JP7305503B2 - Appropriateness evaluation method for waste treatment and waste insolubilization treatment method - Google Patents
Appropriateness evaluation method for waste treatment and waste insolubilization treatment method Download PDFInfo
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Description
本発明は、廃棄物の不溶化処理方法に関する。 The present invention relates to a waste insolubilization method.
廃棄物から、有害物質の溶出を抑制する処理方法として、不溶化材を混合する方法が知られている。
例えば、特許文献１には、Ｓｅ含有灰に第一塩鉄を添加、混練することにより、該Ｓｅ含有灰からのＳｅの溶出を防止するＳｅ含有灰の処理方法において、該Ｓｅ含有灰にアルカリを添加して該Ｓｅ含有灰をｐＨ１１以上とした後、ｐＨ１１以上を維持した状態で第一鉄塩の添加、混練を行うことを特徴とするＳｅ含有灰の処理方法が記載されている。
また、特許文献２には、重金属類を含む焼却灰、酸化マグネシウム含有物質、鉄化合物、及び水を含むことを特徴とする固化不溶化体が記載されている。該固化不溶化体は、重金属類を含む焼却灰を含むにもかかわらず、重金属類の溶出量が低く、土工資材として使用しても、土壌が重金属類によって汚染されるおそれがないものである。
As a treatment method for suppressing the elution of harmful substances from waste, a method of mixing an insolubilizing material is known.
For example, Patent Document 1 describes a method for treating Se-containing ash in which ferrous chloride is added to Se-containing ash and kneaded to prevent the elution of Se from the Se-containing ash. is added to make the Se-containing ash pH 11 or higher, and then a ferrous salt is added and kneaded while the pH is maintained at 11 or higher.
Further, Patent Document 2 describes a solidified insolubilized body characterized by containing incineration ash containing heavy metals, a magnesium oxide-containing substance, an iron compound, and water. Although the solidified insolubilized body contains incineration ash containing heavy metals, the amount of heavy metals eluted is low, and even if it is used as an earthwork material, there is no risk that the soil will be contaminated with heavy metals.
廃棄物には、様々な種類があり、廃棄物の種類やその成分組成によっては、不溶化処理の効果に違いが生じる場合がある。
本発明の目的は、廃棄物に含まれている重金属類を不溶化することができる方法を提供することである。
There are various types of waste, and the effect of insolubilization treatment may vary depending on the type of waste and its component composition.
An object of the present invention is to provide a method capable of insolubilizing heavy metals contained in waste.
本発明者は、上記課題を解決するために鋭意検討した結果、重金属類を含む廃棄物と、塩化第一鉄を主成分として含む重金属類不溶化材を混合して、廃棄物に含まれている重金属類を不溶化する方法であって、廃棄物の水硬率が０．２０～１０．０である方法によれば、上記目的を達成できることを見出し、本発明を完成した。
すなわち、本発明は、以下の［１］～［５］を提供するものである。
［１］ 重金属類を含む廃棄物と、塩化第一鉄を主成分として含む重金属類不溶化材を混合して、上記廃棄物に含まれている重金属類を不溶化する方法であって、上記廃棄物の水硬率が０．２０～１０．０であることを特徴とする廃棄物の不溶化処理方法。
［２］ 上記廃棄物が、該廃棄物の生成前の材料を６００～１，３００℃で加熱したことによって生成されたものである前記［１］に記載の廃棄物の不溶化処理方法。
［３］ 上記廃棄物に含まれる重金属類が、セレンまたはセレン化合物である前記［１］または［２］に記載の廃棄物の不溶化処理方法。
［４］ 上記重金属類不溶化材が、２０℃の条件下で、上記重金属類不溶化材と蒸留水を、質量比（塩化第一鉄／蒸留水）が１／１０となる量で混合し攪拌した後、３時間経過した際のｐＨが２．０～３．０であるものである前記［１］～［３］のいずれかに記載の廃棄物の不溶化処理方法。
［５］ 上記廃棄物の元素組成を測定して、上記廃棄物の水硬率を算出する水硬率算出工程と、上記廃棄物が、上記水硬率が０．２０～１０．０の範囲内であるという条件を満たしているかを調べて、上記廃棄物が上記条件を満たしている場合に、上記廃棄物を、上記重金属類不溶化材との混合による不溶化処理の対象物とし、上記廃棄物が上記条件を満たしていない場合に、上記廃棄物を、上記廃棄物単独では、上記重金属類不溶化材との混合による不溶化処理の対象物とはしないと判定する判定工程を含む、廃棄物の処理の適否の評価方法。
As a result of intensive studies to solve the above problems, the present inventor mixed a waste containing heavy metals with a heavy metals insolubilizing material containing ferrous chloride as a main component, and found that the waste contains The present inventors have found that the above objects can be achieved by a method for insolubilizing heavy metals, in which the hydraulic coefficient of the waste is 0.20 to 10.0, and have completed the present invention.
That is, the present invention provides the following [1] to [5].
[1] A method for insolubilizing heavy metals contained in the waste by mixing a waste containing heavy metals with a heavy metals insolubilizing agent containing ferrous chloride as a main component, the method comprising: A method for insolubilizing waste, wherein the hydraulic coefficient of the waste is 0.20 to 10.0.
[2] The waste insolubilization method according to [1] above, wherein the waste is produced by heating the material before producing the waste at 600 to 1,300°C.
[3] The waste insolubilization method according to [1] or [2] above, wherein the heavy metals contained in the waste are selenium or a selenium compound.
[4] The heavy metals-insolubilizing material was mixed and stirred under the condition of 20 ° C. in such an amount that the heavy metals-insolubilizing material and distilled water had a mass ratio (ferrous chloride/distilled water) of 1/10. The waste insolubilization method according to any one of the above [1] to [3], wherein the pH is 2.0 to 3.0 after 3 hours.
[5] a hydraulic coefficient calculation step of measuring the elemental composition of the waste and calculating the hydraulic coefficient of the waste; If the waste satisfies the condition, the waste is treated as an object for insolubilization by mixing with the heavy metal insolubilizing material, and the waste is If the above conditions are not met, the waste alone is not subject to insolubilization by mixing with the heavy metals insolubilizing material. compliance evaluation method.
本発明の方法によれば、廃棄物に含まれている重金属類を不溶化することができる。 According to the method of the present invention, heavy metals contained in waste can be insolubilized.
本発明の廃棄物の不溶化処理方法は、重金属類を含む廃棄物と、塩化第一鉄を主成分として含む重金属類不溶化材を混合して、上記廃棄物に含まれている重金属類を不溶化する方法であって、上記廃棄物の水硬率（Ｈ．Ｍ．）が０．２０～１０．０である方法である。
不溶化処理の対象となる重金属類としては、例えば、土壌汚染対策法（平成１５年）に規定されている第二種特定有害物質が挙げられ、具体的には、カドミウム及びその化合物、シアン化合物、六価クロム化合物、水銀及びその化合物、セレン及びその化合物、鉛及びその化合物、ひ素及びその化合物、ふっ素及びその化合物、および、ほう素及びその化合物が挙げられる。
重金属類の中でも、不溶化処理が難しく、比較的に問題となりやすい金属元素であるにもかかわらず、不溶化することができる観点から、セレンが好適である。
これらは、廃棄物中に、１種含まれていてもよく、２種以上含まれていてもよい。
In the waste insolubilization method of the present invention, a waste containing heavy metals is mixed with a heavy metal insolubilizing material containing ferrous chloride as a main component to insolubilize the heavy metals contained in the waste. The method, wherein the hydraulic modulus (H.M.) of the waste is 0.20 to 10.0.
Heavy metals to be insolubilized include, for example, Class II Specified Hazardous Substances stipulated in the Soil Contamination Countermeasures Act (2003). Specifically, cadmium and its compounds, cyanide compounds, Hexavalent chromium compounds, mercury and its compounds, selenium and its compounds, lead and its compounds, arsenic and its compounds, fluorine and its compounds, and boron and its compounds.
Among the heavy metals, selenium is suitable from the viewpoint of being able to be insolubilized, although it is a metal element that is difficult to be insolubilized and relatively likely to cause problems.
One of these may be contained in the waste, or two or more of them may be contained.
本明細書中、廃棄物とは、産業廃棄物または一般廃棄物をいう。
産業廃棄物とは、事業活動に伴って生じた廃棄物をいう。
産業廃棄物の例としては、生コンスラッジ、各種汚泥（例えば、下水汚泥、浄水汚泥、製鉄汚泥等）、建築廃材、コンクリート廃材、各種焼却灰（例えば、石炭灰、鶏糞灰、家畜糞灰、バイオマス灰、汚泥焼却灰）、鋳物砂、ロックウール、廃ガラス、高炉２次灰、各種副産物、未利用資源（使用されずに残存した材料等）等が挙げられる。
一般廃棄物とは、産業廃棄物以外の廃棄物をいう。
一般廃棄物の例としては、下水汚泥乾粉、都市ごみ焼却灰、貝殻等が挙げられる。
中でも、重金属類をより不溶化することができる観点から、廃棄物の生成前の材料（例えば、廃棄物が石炭灰であれば、石炭）を６００～１，３００℃（好ましくは６２０～１２５０℃、より好ましくは６５０～１，１００℃、特に好ましくは６５０～１，０００℃）で加熱したことによって生成された廃棄物が好適である。
As used herein, waste refers to industrial waste or general waste.
Industrial waste refers to waste generated from business activities.
Examples of industrial waste include raw concrete sludge, various sludges (e.g., sewage sludge, purified water sludge, steelmaking sludge, etc.), construction waste materials, concrete waste materials, various incineration ash (e.g., coal ash, chicken manure ash, livestock manure ash, biomass ash, sludge incineration ash), foundry sand, rock wool, waste glass, secondary blast furnace ash, various by-products, unused resources (materials left without being used, etc.), and the like.
Municipal waste refers to waste other than industrial waste.
Examples of general waste include dry powder of sewage sludge, incineration ash of municipal solid waste, shells, and the like.
Among them, from the viewpoint of being able to further insolubilize heavy metals, the material before the generation of waste (for example, coal if the waste is coal ash) is heated to 600 to 1,300 ° C. Waste produced by heating at 650 to 1,100° C. (more preferably 650 to 1,100° C., particularly preferably 650 to 1,000° C.) is suitable.
廃棄物の水硬率（Ｈ．Ｍ．）は、０．２０～１０．０、好ましくは０．２２～５．０、より好ましくは０．２４～３．０、特に好ましくは０．２６～２．０である。廃棄物の水硬率が０．２０未満であると、廃棄物からの重金属類の溶出量が大きくなる。廃棄物の水硬率が１０．０を超える場合、生石灰の残存量が過多となり、発熱や反応性の問題から、不溶化処理後の廃棄物を、土工資材等としての再利用する際に、その用途に制限が生じる場合がある。 The hydraulic modulus (H.M.) of the waste is 0.20 to 10.0, preferably 0.22 to 5.0, more preferably 0.24 to 3.0, particularly preferably 0.26 to 2.0. If the hydraulic coefficient of the waste is less than 0.20, the amount of heavy metals eluted from the waste increases. If the hydraulic coefficient of the waste exceeds 10.0, the residual amount of quicklime will be excessive, and due to the problems of heat generation and reactivity, when the waste after insolubilization treatment is reused as civil engineering materials, etc. Use may be restricted.
塩化第一鉄を主成分として含む重金属類不溶化材（以下、「重金属類不溶化材」ともいう。）とは、塩化第一鉄を、無水物換算で、好ましくは９０質量％以上、より好ましくは９５質量％以上、特に好ましくは９８質量％以上含むものである。
重金属類不溶化材は、２０℃の条件下で、重金属類不溶化材と蒸留水を、質量比（重金属類不溶化材／蒸留水）が１／１０となる量で混合し攪拌した後、３時間経過した際のｐＨが２．０～３．０（好ましくは２．１～２．９、より好ましくは２．２～２．８）であるものが好ましい。上記ｐＨが２．０未満の重金属類不溶化材は入手が困難である。また、不溶化処理にあたり、使用する設備に制約や制限が生じる場合がある。上記ｐＨが３．０以下であれば、廃棄物からの重金属類の溶出量がより小さくなる。
また、重金属類不溶化材に含まれる塩化第一鉄は、無水物であっても水和物（例えば、塩化第一鉄２水和物、塩化第一鉄４水和物）であってもよい。
A heavy metal insolubilizing material containing ferrous chloride as a main component (hereinafter also referred to as a “heavy metal insolubilizing material”) is preferably 90% by mass or more, more preferably 95% by mass or more, particularly preferably 98% by mass or more.
The heavy metals-insolubilizing material is mixed under the condition of 20 ° C. with a mass ratio (heavy metals-insolubilizing material/distilled water) of 1/10, and stirred for 3 hours. It is preferable that the pH is 2.0 to 3.0 (preferably 2.1 to 2.9, more preferably 2.2 to 2.8). It is difficult to obtain a heavy metal insolubilizer having a pH of less than 2.0. In addition, in the insolubilization treatment, restrictions and restrictions may arise on the equipment to be used. When the pH is 3.0 or less, the amount of heavy metals eluted from the waste becomes smaller.
In addition, the ferrous chloride contained in the heavy metal insolubilizing material may be an anhydride or a hydrate (e.g., ferrous chloride dihydrate, ferrous chloride tetrahydrate). .
また、塩化第一鉄を主成分として含む重金属類不溶化材は、廃棄物からの重金属類の溶出量がより小さくなる観点から粉粒状物であることが好ましい。
ここで、本明細書中、「粉粒状」とは、粉状の材料（０．１ｍｍ未満の粒度を有するもの；粉体）の集合体、粒状の材料（０．１ｍｍ以上の粒度を有するもの；粒体）の集合体、または、粉状の材料および粒状の材料を含む集合体の形態を有することを意味する。また、「粉粒状物」とは、粉体の集合体、粒体の集合体、または、粉体および粒体を含む集合体を意味する。さらに、「粒度」とは、粉体または粒体における最大寸法（例えば、断面がだ円である粒体においては、長軸の寸法をいう。）
In addition, the heavy metal insolubilizing agent containing ferrous chloride as a main component is preferably a powder or granular material from the viewpoint of reducing the amount of heavy metals eluted from the waste.
Here, in this specification, "powder and granular" means an aggregate of powdery materials (having a particle size of less than 0.1 mm; powder), granular materials (having a particle size of 0.1 mm or more ; granules), or having the form of aggregates containing powdery materials and granular materials. In addition, "powder or granular material" means an aggregate of powder, an aggregate of granules, or an aggregate containing powder and granules. Furthermore, "particle size" refers to the maximum dimension of powder or granules (for example, the major axis dimension of granules having an elliptical cross section).
重金属類を含む廃棄物１００質量部に対する、重金属類不溶化材の量（無水物換算）は、好ましくは０．１～２０質量部、より好ましくは０．５～１５質量部、さらに好ましくは、１～１２質量部、特に好ましくは２～１０質量部である。該量が０．１質量部以上であれば、重金属類の溶出をより抑制することができる。該量が２０質量部以下であれば、重金属類不溶化材にかかるコストの過度の上昇を防ぐことができる。 The amount of the heavy metal insolubilizing material (in terms of anhydride) is preferably 0.1 to 20 parts by mass, more preferably 0.5 to 15 parts by mass, and still more preferably 1 part by mass with respect to 100 parts by mass of waste containing heavy metals. to 12 parts by weight, particularly preferably 2 to 10 parts by weight. When the amount is 0.1 parts by mass or more, elution of heavy metals can be further suppressed. If the amount is 20 parts by mass or less, an excessive increase in the cost of the heavy metal insolubilizer can be prevented.
上述した廃棄物と塩化第一鉄を主成分として含む重金属類不溶化材を混合することによって、該廃棄物からの重金属類の溶出を抑制することができる。
本発明において、上述した廃棄物と重金属類不溶化材を混合する際に、重金属類の溶出をより抑制する観点から、軽焼マグネシア、軽焼マグネシアの部分水和物、軽焼ドロマイト、又は、軽焼ドロマイトの部分水和物を含む酸化マグネシウム含有物質、並びに、塩化第二鉄、硫酸第一鉄、硫酸第二鉄、ポリ硫酸第二鉄等の鉄化合物等の他の不溶化材（重金属類を不溶化しうるもの）を、さらに混合してもよい。
また、材料にかかるコストを低減する観点から、上述した他の不溶化材を使用せずに、重金属類不溶化材を単独で使用してもよい。
By mixing the above waste with a heavy metal insolubilizing material containing ferrous chloride as a main component, elution of heavy metals from the waste can be suppressed.
In the present invention, from the viewpoint of further suppressing the elution of heavy metals when mixing the above-described waste and heavy metal insolubilizer, light burnt magnesia, light burnt magnesia partial hydrate, light burnt dolomite, or light burnt Magnesium oxide-containing substances, including partial hydrates of calcined dolomite, and other insolubilizing agents such as iron compounds such as ferric chloride, ferrous sulfate, ferric sulfate, polyferric sulfate, etc. that can be insolubilized) may be further mixed.
Moreover, from the viewpoint of reducing the cost of materials, the heavy metals insolubilizing agent may be used alone without using the other insolubilizing agents described above.
また、不溶化処理後の廃棄物のｐＨを中性領域（例えば、５．８～８．６）とし、該廃棄物を、土工資材等としての再利用する際に、その用途に制限が生じないようにしたり、不溶化処理後の廃棄物を造粒する（粒度を大きくする）観点から、アルカリ性材料をさらに混合してもよい。
アルカリ性材料の例としては、各種セメント、消石灰、生石灰、石灰石粉末、高炉スラグ微粉末 等が挙げられる。これらは１種を単独で用いてもよく、２種以上を組み合わせて用いてもよい。
In addition, the pH of the waste after the insolubilization treatment is set to a neutral range (for example, 5.8 to 8.6), and when the waste is reused as civil engineering materials, etc., there are no restrictions on its use. Alternatively, an alkaline material may be further mixed from the viewpoint of granulating (increasing the particle size) the waste after the insolubilization treatment.
Examples of alkaline materials include various cements, slaked lime, quicklime, limestone powder, ground granulated blast furnace slag, and the like. These may be used individually by 1 type, and may be used in combination of 2 or more type.
上述した廃棄物の不溶化処理方法を行う前に、後述する水硬率算出工程と判定工程を含む廃棄物の処理の適否の評価方法を行ってもよい。該評価方法を予め行うことで、重金属類を含む廃棄物の効率的な不溶化処理を行うことができる。
［水硬率算出工程］
本工程は、重金属類を含む廃棄物の元素組成を測定して、該廃棄物の水硬率を算出する工程である。
［判定工程］
本工程は、上記廃棄物が、水硬率算出工程で得られた上記水硬率が０．２０～１０．０の範囲内であるという条件を満たしているかを調べて、上記廃棄物が上記条件を満たしている場合に、上記廃棄物を、重金属類不溶化材との混合による不溶化処理の対象物とし、上記廃棄物が上記条件を満たしていない場合に、上記廃棄物を、上記廃棄物単独では、重金属類不溶化材との混合による不溶化処理の対象物とはしないと判定する工程である。
本工程において、上記廃棄物を、上記廃棄物単独では、重金属類不溶化材との混合による不溶化処理の対象物とはしないとした場合、上記廃棄物に、他の種類の廃棄物等を添加し混合することで、混合後の廃棄物の水硬率が０．２０～１０．０の範囲内となるように調整したり、塩化第一鉄を主成分として含む重金属類不溶化材と、他の不溶化材（例えば、酸化マグネシウム含有物質）を組み合わせたうえで、不溶化処理を行ってもよい。
Before performing the waste insolubilization treatment method described above, a method for evaluating suitability of waste treatment including a hydraulic coefficient calculation step and a determination step, which will be described later, may be performed. By performing the evaluation method in advance, it is possible to efficiently insolubilize the waste containing heavy metals.
[Hydraulic coefficient calculation process]
This step is a step of measuring the elemental composition of the waste containing heavy metals and calculating the hydraulic modulus of the waste.
[Determination process]
In this step, the waste satisfies the condition that the hydraulic coefficient obtained in the hydraulic coefficient calculation step is within the range of 0.20 to 10.0. If the conditions are met, the waste is treated as an object to be insolubilized by mixing with a heavy metal insolubilizing material, and if the waste does not meet the above conditions, the waste is treated as the waste alone. Then, it is a step of judging that the object is not to be subjected to the insolubilization treatment by mixing with the heavy metal insolubilizing agent.
In this process, if the waste alone is not subject to the insolubilization treatment by mixing with the heavy metal insolubilizing material, other types of waste etc. are added to the waste. By mixing, the hydraulic coefficient of the mixed waste is adjusted to be within the range of 0.20 to 10.0, and the heavy metals insolubilizing material containing ferrous chloride as a main component and other The insolubilizing treatment may be performed after combining an insolubilizing material (for example, a substance containing magnesium oxide).
以下、本発明を実施例により具体的に説明するが、本発明はこれらの実施例に限定されるものではない。
［使用材料］
（１）廃棄物１～５：廃棄物生成前の材料を８００～１，０００℃で加熱してなるセレンを含む廃棄物、各廃棄物の水硬率、及び、環境省告示第１８号に準拠して測定した不溶化処理前の廃棄物からのセレンの溶出量を表１に示す。
（２）不溶化材１～２：塩化第一鉄を９８質量％以上含むもの、また、２０℃の条件下で、塩化第一鉄と蒸留水を、質量比（塩化第一鉄／蒸留水）が１／１０となる質量で混合し攪拌して検液を得た後、３時間経過した際の検液のｐＨを、「ＪＩＳ Ｋ ０１０２：２０１３（工場排水試験方法）」１２．１ガラス電極法に準拠して測定した結果を表１に示す。
EXAMPLES The present invention will be specifically described below by way of examples, but the present invention is not limited to these examples.
[Materials used]
(1) Waste 1 to 5: Waste containing selenium obtained by heating materials before waste generation at 800 to 1,000 ° C, hydraulic coefficient of each waste, and Ministry of the Environment Notification No. 18 Table 1 shows the eluted amount of selenium from the waste before the insolubilization treatment, which was measured according to the standard.
(2) Insolubilizing materials 1 and 2: those containing 98% by mass or more of ferrous chloride, and a mass ratio of ferrous chloride and distilled water at 20 ° C. (ferrous chloride/distilled water) After mixing and stirring at a mass of 1/10 to obtain a test solution, the pH of the test solution after 3 hours has passed, "JIS K 0102: 2013 (factory wastewater test method)" 12.1 Glass electrode Table 1 shows the results of measurements in accordance with the law.
［実施例１～３、比較例１～２］
表１に示す種類の廃棄物及び不溶化材を、廃棄物１００質量部に対して、不溶化材が５質量部となる量で、同時にホバート社製の縦型ミキサに投入した後、３分間混合して、不溶化処理を行った。
不溶化処理後の廃棄物からのセレンの溶出量を、環境省告示第１８号に準拠して測定した。結果を表１に示す。
[Examples 1-3, Comparative Examples 1-2]
The types of wastes and insolubilizing agents shown in Table 1 were simultaneously put into a vertical mixer manufactured by Hobart in an amount of 5 parts by mass of insolubilizing agents per 100 parts by mass of waste, and then mixed for 3 minutes. Then, an insolubilization treatment was performed.
The amount of selenium eluted from the waste after the insolubilization treatment was measured according to Notification No. 18 of the Ministry of the Environment. Table 1 shows the results.
表１から、実施例１～３（廃棄物のＨ．Ｍ．が０．２７～１．０９であるもの）では、不溶化処理後の廃棄物からのセレンの溶出量は、環境省告示第１８号で規定されたセレンの溶出基準値（０．０１ｍｇ／リットル以下）を満たしていることがわかる。
一方、比較例１～２（廃棄物のＨ．Ｍ．が０．０２～０．０８であるもの）では、不溶化処理後の廃棄物からのセレンの溶出量は、環境省告示第１８号で規定されたセレンの溶出基準値（０．０１ｍｇ／リットル以下）を満たしていないことがわかる。
From Table 1, in Examples 1 to 3 (the HM of the waste is 0.27 to 1.09), the elution amount of selenium from the waste after the insolubilization treatment is It can be seen that the selenium elution standard value (0.01 mg / liter or less) specified in the No. is satisfied.
On the other hand, in Comparative Examples 1 and 2 (the HM of the waste is 0.02 to 0.08), the amount of selenium eluted from the waste after the insolubilization treatment was It can be seen that the specified selenium elution standard value (0.01 mg/liter or less) is not satisfied.
Claims (5)
上記廃棄物が、上記水硬率が０．２０～１０．０の範囲内であるという条件を満たしているかを調べて、上記廃棄物が上記条件を満たしている場合に、上記廃棄物を、塩化第一鉄を主成分として含む重金属類不溶化材との混合による不溶化処理の対象物とし、上記廃棄物が上記条件を満たしていない場合に、上記廃棄物を、上記廃棄物単独では、上記重金属類不溶化材との混合による不溶化処理の対象物とはしないと判定する判定工程を含む、廃棄物の処理の適否の評価方法。 a hydraulic coefficient calculation step of measuring the elemental composition of the waste containing heavy metals and calculating the hydraulic coefficient of the waste;
It is checked whether the waste satisfies the condition that the hydraulic coefficient is within the range of 0.20 to 10.0, and if the waste satisfies the condition, the waste is The object to be insolubilized by mixing with a heavy metal insolubilizing material containing ferrous chloride as a main component , and if the waste does not meet the above conditions, the waste alone is treated with the heavy metal A method for evaluating the adequacy of waste treatment, including a determination step of determining that the waste is not subject to insolubilization treatment by mixing with a similar insolubilizing material.
上記判定工程において不溶化処理の対象物と判定した上記廃棄物と、上記重金属類不溶化材を混合して、上記廃棄物に含まれている重金属類を不溶化する廃棄物の不溶化処理方法。A waste insolubilization method for insolubilizing heavy metals contained in the waste by mixing the waste determined to be an object of insolubilization in the determination step and the heavy metals insolubilizing material.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003175370A (en) | 2001-12-12 | 2003-06-24 | Tokyo Metropolis | Method for treating ash containing heavy metal or the like |
| JP2007275868A (en) | 2006-03-15 | 2007-10-25 | Taiheiyo Cement Corp | Calcined product manufacturing method |
| JP2008049330A (en) | 2006-07-24 | 2008-03-06 | Taiheiyo Cement Corp | Manufacturing method of fired product |
| JP2012187515A (en) | 2011-03-10 | 2012-10-04 | Sumitomo Chemical Co Ltd | Scrubber and scrubber-equipped system for regenerating and recovering catalyst |
| JP2016169494A (en) | 2015-03-12 | 2016-09-23 | 有限会社将楽産業 | Manufacturing method of recycled civil engineering material, and recycled civil engineering material |
| JP2018158306A (en) | 2017-03-23 | 2018-10-11 | 太平洋セメント株式会社 | Solidification insolubilization body, and solidification insolubilization method |
Family Cites Families (2)
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| JPS55149673A (en) * | 1979-05-09 | 1980-11-21 | Ebara Infilco Co Ltd | Method for solidification treatment of impalpable powder waste containing heavy metal |
| JP3271534B2 (en) * | 1996-11-01 | 2002-04-02 | 栗田工業株式会社 | Method for treating ash containing lead, hexavalent chromium, arsenic and selenium |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003175370A (en) | 2001-12-12 | 2003-06-24 | Tokyo Metropolis | Method for treating ash containing heavy metal or the like |
| JP2007275868A (en) | 2006-03-15 | 2007-10-25 | Taiheiyo Cement Corp | Calcined product manufacturing method |
| JP2008049330A (en) | 2006-07-24 | 2008-03-06 | Taiheiyo Cement Corp | Manufacturing method of fired product |
| JP2012187515A (en) | 2011-03-10 | 2012-10-04 | Sumitomo Chemical Co Ltd | Scrubber and scrubber-equipped system for regenerating and recovering catalyst |
| JP2016169494A (en) | 2015-03-12 | 2016-09-23 | 有限会社将楽産業 | Manufacturing method of recycled civil engineering material, and recycled civil engineering material |
| JP2018158306A (en) | 2017-03-23 | 2018-10-11 | 太平洋セメント株式会社 | Solidification insolubilization body, and solidification insolubilization method |
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