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| Number | Title | Issue Date |
| 7429329 | Hybrid chemical/mechanical dewatering method for sewage treatment plants A hybrid chemical/mechanical dewatering sewage treatment plant and method employing rapid sludge chemical dewatering technology in conjunction with slower conventional mechanical dewatering solids agglomeration and disposal methods to meet operating constraints and ... | 09/30/2008 |
| 7419605 | Method for treating metal-contaminated water and soil A method for removing metal contaminants from water uses lignin derivatives, such as lignosulfonates and kraft lignin, a coagulant, such as a metal salt, and a pH-increasing composition. The lignin derivative is dispersed in the contaminated water, the coagulant is ... | 09/02/2008 |
| 7419604 | Use of boron compounds to precipitate uranium from water A method is provided for removing uranium from water. The method includes the mixing of a boron reagent with water contaminated with uranyl dication ions, leading to removal of the uranium from that water. ... | 09/02/2008 |
| 7419602 | Selenium removal from water A process for removing selenium from a water stream, in particular a waste water stream, by: 1) the addition thereto of a ferric salt, followed by 2) the addition of a cupric salt and pH adjustment to a pH value in the range of from about 6.5 to about 8.0, thereby f... | 09/02/2008 |
| 7407588 | Method of using stable adsorber granules to remove pollutants from flowable media The present invention relates to stable adsorber granules which have a high mechanical stability, and also to the use thereof. ... | 08/05/2008 |
| 7404939 | Mercury removal sorbent A sorbent composition comprising a vanadium compound and a TiO2 support material is disclosed. Methods of making and using the composition to remove heavy metals or heavy metal containing compounds from a fluid stream are also provided. Such methods are p... | 07/29/2008 |
| 7399416 | Reactive filtration In one embodiment, a reactive filtration method includes continuously regenerating a reactive filter media while simultaneously filtering contaminants from fluid flowing through the filter media. In one embodiment, regenerating the reactive filter media comprises mi... | 07/15/2008 |
| 7393454 | Elimination of metal ions from aqueous effluents Method for the elimination of metal ions from aqueous media, such as zinc, lead, chrome, copper, iron, aluminium, manganese, cadmium, cerium or silver and mixtures of the metals present in a trace or ultratrace state in aqueous effluents, by adsorption on a solid ch... | 07/01/2008 |
| 7390416 | Method for the removal of metals, including a co-precipitation of molybdenum, from wastewater An improved method to remove metals, including molybdenum, from industrial wastewater, by chemical precipitation of the metals, followed by settling and dewatering of the precipitate. ... | 06/24/2008 |
| 7390414 | Regeneration of chemically treated zeolite Systems and methods are provided for the removal and disposal of arsenic from an aqueous medium. The systems and methods include the removal of arsenic from a source by contact with either a chemically treated natural or synthetic zeolite, for example a ferric-loade... | 06/24/2008 |
| 7361275 | Use of derivatized nanoparticles to minimize growth of micro-organisms in hot filled drinks A method and article for removing a selected metal-ion from a solution. The method included providing a container for holding a liquid, the container having an internal surface having a metal-ion sequestering agent provided on at least a portion of the internal surf... | 04/22/2008 |
| 7361283 | Extraction and treatment of heavy metals Contaminated waste streams or soil or sludge is subjected to a first treatment stage with an acid liquor at a pH below 2 and at a solids content from 5 to 30%; then the liquid and solid phases from the first treatment stage are separated; the solids from the first t... | 04/22/2008 |
| 7351343 | Copper metal recovery system The present invention generally relates to a copper metal recovery system, able to integrate with a waste treatment system of a circuit board manufacture plant, includes a stirring unit, a crystallization unit and a pressure filtering unit. More than 2 parts of weig... | 04/01/2008 |
| 7341667 | Process for reduction of inorganic contaminants from waste streams The invention relates to the use of used alumina to reduce the level of inorganic contaminants, such as mercury and arsenic, from waste fluid streams. The invention further provides a process for reducing the level of mercury or arsenic in fluid streams by contactin... | 03/11/2008 |
| 7335309 | Method for removing metal compounds from waste water A method for removing metal compounds from waste water comprising the steps of adjusting the pH of the water to from 5 to 12 and preferable 6 to 9; aerating the waste water; adding a flocculating agent to the water and allowing floccules including metal compounds to... | 02/26/2008 |
| 7329356 | Flocculating agent for clarifying the water of man-made static water bodies A method is described for clarifying man-made static water bodies in which polyaluminum silicate sulfate is added to the water of the water body. Superior flocculation is achieved through the use of polyaluminum silicate sulfate which results in cleaner and more aes... | 02/12/2008 |
| 7329357 | Method for removing fluorine from a fluorine-containing wastewater A method for removing fluorine from wastewater includes the steps of: adding a fluorine-reactive agent, that comprises a water-soluble sodium compound and a water-soluble aluminum compound, into the wastewater so as to form sodium ions and aluminum ions in the waste... | 02/12/2008 |
| 7326345 | Bioremediation method which is used to concentrate and eliminate radionuclides in radioactive water A method for concentrating and eliminating radionuclides from water from in nuclear pools based on the capacity of microorganisms when they are growing to retain radionuclides by forming biofilms on the colonized surfaces. The method of the invention utilizes the co... | 02/05/2008 |
| 7314569 | Treatment of arsenic-contaminated water using akaganeite adsorption The present invention comprises a method and composition using akaganeite, an iron oxide, as an ion adsorption medium for the removal of arsenic from water and affixing it onto carrier media so that it can be used in filtration systems. ... | 01/01/2008 |
| 7311840 | Inorganic ion exchangers for removing contaminant metal ions from liquid streams The invention relates to processes and compositions for at least partially removing cations of one or more metals selected from the group consisting of caesium, strontium, lead, silver, transition metals, lanthanides and actinides from a liquid containing the cation... | 12/25/2007 |
| 7309437 | Compositions and methods for removal of toxic metals and radionuclides The present invention relates to compositions and methods for the removal of toxic metals or radionuclides from source materials. Toxic metals may be removed from source materials using a clay, such as attapulgite or highly cationic bentonite, and chitin or chitosan... | 12/18/2007 |
| 7309425 | Apparatus for the preparation of arsenic free water The present invention relates to a process for the preparation of arsenic free water and an apparatus therefor. The present invention also relates to a porous ceramic useful for pressure filtration in order to produce arsenic free water. The present invention partic... | 12/18/2007 |
| 7294275 | Method of removing phosphorus from wastewater A method of and system for removing phosphorus from wastewater using a waste sludge that has a high affinity for phosphorus. So the waste sludge can be used in a flow-through contact reactor to remove the phosphorus from a wastewater stream, the waste sludge is pell... | 11/13/2007 |
| 7288170 | Process for producing a ready-to-use electrolyte A process is intended to allow simple and particularly reliable electrolyte generation and conditioning from metal-containing used electrolytes and/or used process solutions and/or pulverulent metal wastes. For this purpose, waste products containing metal ions from... | 10/30/2007 |
| 7285222 | Method for recycling sludge during waste-water treatment A method for recycling sludge during waste-water treatment firstly utilizes a process of chemical coagulation to produce sludge rich in copper ions. The sludge is then leached in a sulfuric acid storage tank with sulfuric acid of concentration 1-2N, whereby a extrac... | 10/23/2007 |
| 7282152 | Selenium removal method The present invention provides a method for removing selenium from an aqueous stream by passing the aqueous stream, in combination with a quaternary amine compound, through a filter and recovering a treated aqueous stream which is depleted in selenium content relati... | 10/16/2007 |
| 7279103 | Process for the purification of acidic metal-bearing waste waters to permissible discharge levels with recovery of marketable metal products Acidic metal-bearing wastewaters are treated to produce a finished water of sufficient purity to meet discharge standards while recovering metals removed in forms which are commercially valuable. The metals are selectively precipitated, either in a batch or in a con... | 10/09/2007 |
| 7273552 | Bioremediation Bioremediatory fungi, such as Trichoderma harzianum, which have been found to catabolise cyanide, are capable of detoxifying contaminated environmental areas in association with a suitable rhizosphere. ... | 09/25/2007 |
| 7273556 | Method for treating water containing manganese The invention concerns a method for treating water for human consumption, so as to eliminate manganese and possibly other metals comprising steps which consist in: causing said water to pass at least over a bed of filtering material (3) consisting at least pa... | 09/25/2007 |
| 7267777 | Method for the removal of contaminant metal ions from waste water Method for removal of heavy metal ions from aqueous wastes, which are produced during electroplating and other industrial processes. The method comprises a precipitation process that is conducted in a magnetic field. ... | 09/11/2007 |
| 7267776 | Foams for removing pollutants and/or heavy metals from flowable media The present invention relates to a method of using foam to remove pollutants and/or heavy metals from a flowable media. The method may include providing a foam that may include cavities wherein the cavities may include an adsorbent composition of iron oxyhydroxy gra... | 09/11/2007 |
| 7264733 | Method for treating heavy-metal-containing wastewater using sulfidizing agent A method and apparatus for treating heavy-metal-containing wastewater using a sulfidizing agent. Sulfidizing treatment is carried out by adding a sulfidizing agent to heavy-metal-containing wastewater, while detecting hydrogen sulfide gas generated from the wastewat... | 09/04/2007 |
| 7261820 | Method for decreasing a concentration of metal in aqueous solution A method and system for decreasing the concentration of at least one metal in an aqueous solution. The metal may be molybdenum, tungsten, or both. An aqueous solution is introduced into at least one reaction zone, and at least one source of hydroxide ions is provide... | 08/28/2007 |
| 7255793 | Methods for removing heavy metals from water using chemical precipitation and field separation methods A two-step chemical precipitation process involving hydroxide precipitation and sulfide precipitation combined with “field separation ” technology such as magnetic separation, dissolved air flotation, vortex separation, or expanded plastics flotation, effectivel... | 08/14/2007 |
| 7255795 | Process for selectively removing molybdenum from liquid mixtures containing it together with vanadium Process for selectively removing molybdenum from liquid mixtures containing it, in a quantity greater than (200) mg/l, together with vanadium characterized in that it comprises the following steps: bringing the liquid mixture to a pH of less than (3); adding a solut... | 08/14/2007 |
| 7252768 | Method for eliminating metal halides that are present in a liquid or gaseous, organic or non-organic effluent The invention relates to a method for eliminating metal halides which are present in a liquid or gaseous, organic or non-organic effluent. According to the invention, the elimination is carried out by absorption of said metal halides on alumina agglomerates. The inv... | 08/07/2007 |
| 7250067 | Gas and odour treatment The present invention relates to a product for, and a method of, treating gases, fumes and vapors with fragments of crustacean shell so as to extract one or more components/pollutants from the gases. ... | 07/31/2007 |
| 7244363 | Methods for treating heavy halide brines with permanganates The present invention relates to the use of permanganate in the removal of heavy metal contaminants from heavy halide brines. In some embodiments, the present invention discloses methods of treating heavy halide brines that comprise providing a heavy halide brine th... | 07/17/2007 |
| 7238288 | Method for absorbing an ion from a fluid A method for absorbing an ion from a fluid by using dispersing an organic acid into an anion surfactant solution, mixing in a divalent-metal containing compound and a trivalent-metal containing compound and calcining the resulting solid layered double hydroxide prod... | 07/03/2007 |
| 7232554 | Process for recovering arsenic from acidic aqueous solution A process for the recovery of arsenic trioxide from acid solutions, particularly the aqueous acid effluent produced by a gas-washing process in the pyrometallurgy of copper sulfide ores is provided. Generally, the process comprises concentrating the acid solution in... | 06/19/2007 |
