JPS55162309A - Pretreatment method for seawater or brine in reverse osmosis method - Google Patents
Pretreatment method for seawater or brine in reverse osmosis methodInfo
- Publication number
- JPS55162309A JPS55162309A JP7094279A JP7094279A JPS55162309A JP S55162309 A JPS55162309 A JP S55162309A JP 7094279 A JP7094279 A JP 7094279A JP 7094279 A JP7094279 A JP 7094279A JP S55162309 A JPS55162309 A JP S55162309A
- Authority
- JP
- Japan
- Prior art keywords
- filter
- water passing
- case
- coagulant added
- seawater
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
PURPOSE: To shorten time until reaching a stable level from the reopening of water passing by a method wherein the quantity of a coagulant added to a filter in case of normal water passing is specified while the quantity of the coagulant added at the initial stage of water passing just after lock-washing is increased more than the quantity to be used in case of the normal water passing.
CONSTITUTION: The concentration of a coagulant added in the case when seawater or brine is normally passed through a filter medium is set to 0.05W1ppm. The concentration of the coagulant added at the initial stage of the reopening of water passing just after the back-washing of said filter is temporarily increased more than 2ppm, and the filter is operated. For example, the filter is operated in such a manner that valves 7, 13, 10 are opened, while only a pump 15 is worked, and the coagulant is simultaneously injected from the arrow head B. In this case, the concentration of the coagulant added is temporarily increased more than 2ppm, and back-washing drainage is joined along the arrow head H from a back-washing drainage tank 1. That is, the quantities of flocks in the seawater introduced into the filter 5 are increased only at the initial stage of the reopening of operation, and the adhesion of the flocs, etc. onto a surface of a filter layer is promoted.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7094279A JPS55162309A (en) | 1979-06-05 | 1979-06-05 | Pretreatment method for seawater or brine in reverse osmosis method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7094279A JPS55162309A (en) | 1979-06-05 | 1979-06-05 | Pretreatment method for seawater or brine in reverse osmosis method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS55162309A true JPS55162309A (en) | 1980-12-17 |
Family
ID=13446052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7094279A Pending JPS55162309A (en) | 1979-06-05 | 1979-06-05 | Pretreatment method for seawater or brine in reverse osmosis method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55162309A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6468430B1 (en) * | 1998-07-21 | 2002-10-22 | Toray Industries, Inc. | Method for inhibiting growth of bacteria or sterilizing around separating membrane |
-
1979
- 1979-06-05 JP JP7094279A patent/JPS55162309A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6468430B1 (en) * | 1998-07-21 | 2002-10-22 | Toray Industries, Inc. | Method for inhibiting growth of bacteria or sterilizing around separating membrane |
| US6743363B2 (en) | 1998-07-21 | 2004-06-01 | Toray Industries, Inc. | Method of bacteriostasis or disinfection for permselective membrane |
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