Patent application number | Description | Published |
20120145610 | FRESH WATER GENERATOR - Disclosed is a fresh water generator for fresh water production, which is effective to prevent a membrane life from becoming worse by suppressing the load on the membrane of a second semi-permeable membrane treatment facility when the concentrated water produced by the treatment of a first semi-permeable membrane treatment facility, and water to be treated with different osmotic pressure there from are mixed and treated with the second semi-permeable membrane treatment facility by the fresh water generator which comprises a means for storing the concentrated water produced from the first semi-permeable membrane treatment facility and water (B) to be treated, which is separately supplied in a storage tank A and a storage tank B in such a manner that the flow rate (mixture ratio) of the concentrated water to the water (B) to be treated is maintained constant, and supplying the concentrated water and the water (B) to be treated from each of the storage tanks to the second semi-permeable membrane treatment facility at a predetermined flow rate in at least a treatment process for treating water (A) to be treated with the first semi-permeable membrane treatment facility so as to obtain fresh water. | 06-14-2012 |
20120145630 | FRESH WATER PRODUCTION METHOD - Provided is a fresh water production method applying a combined water-treatment technology employing a plurality of semi-permeable membrane units, the method enabling prevention of problems caused by growth of a biofilm and allowing effective use of an injected chemical agent and an injected neutralizing agent. The fresh-water production method produces fresh water by treatment of source water by a semi-permeable membrane treatment device, the concentrated water resulting from the treatment by the semi-permeable membrane treatment device is mixed with other source water, and the water mixture is treated by a second semi-permeable membrane treatment device. A first chemical agent is injected continuously or intermittently into the source water and a second chemical agent is injected continuously or intermittently into the source water. | 06-14-2012 |
20120168378 | METHOD FOR PRODUCING PURE WATER AND PURE WATER PRODUCTION APPARATUS - A pure water production apparatus and method are provided that effectively use an isobaric type energy recovery unit that can efficiently recover energy against feed water variation. In a pure water producing method supplying and having a plurality of kinds of feed water with different water qualities permeated through a semi-permeable membrane to produce the pure water, a portion (referred to as first feed water) of the plurality of kinds of feed water supplied to a semi-permeable membrane unit comprising the semi-permeable membrane is boosted by utilizing an isobaric type energy recovery unit that recovers pressure energy of concentrate discharged from the semi-permeable membrane unit, the rest (referred to as second feed water) of the plurality of kinds of feed water is boosted by a high pressure pump, and the boosted first and second feed water are supplied together to the semi-permeable membrane unit. | 07-05-2012 |
20120255907 | WATER PRODUCING SYSTEM AND OPERATION METHOD THEREFOR - A water producing system which is provided with a semi-permeable membrane treatment process A | 10-11-2012 |
20120305459 | WATER PRODUCING SYSTEM - A water producing system is provided that produces fresh water by treating treatment target water A at a first semipermeable membrane treatment plant, that mixes concentrate resulted by the treatment carried out at the first semipermeable membrane treatment plant with treatment target water B, and that treats the mixed water at a second semipermeable membrane treatment plant to produce fresh water. A bypass line allows the treatment target water A to be mixed with the treatment target water B or the concentrate while bypassing the first semipermeable membrane treatment plant, so that the second semipermeable membrane treatment plant can operate even when any trouble occurs at the first semipermeable membrane treatment plant and treatment cannot be carried out thereby. | 12-06-2012 |
20130001163 | METHOD FOR PRODUCING FRESH WATER - A method is provided for producing fresh water, the method including feeding raw water to a semipermeable membrane to obtain fresh water, in which water having a solute concentration different from that of the raw water is fed and mixed with the raw water according to changes of a flow rate of fresh water of the semipermeable membrane unit and/or operating pressure of the semipermeable membrane unit. | 01-03-2013 |
20130292333 | METHOD FOR SEPARATING AND RECOVERING PURIFIED ALKALI METAL SALT - The present invention relates to a method for separating and recovering a purified alkali metal salt from an aqueous alkali metal salt solution, the method including a treatment step of removing a purification-inhibiting substance from an aqueous alkali metal salt solution with a separation membrane having a glucose removal ratio and an isopropyl alcohol removal ratio simultaneously satisfying the following expressions (I) and (II) when each of a 1000 ppm aqueous glucose solution having a temperature of 25° C. and pH of 6.5 and a 1000 ppm aqueous isopropyl alcohol solution having a temperature of 25° C. and pH of 6.5 is permeated through the separation membrane at an operating pressure of 0.75 MPa: Glucose removal ratio≧90% . . . (I), Glucose removal ratio—Isopropyl alcohol removal ratio≧30% . . . (II). | 11-07-2013 |
20150210579 | FRESH WATER GENERATION METHOD - A fresh water generation method using a fresh water-generating device. The fresh water generation method includes a first treatment process for treating sewage and wastewater using a biological treatment unit and a first solid-liquid separation unit; a second treatment process for treating sewage and wastewater with a second solid-liquid separation unit; and a first detection process for detecting the treatment capacity level of the biological treatment unit; and which adjusts the volume of sewage and wastewater treated with the second treatment process on the basis of the results of the first detection process. | 07-30-2015 |