A method and system for forming an in situ subsurface filter in a contaminated aquifer and for removing contaminants from groundwater drawn from a contaminated aquifer. The filter is produced in situ by injecting an aqueous solution comprising bacteria-stimulating chemical components through a well to bioactively generate a subsurface mineral filtering zone surrounding the well. As water is subsequently drawn through the well, contaminants are removed from the water as it passes through the filt...

In situ treatment of contaminated groundwater includes identifying a site contaminated with a pollutant susceptible to degradation by in situ, sulfate-reducing microorganisms. An amount of sulfate needed to support metabolization of the contaminants is estimated. The estimated amount of sulfate is applied to the site. In various alternatives of embodiments of the invention, the sulfate may be applied is a dry state or as a solution with water. The sulfate concentration in solution is in excess o...

A bioremediation system using inorganic oxide-reducing microbial consortia for the treatment of, inter alia coal mine and coal yard runoff uses a containment vessel for contaminated water and a second, floating phase for nutrients. Biodegradable oils are preferred nutrients.

There is disclosed a bio-enhancing composition comprising a carbohydrate and saponin, preferably comprising yucca extract, for the acceleration of bacterial metabolism. This particularly useful in the acceleration of bacterial metabolism in the breakdown of organic waste. There is also provided a method of stimulating microorganism metabolism and the use of the composition for such stimulation.

A method for purifying water or a water-containing material which comprises using a single or a few bacterial strains whose growth(s) is or are enabled or promoted by the addition of one or more of S-, N- and C- compounds under a low nutritional condition. A living bacterial preparation, useful for the purification of water or water-containing material, comprising a single or a few bacterial strains whose growth(s) is or are enabled or promoted by addition of one or more of S-, N- and C- compoun...

The present invention provides compositions and methods for controlling fecal odor production that develops from agricultural waste which accumulates because of the scale of hog and chicken farming. The compositions for controlling odor in waste comprise isolates of Pseudomonas sp. that assimilate ammonia, degrade skatole and reduce COD. The present invention further provides methods for controlling odors in animal waste storage facilities using the abovementioned Pseudomonas sp. compositions.

The invention discloses a biotechnological process for the treatment of hydroxide sludge containing As produced in potable water production processes which use FeCI.sub.3 as a coagulant. The process seeks to modify the physicochemical properties of the produced sludge in such a way to facilitate the use of mechanical dehydration methods that allow decreasing the sludge volume and facilitating its final disposal. The process entails: Preparation of an inoculum of sulfate reducing microorganisms f...

Disclosed herein is a method for treating odors in wastewater treatment bodies. The pH of the body is preferably established above about 6 and most preferably above about 7, usually by adding a base to the body. The oxidation reduction potential of the body is established at about -300 mV or higher and more preferably about -200 mV or higher, usually by adding an oxidizing agent such as oxygen or nitrates. After these conditions are established, sulfur oxidizing bacteria are added to the body. T...

Halogenated aliphatic hydrocarbons in water are degraded by methanotrophic bacteria in the presence of oxygen and at least one lower alkanol as a carbon source.

A process for in situ anaerobic bioremediation of contaminated earth media and solid waste media, including mining and chemical plant wastes, is shown. The process includes creating an emulsion of organic liquid dispersed in water, followed by infiltrating the emulsion into the media. Water, as the continuous emulsion phase, provides low viscosity and media wetting, favorable to infiltration. The emulsion disengages inside the media leaving dispersed organic nutrient attached to the media where ...