JPS5819359B2 - How to treat dredged sludge - Google Patents
How to treat dredged sludgeInfo
- Publication number
- JPS5819359B2 JPS5819359B2 JP11350176A JP11350176A JPS5819359B2 JP S5819359 B2 JPS5819359 B2 JP S5819359B2 JP 11350176 A JP11350176 A JP 11350176A JP 11350176 A JP11350176 A JP 11350176A JP S5819359 B2 JPS5819359 B2 JP S5819359B2
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- dredged sludge
- dredged
- oxygen
- containing gas
- 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.)
- Expired
Links
- 239000010802 sludge Substances 0.000 title claims description 26
- 239000007787 solid Substances 0.000 claims description 16
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 12
- 239000001301 oxygen Substances 0.000 claims description 12
- 229910052760 oxygen Inorganic materials 0.000 claims description 12
- 239000007789 gas Substances 0.000 claims description 11
- 150000003839 salts Chemical class 0.000 claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 5
- 238000007664 blowing Methods 0.000 claims description 4
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical class [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 3
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical class [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 3
- 239000001110 calcium chloride Chemical class 0.000 claims description 3
- 229910001628 calcium chloride Chemical class 0.000 claims description 3
- 239000011790 ferrous sulphate Substances 0.000 claims description 3
- 235000003891 ferrous sulphate Nutrition 0.000 claims description 3
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical class [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 3
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 238000003672 processing method Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 15
- 235000002639 sodium chloride Nutrition 0.000 description 9
- 238000012851 eutrophication Methods 0.000 description 6
- 239000013049 sediment Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 4
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 4
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- 238000010828 elution Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- 150000003568 thioethers Chemical class 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 210000003127 knee Anatomy 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 229910001463 metal phosphate Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Landscapes
- Treatment Of Sludge (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Removal Of Specific Substances (AREA)
Description
【発明の詳細な説明】
本発明は、河川、湖沼、海域の浚渫汚泥を処理する方法
に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for treating dredged sludge from rivers, lakes, and sea areas.
近時、河川、湖沼、海域の汚濁又は富栄養化が大きな社
会問題となってきている。In recent years, pollution or eutrophication of rivers, lakes, and sea areas has become a major social problem.
そして、それらの汚濁、富栄養化の原因が河川、湖沼、
海域の底質にあると考えられるようになるにつれて、そ
れらの底質を浚渫、処理することが所々で行なわれるよ
うになってきた。The causes of pollution and eutrophication are rivers, lakes, and marshes.
As it has come to be believed that these substances are found in the bottom sediments of oceans, dredging and processing of these bottom sediments has begun to take place in some places.
ところで、底質の浚渫処理方法であるが、多くの場合、
浚渫した底質を設定された埋立地へポンプ等で移送し、
埋立地からの越流水のみ除濁処理を施して元の浚渫水域
へ放流するものである。By the way, in many cases, the method of dredging sediment is
The dredged sediment is transferred to a designated landfill site using pumps, etc.
Only the overflow water from the landfill is treated to remove turbidity before being released into the original dredged water area.
しかるに浚渫された底質には、窒素、燐、硫化物、その
他の有機物等、それらが溶存状態では富栄養化の原因と
なると考えられるものが多く含まれる。However, the dredged sediment contains many substances such as nitrogen, phosphorus, sulfide, and other organic substances that, in their dissolved state, are thought to cause eutrophication.
埋立地へ移送された時点での浚渫汚泥は嫌気状態であり
、このような状態で燐は水中に溶出し易く、特に海塩の
存在する場合にその現象は著しい。Dredged sludge is in an anaerobic state at the time it is transferred to a landfill, and under such conditions, phosphorus is easily leached into the water, and this phenomenon is particularly noticeable in the presence of sea salt.
さらに、これら溶解性の窒素、燐、および硫化物は、微
量でも富栄養化の原因となり、除去は非常に困難で、埋
立地からの越流水中にも完全には除去されずに僅かなが
ら溶解していることが多かった。Furthermore, these soluble nitrogen, phosphorus, and sulfides cause eutrophication even in trace amounts, are extremely difficult to remove, and are dissolved in small amounts in overflow water from landfills without being completely removed. There were many things I was doing.
本発明は、浚渫汚泥中の富栄養化源の溶出を防止すると
ともに、濁質の越流をも防止することを目的とするもの
である。The present invention aims to prevent the elution of eutrophication sources in dredged sludge, as well as to prevent turbidity from overflowing.
本発明は、浚渫汚泥に硫酸第一鉄、硫酸アルミニウム、
塩化カルシウムの金属塩のうち、いずれか一つ又は複数
を混合し、さらに酸素含有気体を吹き込むことを特徴と
するものである。The present invention provides dredged sludge with ferrous sulfate, aluminum sulfate,
This method is characterized by mixing one or more of the metal salts of calcium chloride and then blowing an oxygen-containing gas into the mixture.
すなわち、溶解性ＰＯ４Ｂ−を金属の燐酸塩として不溶
性の状態になすべく、浚渫汚泥に前記金属塩を投与し、
さらにその反応速度を速める目的で酸素を含む気体を吹
き込みつつ攪拌して前記金属塩とＰＯ４３−とを反応せ
しめることにより、ＰＯ４３−の溶出を防ぐのみならず
、硫化水素の揮散、Ｈ８−の安定化という効果も期待で
きるのである。That is, in order to make soluble PO4B- into an insoluble state as a metal phosphate, the metal salt is administered to the dredged sludge,
Furthermore, in order to accelerate the reaction rate, the metal salt and PO43- are reacted by stirring while blowing in a gas containing oxygen, which not only prevents the elution of PO43-, but also evaporates hydrogen sulfide and stabilizes H8-. We can also expect the effect of
また、投与された金属塩のうち、ＰＯ４３−と十分に反
応して余剰となった部分は酸素含有気体によって酸化さ
れ、金属塩として濁質の凝集沈殿にも貢献することが期
待できる。Further, of the administered metal salt, the surplus portion that has sufficiently reacted with PO43- is oxidized by the oxygen-containing gas, and can be expected to contribute to the coagulation and precipitation of turbidity as a metal salt.
ここで酸素を含む気体を吹き込まないときは硫化水素の
揮散、Ｈ８−の安定化という効果を期待できず、添加し
た前記金属塩がＰＯ４３−たけでなく、硫化水素やＨ８
−とも反応してしまうため、ＰＯ４３−と不溶性の塩を
作るに必要な量よりもずっと多くの量を添加しなけれは
ならず、また特に硫酸第一鉄の場合は、２輪−と反応し
て余剰となった部分が濁質の凝集沈殿に貢献するという
効果も減少する。If a gas containing oxygen is not blown in here, the effects of volatilization of hydrogen sulfide and stabilization of H8- cannot be expected, and the added metal salt is not only PO43-, but also hydrogen sulfide and H8-.
Since it also reacts with PO43-, it must be added in a much larger amount than necessary to form an insoluble salt, and especially in the case of ferrous sulfate, it reacts with two rings -. The effect that the surplus portion contributes to coagulation and precipitation of suspended solids also decreases.
一方、酸素含有気体としては、ある程度の酸素を含んで
さえおれば、酸素以外の成分が浚渫汚泥を含む反応系の
酸化を阻害しない限り可であり、最も一般的なものは空
気である。On the other hand, the oxygen-containing gas may be used as long as it contains a certain amount of oxygen, as long as components other than oxygen do not inhibit the oxidation of the reaction system containing dredged sludge, and the most common gas is air.
さらに、上記金属塩の投与量は、汚泥固形物当り０．５
〜２．０重量％とし、上記酸素含有気体の吹込量は汚泥
固形物ｌ Ｋｐ当り１０〜１５０１とすれば十分である
。Furthermore, the dosage of the metal salt is 0.5 per sludge solids.
It is sufficient to set the oxygen-containing gas to 2.0% by weight and the amount of oxygen-containing gas blown to 10 to 1,501 parts per 1 Kp of sludge solids.
以上述べたように、本発明は、簡単な操作によって、浚
渫汚泥中のＰＯ４の溶出を阻止し、硫化水素を揮散、Ｈ
８−を安定化し、富栄養化の原因物質の水中への溶出を
適確に防止することができるとともに、濁質の越流をも
防止することができるものである。As described above, the present invention prevents the elution of PO4 in dredged sludge, evaporates hydrogen sulfide, and
8-, which can appropriately prevent substances that cause eutrophication from leaching into water, and can also prevent turbidity from overflowing.
次に本発明の実施例を示す。Next, examples of the present invention will be shown.
実施例 １
固形物濃度が５０，０００〜１００，０００”９／ＩＰ
Ｏ１−濃度が５０〜１５０■／ｌの浚渫汚泥に硫酸第１
鉄を汚泥固形物当り０．５〜１．０重量％添加し、空気
を汚泥固形物ＩＫｙ当り４０〜８０Ａの割合で吹き込み
、１分間程度攪拌したのち埋立地へ移送した。Example 1 Solid concentration is 50,000 to 100,000”9/IP
Add sulfuric acid to dredged sludge with an O1- concentration of 50 to 150 ■/l.
Iron was added in an amount of 0.5 to 1.0% by weight based on the solid sludge, air was blown in at a rate of 40 to 80 A per IKy of the solid sludge, and after stirring for about 1 minute, the mixture was transferred to a landfill.
このとき、埋立地からの越流水中には、ＰＯニーが０．
０５〜／ｌ以下、固形物濃度が５０ ／／Ｑ／ ｌ以下
しか存在しなかった。At this time, the overflow water from the landfill has a PO knee of 0.
05~/l or less, and the solids concentration was only 50//Q/l or less.
また、この浚渫汚泥は３００〜８００７７２グ／ｌの硫
化物を含んでいたが、埋立地からの越流水中には硫化物
は０．１／／ｌＰ／Ａ以下しか検出されなかった。Further, this dredged sludge contained sulfides of 300 to 800,772 g/l, but only 0.1//lP/A or less of sulfides were detected in the overflow water from the landfill.
しかし、空気を全く吹き込まなかった場合、１０分間程
度攪拌したのち、埋立地へ移送したが、越流水中にはＰ
Ｏｔ−が５．３”？／ｌ存在し固形物濃度も２１６０７
７２グ／ｌに達した。However, when no air was blown in, the overflow water was stirred for about 10 minutes and then transferred to a landfill, but the overflow water contained P.
Ot- is present at 5.3”?/l and the solid concentration is also 21607
It reached 72g/l.
実施例 ２
実施例１と同様の浚渫汚泥に硫酸アルミニウム（１８結
晶水付）を汚泥固形物当り１，０〜２．０重量％添加し
、実施例１と同様の空気吹き込み、および攪拌を与えて
埋立地へ移送したところ、埋立地からの越流水中には、
ｐｏニーが０．１”？／ｌ以下、固形物濃度が５０ｍ９
／ｌ以下であった。Example 2 1.0 to 2.0% by weight of aluminum sulfate (with 18 crystalline water) was added to the same dredged sludge as in Example 1, based on the sludge solids, and the same air blowing and agitation as in Example 1 were applied. When the water was transferred to a landfill, overflow water from the landfill contained
Pony is less than 0.1”?/l, solids concentration is 50m9
/l or less.
この場合、埋立地からの越流水中には硫化物が２．３ｍ
＠／ｌ含まれていたが、空気を全く吹き込まなかった場
合には、これが１５〜１８７１１９／ｌに達した。In this case, 2.3 m of sulfide was found in the overflow water from the landfill.
@/l, but when no air was blown, this amounted to 15-187119/l.
そしてＰＯ讐−は１．４１１１グ／ｌであった。And the PO was 1.4111 g/l.
実施例 ３
実施例１と同様の浚渫汚泥に塩化カルシウムを汚泥固形
物当り０．５重量％添加し、空気を汚泥固形物ＩＫｐ当
り５０Ａの割合で吹き込み攪拌して埋立地へ移送したと
ころ、埋立地からの越流水はＰＯ讐−が０．１〜／ｌ以
下、固形物濃度が１４０〜／ｌ以下、硫化物が３．５
／”ｉ／／ ｌであった。Example 3 Calcium chloride was added to the same dredged sludge as in Example 1 in an amount of 0.5% by weight based on the sludge solids, air was blown in at a rate of 50 A per sludge solids IKp, and the mixture was stirred and transferred to a landfill. Overflow water from the ground has a PO concentration of 0.1~/l or less, a solids concentration of 140~/l or less, and a sulfide content of 3.5
It was /”i//l.
しかし、空気を吹き込まなかった場合の越流水中には、
硫化物は１５〜１８ｍｐ７１．ｐ雪−はｏ、５ｍｙ７１
１固形物濃度は１８５７”Ｐ／ ｌであった。However, if air is not blown into the overflow water,
Sulfide is 15-18mp71. p snow - is o, 5my71
1 solids concentration was 1857"P/l.
Claims (1)
ルシウムの金属塩のうちいずれか一つ、あるいは複数を
添加混合し、さらに酸素含有気体を吹き込むことを特徴
とする浚渫汚泥の処理方法。 ２ 前記酸素含有気体として空気を用いる特許請求の範
囲第１項記載の浚渫汚泥の処理方法。 ３ 前記金属塩の混合量を汚泥固形物当り０．５〜２．
０重量％とし、酸素含有気体の吹込量を汚泥固形物ＩＫ
ｐ当り１０〜１５０１とする特許請求の範囲第１項又は
第２項記載の浚渫汚泥の処理方法。[Claims] 1. Dredged sludge characterized by adding and mixing one or more of metal salts of ferrous sulfate, aluminum sulfate, and calcium chloride to dredged sludge, and further blowing oxygen-containing gas into the dredged sludge. processing method. 2. The dredged sludge treatment method according to claim 1, wherein air is used as the oxygen-containing gas. 3. The mixing amount of the metal salt is 0.5 to 2.0 per sludge solids.
0% by weight, and the amount of oxygen-containing gas blown into the sludge solids IK
The method for treating dredged sludge according to claim 1 or 2, wherein the amount is 10 to 1,501 p/p.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11350176A JPS5819359B2 (en) | 1976-09-21 | 1976-09-21 | How to treat dredged sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11350176A JPS5819359B2 (en) | 1976-09-21 | 1976-09-21 | How to treat dredged sludge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5339644A JPS5339644A (en) | 1978-04-11 |
| JPS5819359B2 true JPS5819359B2 (en) | 1983-04-18 |
Family
ID=14613914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11350176A Expired JPS5819359B2 (en) | 1976-09-21 | 1976-09-21 | How to treat dredged sludge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5819359B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6070631A (en) * | 1983-09-27 | 1985-04-22 | Toshiba Corp | Manufacture of image multiplier tube |
| JPH0813357B2 (en) * | 1990-06-05 | 1996-02-14 | 株式会社海洋蘇生技術研究所 | Treatment method of sludge water collected from aquaculture fishing grounds |
-
1976
- 1976-09-21 JP JP11350176A patent/JPS5819359B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5339644A (en) | 1978-04-11 |
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