JPH10165837A - Sea sand washing method - Google Patents
Sea sand washing methodInfo
- Publication number
- JPH10165837A JPH10165837A JP33593996A JP33593996A JPH10165837A JP H10165837 A JPH10165837 A JP H10165837A JP 33593996 A JP33593996 A JP 33593996A JP 33593996 A JP33593996 A JP 33593996A JP H10165837 A JPH10165837 A JP H10165837A
- Authority
- JP
- Japan
- Prior art keywords
- sea sand
- sewage
- salt content
- treatment plant
- washing
- 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 Of Solids By Using Liquids Or Pneumatic Power (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、塩分を含んで建設
資材として使用できない海砂を使用可能な程度にまで塩
分除去する方法に関し、同時に下水処理場から放流され
る下水処理水の有効利用をも可能にする海砂洗浄方法に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for removing salt from seawater which cannot be used as a construction material and contains salt, to the extent that it can be used. Sea sand washing method that also enables
【０００２】[0002]
【従来の技術】塩分を含んで直ぐには建設資材として使
用できない海砂を使用可能な程度にまで塩分除去するた
めの従来の技術は、真水(河川水や地下水、工業用水)に
よって洗浄するのが一般的であった。一方、下水処理場
から排出される水は海へそのまま放流されていた。2. Description of the Related Art The conventional technology for removing sea sand, which cannot be used immediately as construction material containing salt, to the extent that it can be used, is to wash it with fresh water (river water, groundwater, industrial water). Was common. On the other hand, the water discharged from the sewage treatment plant was discharged directly into the sea.
【０００３】[0003]
【発明が解決しようとする課題】河川水等は季節的に供
給量が変動する難点があるし、工業用水等の使用はコス
トも高い難点がある。そこで、海砂を安価に洗浄するこ
とと、下水処理場から排出される水の有効利用について
種々検討した。The supply of river water and the like has a problem that the supply amount varies seasonally, and the use of industrial water and the like has a problem that the cost is high. Therefore, various studies were conducted on inexpensive washing of sea sand and effective use of water discharged from sewage treatment plants.
【０００４】[0004]
【課題を解決するための手段】上記課題を検討した結
果、海砂を下水処理場から放流される下水処理水を用い
て洗浄し、海砂の塩分除去することを特徴とする海砂洗
浄方法を開発した。As a result of studying the above problems, a sea sand cleaning method characterized by washing sea sand using sewage treated water discharged from a sewage treatment plant to remove salt from sea sand. Was developed.
【０００５】また、上記手段で得られた洗浄海砂の塩分
のものよりも、より少ない塩分のものが必要とされる場
合、上記海砂を下水処理場から放流される下水処理水を
用いて洗浄した操作に次いで、海砂中の残余の塩分を真
水で除去することを特徴とする海砂洗浄方法とした。[0005] Further, when a salt having a lower salt content than the salt content of the washed sea sand obtained by the above-mentioned means is required, the sea sand is discharged from a sewage treatment plant using sewage treated water. Subsequent to the washing operation, a sea sand washing method was characterized in that residual salt in sea sand was removed with fresh water.
【０００６】[0006]
実施例１ 図１の海砂洗浄フローシートに示すように、運搬船によ
って搬入されてきた海砂(塩分18,000〜20,000ppm)100ｍ
3あたり下水処理場から排出される下水処理水50トンを
使用して洗浄した。その結果、洗浄海砂は塩分濃度が22
0ppmに低下して建設資材に使用可能な建設省基準の400p
pmよりもはるかに低いものとなり、建設資材としての提
供が可能となった。Example 1 As shown in the sea sand washing flow sheet in FIG. 1, 100 m of sea sand (salinity: 18,000 to 20,000 ppm) carried in by a carrier ship.
Washing was performed using 50 tons of sewage treated water discharged from sewage treatment plants per 3 units. As a result, the washed sea sand has a salt concentration of 22.
Reduced to 0 ppm and can be used for construction materials 400 p of Ministry of Construction standards
It is much lower than pm and can be provided as construction material.
【０００７】実施例２ 図１中右方にみられるように、実施例１と同様操作によ
って得られた塩分濃度が220〜230ppmの洗浄海砂100ｍ3
あたり、川水10トンを用いて洗浄した。その結果、塩分
濃度が150ppmの精製洗浄海砂が得られた。これは地方自
治体(例えば岡山県)によっては建設資材として使用する
砂の塩分濃度を200ppm以下と規定している所での使用に
も供することができることとなった。Example 2 As shown on the right side of FIG. 1, 100 m 3 of washed sea sand having a salt concentration of 220 to 230 ppm obtained by the same operation as in Example 1.
Per wash was performed using 10 tons of river water. As a result, purified washed sea sand having a salt concentration of 150 ppm was obtained. This means that some local governments (for example, Okayama Prefecture) can use the sand where the salinity of sand used as construction material is less than 200 ppm.
【０００８】[0008]
【発明の効果】本発明によって、塩分を含み建設資材と
して使用できない海砂を使用可能な程度にまで塩分除去
することを可能とすると共に、下水処理場から放流され
る下水処理水の有効利用をも可能にした。また、渇水期
には使用できない河川水に比べて安定した供給が可能な
下水処理水を使用することとしたので、安定して洗浄海
砂の提供ができることとなった。更に、下水処理場から
放流される下水処理水中の浮遊物質等の固形分を水中か
ら除去するので、水の浄化作用も得られ、環境保全にも
寄与することとなった。Industrial Applicability According to the present invention, it is possible to remove sea salt containing salt and which cannot be used as construction material to the extent that it can be used, and to make effective use of sewage treated water discharged from a sewage treatment plant. Also enabled. In addition, the use of sewage treatment water, which can provide a more stable supply than river water that cannot be used during the drought period, has enabled the stable supply of washed sea sand. Further, since solids such as suspended solids in the sewage treated water discharged from the sewage treatment plant are removed from the water, a water purifying action is obtained, which also contributes to environmental conservation.
【図１】本発明の海砂洗浄方法の一例を示すフローシー
トである。FIG. 1 is a flow sheet showing an example of the sea sand cleaning method of the present invention.
Claims (2)
理水を使用して洗浄し、海砂の塩分除去することを特徴
とする海砂洗浄方法。1. A method for cleaning sea sand, comprising washing sea sand using sewage treated water discharged from a sewage treatment plant to remove salt from the sea sand.
理水を使用して洗浄し、次いで、海砂中の残余の塩分を
真水で除去することを特徴とする海砂洗浄方法。2. A method for washing sea sand, comprising washing sea sand using sewage treated water discharged from a sewage treatment plant, and then removing residual salt in the sea sand with fresh water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33593996A JPH10165837A (en) | 1996-12-16 | 1996-12-16 | Sea sand washing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33593996A JPH10165837A (en) | 1996-12-16 | 1996-12-16 | Sea sand washing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10165837A true JPH10165837A (en) | 1998-06-23 |
Family
ID=18294041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33593996A Pending JPH10165837A (en) | 1996-12-16 | 1996-12-16 | Sea sand washing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10165837A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI586434B (en) * | 2012-08-29 | 2017-06-11 | Ying-Quan Zhan | Oxygen washing gravel unit |
-
1996
- 1996-12-16 JP JP33593996A patent/JPH10165837A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI586434B (en) * | 2012-08-29 | 2017-06-11 | Ying-Quan Zhan | Oxygen washing gravel unit |
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