| Metawater Co., Ltd. Patent applications |
| Patent application number | Title | Published |
|---|
| 20120031838 | PROCESS FOR PRODUCING RECLAIMED WATER AND SYSTEM FOR PRODUCING RECLAIMED WATER - The process includes operation as follows: putting ozone generated by an ozone generator into raw water, in a normal mode, to subject the raw water to ozone treatment; injecting a flocculant into the raw water before or after the ozone treatment; filtering the raw water by a separation membrane after the ozone treatment and the injection of the flocculant; and intermittently setting cleaning mode to put a larger quantity of cleaning ozone than that in the normal mode into the raw water so as to intermittently increase the concentration of dissolved ozone, thereby cleaning the filtration membrane. | 02-09-2012 |
| 20110259807 | FILTERING AND CONDENSING APPARATUS OF SUCTION TYPE - An object of the present invention is to provide a filtering and condensing apparatus of the suction type which is capable of securing the filtering performance without deteriorating the filtering efficiency. | 10-27-2011 |
| 20110259806 | FILTERING AND CONDENSING APPARATUS OF SUCTION TYPE - An object of the present invention is to provide a filtering and condensing apparatus of the suction type which is capable of improving the filtering efficiency by securing the filtering area, while at the same time keeping an integrity of the filtering cloth. | 10-27-2011 |
| 20110253625 | METHOD AND DEVICE FOR REMOVING BIOLOGICAL NITROGEN AND SUPPORT THEREFOR - Provided is a biological nitrogen removal method which includes, causing to flow a support having, on the surface portion thereof, a two-layered microbial film which holes, in the outer layer, nitrite type nitrifying bacteria or aerobic bacteria and nitrite type nitrifying bacteria as a dominant species and, in the inner layer, anaerobic ammonia oxidizing bacteria as a dominant species while being surrounded with the nitrite type nitrifying bacteria; and thereby carrying out denitrification of the water to be treated by making use of the anaerobic ammonia oxidation reaction. In the biological nitrogen removal method, a feed rate of the support (total surface area of the support per unit capacity of the reaction tank) is adjusted so that an amount of nitrous acid produced by the nitrite type nitrification reaction through the action of the nitrite type nitrifying bacteria reaches a level to inhibit a nitrate type nitrification reaction. | 10-20-2011 |
| 20110233131 | FILTERING AND CONDENSING APPARATUS OF SUCTION TYPE - An object of the present invention is, in a case where a filtering and condensing apparatus of a suction type is upsized, to provide such an apparatus which is capable of securing an integrity of a filtering cloth, while at the same time of preventing a lower portion of the filtering cloth from being slackened by maintaining the vertical tension force applied to the filtering cloth to be substantially constant. | 09-29-2011 |
| 20110015445 | PROCESS FOR PRODUCING ACETONE FROM BIOETHANOL - The present invention provides a technique for producing acetone in a high yield from hydrated ethanol derived from biomass, without requiring a large amount of energy. Hydrated ethanol derived from biomass is heated to a reaction temperature of 400° C. or higher in the presence of a Zr—Fe catalyst, thereby producing acetone. The reaction temperature is preferably from 450 to 550° C., and the Zr—Fe catalyst preferably contains 5 to 10% by mass of Zr. The present invention allows purification of hydrated acetone without requiring purification of the hydrated ethanol. | 01-20-2011 |
| 20100326912 | PROCESS FOR PRODUCING RECLAIMED WATER - There is provided a process capable of inexpensively producing reclaimed water having excellent quality from wastewater without using a large amount of ozone. The process for producing reclaimed water comprises: bringing ozone into contact with raw water such as treated sewage using an ozone contact column | 12-30-2010 |
| 20100303699 | METHOD OF REMOVING N20 FROM WASTE GAS - The invention provides a N | 12-02-2010 |
| 20100264081 | SIDE STREAM TYPE MEMBRANE BIOREACTOR PROCESS - The invention provides a side stream type membrane bioreactor process which does not cause an excessive fall in the MLSS concentration in a bioreactor, does not require any additional effluent treatment facility for discharging backwash effluent, and can further ensure the stability of the membrane filtration performance of a separation membrane. According to the invention, in a side stream type membrane bioreactor process, a backwash effluent containing foulants that are generated by backwashing a separation membrane is collected in a backwash effluent tank, and subjected to ozone treatment, and the resultant is returned to a bioreactor. By this ozone treatment, the foulants close to the membrane pore size of the separation membrane are made fine or are made into a state be easily taken into activated sludge flocs. Therefore, even when the treated effluent is returned to the bioreactor, the membrane filtration performance of the separation membrane is not deteriorated. | 10-21-2010 |
| 20100192816 | FLUIDIZED BED INCINERATOR AND FLUIDIZED BED INCINERATING METHOD FOR SLUDGE USING THE SAME - An inside of an incinerator body into which sludge is fed is divided into a lower portion, a portion above the lower portion, and a top portion in a height direction. The lower portion serves as a pyrolysis zone for supplying fluidizing air having an air ratio of 1.1 or less together with fuel to thermally decompose the sludge while fluidizing the sludge. The portion above the lower portion serves as an over bed combustion zone for supplying only combustion air having an air ratio of 0.1 to 0.3 to form a local high temperature place to decompose N | 08-05-2010 |
| 20100084338 | METHOD AND APPARATUS FOR TREATING BALLAST WATER - At the time of loading a ship, ballast water is sent to a ceramic filter membrane having a mesh of 9 to 12 μm by a filtration pump, and at the time of unloading, ballast seawater is sent to the membrane by the filtration pump to be filtrated under pressure. Thus, marine organisms larger in size than this mesh are removed. The permeated water containing marine organisms smaller in size than the mesh is sterilized with a chemical agent made of chlorine or ozone in a facility for sterilizing with chemical agent, and then discharged into the sea or poured into the ballast tank. With this, it is possible to purify a large amount of ballast water, in a short time, into a level at which the water quality standard according to the guideline can be cleared without requiring any large-sized facility or any high-concentration chemical agent. | 04-08-2010 |
| 20090127196 | METHOD FOR RECYCLING WASTEWATER - A method of wastewater reutilization by which reusable water can be stably obtained from a wastewater. Ozone is added to a wastewater, such as water resulting from sewage treatment, in such a small amount as to result in a residual ozone concentration as measured before membrane filtration of 0.01-1.0 mg/L. Ozone is thus brought into contact with fine solids contained in the wastewater to alter the surface properties of the fine solids so that the solids are easily to coagulate. Thereafter, a coagulant, e.g., PACl, is added from a coagulant addition device( | 05-21-2009 |
