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4193869 |
Wastewater and wastewater solid processing system
A system and method for processing wastewaters, domestic, industrial or otherwise, including producing a substantially sterile and recyclable organic material from the effluent wastewaters, and for...
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4189381 |
Waste water treatment
Waste water containing over 2 ppm Mo and at least one heavy metal impurity selected from the group consisting of Fe, Mn, Cu, Zn, Pb, and Cd, and also containing cyanide ion (CN) is treated by...
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4176058 |
Method means for de-silting water
The invention relates to a method and a means for de-silting water. The settling of silt in inland lakes and dams considerably reduce the effective life span of such lakes and dams, and also cause...
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4141691 |
Use of water soluble polymers in coal flotation circuits
Use of cationic water soluble polymers in coal flotation circuits to improve the recovery of clean coal and reduce the ash content.
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4132639 |
Method for improving the sedimentation and filterability of coal-derived liquids
An improvement in the separation of suspended solids from coal-derived liquids by a separations process in which solids size is a separations parameter is achieved by contacting the coal-derived...
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4124502 |
Process for the purification of greasy and soiled water using a heavy solvent, and apparatus for its implementation
A process for the purification of waste water containing grease and soil, especially the effluent from wool-soaking and wool-washing, which comprises mixing the waste water with a heavy solvent;...
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4108768 |
Method of clarifying industrial waste water
An industrial waste water containing hexane soluble impurities is adjusted in pH to a value of at least 11.6 and thereafter calcium chloride is added to that waste water in an amount of at least...
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4061568 |
Method for recovering and stabilizing fat and fatty substances as well as proteins and proteinous substances from process water
The invention according to the present patent application relates to a method for recovering substances from fat processing industry such as fat refining plants, margarine industry and other food...
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4057495 |
Method for treating a waste water containing a nonionic surface active agent
A method comprises in combination a step of effecting treatment by a foam separation method and a pressure/heating step for effecting treatment in the presence of an inorganic electrolyte, thereby...
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4040955 |
Method of treating wastewater containing emulsified oils
An improvement in the method of "breaking" emulsions of oil in water by the formation of an oil adsorbing floc in which floc is recycled from one batch of wastewater to subsequent batches during...
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4017391 |
Water treatment system
Chemical and aqueous components of sludge derived from lime treatments of raw water supplies are recovered by procedures involving carbonation of the sludges to effect a phase separation between...
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4007117 |
Methods of recovering wool grease from spent wool scouring liquor
Method of treating wool scouring liquor effluent to render it suitable for recycling or discharge and to concurrently recover wool grease as a by-product. The method comprises mixing scouring...
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4005009 |
Method of treating waste water containing surfactant and heavy metals
A method of treating a waste water containing anionic surfactant and heavy metals, which comprises the steps of: adding a specific inorganic coagulant and a specific salt to said waste water so as...
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4001114 |
Waste water treatment process
Waste water feed contaminated with fatty residue and a recycle of froth from a later stage of the process are acidulated; the resulting less dense oil phase is separated from the remaining denser...
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3944478 |
Electrolytic drainage treating apparatus
An electrolytic drainage treating apparatus is provided to treat a drainage containing a suspension of contaminated compound whereby the suspension is flocculated and removed by aluminum ions or...
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3940334 |
Method for separating oil from water
A method for separating oil from water, wherein, in order to simplify the treatment processes, to improve separation efficiency, and to make possible the recycling of added solvents, in the course...
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3926662 |
Production of cane sugar
A process for removing suspended solid impurities from sugar cane evaporated juice or sugar cane affination syrup comprises adding a soluble phosphate salt to said sugar to form therein an...
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3909287 |
Recovery of sugar from clarifier scum by countercurrent extraction
In the phosphatation-flotation process of sugar refining, sugar is recovered from the clarifier scum by a multi-stage reflotation process involving at least two consecutive stages of...
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3898159 |
Method for removing anionic surface active component from drainage
Anionic surface active components are separated from drainage or sewage streams by foam separation following reaction with a polyvalent metal ion. The polyvalent metal salt of surface active agent...
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3894948 |
Process for treating sewage sludge
Treating of sewage sludges with effective amounts of polyquaternary polymers obtained by interaction of a secondary amine, a difunctional epoxy compound, and a polyfunctional amine provide improved...
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3890226 |
Method of treating aluminum-containing waste water
A method of treating aluminum-containing waste water by neutralizing aluminum-containing alkaline waste water with acid water, wherein the neutralization reaction is carried out by adding the acid...
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3886070 |
Method for combatting pollution using a chromium complex
A process for anchoring a trivalent chromium complex, in which the chromium is co-ordinated to an acryclic carboxylic acid, to solid particles having a grain size of 1 to 600 microns by mixing 5 to...
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3816276 |
METHOD FOR THE TREATMENT OF WATER
Method for treating such water which contains metal ions, oils or suspended solids through a series of processes: the first process in which water containing metal ions, oils or suspended solids is...
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3816274 |
REMOVAL OF DISSOLVED OR SUSPENDED SOLIDS IN WASTE WATER
Waste water containing oil and water emulsions and dissolved or suspended solids is de-emulsified and clarified by creating a three dimensional anolyte stream resulting from the careful placement...
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3772191 |
METHOD OF DIGESTING AND FURTHER PROCESSING FRESH SEWAGE SLUDGE OR SOPROPEL
The method of treating sewage wherein the sludge is acidified with a mineral acid to a pH value just below 5 and then the pH value is adjusted to the isoelectrical range of the high molecular...
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3764013 |
APPARATUS FOR SEPARATING PAINT OR THE LIKE FROM WATER
A method and apparatus for separating paint or the like from water, especially for purifying the water before passing it into a lake, river or the like, by initimately mixing the paint-contaminated...
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3637490 |
FLOTATION OF SOLIDS FROM WASTE WATERS
In a method for the removal of waste solids from industrial and municipal waste water in flotation apparatus, the improvement comprising; blending into the waste water, prior to flotation, a...
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3617539 |
PROCESS FOR REMOVING CONTAMINANTS FROM WASTE-WATER
Contaminants in waste-water are removed by passing the waste-water through a biological treating zone, adding a coagulating agent to the effluent from this treating zone to coagulate into solids...
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3547800 |
APPARATUS AND METHOD FOR PURIFYING WASTE WATERS
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3510001 |
FLOTATION CHAMBER FOR CLEANING SEWAGE AND THE LIKE
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3502575 |
TREATING HOT WATER PROCESS DISCHARGE WATER BY FLOCCULATION AND VACUUM PRECOAT FILTRATION
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3497450 |
REMOVAL OF LIQUID CONTAMINANTS FROM THE SURFACE OF WATER
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3451788 |
METHOD OF SLIMES ELIMINATION IN POTASH ORE TREATMENT
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3446732 |
METHOD OF PURIFYING WASTE WATER
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3446488 |
GAS BUBBLE GENERATING AND DISTRIBUTING SYSTEM
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3434968 |
METHOD AND APPARATUS FOR CLARIFYING WATER
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3418236 |
Flotation method and apparatus
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3404088 |
Method for purifying water
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3375202 |
Separating substances in solution as salts by using a colloidal dispersion of mixed ferrocyanides
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3350301 |
Process for the purification of waste water by emulsion-breaking and flotation
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3331187 |
Process of gas absorption
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3314880 |
Method of removing a contaminating substance from a liquid by flotation
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3313795 |
Method of treating a liquid containing dissolved proteinaceous constituents
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3301779 |
Process for treating cold rolling mill effluent containing oil emulsified in water
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3256141 |
Method of improving the efficiency of vacuum and flotation type white water recovery systems using an acrylamide terpolymer
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3256140 |
Flotation of paper fibers
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3255097 |
Method and apparatus for clarifying electrolyte
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3252662 |
Sulfide ore beneficiation
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3203968 |
Ion flotation method
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3192155 |
System and method for the rectification and clarification of waste water
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