JP3609396B2 - Soil purification material - Google Patents

Soil purification material Download PDF

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JP3609396B2
JP3609396B2 JP2003113325A JP2003113325A JP3609396B2 JP 3609396 B2 JP3609396 B2 JP 3609396B2 JP 2003113325 A JP2003113325 A JP 2003113325A JP 2003113325 A JP2003113325 A JP 2003113325A JP 3609396 B2 JP3609396 B2 JP 3609396B2
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soil
wood vinegar
wood
gas
soil purification
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JP2004313982A (en
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一男 大友
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一男 大友
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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
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00Technologies for the production of fuel of non-fossil origin
    • Y02E50/10Biofuels, e.g. bio-diesel
    • 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
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/78Recycling of wood or furniture waste

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  • Processing Of Solid Wastes (AREA)
  • Soil Conditioners And Soil-Stabilizing Materials (AREA)

Description

【0001】
【発明が属する技術分野】
本発明は、新規な木酢液を主成分とする土壌浄化材に関する。
【0002】
【従来の技術】
木酢液は、木を燻すこと(乾留すること)によって得られ、炭窯における炭生産の副産物として、或いは、炭生産の副産物ではなく木酢液抽出プラントによって得られる木酢液原液から植物タールを分離して得られる(特許文献1,2参照)。通常、炭生産の副産物としては、自然木100kgから5〜8リットル採れるが、木酢液抽出プラントによれば、50リットル可能であることから、木酢液生産には木酢液抽出プラントが用いられる。
従来手段で得られる木酢液や植物タールは、土壌改良剤や防腐剤として使用されているものの、その分野は限られている。本発明者は、更に従来の木酢液に比べて機能が高い木酢液の開発と新規な利用分野の開拓に努めてきた。
【0003】
【特許文献1】
特開平6−88077号公報
【0004】
【特許文献1】
特開平9−143474号公報
【0005】
【発明の課題】
そこで、本発明の課題は、従来の木酢液に比べて土壌浄化機能が高い木酢液の提供することにある。
【0006】
【課題を解決するための手段】
上記課題を達成するために、本発明は、下記の手段を講じた。即ち、
請求項1記載の土壌浄化材は、土壌からシアン、ヒ素、六価クロム、水銀又は鉛を除去する土壌浄化材であって、金属成分としてFe、Na、 K 、Ca、Zn、Mn、Si、Mgを含有し、更に、有機物質として、酢酸、蟻酸、プロピオン酸、クエン酸をそれぞれ乾留手段により含有する木酢液を主成分とするものである。
【0009】
【発明の実施の態様】
以下、本発明の土壌浄化機能が高い木酢液の実施例を説明する。本発明に係る土壌浄化機能が高い木酢液の製造システムについては、本出願人は、既に特願2001−339595号、及び、特願2001−339596号(両件共、平成13年11月05日出願)として提案している。特に、特願2001−339595号においては、本発明者の発明した木酢液は土壌浄化機能があるという知見が得られている。本発明は、その後の試験・研究により、土壌浄化機能の確実性と客観的なデータが得られたことから、ここに新規な発明として提案するものである。
【0010】
(製造システム)
先ず、その土壌浄化機能が高い木酢液の製造システムについて説明する。本製造システムは、原材料としては、間伐材、新築端材などを用いて、乾留ガス等を製造するシステム(循環バイオマスエネルギープラント)である。
【0011】
(原材料)
原材料としては、上記の間伐材、バーグ、新築端材の外、製材くず、街路樹・公園の剪定枝、ダムの流木、塔婆などを活用できる。不活用の木質資材をチップ化し、製造装置にはチップの形で投入する。本実施例においては、3t/6時間のペースで製造プラントを稼動する。
【0012】
(製造装置)
上記システムについて、図1の概念図、及び、図2の乾留プラントの概略説明図を用いて説明する。本実施例に係るシステムは、大別して乾留装置10と第1冷却装置20と第2冷却装置30とからなる。乾留装置10には、原料となる木材チップのチップ投入口11が設けられると共に、乾留装置10で発生するガスを導き出すガス導出部12が設けられる。また、乾留装置10の上端部には、第1ガス搬送管13が設けられると共に、下部位置には炭取出口15が設けられる。
【0013】
また、乾留装置10の外周には冷却装置(図外)が配置され、該冷却装置に冷却水を供給する冷却水供給管16が付設されると共に、温水取出口17が設けられる。上記乾留装置10に隣接して第1冷却装置20が設けられ、第1ガス搬送管13が第1冷却装置20の上部のガス受入部21に連結されている。また、第1冷却装置20の下部には、第1木酢液受ホッパ22が設けられると共に、その下部には第1木酢液貯留槽23が設けられ、更に、第1木酢液貯留槽23の下部には、木酢液取出口24が連結されている。
【0014】
また、第1冷却装置20には、ガス送出孔25を介して第2ガス搬送管26が設けられ、この第2ガス搬送管26の他端はガス受入部31を介して第2冷却装置30に連結される。また、前記第2冷却装置30には、第2木酢液受ホッパ32が設けられると共に、その下部には第2木酢液貯留槽33が配置され、該第2木酢液貯留槽33の下部には木酢液取出口34が設けられる。また、第2冷却装置30の側部に設けられているガス送出部35には、第2ガス搬送管36が連結されている。
【0015】
更に、前記第2ガス搬送管36の他端は吸引ブロー40に連結され、吸引ブロー40には、第3ガス搬送管41が設けられる。また、第3ガス搬送管41には木質ガス貯め部42が設けられ、該木質ガス貯め部42には、木酢液取出口43及び木質ガス排出部44が設けられる。
また、図2には、乾留装置10に供給される冷却水供給管16及び温水取出口17のみ示されているが、第1冷却装置20及び第2冷却装置30にも冷却水供給管が設けられていることはいうまでもない。これらの冷却水供給管システムは、それぞれの装置を別個に冷却するのではなく、例えば、冷却水供給管を、冷却水供給部から第1冷却装置20、第2冷却装置30、乾留装置10及び温水取出口17をこの順で直列に連結することで、本システムの機能アップに繋げることができる。
【0016】
上記装置において、チップ投入口11から乾留装置10に投入された木材チップは、700〜1300℃で乾留され、木材乾留生成物(以下、「木質ガス」という)が発生する。該木質ガスはガス導出部12を介して第1ガス搬送管13で第1冷却装置20に吸引される。ここで、木質ガスは冷却され、凝縮した木酢原液が第1木酢液貯留槽23で溜められる。
また、第1冷却装置20内の木質ガスは、ガス送出孔25及び第2ガス搬送管26を介して第2冷却装置30に送られる。木質ガスは、ここで更に冷却され、凝縮した木酢原液は第2木酢液貯留槽33に貯留される。そして、更に第2冷却装置30内の木質ガスは、ガス送出部35及び第2ガス搬送管36を介して吸引ブロー40により第3ガス搬送管41に送られ、木質ガス貯め部42に貯留される。
【0017】
この木質ガス貯め部42内のガスは木質ガス排出部44から排出され、乾留装置10の熱エネルギとして利用される。この間、乾留装置10には、冷却水供給管16から冷却水が供給され、また、温水取出口17からは、45℃の温水が毎時4200リットル取り出せる。
上記装置により得られる木酢原液を原料として製造されるメタノールは、クリーンエネルギーであり、低公害車の燃料とすれば、燃焼しても二酸化炭素を発生しない。この木酢原液を原料として製造される植物性タールは、害虫、ダニ、鳥、獣などの忌避剤として利用できる。
【0018】
また、木酢液自体は、後述するように、土壌・水質の汚染防止にも、利用でき、更に、後述するように、無農薬・無化学肥料栽培を実現可能とするから、地力農法を実現でき、品質の高い農産物が得られる。木質ガスは、木酢液から製造されるメタノールと同様に、クリーンな木質バイオマスエネルギーとして活用できる。
【0019】
(木酢液の特性)
実施例1で得られた木酢液の特性の定性定量分析結果を以下に示す。
金属成分(ミネラル)は、表1の通り。
【0020】
【表1】

Figure 0003609396
【0021】
上記表1は、IPC発光分析装置にて分析した。上記元素の外に、A1、Cu、Ni、Baを微量含有している。また、*印は肥科の3要素の1つ。いずれも上表の諸元素は植物の成長に欠かせない元素である。
有機物質の成分は、表2の通り。
【0022】
【表2】
Figure 0003609396
【0023】
上記表2は、高速液体クロマトグラフ分析にて分析した。上記有機物質の外に、メタノールやフェノール類が検出された。溶解タール中に含まれるフェノール類はタンク内で醸成期間中に還元される。
【0024】
本発明者は、製造システムで得られた木酢液(以下、単に「木酢液」という)を用いて、利用実験した。
【0025】
(木酢液の利用分野)
木酢液の上記効果により、巾広い分野の利用が可能であるが、発明者が、実験により確認した分野は下記表3に示した通りである。
【0026】
【表3】
Figure 0003609396
【0027】
【実施例】
(土壌浄化)
そこで、更に、発明者が試みた土壌浄化に関する利用技術について説明する。木酢液は土中にある線虫などに有効であることが知られており、更にギ酸などの有機酸が相乗的に作用し、土壊を中和して微生物の生活環境を改善し土壌改良に有効である。また、汚染土壌中の一部の有書物質を分離・分解することも実験の結果確認されている。
【0028】
土壌浄化とは、狭義には汚染土壌中の有害物質を分離・分解することを指すが、広義には、汚染物質が周辺の土壌や地下水に拡散しないよう、除去や封じ込め処理を行うことも含まれる。
従来、汚染土壌には、掘削・搬出、薬品による処理、電気による金属の分離、コンクリートやゴムシートによる汚染土壌全体の封じ込めなどの手段がとられている。土壌は一旦汚染されると、浄化しない限り、その影響が持続する特徴がある。こうしたことから、土壌汚染の環境問題に伴って、規制の強化など浄化の必要性は高まっている。
【0029】
出願人は、人畜無害で、二次・三次汚染の心配がなく、現場での施用だけで行える低コスト(従来の50%以下)の実施例1で得られた木酢液(E木酢液という。)を用いた土壌浄化土壌浄化改良技術を開発した。
この技術は自然の摂理に則った土壌浄化・改良技術である。換言すれば、物理的な汚染土壌の撤去や、環境にさらに負荷(薬品)を与える、化学薬品による反応を利用した改良方法でもない、生活環境に負荷の少ない浄化改良技術である。
【0030】
その手段としては、上記製造システムで得られた木酢液(原液)を対象とする土壌に散布する。散布量は1平方m当り10リットル(1立方m当り10リットルが目安)。散布手段は散布器等のいかなる方法でもよいが、ある程度水圧(水道水程度の水圧)があったほうが、土壌への浸透が促進される。この手段によれば、ランニングコストは、従来の浄化システムに比べて50〜60%減で済むばかりでなく、通常、施用期間も10日から1ヶ月と短期間ですむ。また、原位置処理(汚染位置での処理)による浄化改良施用なので、大掛かりな機材や装置を用意しないですみ、汚染土壌の施用浄化後の有効再利用も可能である。何よりも、本手段によれば、汚染の拡撤を防止するだけでなく、浄化作用が土壌の自浄能力との相乗効果で持続されるという有利性がある。
【0031】
次に、具体的な試験例を紹介する。
【試験例1】
(試験の課題)出願人か開発した木酢液の土壌浄化機能の検証
シアン、人体の有害な金属(六クロム、砒素、水銀、鉛)等の汚染除去の必要性。
(散布方法)上記の通り(木酢液(原液)を1平方m当り10リットル。散布手段は通常の散布器。
(試験土壌採取場所)東京都荒川区 U鍍金工場
(試験機関)東京環境測定センター(東京都荒川区東尾久6−43−9) 環境計量士
(試験の方法)平成3年環境庁告示第46号付表に定める方法等。基準値は平成15年2月14日東京都告示第150号による。なお、以下の試験も、試験の課題・方法・試験者等は同じである。
(試験結果)表4の通り
【0032】
【表4】
Figure 0003609396
【0033】
(評価)
鉛、ヒ素が大幅減少した。 全シアン、六価クロム、総水銀が不検出となった。鉛が処理後検知された。
【0034】
【試験例2】
(試験結果)表5の通り。
【0035】
【表5】
Figure 0003609396
【0036】
(評価)全シアン、鉛、六価クロム、ヒ素、総水銀共に大幅に減少した。
【0037】
【試験例3】
(試験結果)表6の通り。
【0038】
【表6】
Figure 0003609396
【0039】
なお、5地点は処理前は4地点であった。4地点の内、上記表にない地点は、表5のNo.3の土壌である。
【0040】
(評価)すべての有害物質が大幅に減少する(浄化される)ことがわかった。
(総合評価)E木酢液により、汚染土壌の浄化の顕著性が確認できた。
【0041】
【発明の効果】
以上の説明から理解できるように、本発明によれば、E木酢液により、汚染土壌浄化の顕著性が確認できた。
【図面の簡単な説明】
【図1】本発明に係る実施例の概念図。
【図2】同実施例に用いる木酢液製造システムの概念縦断面図。
【符号の説明】
10・・・乾留装置 11・・・チップ投入口
13・・・第1ガス搬送管 15・・・炭取出口
17・・・温水取出口
20・・・第1冷却装置 23・・・第1木酢液貯留槽
24・・・木酢液取出口 26・・・第2ガス搬送管
30・・・第2冷却装置
33・・・第2木酢液貯留槽 34・・・木酢液取出口
36・・・第2ガス搬送管 40・・・吸引ブロー[0001]
[Technical field to which the invention belongs]
The present invention relates to a soil purification material mainly composed of a novel wood vinegar solution.
[0002]
[Prior art]
Wood vinegar is obtained by drowning (dry-distilling) wood, and plant tar is separated from the wood vinegar liquor stock solution obtained as a byproduct of charcoal production in a charcoal kiln or by a wood vinegar liquor extraction plant rather than byproducts of charcoal production. Obtained (see Patent Documents 1 and 2). Usually, as a by-product of charcoal production, 5 to 8 liters can be taken from 100 kg of natural wood, but according to the vinegar extraction plant, 50 liters are possible, and thus a vinegar extraction plant is used for the production of vinegar.
Although wood vinegar and plant tar obtained by conventional means are used as soil conditioners and preservatives, their fields are limited. The present inventor has further sought to develop a vinegar solution having a higher function than that of a conventional vinegar solution and to develop a new application field.
[0003]
[Patent Document 1]
JP-A-6-88077 [0004]
[Patent Document 1]
JP-A-9-143474 [0005]
[Problems of the Invention]
Then, the subject of this invention is providing the wood vinegar liquid with a high soil purification function compared with the conventional wood vinegar liquid.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention has taken the following measures. That is,
The soil purification material according to claim 1 is a soil purification material for removing cyan, arsenic, hexavalent chromium, mercury or lead from soil, and Fe, Na, K , Ca, Zn, Mn, Si, The main component is a pyroligneous acid solution containing Mg, and further containing acetic acid, formic acid, propionic acid, and citric acid as organic substances by dry distillation means .
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the Example of the pyroligneous acid liquid with the high soil purification function of this invention is described. Regarding the production system of wood vinegar having a high soil purification function according to the present invention, the present applicant has already applied Japanese Patent Application Nos. 2001-339595 and 2001-339596 (both cases, November 05, 2001). Application). In particular, in Japanese Patent Application No. 2001-339595, the knowledge that the wood vinegar invented by the present inventor has a soil purification function is obtained. The present invention is proposed as a novel invention since the reliability and objective data of the soil remediation function were obtained through subsequent tests and research.
[0010]
(Manufacturing system)
First, the manufacturing system of the wood vinegar liquid with the high soil purification function is demonstrated. This production system is a system (circulating biomass energy plant) that produces dry distillation gas, etc., using thinned wood, newly constructed lumber, etc. as raw materials.
[0011]
(raw materials)
As raw materials, in addition to the above-mentioned thinned lumber, berg, and new construction materials, sawn timber, pruned branches of roadside trees and parks, driftwood from dams, towers, etc. can be used. Chip unused woody materials into chips and put them into manufacturing equipment in the form of chips. In the present embodiment, the production plant is operated at a pace of 3t / 6 hours.
[0012]
(manufacturing device)
The said system is demonstrated using the schematic diagram of FIG. 1, and the schematic explanatory drawing of the carbonization plant of FIG. The system according to the present embodiment is roughly composed of a dry distillation apparatus 10, a first cooling apparatus 20, and a second cooling apparatus 30. The dry distillation apparatus 10 is provided with a chip insertion port 11 for wood chips as a raw material, and a gas outlet 12 for deriving gas generated in the dry distillation apparatus 10. In addition, a first gas transport pipe 13 is provided at the upper end of the dry distillation apparatus 10, and a charcoal outlet 15 is provided at the lower position.
[0013]
Further, a cooling device (not shown) is disposed on the outer periphery of the dry distillation apparatus 10, a cooling water supply pipe 16 for supplying cooling water to the cooling apparatus is attached, and a hot water outlet 17 is provided. A first cooling device 20 is provided adjacent to the carbonization device 10, and the first gas transport pipe 13 is connected to a gas receiving portion 21 at the upper portion of the first cooling device 20. In addition, a first wood vinegar receiving hopper 22 is provided at the lower part of the first cooling device 20, a first wood vinegar liquid storage tank 23 is provided at the lower part thereof, and a lower part of the first wood vinegar liquid storage tank 23. The wood vinegar liquid outlet 24 is connected to the slag.
[0014]
The first cooling device 20 is provided with a second gas transport pipe 26 via a gas delivery hole 25, and the other end of the second gas transport pipe 26 is connected to the second cooling device 30 via a gas receiving portion 31. Connected to The second cooling device 30 is provided with a second wood vinegar liquid receiving hopper 32, and a second wood vinegar liquid storage tank 33 is disposed below the second wood vinegar liquid storage tank 33. A wood vinegar outlet 34 is provided. A second gas transport pipe 36 is connected to the gas delivery unit 35 provided on the side of the second cooling device 30.
[0015]
Further, the other end of the second gas transport pipe 36 is connected to a suction blow 40, and the suction blow 40 is provided with a third gas transport pipe 41. Further, the third gas transport pipe 41 is provided with a wood gas storage part 42, and the wood gas storage part 42 is provided with a wood vinegar liquid outlet 43 and a wood gas discharge part 44.
2 shows only the cooling water supply pipe 16 and the hot water outlet 17 supplied to the dry distillation apparatus 10, but the first cooling apparatus 20 and the second cooling apparatus 30 are also provided with a cooling water supply pipe. Needless to say, it is. These cooling water supply pipe systems do not cool each device separately. For example, the cooling water supply pipe is connected to the first cooling device 20, the second cooling device 30, the dry distillation device 10, and the like from the cooling water supply unit. By connecting the hot water outlet 17 in series in this order, the function of the present system can be improved.
[0016]
In the above apparatus, the wood chips introduced into the carbonization apparatus 10 from the chip insertion port 11 are carbonized at 700 to 1300 ° C. to generate a wood carbonization product (hereinafter referred to as “woody gas”). The wood gas is sucked into the first cooling device 20 through the gas outlet 12 through the first gas transport pipe 13. Here, the wood gas is cooled, and the condensed wood vinegar stock solution is stored in the first wood vinegar solution storage tank 23.
Further, the wood gas in the first cooling device 20 is sent to the second cooling device 30 through the gas delivery hole 25 and the second gas transport pipe 26. The woody gas is further cooled here, and the condensed wood vinegar stock solution is stored in the second wood vinegar solution storage tank 33. Further, the wood gas in the second cooling device 30 is sent to the third gas transport pipe 41 by the suction blow 40 through the gas delivery section 35 and the second gas transport pipe 36 and is stored in the wood gas storage section 42. The
[0017]
The gas in the wood gas storage section 42 is discharged from the wood gas discharge section 44 and used as thermal energy of the dry distillation apparatus 10. During this time, cooling water is supplied from the cooling water supply pipe 16 to the dry distillation apparatus 10, and 4200 liters of 45 ° C. hot water can be taken out from the hot water outlet 17.
Methanol produced from the raw material of wood vinegar obtained by the above apparatus is clean energy, and if it is used as a fuel for a low pollution vehicle, it does not generate carbon dioxide even if it is burned. The plant tar produced from this wood vinegar stock solution can be used as a repellent for pests, ticks, birds, beasts and the like.
[0018]
In addition, the wood vinegar solution itself can be used to prevent soil and water pollution, as will be described later, and furthermore, as will be described later, pesticide-free and chemical-free fertilizer cultivation can be realized. High quality agricultural products can be obtained. Woody gas can be used as clean woody biomass energy, similar to methanol produced from wood vinegar.
[0019]
(Characteristics of wood vinegar)
The qualitative quantitative analysis results of the characteristics of the wood vinegar obtained in Example 1 are shown below.
The metal components (minerals) are as shown in Table 1.
[0020]
[Table 1]
Figure 0003609396
[0021]
Table 1 above was analyzed using an IPC emission spectrometer. In addition to the above elements, a small amount of A1, Cu, Ni, Ba is contained. The asterisk (*) is one of the three elements of fertilizer. All the elements in the above table are indispensable elements for plant growth.
Table 2 shows the components of organic substances.
[0022]
[Table 2]
Figure 0003609396
[0023]
Table 2 above was analyzed by high performance liquid chromatographic analysis. In addition to the organic substances, methanol and phenols were detected. The phenols contained in the dissolved tar are reduced in the tank during the brewing period.
[0024]
The inventor conducted a utilization experiment using a wood vinegar solution (hereinafter simply referred to as “wood vinegar”) obtained by the production system.
[0025]
(Use field of wood vinegar)
Due to the above-mentioned effects of the wood vinegar, it can be used in a wide range of fields.
[0026]
[Table 3]
Figure 0003609396
[0027]
【Example】
(Soil purification)
Then, the utilization technique regarding the soil purification which the inventor tried is demonstrated. Wood vinegar is known to be effective against nematodes in the soil, and organic acids such as formic acid act synergistically to neutralize soil destruction and improve the living environment of microorganisms and improve soil. It is effective for. In addition, it has been confirmed as a result of experiments that some of the written materials in the contaminated soil are separated and decomposed.
[0028]
Soil purification refers to separating and decomposing toxic substances in contaminated soil in a narrow sense, but in a broad sense also includes removing and containing treatment to prevent diffusion of contaminants into the surrounding soil and groundwater. It is.
Conventionally, measures such as excavation / carrying out, treatment with chemicals, separation of metals by electricity, and containment of the entire contaminated soil by concrete or rubber sheets have been taken for contaminated soil. Once soil is contaminated, it is characterized by its effects lasting unless it is purified. For these reasons, along with the environmental problems of soil contamination, the need for purification such as stricter regulations is increasing.
[0029]
Applicants, humans and animals harmless, there is no fear of the secondary and tertiary pollution, wood vinegar obtained in Example 1 of the low cost that allows only applied in the field (hereinafter conventional 50%) (E 2 pyroligneous that .) Soil purification using Soil) Soil purification improvement technology was developed.
This technology is a soil remediation / improvement technology based on natural providence. In other words, it is a purification and improvement technique with a low burden on the living environment, which is not an improvement method using a reaction with chemicals, which removes physically contaminated soil or gives a load (chemical) to the environment.
[0030]
As the means, the pyroligneous acid solution (raw solution) obtained by the production system is applied to the target soil. The application amount is 10 liters per square meter (10 liters per cubic meter is a guide). The spraying means may be any method such as a sprayer, but if there is a certain level of water pressure (water pressure of tap water), penetration into the soil is promoted. According to this measure, the running cost is not only reduced by 50 to 60% compared to the conventional purification system, but the application period is usually short, from 10 days to 1 month. Further, since the purification improvement application is performed by in-situ processing (processing at the contaminated position), it is not necessary to prepare large-scale equipment and equipment, and effective reuse after application and purification of contaminated soil is possible. Above all, this means not only prevents the spread of pollution, but also has the advantage that the purification action is sustained by a synergistic effect with the self-cleaning ability of the soil.
[0031]
Next, specific test examples are introduced.
[Test Example 1]
(Challenges of testing) Verification of soil remediation function of wood vinegar developed by the applicant Necessity of decontamination such as cyan and harmful metals (6 chromium, arsenic, mercury, lead) of human body.
(Sprinkling method) As described above (wood vinegar solution (stock solution) is 10 liters per square meter. The spraying means is a normal sprayer.
(Test soil collection location) Arakawa-ku, Tokyo U-Kankin Factory (Testing institution) Tokyo Environmental Measurement Center (6-43-9, Hisao Higashio, Arakawa-ku, Tokyo) Environmental measurer (Test method) Notification of Environment Agency No. 46 in 1991 Methods defined in the attached table. The standard value is based on Tokyo Metropolitan Government Notification No. 150 February 14, 2003. In the following tests, the test subjects, methods, testers, etc. are the same.
(Test results) As shown in Table 4 [0032]
[Table 4]
Figure 0003609396
[0033]
(Evaluation)
Lead and arsenic decreased significantly. All cyan, hexavalent chromium and total mercury were not detected. Lead was detected after processing.
[0034]
[Test Example 2]
(Test result) As shown in Table 5.
[0035]
[Table 5]
Figure 0003609396
[0036]
(Evaluation) All cyanide, lead, hexavalent chromium, arsenic and total mercury decreased significantly.
[0037]
[Test Example 3]
(Test result) As shown in Table 6.
[0038]
[Table 6]
Figure 0003609396
[0039]
In addition, 5 points were 4 points before processing. Of the four points, points not listed in the above table are No. 5 in Table 5. 3 soils.
[0040]
(Evaluation) It was found that all harmful substances are greatly reduced (purified).
(Comprehensive evaluation) E 2 wood vinegar liquid confirmed the saliency of purification of contaminated soil.
[0041]
【The invention's effect】
As can be understood from the above description, according to the present invention, by E 2 vinegar, it was confirmed saliency of contaminated soil remediation.
[Brief description of the drawings]
FIG. 1 is a conceptual diagram of an embodiment according to the present invention.
FIG. 2 is a conceptual longitudinal sectional view of a wood vinegar liquid production system used in the same example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Dry distillation apparatus 11 ... Chip inlet 13 ... 1st gas conveyance pipe 15 ... Charcoal extraction outlet 17 ... Hot water extraction outlet 20 ... 1st cooling device 23 ... 1st Wood vinegar storage tank 24 ... wood vinegar liquid outlet 26 ... second gas transport pipe 30 ... second cooling device 33 ... second wood vinegar liquid storage tank 34 ... wood vinegar liquid outlet 36・ Second gas transfer pipe 40 ... Suction blow

Claims (1)

土壌からシアン、ヒ素、六価クロム、水銀又は鉛を除去する土壌浄化材であって、金属成分としてFe、Na、K、Ca、Zn、Mn、Si、Mgを含有し、更に、有機物質として、酢酸、蟻酸、プロピオン酸、クエン酸をそれぞれ乾留手段により含有する木酢液を主成分とする土壌浄化材 A soil purification material that removes cyan, arsenic, hexavalent chromium, mercury or lead from soil, containing Fe, Na, K, Ca, Zn, Mn, Si, Mg as metal components, and further as an organic substance A soil purification material mainly composed of wood vinegar containing acetic acid, formic acid, propionic acid and citric acid by dry distillation means .
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CN104971938A (en) * 2015-07-03 2015-10-14 广东省生态环境与土壤研究所(广东省土壤科学博物馆) Iron based-humus composite material and application thereof in soil heavy metal pollution control
EP3649215A4 (en) * 2017-07-14 2021-04-07 Maneko, spol. S R.o. Reclamation of sandy soils under difficult climatic conditions

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JP4662546B2 (en) * 2005-03-30 2011-03-30 株式会社大林組 Purification method for contaminated soil
JP5176839B2 (en) * 2008-09-30 2013-04-03 栗田工業株式会社 Soil or slag treatment method
CN113787090B (en) * 2021-09-15 2023-06-30 山东创业环保科技发展有限公司 Method for repairing heavy metal pollution of soil by heat treatment method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104971938A (en) * 2015-07-03 2015-10-14 广东省生态环境与土壤研究所(广东省土壤科学博物馆) Iron based-humus composite material and application thereof in soil heavy metal pollution control
EP3649215A4 (en) * 2017-07-14 2021-04-07 Maneko, spol. S R.o. Reclamation of sandy soils under difficult climatic conditions

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