JP3753682B2 - Treatment method of sludge - Google Patents

Treatment method of sludge Download PDF

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Publication number
JP3753682B2
JP3753682B2 JP2002244419A JP2002244419A JP3753682B2 JP 3753682 B2 JP3753682 B2 JP 3753682B2 JP 2002244419 A JP2002244419 A JP 2002244419A JP 2002244419 A JP2002244419 A JP 2002244419A JP 3753682 B2 JP3753682 B2 JP 3753682B2
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JP
Japan
Prior art keywords
sludge
sheet
sand
sludge layer
water
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Expired - Fee Related
Application number
JP2002244419A
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Japanese (ja)
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JP2004081941A (en
Inventor
文基 星山
高晋 星山
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toray Engineering Co Ltd
Original Assignee
Toyo Construction Co Ltd
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Filing date
Publication date
Application filed by Toyo Construction Co Ltd filed Critical Toyo Construction Co Ltd
Priority to JP2002244419A priority Critical patent/JP3753682B2/en
Publication of JP2004081941A publication Critical patent/JP2004081941A/en
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00Technologies for wastewater treatment
    • Y02W10/20Sludge processing

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  • Treatment Of Sludge (AREA)

Description

【0001】
【発明の属する技術分野】
この発明は、池、湖沼、河川、海の流れ停滞部の底部に堆積しているヘドロを処理する方法に関するものである。
【0002】
【従来の技術】
従来においては、この種の池などの底部のヘドロは、バケット類に掬い取りやポンプ類による吸引などによって、地上に上げた後、脱水、加熱、微生物による分解処理などの方式で処理されている。
【0003】
しかしヘドロを池などの底部から地上に上げる際には、ヘドロと水の攪拌混合により、濁水が発生し、生息する動物(魚介類、昆虫など)や植物(草木、藻など)等を含めた生態系に悪影響を及ぼすという問題がある。
【0004】
【発明が解決しようとする課題】
この発明は、上記のような問題に鑑み、池などの底部のヘドロをその位置において処理可能なヘドロの処理方法を提供することを課題としている。
【0005】
【課題を解決するための手段】
この発明に係るヘドロの処理方法は、池などの底部のヘドロ層上に、生分解性シート又は水溶性シートを介して砂を敷設(載置)し、かつ有機物分解用微生物(細菌)を、ヘドロ層に直接又はシートへの付着を介して間接的に供給することからなる。
【0006】
この発明の処理方法は、生分解性又は水溶性シートを介して敷設した砂の荷重により、ヘドロ層を圧縮して、ヘドロ層中の水分を徐々に絞り出すとともに、有機物分解用微生物のヘドロ層中への直接の供給或いは生分解性シート又は水溶性シートに対する付着を介した間接的な供給により、ヘドロ層中の有機物を徐々に分解する一方、生分解性シート又は水溶性シートは、水と二酸化炭素への分解又は水中への溶解の形で徐々に消失させ、これにより最終的には池などの基底(基床)上に砂を沈積させるもので、比較的長い期間(例えば数ヶ月から数年)をかけてヘドロ層を激減又は消失させる。
【0007】
この発明の方法における有機物分解用微生物としては、嫌気性と好気性の微生物群(光合成細菌、メタン細菌、脱窒化菌、硫黄細菌、放線菌、酵母菌、乳酸菌、酢酸菌、糸状菌、硝化菌など)から選択した1種又は2種以上を使用することができ、光合成細菌、放線菌、酵母菌、乳酸菌、糸状菌の数十種からなる有用微生物(EM菌)は好適なものの一つである。
【0008】
また生分解性シートとしては、トウモロコシや芋、水草等の農産物を原料とする生分解性プラスチックシート類を用いることができるとともに、水溶性シートとしては、パルプシート類を用いることができる。またその厚さは、処理するヘドロ層の厚さ等に応じて、例えば1mm〜20mmを選択することができる。
【0009】
砂としては、一般には、池、湖沼、河川には、川砂や山砂を、海には海砂を用い、生分解性又は水溶性シート上における敷設厚さは、処理するヘドロ層の厚さ等に応じて、例えば10cm〜1mとすることができる。
【0010】
有機物分解用微生物のヘドロ層への直接の供給には、液状培地で培養した液状のもの(バイオ液)や固形培地で培養したゲル状のもの(バイオゲル)又はこれらのバイオ液やバイオゲルを水溶性カプセル類に封入したもの(バイオ封入ピース)の導管類を介したヘドロ層上への散布、ヘドロ層中への挿入などを含み、生分解性シート又は水溶性シートへの付着には、バイオ液のシートへの含浸のほか、バイオゲルやバイオ封入ピースのシート内への挿入なども包含する。
【0011】
【発明の実施の形態】
以下図面に基づいて、有用微生物(EM菌)で分解可能な有機物を含むヘドロ層の処理の実施形態について説明すると、まず、人力(水深が深い場合にはダイバー等の人力)で、処理すべき池などの底部のヘドロ層11上に、有用微生物のバイオ液を含浸した適宜の厚さの生分解性シート12を拡張状態で載置して、ヘドロ層11を覆う。この際必要があれば、生分解性シート12の複数の部位をアンカー類で固定するか、複数の部位に重り類を載せて、生分解性シート12が移動しないようにする。
【0012】
続いて導管類を介して、生分解性シート12上に砂を供給して、砂13を適宜の厚さ敷設し、この生分解性シート12を介した砂13によるヘドロ層11の被覆状態で数ヶ月以上の期間放置する。
【0013】
この放置の期間内に、ヘドロ層11は、砂13の荷重により圧縮されて、その含水量とともに層厚を減少して行くと同時に、生分解性シート12に付着した有用微生物のヘドロ層11への侵入により、ヘドロ層11の有機物が徐々に分解されて、ごく少量の無機物の残渣に変化する。他方生分解性シート12は徐々に生分解されて、消滅する。そして最終的には基底上に砂13が沈積して、砂層を形成する状態になる。
【0014】
この発明の方法は、このほか種々の形態で実施することができるもので、上記の形態に限定されるものではない。
【0015】
【発明の効果】
以上説明したように、この発明に係るヘドロの処理方法によれば、比較的処理期間が長いものの、実質上池などの底部のヘドロ層はもとより、その上の水の層も攪拌しないので、動植物を含む生態系に悪影響を及ぼさずに、ヘドロを処理することができる。
【図面の簡単な説明】
【図1】この発明に係るヘドロの処理方法の実施形態の略示図である。
【符号の説明】
11 ヘドロ層
12 生分解性シート
13 砂
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for treating sludge accumulated at the bottom of a stagnation part of a pond, a lake, a river, or a sea.
[0002]
[Prior art]
Conventionally, sludge at the bottom of this type of pond and the like is treated by methods such as dehydration, heating, and decomposition by microorganisms after being lifted to the ground by picking up buckets or sucking with pumps. .
[0003]
However, when raising sludge from the bottom of a pond to the ground, turbid water is generated by mixing the sludge and water, including inhabiting animals (seafood, insects, etc.) and plants (plants, algae, etc.). There is a problem of adversely affecting the ecosystem.
[0004]
[Problems to be solved by the invention]
This invention makes it a subject to provide the processing method of the sludge which can process the sludge of the bottom parts, such as a pond, in the position in view of the above problems.
[0005]
[Means for Solving the Problems]
In the sludge treatment method according to the present invention, sand is laid (placed) on a sludge layer at the bottom of a pond or the like via a biodegradable sheet or a water-soluble sheet, and a microorganism (bacteria) for decomposing organic matter is It consists of supplying the sludge layer directly or indirectly through attachment to the sheet.
[0006]
The treatment method of the present invention compresses the sludge layer by the load of sand laid through a biodegradable or water-soluble sheet, gradually squeezes out moisture in the sludge layer, and in the sludge layer of microorganisms for decomposing organic matter. The biodegradable sheet or water-soluble sheet gradually decomposes organic matter in the sludge layer by direct supply to the substrate or indirectly through attachment to the biodegradable sheet or water-soluble sheet, while the biodegradable sheet or water-soluble sheet It gradually disappears in the form of decomposition to carbon or dissolution in water, which ultimately deposits sand on the base (basement floor) of a pond, etc., for a relatively long period (eg several months to several The sludge layer drastically decreases or disappears over the years.
[0007]
The microorganisms for decomposing organic matter in the method of the present invention include anaerobic and aerobic microorganism groups (photosynthetic bacteria, methane bacteria, denitrifying bacteria, sulfur bacteria, actinomycetes, yeasts, lactic acid bacteria, acetic acid bacteria, filamentous fungi, nitrifying bacteria. 1) or two or more selected from the above, and useful microorganisms (EM fungi) consisting of dozens of photosynthetic bacteria, actinomycetes, yeasts, lactic acid bacteria, and filamentous fungi are one of the preferred ones. is there.
[0008]
As the biodegradable sheet, biodegradable plastic sheets made from agricultural products such as corn, straw, and aquatic plants can be used, and as the water-soluble sheet, pulp sheets can be used. Moreover, the thickness can select 1 mm-20 mm, for example according to the thickness etc. of the sludge layer to process.
[0009]
As sand, river sand or mountain sand is generally used for ponds, lakes, and rivers, and sea sand is used for the sea. The laying thickness on the biodegradable or water-soluble sheet is the thickness of the sludge layer to be treated. For example, it can be 10 cm to 1 m.
[0010]
For direct supply to the sludge layer of microorganisms for decomposing organic matter, liquid (bio-liquid) cultured in a liquid medium, gel-like (bio-gel) cultured in a solid medium, or these bio-liquid and bio-gel are water-soluble. For application to biodegradable sheets or water-soluble sheets, such as spraying on the sludge layer through the conduits of the capsules (bio-enclosed pieces), insertion into the sludge layer, etc. In addition to impregnation of the sheet, insertion of a biogel or bioencapsulated piece into the sheet is also included.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of treatment of a sludge layer containing an organic substance that can be decomposed by useful microorganisms (EM fungi) will be described with reference to the drawings. First, it should be treated by human power (human power such as a diver when the water depth is deep). On the sludge layer 11 at the bottom of a pond or the like, a biodegradable sheet 12 having an appropriate thickness impregnated with a biofluid of useful microorganisms is placed in an expanded state to cover the sludge layer 11. At this time, if necessary, a plurality of parts of the biodegradable sheet 12 are fixed with anchors or weights are placed on the plurality of parts so that the biodegradable sheet 12 does not move.
[0012]
Subsequently, sand is supplied onto the biodegradable sheet 12 through the conduits, and the sand 13 is laid down to an appropriate thickness, and the sludge layer 11 is covered with the sand 13 via the biodegradable sheet 12. Leave for several months or longer.
[0013]
Within this standing period, the sludge layer 11 is compressed by the load of the sand 13, and the layer thickness decreases with the moisture content, and at the same time, the sludge layer 11 of useful microorganisms attached to the biodegradable sheet 12. The organic matter in the sludge layer 11 is gradually decomposed by the intrusion, and changes into a very small amount of inorganic residue. On the other hand, the biodegradable sheet 12 is gradually biodegraded and disappears. Finally, the sand 13 is deposited on the base to form a sand layer.
[0014]
The method of the present invention can be carried out in various other forms, and is not limited to the above-described form.
[0015]
【The invention's effect】
As described above, according to the sludge treatment method according to the present invention, although the treatment period is relatively long, not only the sludge layer at the bottom of the pond and the like but also the water layer above it is not agitated. Sludge can be treated without adversely affecting the ecosystem including
[Brief description of the drawings]
FIG. 1 is a schematic view of an embodiment of a sludge treatment method according to the present invention.
[Explanation of symbols]
11 Sludge layer 12 Biodegradable sheet 13 Sand

Claims (2)

池などの底部のヘドロ層上に、生分解性シート又は水溶性シートを介して砂を敷設し、かつ有機物分解用微生物を、ヘドロ層に直接又はシートへの付着を介して間接的に供給することからなる、ヘドロの処理方法。Sand is laid on a sludge layer at the bottom of a pond or the like via a biodegradable sheet or a water-soluble sheet, and microorganisms for decomposing organic matter are supplied directly to the sludge layer or indirectly through attachment to the sheet. A sludge treatment method. 有機物分解用微生物が、嫌気性と好気性の微生物群から選択した1種又は2種以上である、請求項1記載のヘドロの処理方法。The method for treating sludge according to claim 1, wherein the microorganism for decomposing organic matter is one or more selected from anaerobic and aerobic microorganism groups.
JP2002244419A 2002-08-26 2002-08-26 Treatment method of sludge Expired - Fee Related JP3753682B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002244419A JP3753682B2 (en) 2002-08-26 2002-08-26 Treatment method of sludge

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Application Number Priority Date Filing Date Title
JP2002244419A JP3753682B2 (en) 2002-08-26 2002-08-26 Treatment method of sludge

Publications (2)

Publication Number Publication Date
JP2004081941A JP2004081941A (en) 2004-03-18
JP3753682B2 true JP3753682B2 (en) 2006-03-08

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Country Status (1)

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB201317035D0 (en) * 2013-09-26 2013-11-06 Bcuk Aquatics Ltd Water treatment

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