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5155042 |
Bioremediation of chromium (VI) contaminated solid residues
Chromium in solid waste residues may be immobilized by reduction of essentially all of the Cr(VI) to insoluble Cr(III). The Cr(VI) is separated from the solids by contacting with an acid to produce...
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5124039 |
Process for biological treatment of dissolved nitrates
This invention relates to a process for biologically converting dissolved nitrates into nitrogen, for instance for the denitrification of waste waters by microorganisms with the use of a liquified...
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5116506 |
Support aerated biofilm reactor
A gas permeable membrane divides a reactor vessel into a liquid compartment and a gas compartment. A biofilm is grown on the gas permeable membrane on the liquid side of the membrane. Teh gas...
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5100553 |
Method for treating organic waste by methane fermentation
Proliferation activity of methane bacteria in organic waste water can be improved by maintaining the ratio of the amounts of nickel, iron and cobalt contained in the waste water to the BOD thereof...
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5094868 |
Process for removal of agricultural chemicals from seed kernels
A process for the removal of agricultural chemicals from seed grain kernels. The process includes removal of chemicals adsorbed to the surface of the seed by abrasion and removal of chemicals...
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5083610 |
Recovery of oil from oil reservoirs
This invention relates to a process for recovery of oil from oil reservoirs with assistance from microorganisms. More particularly, the present invention contemplates a method for recovering oil...
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5078882 |
Bioconversion reactor and system
The invention relates to an apparatus and process useful for the biological transformation of waste materials into ecologically desirable materials. A meta system reactor is disclosed comprising...
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5076927 |
Biocatalyzed partial demineralization of acidic metal sulfate solutions
This invention comprises the steps of (1) acid phase anaerobic digestion of biomass to produce volatile acids and a stabilized sludge, (2) use of the volatile acids as the carbon source and...
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5075008 |
Process for high-load treatment of carbohydrate containing waste water
A process for high-load treatment of carbohydrate-containing waste water comprises the steps of separating a yeast appearing in the waste water, subjecting the separated yeast to large-quantity...
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5071559 |
Treatment of manure condensate
The invention relates to a method for processing manure, comprising the steps of: i) adding an organic carrier liquid to the manure; ii) concentrating the mixture of manure and carrier...
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5069787 |
Method and apparatus for removing cyanide from a fluid
A system for removing cyanide and related species from a cyanide-containing waste fluid, for example, of the sort generated by mining operations, includes means for generating hydrogen peroxide by...
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5057221 |
Aerobic biological dehalogenation reactor
Methylotrophic and heterotrophic microorganisms are supported on a rigid substrate bed. Oxygen, such as from air, and a low-molecular-weight alkane, such as methane, flow through the bed. Organic...
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5037551 |
High-flow rate capacity aerobic biological dehalogenation reactor
A method and apparatus are disclosed for dehalogenating and further biodegrading organic compounds, including halogenated organic compounds, present in an aqueous mixture, the mixture comprising...
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5019265 |
Process for activating the operation of a system for anaerobic digestion of solid organic residues
Product for activating the operation of a system for anaerobic digestion of organic residues and especially of a septic tank or similar while being placed in this system and especially the septic...
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5018576 |
Process for in situ decontamination of subsurface soil and groundwater
A method is provided for in situ decontamination of contaminated subsurface area by injection of steam into injection wells and withdrawing liquids and vapors from extraction wells under...
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5017289 |
Process for in situ biodegradation of hydrocarbon contaminated soil
The present invention is a process for in situ biodegradation of spilled hydrocarbons. The process involves drawing oxygen into a hydrocarbon contaminated zone. A borehole is drilled into the...
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5015385 |
Process for promotion of microbial consumption of waste water fats
The composition of stable microbial mixed biocenoses can be controlled by the addition of growth factors and/or inhibitory substances, optionally together with certain nutrients. It is possible in...
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5006250 |
Pulsing of electron donor and electron acceptor for enhanced biotransformation of chemicals
The present invention is directed to a method for purifying an underground water supply containing halogenated aliphatic compounds by in-situ biodegradation of said compounds, comprising injecting...
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4999300 |
Bacterial degradation of 4-chlorobiphenyl
A novel strain of Pseudomonas capable of utilizing 4-chlorobiphenyl as sole carbon and energy source is disclosed. The bacterium identified as Pseudomonas MB86 is shown to degrade 4-chlorobiphenyl...
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4992174 |
Fixed bed bioreactor remediation system
Disclosed is an apparatus and method for the continuous bioremediation of sites contaminated with a hazardous substance. The apparatus includes a subsurface pumping system, for removing the...
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4976864 |
Treatment of the effluents from the production of epoxy resins
Process for the treatment of aqueous effluents from the production of epoxy resins, which effluents contain as their main impurities chlorohydrins, glycidol, isopropyl alcohol and sodium chloride,...
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4975193 |
Method for removing cyanide from a fluid
A system for removing cyanide and related species from a cyanide-containing waste fluid, for example, of the sort generated by mining operations, includes means for generating hydrogen peroxide by...
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4968427 |
Process for the biological degradation of complex, non-readily degradable organic wastewater constituents
In a two-stage process for the biological degradation of complex, non-readily degradable wastewater constituents, acidification takes place in the first stage and anaerobic degradation in the...
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4956092 |
Method for concentrating/dehydrating of sewage sludge
In the method for concentrating/dehydrating sewage sludge including activated sludge with the aid of organic polyelectrolytes and/or inorganic flocculators the activated sludge portion is produced...
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4954258 |
Microbiological degradation of halogenated hydrocarbons in water
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.
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4952315 |
Method, system and emulsifier substance for treatment of materials containing harmful substances
The invention concerns a method for treatment of solid and fluid materials contaminated by at least predominantly lipophilic harmful substances, in particular hydrocarbons and the like, especially...
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4940544 |
Decentral wastewater treatment process
A process for the treatment of wastewaters heavily polluted by fats, proteins and/or carbohydrates of vegetable or animal origin or their processing products by degradation by microorganisms in a...
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4925802 |
Method for stimulating biodegradation of halogenated aliphatic hydrocarbons
A method of biodegrading halogenated alipahtic hydrocarbons is disclosed comprising incubating the hydrocarbons with microorganisms capable of degrading halogenated aliphatic hydrocarbons together...
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4919813 |
Photoenhanced anaerobic digestion of organic acids
A process is described for rapid conversion of organic acids and alcohols anaerobic digesters into hydrogen and carbon dioxide, the optimal precursor substrates for production of methane. The...
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4911843 |
Process for removal of dissolved hydrogen sulfide and reduction of sewage BOD in sewer or other waste systems
Removal of dissolved hydrogen sulfide and a reduction in BOD is achieved by the addition of nitrate ions to waste systems in an amount sufficient to stimulate growth of bacteria which utilize...
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4891136 |
Method for controlling filamentous organisms in wastewater treatment processes
Methods for controlling sludge bulking in aerobic waste treatment processes are presented in which nitrogen metabolism is controlled and a steady seed of facultative nonfilamentous bacteria is...
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4885094 |
Anaerobic digestion process, and forced fed fast rate digester
An anaerobic process for the digestion of organic wastes, and novel anaerobic digester. In digestion of the organic wastes in the presence of anaerobic microorganisms, at anaerobic conditions, the...
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4882059 |
Solubilization of organic materials in wastewater treatment
A method for solubilizing particulate or colloidal materials in wastewater treatment comprising the steps of cultivating aerobic bacteria in the presence of oxygen in an activator solution...
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4861519 |
Method for volume reduction of low activity organic wastes from nuclear power plants by anaerobic decomposition
The invention relates to a method and apparatus for the reduction in the quantity of low activity organic wastes from nuclear power plants. This is accomplished using anaerobic fermentation in a...
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4843105 |
Process for the preparation of filler-containing, antionically modified polyurethane (urea) compositions, the polyurethane (urea) compositions so-obtained, and the use thereof
The invention is directed to the formation of filler containing anionically modified polyurethane (urea) compositions by reacting suitable polyurethane (urea) forming ingredients in the presence of...
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4826601 |
Sewage treatment method
A method of treating sewage is disclosed that is particularly suitable for one or a small group of residential dwellings in environmentally sensitive areas. The raw sewage is flowed first into an...
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4818407 |
Nitrification with ammonia enrichment
A process is disclosed to improve the efficiency of nitrification in activated sludge systems. Supplemental ammonium nitrogen in the form of anhydrous ammonia or an aqueous solution of ammonia is...
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4816158 |
Method for treating waste water from a catalytic cracking unit
A method for treating waste water from a catalytic petroleum cracking unit is disclosed. The method includes receiving step, aeration step, settling step, and a discharging step. In the receiving...
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4812237 |
Water recycle system
A closed water purification and recycle system processes domestic wastewater to produce potable water for cooking, drinking and dishwashing and water suitable for general household use, such as...
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4810385 |
Device for seeding bacterial cultures to systems to assist in biodegrading waste
A device suitable for seeding bacterial cultures to waste flowing through or which has accumulated in a collection system which comprises a porous outer covering member which forms an enclosed...
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4767537 |
Dewatering of sludge using nitrate
Process and apparatus for thickening or dewatering treated sludge in one or more thickening tanks includes the addition of nitrate ions to treated sludge as a mechanism for generating microscopic...
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4749491 |
Microbiological decomposition of chlorinated aliphatic hydrocarbons
An aerobic method for in situ treatment of water and soil which has been contaminated with chlorinated hydrocarbons. The aerobic method involves feeding an aqueous solution of an oxygen source and...
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4746434 |
Process for treating sour water in oil refineries
Sour process water from an oil refinery is partially treated by oil extraction. The partially treated water can be biologically treated, upgraded and further purified in a cooling tower, trickle...
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4732680 |
Biochemical conversion processes
The present invention is directed to a method of chemical addition to a microbial population to condition the population to (i) enhance bioconversion or biodegradation of a given substrate, or (ii)...
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4715958 |
Process and means for conducting the denitrification of water
In a denitrification process wherein denitrifying agents are supported on a carrier material, the invention comprises conducting denitrification in the presence of a carrier impregnated with an...
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4705633 |
Nitrification with sludge reaeration and ammonia enrichment
A nitrification process is disclosed wherein the population of the nitrifying bacteria in an activated sludge system may be increased by the addition of ammonium nitrogen to a return sludge...
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4698158 |
Process for treating industrial wastewaters by activated sludge
A process for activated sludge treatment of industrial wastewaters which uses, in the aeration tank of an activated sludge treatment plant, at least one member of the group consisting of phytic...
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4693827 |
Process for protection of biological nitrification systems
A method for accelerating the startup of biological nitrification systems for wastewater treatment and preventing or reducing the effects of toxic or inhibitory materials or excursions of pH,...
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4683064 |
Process for decreasing the nitrate content in water
The invention relates to a process for decreasing the content of nitrate in ground water, artificial ground water, that is infiltrated surface water, or surface water flowing through an aquifer or...
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4671879 |
Process for reducing the nitrate content in water
The present invention provides a process for reducing the nitrate content in water, wherein water containing nitrate is contacted with an anion exchanger containing chloride and/or bicarbonate ions...
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