JP3672893B2 - Improved soil and method for producing the same - Google Patents
Improved soil and method for producing the same Download PDFInfo
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- JP3672893B2 JP3672893B2 JP2002167455A JP2002167455A JP3672893B2 JP 3672893 B2 JP3672893 B2 JP 3672893B2 JP 2002167455 A JP2002167455 A JP 2002167455A JP 2002167455 A JP2002167455 A JP 2002167455A JP 3672893 B2 JP3672893 B2 JP 3672893B2
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- soil
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- animal
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- Processing Of Solid Wastes (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Description
【0001】
【発明の属する技術分野】
本発明は、動植物残渣いわゆる生ゴミと建設土木残土を水洗し、砂利、砂を選別して得られる水分高含有率の泥漿物から製造される改良土壌及びその製造方法に関する。
【0002】
【従来の技術】
近年、土木、建築の発展に伴い、建設土木残土等を水洗し、砂利、砂を選別して得られる水分高含有率の泥漿物が大量に発生し、環境汚染の深刻な問題を提起している。また、砕石工業から発生する水洗泥土、石灰石の水洗汚泥土、河川、湖底、海洋浚渫作業によるヘドロ等は、泥漿状態のため、その処理は極めて困難である。
【0003】
従来、水分含有率の高いこれらの泥漿物の処理には、広大な場所と長時間をかけて、自然脱水したり、機械的に脱水していた。あるいは、石灰系やセメント系の固化材を直接混合して一部は利用されてはいるが、そのほとんどは、埋立て投棄したり焼却処分していた。しかしながら、これらの泥漿物は年々増加しており、投棄処分、焼却処分等では、処理しきれず、放置状態にされているのが実情である。
【0004】
これらの問題を解決するため、例えば、特開平8−229531号公報、特開平9−192635号公報、特開2000−5800号公報、特開2002−18500号公報に記載されているように、これらの産業廃棄物を減水、固化する技術が種々提案されている。
しかしながらこれらの技術により産業廃棄物を減水、固化しても、依然として産業廃棄物として残存してしまい、本質的な解決とはならない。
【0005】
一方、食文化の発展に伴い、一般家庭や飲食店等で発生する厨芥等の生ゴミや農業生産に伴う生ゴミ等の量も年々増加の一途を辿り、各地方公共団体においてその処理が大きな問題となっている。
こうした生ゴミを処理する技術も種々提案されている。例えば、実用新案登録第2514198号では、粉砕機が粉砕した厨芥等を脱水篭中に配置したフィルタで脱水することにより、排水は汚物を含まず公共の汚水処理場負担をかけることなく、粉砕された厨芥等も水分を含まないので、廃棄しても衛生的である技術を提案している。
【0006】
【発明が解決しようとする課題】
水分含有率の高い上記した泥漿物をその処理後も産業廃棄物として残存させないと共に、生ゴミも同時に処理することを目的とする。
【0007】
【課題を解決するための手段】
本発明者は、水分含有率の高い上記した泥漿物の処理方法について鋭意研究を重ねた結果、驚くべきことに、水分高含有率の泥漿物と生ゴミから改良土壌を製造して、水分高含有率の泥漿物と生ゴミを一挙に処理できることを見出し、本発明を完成するに到ったものである
【0008】
すなわち、本発明は、動植物残渣を洗浄、粉砕、脱水して、70〜95重量%の水分を含有する、粉砕された動植物残渣を製造する第1工程、砂利及び/又は砂を含有する建設土木残土を水洗し、砂利、砂を選別して得られる、80〜99重量%の水分を含有する泥漿物の水分含有量を低下せしめる第2工程、粉砕された動植物残渣と調整された水分を含有する泥漿物とを混合して含水土壌を製造する第3工程及び含水土壌を発酵処理する第4工程を含むことを特徴とする改良土壌の製造方法である。
【0009】
【発明の実施の形態】
本発明の改良土壌は、動植物残渣を洗浄、粉砕、脱水して、70〜95重量%の水分を含有する、粉砕された動植物残渣を製造する第1工程、砂利及び/又は砂を含有する建設土木残土を水洗し、砂利、砂を選別して得られる、80〜99重量%の水分を含有する泥漿物の水分含有量を低下せしめる第2工程、粉砕された動植物残渣と調整された水分を含有する泥漿物とを混合して含水土壌を製造する第3工程及び含水土壌を発酵処理する第4工程を経て製造される。
【0010】
本発明の第1工程において使用される動植物残渣(生ゴミ)とは、一般家庭や飲食店等で発生する厨芥等の生ゴミや農業生産に伴う生ゴミ等である。良質の土壌を得るためには、プラスチック容器、割り箸等は、分別除去するのが好ましい。
動植物残渣(生ゴミ)は、洗浄、粉砕、脱水される。実用新案登録第2514198号に基づく粉砕機(有限会社イシヅ製「コンドル1号生ゴミ粉砕器」)を好適に使用することができる。洗浄、粉砕、脱水された動植物残渣(生ゴミ)は、70〜95重量%の水分を含有する。
【0011】
本発明の第2工程において使用される砂利及び/又は砂を含有する建設土木残土を水洗し、砂利、砂を選別して得られる水分高含有率の泥漿物とは、各種建設残土を水洗し、砂利、砂を選別して得られる水分高含有率の泥漿物、泥水、石灰石又は砕石類の洗浄泥土水、砂利、砂を含有する河川、湖沼、海底からの採掘物を水洗し、砂利、砂を選別して得られる泥漿物等である。産業廃棄物に限らない。良質の改良土壌を得るためには、好ましくは、各種建設残土を水洗し、砂利、砂を選別して得られる泥漿物、泥水、石灰石又は砕石類の洗浄泥土水が使用される。この種の泥漿物は、80〜99重量%の水分を含有する。
この水分高含有率の泥漿物は、沈殿法等により容易に5〜20重量%の水分含有量に調整することができる。泥漿物の水分含有量の調整は、粉砕された動植物残渣(生ゴミ)の水分含有量に応じて行われる。
【0012】
本発明の第3工程では、粉砕された動植物残渣(生ゴミ)と調整された水分を含有する泥漿物とを混合、必要に応じて乾燥して含水土壌を製造する。調整された水分を含有する泥漿物に対して、粉砕された動植物残渣(生ゴミ)を0.5〜1.5の重量比、好ましくは0.8〜1.3の重量比で混合する。その際、混合物の水分含有量を40〜60重量%、好ましくは45〜55重量%になるように第2工程で泥漿物の水分含有量を調整する。混合は、加熱混合できる通常のキルンを用いて行うことができる。
【0013】
本発明の第4工程では、第3工程から含水土壌を発酵槽に排出し、10〜30日間、好ましくは15〜25日間、好気性雰囲気下に置いて発酵処理する。発酵槽には必要ならば脱臭装置を取り付けることができる。
【0014】
本発明による改良土壌は、育苗用土壌、枯れた土壌の強化土壌、ゴルフ場や公園等の芝養生用土壌等々、広い用途を有している。
【0015】
【実施例】
以下に本発明の構成を実施例により具体的に説明する。
プラスチック容器、割り箸等を除いた生ゴミを実用新案登録第2514198号に基づく粉砕機(有限会社イシヅ製「コンドル1号生ゴミ粉砕器」)で処理して、850kg(水分含有率87%)の粉砕された生ゴミを得た。
【0016】
建設残土を水洗し、砂利及び砂を選別して得られる泥漿物(含水率約94重量%)を沈殿沈降処理して水分含有量10%に調整した泥漿物876kg(1000リットル)を100m3のキルンに装入した。これに850kg(水分含有率87%)の粉砕された生ゴミ(1000リットル)を装入し、約5時間混合した。1726kg(水分含有率50重量%)の含水土壌を得た。
【0017】
この含水土壌をショベル付き発酵槽に排出し、1回/日の切返しを入れて、20日間、50リットル/m3・分の通気量で、発酵処理した。改良土壌1319kg(水分含有量36%)を得た。
得られた改良土壌中の成分は、以下のとおりである。
窒素含量 0.06%、リン酸含量 0.15%、カリウム含量 0.23%、有機炭素 0.95%
【0018】
【発明の効果】
本発明により得られる改良土壌は、栄養に富み、育苗用土壌、枯れた土壌の強化土壌、ゴルフ場や公園等の芝養生用土壌等々、広い用途を有している。また、本発明では、砂利及び/又は砂を含有する建設土木残土を水洗し、砂利、砂を選別して得られる水分高含有率の泥漿物及び生ゴミをその処理後も産業廃棄物として残存させることなく、有用な改良土壌として回収するものであって、環境汚染に対して画期的な意義を有するものである。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improved soil produced from sludge with a high water content obtained by washing animal and plant residues, so-called garbage and construction civil engineering residue, and selecting gravel and sand.
[0002]
[Prior art]
In recent years, with the development of civil engineering and architecture, a large amount of mud with a high water content obtained by washing the remaining soil of construction civil engineering, etc., and selecting gravel and sand has been raised, raising a serious problem of environmental pollution. Yes. In addition, flush mud generated from the crushed stone industry, limestone flush sludge, rivers, lake bottoms, sludge from offshore dredging work, etc. are in a mud state and are extremely difficult to treat.
[0003]
Conventionally, in the treatment of these sludges having a high water content, natural dehydration or mechanical dehydration has been performed over a large area and a long time. Alternatively, some lime-based and cement-based solidified materials are directly mixed and used, but most of them are dumped in landfills or incinerated. However, these muds are increasing year by year, and it is the actual situation that they cannot be treated in dumping disposal and incineration disposal and are left untreated.
[0004]
In order to solve these problems, for example, as described in JP-A-8-229531, JP-A-9-192635, JP-A-2000-5800, JP-A-2002-18500, Various techniques for reducing and solidifying industrial wastes have been proposed.
However, even if the industrial waste is reduced and solidified by these techniques, it still remains as industrial waste, which is not an essential solution.
[0005]
On the other hand, along with the development of food culture, the amount of garbage such as rice cakes generated in ordinary households and restaurants, etc., and garbage from agricultural production has been increasing year by year, and each municipality has a large amount of processing. It is a problem.
Various techniques for processing such garbage are also proposed. For example, in Utility Model Registration No. 2514198, wastewater does not contain filth and is crushed without placing a burden on the public sewage treatment plant by dewatering the slag etc. crushed by the pulverizer with a filter placed in the dewatering slag. Since potatoes do not contain moisture, they propose a technique that is sanitary even if discarded.
[0006]
[Problems to be solved by the invention]
An object of the present invention is not to leave the above-mentioned mud with a high water content as industrial waste even after the treatment, and to simultaneously treat raw garbage.
[0007]
[Means for Solving the Problems]
As a result of extensive research on the above-described method for treating mud with a high water content, the present inventor surprisingly produced improved soil from mud with a high water content and raw garbage, The present inventors have found that it is possible to process the content of mud and raw garbage at once, and have completed the present invention.
That is, the present invention is a construction civil engineering containing gravel and / or sand, which is a first step for producing a crushed animal and plant residue containing 70 to 95% by weight of water by washing, pulverizing and dehydrating the animal and plant residue. The second step of reducing the water content of mud containing 80 to 99% by weight of water obtained by washing the remaining soil with water and selecting the gravel and sand, containing crushed animal and plant residues and adjusted water It is the manufacturing method of the improved soil characterized by including the 4th process of mixing the 3rd process which manufactures a hydrous soil by mixing with the mud and the fermenting process of a hydrous soil.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
The improved soil of the present invention is a first step for producing a pulverized animal and plant residue by washing, pulverizing and dehydrating the animal and plant residue to contain 70 to 95% by weight of water, construction containing gravel and / or sand. The second step of reducing the water content of mud containing 80 to 99% by weight of water obtained by washing the civil engineering residual soil with water and selecting the gravel and sand, the ground animal and plant residue and the adjusted water content It is produced through a third step of producing a hydrous soil by mixing the contained mud and a fourth step of subjecting the hydrous soil to a fermentation treatment.
[0010]
The animal and plant residues (raw garbage) used in the first step of the present invention are raw garbage such as straw that is generated in general households, restaurants, etc., and raw garbage accompanying agricultural production. In order to obtain good-quality soil, it is preferable to separate and remove plastic containers, disposable chopsticks, and the like.
Animal and plant residues (raw garbage) are washed, crushed and dehydrated. A pulverizer based on Utility Model Registration No. 2514198 (“Condor No. 1 Garbage Crusher” manufactured by Ishimo Co., Ltd.) can be preferably used. Washed, ground and dehydrated animal and plant residues (garbage) contain 70 to 95% by weight of water.
[0011]
The construction civil engineering residual soil containing gravel and / or sand used in the second step of the present invention is washed with water, and the mud having a high water content obtained by selecting the gravel and sand is washed with various construction residual soil. , Gravel, high water content mud and mud, limestone or crushed stone washing mud, gravel, sand-containing rivers, lakes, mines from the sea floor, gravel, It is mud and so on obtained by sorting sand. It is not limited to industrial waste. In order to obtain good quality improved soil, it is preferable to use washed mud water of mud, mud, limestone or crushed stone obtained by washing various construction residual soil with water and selecting gravel and sand. This kind of mud contains 80-99% by weight of water.
This high moisture content mud can be easily adjusted to a water content of 5 to 20% by weight by a precipitation method or the like. Adjustment of the water content of the slurry is performed according to the water content of the pulverized animal and plant residue (raw garbage).
[0012]
In the third step of the present invention, pulverized animal and plant residues (garbage) and mud containing adjusted moisture are mixed and dried as necessary to produce a hydrous soil. The pulverized animal and plant residue (raw garbage) is mixed with the mud containing adjusted moisture at a weight ratio of 0.5 to 1.5, preferably 0.8 to 1.3. At that time, the water content of the slurry is adjusted in the second step so that the water content of the mixture is 40 to 60% by weight, preferably 45 to 55% by weight. Mixing can be performed using a normal kiln that can be heated and mixed.
[0013]
In the fourth step of the present invention, the water-containing soil is discharged from the third step into the fermenter and is subjected to fermentation treatment in an aerobic atmosphere for 10 to 30 days, preferably 15 to 25 days. If necessary, a deodorizer can be attached to the fermenter.
[0014]
The improved soil according to the present invention has a wide range of uses, such as soil for raising seedlings, soil for strengthening withered soil, soil for grass curing in golf courses and parks, and the like.
[0015]
【Example】
The configuration of the present invention will be specifically described below with reference to examples.
850 kg (moisture content: 87%) of raw garbage excluding plastic containers, disposable chopsticks, etc., treated with a crusher based on Utility Model Registration No. 2514198 Crushed raw garbage was obtained.
[0016]
Washed construction waste soil, gravel and mud漿物obtained by screening sand mud漿物876kg adjusted (about 94 wt% water content) precipitation sedimentation to moisture content of 10% (1000 liters) of 100 m 3 I loaded my kiln. To this, 850 kg (water content 87%) of ground garbage (1000 liters) was charged and mixed for about 5 hours. 1726 kg (water content 50% by weight) of water-containing soil was obtained.
[0017]
This water-containing soil was discharged into a fermenter with an excavator, turned over once / day, and fermented for 20 days with an aeration rate of 50 liters / m 3 · min. 1319 kg of improved soil (water content 36%) was obtained.
The components in the obtained improved soil are as follows.
Nitrogen content 0.06%, phosphoric acid content 0.15%, potassium content 0.23%, organic carbon 0.95%
[0018]
【The invention's effect】
The improved soil obtained by the present invention is rich in nutrients and has a wide range of uses, such as soil for raising seedlings, soil for forage withered soil, soil for grass curing in golf courses and parks, and the like. Moreover, in the present invention, gravel and / or construction civil engineering soil containing sand is washed with water, and gravel and sand are collected, and the moisture-containing mud and raw garbage remain as industrial waste after the treatment. It is collected as useful improved soil without causing it to have an epoch-making significance for environmental pollution.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002167455A JP3672893B2 (en) | 2002-06-07 | 2002-06-07 | Improved soil and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002167455A JP3672893B2 (en) | 2002-06-07 | 2002-06-07 | Improved soil and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2004008118A JP2004008118A (en) | 2004-01-15 |
| JP3672893B2 true JP3672893B2 (en) | 2005-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002167455A Expired - Lifetime JP3672893B2 (en) | 2002-06-07 | 2002-06-07 | Improved soil and method for producing the same |
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| JP (1) | JP3672893B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4565878B2 (en) * | 2004-04-19 | 2010-10-20 | 株式会社天地恩 | Production method of soil from garbage |
| CN118005459B (en) * | 2024-02-05 | 2024-11-19 | 中国海洋大学 | A method for resource utilization of deep-sea mining tailings cement based on thermal drying |
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| Publication number | Publication date |
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| JP2004008118A (en) | 2004-01-15 |
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