Bioslurry phase degradation of di-ethyl phthalate (DEP) contaminated soil in periodic discontinuous mode operation: Influence of bioaugmentation and substrate partition

Mohan, S. Venkata; Shailaja, S.; Krishna, M. Rama; Reddy, K. N.; Sarma, P.N.

doi:10.1016/j.procbio.2005.08.018

Cited by 47 publications

(8 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Mohan et al [ 22 ] studied the degradation of a di-ethyl phthalate (DEP) contaminated soil in a sequencing A-SB; the effect of bioaugmentation using effluent treatment plant (ETP) microflora on the degradation of DEP was also investigated. Consistent desorption of DEP was observed in the aqueous phase with increase in the contact time (cycle period) due to prevailing agitation in the reactor.…”

Section: Applications Of Aerobic Slurry Bioreactors To Bioremediatmentioning

confidence: 99%

“…Slurry bioreactors are one of the most important types of ad situ and ex situ technique. Treatment of soils and sediments in slurry bioreactors has become one of the best options for the bioremediation of soils polluted by recalcitrant pollutants under controlled environmental conditions [ 17 , 21 , 22 ]. SBs are also very often applied to determine the feasibility and actual potential of a biological strategy in the final restoration of a contaminated soil or site [ 8 , 11 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A review on slurry bioreactors for bioremediation of soils and sediments

2008

View full text Add to dashboard Cite

The aim of this work is to present a critical review on slurry bioreactors (SB) and their application to bioremediation of soils and sediments polluted with recalcitrant and toxic compounds. The scope of the review encompasses the following subjects: (i) process fundamentals of SB and analysis of advantages and disadvantages; (ii) the most recent applications of SB to laboratory scale and commercial scale soil bioremediation, with a focus on pesticides, explosives, polynuclear aromatic hydrocarbons, and chlorinated organic pollutants; (iii) trends on the use of surfactants to improve availability of contaminants and supplementation with degradable carbon sources to enhance cometabolism of pollutants; (iv) recent findings on the utilization of electron acceptors other than oxygen; (v) bioaugmentation and advances made on characterization of microbial communities of SB; (vi) developments on ecotoxicity assays aimed at evaluating bioremediation efficiency of the process.From this review it can be concluded that SB is an effective ad situ and ex situ technology that can be used for bioremediation of problematic sites, such as those characterized by soils with high contents of clay and organic matter, by pollutants that are recalcitrant, toxic, and display hysteretic behavior, or when bioremediation should be accomplished in short times under the pressure and monitoring of environmental agencies and regulators. SB technology allows for the convenient manipulation and control of several environmental parameters that could lead to enhanced and faster treatment of polluted soils: nutrient N, P and organic carbon source (biostimulation), inocula (bioaugmentation), increased availability of pollutants by use of surfactants or inducing biosurfactant production inside the SB, etc. An interesting emerging area is the use of SB with simultaneous electron acceptors, which has demonstrated its usefulness for the bioremediation of soils polluted with hydrocarbons and some organochlorinated compounds. Characterization studies of microbial communities of SB are still in the early stages, in spite of their significance for improving reactor operation and design optimization.We have identified the following niches of research needs for SB in the near and mid term future, inter alia: (i) application of SB with sequential and simultaneous electron acceptors to soils polluted with contaminants other than hydrocarbons (i.e., pesticides, explosives, etc.), (ii) evaluation of the technical feasibility of triphasic SB that use innocuous solvents to help desorbing pollutants strongly attached to soils, and in turn, to enhance their biodegradation, (iii) gaining deeper insight of microbial communities present in SB with the intensified application of molecular biology tools such as PCR-DGGE, PCR-TGGE, ARDRA, etc., (iv) development of more representative ecotoxicological assays to better assess the effectiveness of a given bioremediation process.

show abstract

Section: Applications Of Aerobic Slurry Bioreactors To Bioremediatmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A review on slurry bioreactors for bioremediation of soils and sediments

2008

View full text Add to dashboard Cite

show abstract

“…As the accumulation of PAEs in the environment has become a serious problem nowadays, it is very urgent to develop an effective method to remove and treat these contaminants. Traditional treatment processes, such as biological treatments are not effective for the degradation of PAEs [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Degradation mechanism of diethyl phthalate with electrogenerated hydroxyl radical on a Pd/C gas-diffusion electrode

Wang

Sun

Bian

2010

Journal of Hazardous Materials

View full text Add to dashboard Cite

“…The t ½ of DEHP in the sediment was 14 days for the biodegradation process [135], while t ½ of DMP was estimated as 3.2 years in the aquatic environments [61]. By using a slurry-phase reactor bioaugmented with the outlet from an effluent treatment plant, the t ½ of DEP in soil was calculated as 1.19 days and 2.52 days in aqueous phase [136], whereas DBP degradation showed a t ½ of 0.75 days [137]. Phthalates are metabolized and eliminated within 48 h of exposure in vertebrates [138] and its biologic t ½ was 6-12 h [139].…”

Section: Half-life Of Phthalatesmentioning

confidence: 99%