A review of bioremediation of contaminated soils and groundwater

Ritter, William F.; Scarborough, R. W.

doi:10.1080/10934529509376204

Cited by 27 publications

(23 citation statements)

References 16 publications

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“…It should be noted that the total proportion of oil removed (up to about 60%) is not especially high. A more active bioremediation treatment (for example, enhancing oxygen availability) might have resulted in degradation of a greater percentage of diesel (Ritter and Scarborough 1995). However, maximizing the extent of bioremediation was not one of the aims of this study.…”

Section: Ef®ciency Of Bioremediationmentioning

confidence: 99%

Microbial communities in different soil types do not converge after diesel contamination

2002

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Section: Ef®ciency Of Bioremediationmentioning

confidence: 99%

Microbial communities in different soil types do not converge after diesel contamination

2002

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“…5.5-8.6 (also suggested 6.5-8.5; Ritter, 1995) Sufficient nitrogen, phosphorus, and other nutrients for microbial growth (Suggested C:N:P ratio of 120: 10: 1) (also suggested 300: 15: 1; Ritter, 1995) 15-45 OC (also suggested 27 O C -35 'C; Ritter 1995) Water Well Sewage Water Release Figure 3. In-situ bioremediation of saturated and unsaturated zone.…”

Section: Discussionmentioning

confidence: 99%

“…Microorganisms responsible for biological degradation of contaminants have rates of reaction that are extremely sensitive to a number of different conditions, such as temperature, pH, oxygen, and nutrients (Rittmann 1993, Matthews 1994, and Ritter 1995. The most favorable conditions for bacteria feeding and digestion are pH values between 6.0 and 10.0, temperatures ranges of 25 O C to 35 O C and a ratio of organic carbon to nitrogen and phosphorus of 300: 151.…”

Section: Cshlsmentioning

confidence: 99%

“…Typical in-situ bioremediation systems for treatment of the vadose zone and the saturated zone are shown in Figures 3 and 4. Since the inception of the first process in the early 70s (Raymond 1974), in-situ bioremediation has undergone many evolutionary changes in its overall procedure, general design, and range of effectiveness (Rittmann 1993, Matthews 1994, and Ritter 1995.…”

Section: Introductionmentioning

confidence: 99%

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An evaluation of in-situ bioremediation processes

Cole¹,

Rashidi²

1996

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“…Bioremediation provides a potentially efficient way of breaking down pollutants into less toxic compounds through the metabolism of bacteria [Ritter and Scarborough, 1995;Wilson et al, 1986]. The role of chemotaxis (the ability of motile bacteria to swim towards regions of higher substrate concentration [Adler, 1966;Berg, 1975]) has rarely been addressed in bioremediation applications, with notable exceptions [Pandey and Jain, 2002;Phanikumar et al, 2002;Samanta et al, 2002;Parales and Haddock, 2004].…”

Section: Introductionmentioning

confidence: 99%

Lattice‐Boltzmann modeling of contaminant degradation by chemotactic bacteria: Exploring the formation and movement of bacterial bands

Long

Hilpert

2008

Water Resources Research

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[1] We developed a three-dimensional Lattice-Boltzmann (LB) model to simulate the biodegradation of a dissolved substrate, toward which bacteria exhibit chemotaxis. The model was verified by comparing simulations to capillary assay experiments performed elsewhere. In these assays, a capillary containing an aqueous solution, with initially uniformly distributed dissolved naphthalene, was dipped into a reservoir containing Pseudomonas putida, a microorganism that exhibits chemotaxis to naphthalene. These experiments were also performed with additional glass beads present in the capillary and reservoir. The simulations show that a fraction of the bacteria separates from the reservoir to form a band that moves with constant speed into the capillary while metabolizing the naphthalene. We also used the LB model to explore band formation in a porous medium under groundwater flow conditions. If a bacterial slug is injected, two bacterial bands form; one moves upstream and the other moves downstream. The magnitudes of the two band velocities, as measured relative to the pore water velocity, are identical. Bacteria injected in excess are advected downstream in a fluid parcel containing no substrate. Our simulations suggest that the bioremediation of a contaminant plume in groundwater can potentially be enhanced by the injection of chemotactic bacteria. We also derived a correlation that predicts the number of bacteria in a band that separates from a semi-infinite bacterial slug in a domain containing substrate that is initially uniformly distributed. This correlation allows estimation of the optimal number of bacteria that needs to be added to a substrate-filled domain, such that the number of bacteria in the band is maximum while simultaneously avoiding the injection of excess bacteria that do not make it into the band.

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A review of bioremediation of contaminated soils and groundwater

Cited by 27 publications

References 16 publications

Microbial communities in different soil types do not converge after diesel contamination

Microbial communities in different soil types do not converge after diesel contamination

An evaluation of in-situ bioremediation processes

Lattice‐Boltzmann modeling of contaminant degradation by chemotactic bacteria: Exploring the formation and movement of bacterial bands

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