186results about How to "Remove pollutants" patented technology

A reduction in contaminating impurities in a TFT, and a TFT which is reliable, is obtained in a semiconductor device which uses the TFT. By removing contaminating impurities residing in a film interface of the TFT using a solution containing fluorine, a reliable TFT can be obtained.

A thermally bonded filtration media that can be used in high temperature conditions in the absence of any loss of fiber through thermal effects or mechanical impact on the fiber components is disclosed. The filter media can be manufactured and used in a filter unit or structure, can be placed in a stream of removable fluid, and can remove a particulate load from the mobile stream at an increased temperature range. The combination of bi-component fiber, other filter media fiber, and other filtration additives provides an improved filtration media having unique properties in high temperature, high performance applications.

An air induction system for an engine to remove contaminants from intake air prior to delivery to the engine. The system includes an assembly for filtering air which is mounted in advance of the engine, and a duct for delivering air from the assembly to the engine. A sealing system is provided which prevents entry of unfiltered air while simultaneously permitting movement of the engine relative to adjacent parts of the airframe as engine power setting varies. The seal is protected from high pressures in the duct which can occur in operation of the engine.

The present invention circumvents inherent inefficiencies of photosynthesis by exposing chloroplast (or equivalents thereof) to light in a periodic manner during the organisms' “daylight” cycle. Optical, electro-optical, and/or electromechanical techniques are introduced to conventional farming methods to increase the conversion efficiency and farming yield many-fold. A module is provided that carries out the above benefits. The module includes: a solar distribution sub-system; and a structure having a plurality of growing levels configured and dimensioned to support a desired quantity of plant life and associated nutrient sources (e.g., soil, hydroponic, or an equivalent nutrient source).

An improvement is disclosed in a brush cleaning apparatus for cleaning a major surface of a wafer and including wafer guide wheels for transporting the wafer. The improvement includes a polish pad material disposed on a circumference of the guide wheels. The polish pad material is a material used in chemical-mechanical polishing of the wafer. The polish pad material contacts an edge portion of the wafer during cleaning thereof, thereby removing contaminants from the edge portion of the wafer, so that edge cleaning is performed in situ in addition to the brush cleaning of the major surface of the wafer.

A process for continuous countercurrent ion exchange comprises piping a contaminated feed stream into a closed loop ion exchange contactor. The contactor is an ion exchange bed that has three or more reaction segments. The segments are comprised of at least an adsorption segment for treating the contaminated feed stream, a regeneration segment for stripping the contaminant ions from the resin bed, and a pulse segment for advancing the resin bed. Simultaneously, the feed stream is moved through the contactor in the same direction as the regeneration stream. Measuring the quality of this treated feed stream after it exits the contactor monitors the treatment capacity of the resin bed. In response to this quality measurement, the regenerated resin bed is advanced in the pulse segment of the contactor. The spent brine is recycled back to the contactor until the final effluent brine is highly concentrated. After the resin stops advancing, the feed stream and regeneration stream resume flow. Process water is recycled in four different steps of the ion exchange process, for the dilution of acid, as resin rinsing water, for back wash and during the resin pulsing stage.

An air guard directs air toward a viewing window of an optoelectronic presence sensing device to reduce surface contamination thereon. The air guard may include a control valve, and possibly control circuits, to enable selective activation of the air guard. In one embodiment, the air guard includes one or more slits configured to vent pressurized air in a generally laminar (curtain like) flow in front of the window to prevent the deposition of airborne contaminants thereon. Alternatively, or additionally, the air guard may include one or more nozzles configured to vent pressurized air in directed air streams toward the window to remove surface contaminants thereon, and may include a control valve enabling selective operation in preventive, cleaning, or standby modes. Mode control may be effected by an external control system, by the presence sensing device, or by the air guard itself, which may include a timer or other control circuit.

The invention is directed to a method for producing a polypeptide composition comprising: combining a polypeptide with a volatile additive to form a liquid mixture and lyophilizing the liquid mixture to obtain a lyophilized polypeptide composition.

A method for integrated treatment of electroplating wastewater includes steps of: adjusting and maintaining pH of wastewater at 10.5-12; oxidizing pollutants such as sodium cyanide and hydroxyl-containing organic amine complexants with sodium hypochlorite; precipitating carboxyl-containing organic acid complexants with synergistic effect of ferrous and calcium ions; reducing hexavalent chromium to trivalent chromium and forming chromium hydroxide precipitate; removing precipitate by filtering; adjusting wastewater to pH of 4.5-5.5; precipitating heavy metal ions with sodium dimethyldithiocarbamate or sodium diethyldithiocarbamate; adsorbing precipitate and heavy metal capturing agents with activated carbon; filtering to remove precipitate; adjusting wastewater to pH of 6-8; and destroying aliphatic polyamine complexants and reducing COD using an available biological degradation technique. This method can effectively and economically remove the pollutants such as heavy metals in the electroplating wastewater for a good market prospective.

The present invention provides methods and systems for the extraction of solutes from solid matter using dense gases in a mechanical auger separation system.

A porous composite block is provided that contains at least two groups of binding agent particles. The first binding agent particles have an average particle size between about 5 μm and 200 μm. The second binding agent particles have an average particle size no larger than half the average particle size of the first binding agent particles and also between about 10 nm and 30 μm. The porous composite block can also contain active grains and active granules such that the granules are smaller than the grains. The grains and the granules can be capable of treating water. A method of forming a porous composite block and a water treatment system are also provided.

In a RLSA microwave plasma processing apparatus that radiates microwave from a microwave generator into a chamber by using a planer antenna (Radial Line Slot Antenna) having many slots formed according to a certain pattern, the chamber contaminated with Na or the like is cleaned by using a cleaning gas containing H₂ and O₂.

The present disclosure relates to nanocrystalline titanium dioxide (TiO₂) photocatalysts having nanocrystallites of less than 14 nanometers in diameter, which are substantially defect-free. The TiO₂ photocatalysts form porous particles having a very large mass transfer surface area, large cylindrical pores, and low mass transfer resistance. The nanocrystalline TiO₂ photocatalysts provide at least 75% of the photocatalytic activity of commercially-available TiO₂ crystals having diameters greater than 20 nm. The nanocrystalline TiO₂ photocatalysts may be doped with a metal, metal oxide, or non-metal dopant. A process for preparing the nanocrystalline TiO₂ photocatalysts is disclosed. The present disclosure also provides methods for using nanocrystalline TiO₂ photocatalysts to remove contaminants.

A compact point of use water purifier intended for both urban and rural areas of developing countries, consisting of a spigot with integrated UV radiation source adjacent to an outlet orifice to selectively on demand expose untreated water when the spigot valve mechanism is activated to dispense water for consumption. The water purifier is connectable to an electric power source, either 110V/220V AC or 12 VDC, by means of a transformer unit delivering the appropriate voltage to spigot unit.

A generator system includes a DC battery, an inverter, AC motor and a generator. The generator is use to transmit power to an alternating current source, such as an entire house, a refrigerator, a TV, etc. In order to run the generator, a DC battery is connected to an AC motor to supply energy so that the motor can run the generator. An inverter is introduced between the DC battery and the AC motor to change direct current to alternate current. The DC battery is charged in different ways, such as using part of the power generated by the generator or a battery charger or a 12VDC generator.