biodegradation and bioremediation of lnapls and dnapls

... phenomenon of solid washout On the other hand, water bath system was provided to control the temperature of R3 in mesophilic range of 37±1°C On the opposite side, the operation temperature of R1 and ... one comparison R1, R2, and R3 Cylindrical outline of Perspex were the reactors made of, whereby each reactor was fabricated as per the guidelines given by Lettinga and Hulshoff, considering that ... diameter and total height of 10 cm, and 100 cm respectively Furthermore, this was providing a total volume of 7.85-l while the liquid volume was found to be 7.22-l in depth In addition of placing...

Ngày tải lên: 05/09/2013, 16:11

... 0.94 and 1.5 for A12, B13, E15 and D14 respectively Optimization of pH At optimal temperature condition of strains and after 24 hour of incubation, the results indicated that the activity of lipid ... degradation of strain D14 was at pH 7.5 while the others were at pH The lipase activity of D14 was 0.97, and that of A12, B13 and E15 were 1.66, 1.43 and 1.51 respectively Optimization of FOG concentration ... milling, drying and sterile at 121oC for 15 minutes, 0.4% w/v of CF-18 and 0.2 %w/v of PVA were added to mixed starter Mixed solution was incubated and dried to 10% of moisture Table Effect of concentration...

Ngày tải lên: 22/03/2014, 09:20

... the  isolation  and evaluation  of petroleum  degrading  microorganisms  and discusses  the  main  variables  affecting  bioremediation of aqueous  (marine,  river)  and land  sites  contaminated  ... fields  and on  discussion  of current  research  and development  conducted  directly  by  the  authors  and co‐authors  of some  of the  chapters. The main objective is to provide state of the art information on the emerging  ... (EOR) Processes and Bioremediation of Oil-Contaminated Sites steamflooding and in-situ combustion, however several of these newly proposed methods at early stages of evaluation and are not expected...

Ngày tải lên: 27/06/2014, 00:20

... the  isolation  and evaluation  of petroleum  degrading  microorganisms  and discusses  the  main  variables  affecting  bioremediation of aqueous  (marine,  river)  and land  sites  contaminated  ... fields  and on  discussion  of current  research  and development  conducted  directly  by  the  authors  and co‐authors  of some  of the  chapters. The main objective is to provide state of the art information on the emerging  ... (EOR) Processes and Bioremediation of Oil-Contaminated Sites steamflooding and in-situ combustion, however several of these newly proposed methods at early stages of evaluation and are not expected...

Ngày tải lên: 27/06/2014, 00:20

... BIOREMEDIATION OF AQUATIC AND TERRESTRIAL ECOSYSTEMS BIOREMEDIATION OF AQUATIC AND TERRESTRIAL ECOSYSTEMS Editors Milton Fingerman Rachakonda Nagabhushanam Department of Ecology and Evolutionary ... Guidance for the Bioremediation of Oil-Contaminated Wetlands, Marshes, and Marine Shorelines Albert D Venosa and Xueqing Zhu 141 Bioremediation of Petroleum Contamination Ismail M.K Saadoun and Ziad ... Techniques of Xenobiotic-Degrading Bacteria and Their Catabolic Genes in Bioremediation K Inoue, J Widada, T Omori and H Nojiri Genetic Engineering of Bacteria and Their Potential for Bioremediation...

Ngày tải lên: 16/03/2014, 18:10

... Engineering and Science, Hazardous Waste Management and Design, and Physiochemical Processes and Treatment of Pollutants Professor Talley is noted for his innovative applications of thermal programmed ... understanding of sequestration and bioavailability of recalcitrant compounds in soils and sediments Such research could result in providing guidelines for the assessment and prediction of the ... July 5, 2005 3:21 PM Bioremediation of Recalcitrant Compounds remediation (NCR, 1994; Moore et al., 1989) and is challenging our concepts about cleanup standards and risks (Alexander, 1995) This...

Ngày tải lên: 11/08/2014, 17:21

... understanding of the bioavailability of PAHs in sediment Environ Sci Technol 36: 477–483 Tang, J., Carroquino, M.J., Robertson, B.K., and Alexander, M 1998 Combined effect of sequestration and bioremediation ... Effects of rate-limited desorption on the feasibility of in situ bioremediation Water Resour Res 30: 2413–2422 Garbarini, D.R and Lion, L.W 1986 Influence of the nature of soil organics on sorption of ... biomass McFarland (1984) synthesized information from Karickhoff and Könemann and van Leeuwen and derived a relationship for TBP (McFarland and Clarke, 1986): TBP = AF(CS/fOC)fL where AF = accumulation...

Ngày tải lên: 11/08/2014, 17:21

... following: the impact of spatial heterogeneity on bioremediation of the site, the effects of advective-dispersive transport on the rate of biodegradation at the site, and the ability of an engineered ... reactions and often prevents the growth of new biomass needed to stimulate rapid contaminant removal The degree and mechanisms of toxicity vary with specific toxicants, their concentration, and the ... specific aspects of a process (i.e., ascertaining rates of degradation) Individual parameters (i.e., concentration and type of contaminant, species of microorganism, etc.) are controlled and varied...

Ngày tải lên: 11/08/2014, 17:21

... costs of disposing of the stabilized soil Bioremediation of PCBs is effective and offers lower energy and operations costs than other technologies, but it may take longer to remediate the soil, and ... Corps of Engineers, 1996) Methods were developed and refined to monitor the progress and effectiveness of bioremediation These included molecular biological techniques to monitor the presence of ... cometabolism of PCBs to chlorobenzoates, and the dechlorination and mineralization of chlorobenzoates, as a growth substrate Microbiological, biochemical, and physiological characterization of the...

Ngày tải lên: 11/08/2014, 17:21

... survivability of the recombinant PCB-growing organisms RHA1(fcb) and LB400(ohb) and their impact on PCBs in soil microcosms • Evaluate the effect of FeSO4 and FeS on the fate and activity of the recombinant ... simulate PCB desorption and biodegradation in the presence and absence of surfactants • Validate the design and strategy for two-phase anaerobic–aerobic bioremediation of PCB-contaminated soils ... Enhancing PCB bioremediation 155 • Evaluate the effects of different solids’ loading rates (i.e., water contents) on the application of amendments and GEMs and the bioremediation of PCBs • Determine...

Ngày tải lên: 11/08/2014, 17:21

... relevant to biodegradation and bioavailability are the location and density of microorganisms The majority of bacteria in the environment are attached to surfaces, and their distribution in and on ... sorption and sequestration of PAHs on soils not provide a basic understanding of the bioavailability of recalcitrant PAHs They also lack information to aid interpretation of results of ecotoxicological ... number of rings and added the mixtures to soil in both slurry and solid treatments Group consisted of two-ring PAHs (naphthylene, methyl and dimethyl naphthalenes, and biphenyl) Group consisted of...

Ngày tải lên: 11/08/2014, 17:21

... Bioremediation of Recalcitrant Compounds necessary to develop a better understanding of methods of delivery of the microorganisms in the desired locations Our understanding of the movement and survival of ... issue of residual contamination is still unresolved in the case of biological treatment of PAHs, where an understanding of the complex interactions between hydrophobic organic contaminants and ... soil The exudate is composed of simple sugars, amino acids, enzymes, aliphatic and aromatic compounds, and vitamins and has been shown to increase the dissipation of soil-bound PAHs when applied...

Ngày tải lên: 11/08/2014, 17:21

... Principle of Bioremediation 2.1.1 Modes of Microbial Metabolism 2.1.2 Mechanisms of Petroleum Hydrocarbon Biodegradation 2.1.2.1 Microbial degradation of alkanes 2.1.2.2 Microbial degradation of cyclic ... Concentration of Nutrients in Sediment Leachate 7.3.3 Biodegradation of Total Straight Chain Alkanes (C10 – C33) 7.3.4 Biodegradation of Pristane and Phytane 7.4 Concluding Remarks APPLICATION OF A SLOW-RELEASE ... 10.3.3 Hydrocarbon Losses 10.3.3.1 Biodegradation of n-alkanes 10.3.3.2 Biodegradation of branched alkanes 10.3.3.3 Loss of total target PAHs 10.3.3.1 Biodegradation of total target PAHs with individual...

Ngày tải lên: 12/09/2015, 09:10

... TergitolNP-9 at concentrations of 0.2, 0.4 and 0.8g/L slightly enhanced the biodegradation and leaching losses of aliphatic (i.e straight and branched alkanes) and PAHs (i.e 4-ring and 5-ring) in the sediments ... of biodegradation (Atlas and Bartha, 1972b; Walker and Colwell, 1974; Atlas, 1975) Besides, decreasing of temperature decreases the rate of 12 Chapter enzymatic activity, and solidification of ... microcosms of “wetlab” (Top view) 161 Figure C.2 Photograph of drainage valves and pipes 161 Figure C.3 Photograph of “wetlab” (Front view) 162 xx List of Tables LIST OF TABLES Table 2.1 Bioremediation...

Ngày tải lên: 02/10/2015, 12:55

... system capable of providing high expression of metallothionein and polyphosphate kinase to promote effective mercury bioremediation We also compared the bioremediation efficiency of transgenic ... metallothionien and polyphosphate kinase to understand which of these genes is best suited for mercury bioremediation Finally, we characterized the bioremediation efficiency of the metallothionein-expressing ... of metallothionein in bacteria included: rapid degradation of the transcripts and small peptide, low protein expression, and interference with redox pathways [10,11] Despite the high levels of...

Ngày tải lên: 23/03/2014, 22:20

... microbial consumption of oxygen or nitrate that was supported by the electron acceptor demand of materials in the landfill leachate Consequently, the rate of supply of oxygen and nitrate into impacted ... summarizing field and laboratory studies on anaerobic biodegradation of organic compounds The report entitled “Anaerobic Biodegradation of Organic Chemicals in Groundwater: A Summary of Field and Laboratory ... health of humans and the environment Under the Resource Conservation and Recovery Act (RCRA) of 1976 the U.S EPA is appointed the task of managing these risks through the development and implementation...

Ngày tải lên: 28/03/2014, 19:20

... potential, concentration, the presence/absence of electron acceptors and donors, and effects, both synergistic and antagonistic, of associated microflora (Howard and Banerjee, 1984) Lag periods were established ... availability and concentration of the substrate The Monod equation was developed to describe the growth of a population of microbes in the presence of a carbon source At low concentrations of substrate, ... used as a convenient approximation of the kinetics of degradation of test substrates where there is no growth of the microbial population and a low concentration of the test substrate is present...

Ngày tải lên: 28/03/2014, 19:20

... (Heuer, et al., 2010, 120 days of biodegradation) and CO2 (270 days of biodegradation) but no methane, indicating the presence of acetogenic bacteria and the absence of methanogenic archaea in the ... degraded n-alkanes and isoprenoids (biodegradation rates of 36 to 99 % in 60 days), with decreasing ratios of pristane (Pr)/ 10 phytane (Ph), increasing ratios of Pr/nC17 and Ph/nC18, and an even-to-odd ... sensor and with a regulated atmosphere of nitrogen (80 %) and carbon dioxide (20 %) was used in the preparation and incubation of the anaerobic and mixed microorganism consortium Each consortium biodegradation...

Ngày tải lên: 20/06/2014, 21:20

Ngày tải lên: 13/11/2014, 16:00