseudomonas otitidis strain DU13 and its role in bioremediation of petroleum hydrocarbon is reported. The identity of the isolate was confirmed by 16S rDNA gene sequencing analysis (Genbank accession: MK177190). The biosurfactant produced by the isolate could reduce the surface tension of petroleum supplemented medium by 46% just after 7 days of treatment. The emulsification index (E 24 ) of the surfactant was found 37, 35, and 20%, respectively, against used motor oil, diesel, and kerosene. The FTIR spectrum of the crude biosurfactant showed the presence of υC-H stretch, υCH2, υ-C=C stretch and υC-H bonding. The isolated strain could degrade 26% of TPH content of used motor oil in liquid culture. Whereas, ex situ pilot-scale field trial demonstrated very high bioremediation potential of the isolate in terms of germination rate of Vigna radiata and Cicer arietinum seeds and plant growth just after 20 days of treatment.
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García-Bautista I, García-Cruz U, Pacheco N, García-Maldonado JQ, Aguirre-Macedo ML. Optimization of the Biodegradation of Aliphatic, Aromatic, and UCM Hydrocarbons from Light Crude Oil in Marine Sediment Using Response Surface Methodology (RSM). BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2022; 108:107-113. [PMID: 34160637 DOI: 10.1007/s00128-021-03281-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2020] [Accepted: 06/03/2021] [Indexed: 06/13/2023]
Abstract
This study describes the optimization of the biodegradation of total aliphatic (tAHCs), total aromatic (tPAHs), and unresolved complex mixture (UCM) hydrocarbons from light crude oil in marine sediment. The response surface methodology (RSM), with a Box-Behnken design, was used to optimize the hydrocarbon fraction degradation, reported as degradation efficiency (E (%)), using four independent variables (inoculum, dispersant, light oil concentration, and carbon/nitrogen ratio), all at three levels. Analysis of variance (ANOVA) showed R2 values of 0.976, 0.974, and 0.975 for tAHCs, tPAHs, and UCM, respectively. All fractions exhibited a statistically significant effect (P < 0.05) in the second-order quadratic regression model for degradation. According to the models, the optimal degradation prediction was: 81.03% for tAHCs, 85.96% for tPAHs, and 92.86% for UCM. This work highlights the possibility of carrying out efficient biodegradation, of more than 80%, through an optimization process using different light oil concentrations, opening up possibilities of multiple response optimization.
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Affiliation(s)
- Itzá García-Bautista
- Departamento de Recursos del Mar, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV) Unidad Mérida, Mérida, México
| | - Ulises García-Cruz
- Consorcio de Investigación del Golfo de México (CIGoM), Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV) Unidad Mérida, Mérida, México.
| | - Neith Pacheco
- Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco, Subsede Sureste, Parque Científico Tecnológico de Yucatán, Km 5.5, Carretera Sierra Papacal-Chuburná Puerto, 97302, Mérida, Yucatán, México
| | - José Q García-Maldonado
- Departamento de Recursos del Mar, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV) Unidad Mérida, Mérida, México
| | - M Leopoldina Aguirre-Macedo
- Departamento de Recursos del Mar, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV) Unidad Mérida, Mérida, México.
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Li J, Lu Q, Odey EA, Lok KS, Pan B, Zhang Y, Shim H. Coupling of biostimulation and bioaugmentation for enhanced bioremoval of chloroethylenes and BTEX from clayey soil. ECOTOXICOLOGY (LONDON, ENGLAND) 2021; 30:1446-1453. [PMID: 33411164 DOI: 10.1007/s10646-020-02323-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 11/21/2020] [Indexed: 06/12/2023]
Abstract
The bioremoval potential of Pseudomonas plecoglossicida toward mixed contaminants was explored through the coupled biostimulation and bioaugmentation in soil microcosm. Response surface methodology was employed to optimize nutrients and innoculum size for the cometabolic removal of two representative chloroethylenes, trichloroethylene (TCE) and cis-1,2-dichloroethylene (cis-DCE), mixed with benzene, toluene, ethylbenzene, and xylenes (BTEX). The interactive effects of nutrients [nitrogen (N) and phosphorus (P)] and inoculum size toward the bioremoval of mixture of BTEX (600 mg kg-1), cis-DCE (10 mg kg-1), and TCE (10 mg kg-1) were estimated using principal component analysis and two-dimensional hierarchical cluster analysis. The optimal condition was confirmed with C:N:P ratio of 100:26.7:1.8-4.8 and higher inoculum size (≥25%), where 97.7% of benzene, 98.3% of toluene, 91.2% of ethylbenzene, 45.6% of m,p-xylene, 31.2% of o-xylene, 26.9% of cis-DCE, and 33.5% of TCE were bioremoved.
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Affiliation(s)
- Junhui Li
- Center for Ecosystem Science and Society, Northern Arizona University, Flagstaff, AZ, 86011, USA
| | - Qihong Lu
- Faculty of Science and Technology, Department of Civil and Environmental Engineering, University of Macau, Macau SAR, 999078, China
- School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou, 510006, China
| | - Emmanuel Alepu Odey
- Faculty of Science and Technology, Department of Civil and Environmental Engineering, University of Macau, Macau SAR, 999078, China
| | - Keng Seng Lok
- Faculty of Science and Technology, Department of Civil and Environmental Engineering, University of Macau, Macau SAR, 999078, China
| | - Bingcai Pan
- Department of Environmental Engineering, Nanjing University, Nanjing, 210023, China
| | - Yanyang Zhang
- Department of Environmental Engineering, Nanjing University, Nanjing, 210023, China
| | - Hojae Shim
- Faculty of Science and Technology, Department of Civil and Environmental Engineering, University of Macau, Macau SAR, 999078, China.
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Wang S, Wang D, Yu Z, Dong X, Liu S, Cui H, Sun B. Advances in research on petroleum biodegradability in soil. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2021; 23:9-27. [PMID: 33393551 DOI: 10.1039/d0em00370k] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
With the increased demand for petroleum and petroleum products from all parts of the society, environmental pollution caused by petroleum development and production processes is becoming increasingly serious. Soil pollution caused by petroleum seriously affects environmental quality in addition to human lives and productivity. At present, petroleum in soil is mainly degraded by biological methods. In their natural state, native bacteria in the soil spontaneously degrade petroleum pollutants that enter the soil; however, when the pollution levels increase, the degradation rates decrease, and it is necessary to add nutrients, dissolved oxygen, biosurfactants and other additives to improve the degradation ability of the native bacteria in the soil. The degradation process can also be enhanced by adding exogenous petroleum-degrading bacteria, microbial immobilization technologies, and microbial fuel cell technologies.
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Affiliation(s)
- Song Wang
- School of Earth Science, Northeast Petroleum University, Daqing, China
| | - Dan Wang
- School of Earth Science, Northeast Petroleum University, Daqing, China
| | - Zhongchen Yu
- School of Civil Architecture Engineering, Northeast Petroleum University, Daqing, China.
| | - Xigui Dong
- 2nd Oil Production Plant Daqing Oilfield Co. Ltd, Daqing, China
| | - Shumeng Liu
- 2nd Oil Production Plant Daqing Oilfield Co. Ltd, Daqing, China
| | - Hongmei Cui
- School of Civil Architecture Engineering, Northeast Petroleum University, Daqing, China.
| | - Bing Sun
- 2nd Oil Production Plant Daqing Oilfield Co. Ltd, Daqing, China
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Sun W, Ali I, Liu J, Dai M, Cao W, Jiang M, Saren G, Yu X, Peng C, Naz I. Isolation, identification, and characterization of diesel-oil-degrading bacterial strains indigenous to Changqing oil field, China. J Basic Microbiol 2019; 59:723-734. [PMID: 31081547 DOI: 10.1002/jobm.201800674] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 04/04/2019] [Accepted: 04/25/2019] [Indexed: 11/07/2022]
Abstract
In the present study, 12 indigenous diesel-oil-degrading bacteria were isolated from the petroleum-contaminated soils of the Changqing oil field (Xi'an, China). Measurement of the diesel-oil degradation rates of these strains by the gravimetric method revealed that they ranged from 42% to 66% within 2 weeks. The highest degradation rates were observed from strains CQ8-1 (66%), CQ8-2 (62.6%), and CQ11 (59%), which were identified as Bacillus thuringiensis, Ochrobactrum anthropi, and Bordetella bronchialis, respectively, based on their 16S rDNA sequences. Moreover, the physiological and biochemical properties of these three strains were analyzed by Gram staining, catalase, oxidase, and Voges-Proskauer tests. Transmission electron microscopy showed that all three strains were rod shaped with flagella. Gas chromatography and mass spectrometric analyses indicated that medium- and long-chain n-alkanes in diesel oil (C11-C29) were degraded to different degrees by B. thuringiensis, O. anthropi, and B. bronchialis, and the degradation rates gradually decreased as the carbon numbers increased. Overall, the results of this study indicate strains CQ8-1, CQ8-2, and CQ11 might be useful for environmentally friendly and cost-effective bioremediation of oil-contaminated soils.
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Affiliation(s)
- Wuyang Sun
- The Key Lab of Marine Environmental Science and Ecology, Ministry of Education, Ocean University of China, Qingdao, China
| | - Imran Ali
- The Key Lab of Marine Environmental Science and Ecology, Ministry of Education, Ocean University of China, Qingdao, China
| | - Jiwei Liu
- The Key Lab of Marine Environmental Science and Ecology, Ministry of Education, Ocean University of China, Qingdao, China
| | - Min Dai
- School of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing, China
| | - Wenrui Cao
- The Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China
| | - Mingyu Jiang
- The Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China
| | - Gaowa Saren
- The Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China
| | - Xinke Yu
- The Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China
| | - Changsheng Peng
- The Key Lab of Marine Environmental Science and Ecology, Ministry of Education, Ocean University of China, Qingdao, China
- School of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing, China
| | - Iffat Naz
- Department of Biology, Qassim University, Buraidah, Kingdom of Saudi Arabia (KSA)
- Department of Microbiology, Quaid-i-Azam University, Islamabad, Pakistan
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Wang SY, Kuo YC, Hong A, Chang YM, Kao CM. Bioremediation of diesel and lubricant oil-contaminated soils using enhanced landfarming system. CHEMOSPHERE 2016; 164:558-567. [PMID: 27627466 DOI: 10.1016/j.chemosphere.2016.08.128] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2016] [Revised: 08/10/2016] [Accepted: 08/27/2016] [Indexed: 06/06/2023]
Abstract
Lubricant and diesel oil-polluted sites are difficult to remediate because they have less volatile and biodegradable characteristics. The goal of this research was to evaluate the potential of applying an enhanced landfarming to bioremediate soils polluted by lubricant and diesel. Microcosm study was performed to evaluate the optimal treatment conditions with the addition of different additives (nutrients, addition of activated sludge from oil-refining wastewater facility, compost, TPH-degrading bacteria, and fern chips) to enhance total petroleum hydrocarbon (TPH) removal. To simulate the aerobic landfarming biosystem, air in the microcosm headspace was replaced once a week. Results demonstrate that the additives of activated sludge and compost could result in the increase in soil microbial populations and raise TPH degradation efficiency (up to 83% of TPH removal with 175 days of incubation) with initial (TPH = 4100 mg/kg). The first-order TPH degradation rate reached 0.01 1/d in microcosms with additive of activated sludge (mass ratio of soil to inocula = 50:1). The soil microbial communities were determined by nucleotide sequence analyses and 16S rRNA-based denatured gradient gel electrophoresis. Thirty-four specific TPH-degrading bacteria were detected in microcosm soils. Chromatograph analyses demonstrate that resolved peaks were more biodegradable than unresolved complex mixture. Results indicate that more aggressive remedial measures are required to enhance the TPH biodegradation, which included the increase of (1) microbial population or TPH-degrading bacteria, (2) biodegradable carbon sources, (3) nutrient content, and (4) soil permeability.
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Affiliation(s)
- Sih-Yu Wang
- Institute of Environmental Engineering, Kaohsiung, Taiwan
| | - Yu-Chia Kuo
- Formosa Petrochemical Co., Kaohsiung, Taiwan
| | - Andy Hong
- Department of Civil and Environmental Engineering, University of Utah, Salt Lake City, USA
| | - Yu-Min Chang
- Institute of Environmental Engineering and Management, National Taipei University of Technology, Taiwan
| | - Chih-Ming Kao
- Institute of Environmental Engineering, Kaohsiung, Taiwan.
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Oliveira TVD, Cardoso SL, Vieira RB, Vieira PA, Cardoso VL. BIODEGRADATION OF EFFLUENT CONTAMINATED WITH DIESEL OIL AND GASOLINE USING CHITOSAN AS A NATURAL COAGULANT IN A CONTINUOUS PROCESS. BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING 2016. [DOI: 10.1590/0104-6632.20160334s20150193] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Vieira RB, Vieira PA, Cardoso SL, Ribeiro EJ, Cardoso VL. Sedimentation of mixed cultures using natural coagulants for the treatment of effluents generated in terrestrial fuel distribution terminals. JOURNAL OF HAZARDOUS MATERIALS 2012; 231-232:98-104. [PMID: 22795394 DOI: 10.1016/j.jhazmat.2012.06.043] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2012] [Revised: 06/20/2012] [Accepted: 06/21/2012] [Indexed: 06/01/2023]
Abstract
This study evaluated the use of natural coagulants (Moringa oleifera and chitosan) under different conditions with a mixed culture (C1 mixed culture). This culture was used for the biodegradation of hydrocarbons present in the effluent from fuel distribution terminals contaminated with diesel oil and gasoline. The biodegradation was evaluated by two central composite design (CCD) experiments: the first with varying concentrations of Moringa oleifera (MO), drying temperatures (TE) and seed drying times (TI); the second with varying concentrations of chitosan and the hydrochloric acid in which chitosan had been solubilized. The responses monitored in the CCD experiments included the sludge volume index (SVI), the turbidity removal (TR) and the specific rate of oxygen uptake (SOUR). Subsequently, the biodegradation was monitored in a sequencing batch reactor (SBR) under the optimal conditions obtained for each CCD experiment. The results indicated that the best coagulant was chitosan solubilized in 0.25 N HCl at a concentration of 50mg/L. Within five cycles with chitosan as a coagulant, the total organic carbon (TOC) removal increased from 77±1.0% to 82±0.5%, the volatile suspended solids (VSS) increased from 1.4±0.3 to 2.25±0.3 g/L and the total petroleum hydrocarbon (TPH) removal increased from 75±1.0% to 81±0.5%.
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Affiliation(s)
- R B Vieira
- Faculdade de Engenharia Química - Universidade Federal de Uberlândia, Campus Santa Mônica, 2121 - CEP: 38400-902, Uberlândia, MG, Brazil.
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Zahed MA, Aziz HA, Mohajeri L, Mohajeri S, Kutty SRM, Isa MH. Application of statistical experimental methodology to optimize bioremediation of n-alkanes in aquatic environment. JOURNAL OF HAZARDOUS MATERIALS 2010; 184:350-356. [PMID: 20837377 DOI: 10.1016/j.jhazmat.2010.08.043] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2009] [Revised: 07/06/2010] [Accepted: 08/17/2010] [Indexed: 05/29/2023]
Abstract
Response surface methodology (RSM) was employed to optimize nitrogen and phosphorus concentrations for removal of n-alkanes from crude oil contaminated seawater samples in batch reactors. Erlenmeyer flasks were used as bioreactors; each containing 250 mL dispersed crude oil contaminated seawater, indigenous acclimatized microorganism and different amounts of nitrogen and phosphorus based on central composite design (CCD). Samples were extracted and analyzed according to US-EPA protocols using a gas chromatograph. During 28 days of bioremediation, a maximum of 95% total aliphatic hydrocarbons removal was observed. The obtained Model F-value of 267.73 and probability F<0.0001 implied the model was significant. Numerical condition optimization via a quadratic model, predicted 98% n-alkanes removal for a 20-day laboratory bioremediation trial using nitrogen and phosphorus concentrations of 13.62 and 1.39 mg/L, respectively. In actual experiments, 95% removal was observed under these conditions.
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Affiliation(s)
- Mohammad Ali Zahed
- School of Civil Engineering, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia
| | - Hamidi Abdul Aziz
- School of Civil Engineering, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia
| | - Leila Mohajeri
- School of Civil Engineering, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia
| | - Soraya Mohajeri
- School of Civil Engineering, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia
| | - Shamsul Rahman Mohamed Kutty
- Civil Engineering Department, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 31750 Tronoh, Perak, Malaysia
| | - Mohamed Hasnain Isa
- Civil Engineering Department, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 31750 Tronoh, Perak, Malaysia.
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Vieira RB, Vieira PA, Ribeiro EJ, Cardoso VL. The sedimentation of mixed cultures used in the treatment of effluents generated from terrestrial fuel distribution terminals. JOURNAL OF HAZARDOUS MATERIALS 2010; 184:177-183. [PMID: 20832164 DOI: 10.1016/j.jhazmat.2010.08.021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2010] [Revised: 07/27/2010] [Accepted: 08/07/2010] [Indexed: 05/29/2023]
Abstract
This study evaluated the use of coagulants (ferric chloride and aluminium sulphate) and an anionic polyelectrolyte (polyacrylamide) in the settling of a mixed culture (C(1)), which was used for the biodegradation of hydrocarbons present in effluent of fuel distribution terminals contaminated with diesel oil and gasoline. In preliminary investigations conducted in jar tests, the optimal concentrations of coagulant were obtained for further studies. After preliminary tests, biodegradation was evaluated in a central composite design (CCD) with varying concentrations of ferric chloride and polyelectrolyte. Ferric chloride and polyelectrolyte concentrations ranged from 77.9 to 422.12 mg/L and 0.0 to 3.2mg/L, respectively. The responses monitored in CCD experiments included the sludge volume index (SVI), turbidity, and specific rate of oxygen uptake (SOUR), where values of 100mL/g, 840 nephelometric turbidity unit (NTU) and 58 mg O(2)/gh, respectively, were obtained. Subsequently, biodegradation was monitored in a sequencing batch reactor (SBR). The results indicated that within five cycles, total petroleum hydrocarbon (TPH) removal increased from 75 ± 1.0% to 79 ± 0.5%, while the volatile suspended solids (VSS) increased from 1300 to 2500 mg/L.
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Affiliation(s)
- R B Vieira
- Faculdade de Engenharia Química, Universidade Federal de Uberlândia, Campus Santa Mônica, 2121, CEP: 38400-902, Uberlândia, MG, Brazil.
| | - P A Vieira
- Faculdade de Engenharia Química, Universidade Federal de Uberlândia, Campus Santa Mônica, 2121, CEP: 38400-902, Uberlândia, MG, Brazil.
| | - E J Ribeiro
- Faculdade de Engenharia Química, Universidade Federal de Uberlândia, Campus Santa Mônica, 2121, CEP: 38400-902, Uberlândia, MG, Brazil.
| | - V L Cardoso
- Faculdade de Engenharia Química, Universidade Federal de Uberlândia, Campus Santa Mônica, 2121, CEP: 38400-902, Uberlândia, MG, Brazil.
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Sayara T, Sarrà M, Sánchez A. Optimization and enhancement of soil bioremediation by composting using the experimental design technique. Biodegradation 2009; 21:345-56. [PMID: 19882357 DOI: 10.1007/s10532-009-9305-8] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2009] [Accepted: 10/21/2009] [Indexed: 11/26/2022]
Abstract
The objective of this study was the application of the experimental design technique to optimize the conditions for the bioremediation of contaminated soil by means of composting. A low-cost material such as compost from the Organic Fraction of Municipal Solid Waste as amendment and pyrene as model pollutant were used. The effect of three factors was considered: pollutant concentration (0.1-2 g/kg), soil:compost mixing ratio (1:0.5-1:2 w/w) and compost stability measured as respiration index (0.78, 2.69 and 4.52 mg O2 g(-1) Organic Matter h(-1)). Stable compost permitted to achieve an almost complete degradation of pyrene in a short time (10 days). Results indicated that compost stability is a key parameter to optimize PAHs biodegradation. A factor analysis indicated that the optimal conditions for bioremediation after 10, 20 and 30 days of process were (1.4, 0.78, 1:1.4), (1.4, 2.18. 1:1.3) and (1.3, 2.18, 1:1.3) for concentration (g/kg), compost stability (mg O2 g(-1) Organic Matter h(-1)) and soil:compost mixing ratio, respectively.
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Affiliation(s)
- Tahseen Sayara
- Department of Chemical Engineering, Escola Tècnica Superior d'Enginyeria, Edifici Q, Universitat Autònoma de Barcelona, Bellaterra, Cerdanyola, 08193, Barcelona, Spain
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13
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Vieira PA, Vieira RB, Faria S, Ribeiro EJ, Cardoso VL. Biodegradation of diesel oil and gasoline contaminated effluent employing intermittent aeration. JOURNAL OF HAZARDOUS MATERIALS 2009; 168:1366-1372. [PMID: 19356851 DOI: 10.1016/j.jhazmat.2009.03.023] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2008] [Revised: 12/27/2008] [Accepted: 03/09/2009] [Indexed: 05/27/2023]
Abstract
We examined the effects of aeration interval and agitation speed in an effort to optimize the biodegradation of effluent contaminated with diesel oil and gasoline. The biodegradation process employed a C(1) mixed culture and intermittent aeration. Optimization was performed using central composite design (CCD). The independent variables were aeration interval (X(1)) and agitation speed (X(2)) and the dependent variable was the degree of removal of total petroleum hydrocarbons (TPH). The optimum aeration interval (33h) and agitation speed (110rpm) resulted in TPH removal of 75.9% after 3 days. Five hydrocarbons classes were identified using gas chromatography: paraffins, isoparaffins, olefins, naphthenics, and aromatics. The following reductions were observed: 91.8% for the paraffins, 83.3% for the isoparaffins, 80.9% for the olefins, 39.3% for the naphthenics, and 80.9% for the aromatics. In comparative studies performed under constant aeration (CA), without aeration (WA), and intermittent aeration (IA) conditions, intermittent aeration resulted in the highest TPH removals, with 90% reduction after 22 days. Under the IA condition, the degradation percentages were 99.6% for the paraffins, 94% for the isoparaffins, 95.4% for the olefins, 70.8 for the naphthenics, and 83.4% for the aromatics.
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Affiliation(s)
- P A Vieira
- Faculdade de Engenharia Química, Universidade Federal de Uberlândia, CEP 38400-902, Uberlândia, MG, Brazil.
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