JP2796564B2 - A system to purify groundwater in a waste landfill - Google Patents
A system to purify groundwater in a waste landfillInfo
- Publication number
- JP2796564B2 JP2796564B2 JP7023915A JP2391595A JP2796564B2 JP 2796564 B2 JP2796564 B2 JP 2796564B2 JP 7023915 A JP7023915 A JP 7023915A JP 2391595 A JP2391595 A JP 2391595A JP 2796564 B2 JP2796564 B2 JP 2796564B2
- Authority
- JP
- Japan
- Prior art keywords
- waste landfill
- waste
- layer
- water
- groundwater
- 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 - Fee Related
Links
- 239000002699 waste material Substances 0.000 title claims description 75
- 239000003673 groundwater Substances 0.000 title claims description 34
- 239000010410 layer Substances 0.000 claims description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 28
- 238000005086 pumping Methods 0.000 claims description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- 230000008595 infiltration Effects 0.000 claims description 8
- 238000001764 infiltration Methods 0.000 claims description 8
- 238000000746 purification Methods 0.000 claims description 7
- 238000010276 construction Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 239000010865 sewage Substances 0.000 claims description 4
- 239000002344 surface layer Substances 0.000 claims description 2
- 239000002759 woven fabric Substances 0.000 claims description 2
- 238000000354 decomposition reaction Methods 0.000 description 17
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 12
- 239000007789 gas Substances 0.000 description 9
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 8
- 241000196324 Embryophyta Species 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 244000005700 microbiome Species 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 241000894006 Bacteria Species 0.000 description 4
- 239000001569 carbon dioxide Substances 0.000 description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- -1 gravel Substances 0.000 description 4
- 239000005416 organic matter Substances 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000005056 compaction Methods 0.000 description 3
- 229910017604 nitric acid Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 241000219793 Trifolium Species 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003610 charcoal Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002440 industrial waste Substances 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 235000019645 odor Nutrition 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 244000025254 Cannabis sativa Species 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 241000607479 Yersinia pestis Species 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000010791 domestic waste Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000010169 landfilling Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000001546 nitrifying effect Effects 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000009967 tasteless effect Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Landscapes
- Processing Of Solid Wastes (AREA)
- Treatment Of Biological Wastes In General (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は、家庭廃棄物、産業廃
棄物及び建築廃材等から成る廃棄物埋立地盤の水質を改
善し、建設地に適した地盤を造成するために、廃棄物埋
立地盤内の地下水を浄化するシステムに関する。BACKGROUND OF THE INVENTION The present invention relates to a waste landfill site for improving the water quality of a waste landfill site composed of household waste, industrial waste and construction waste material, and for forming a ground suitable for a construction site. Related to a system for purifying groundwater in a building.
【０００２】[0002]
【従来の技術】廃棄物処理の基本は、可燃物にあっては
それを焼却したときに残る灰を棄却し、不燃物にあって
は、産業廃棄物や建築廃材及び生廃棄物等の生活廃棄物
を、堤防やシートパイル等で遮断した所定の場所に逐次
廃棄していき、埋立て許可された高さまで廃棄物が埋立
てられた後、最後に１メートル程度に覆土するという方
法をとっている。従って、このようにして廃棄された廃
棄物から成る地盤から発生する汚水やメタンガスの浄化
対策は、従来自然の有機分解作用に頼るのみであった。
従来の埋め立て方法にあっては、廃棄物は廃棄場に運
びこまれると、一応焼却して埋立てるのが常識である
が、搬入量が多いと焼却に時間がかかるので、多くは不
完全燃焼のまま堆積されている。従って、部分的に若干
でも酸素が補給される所は、未だ燃焼を続けており、ま
た、場所によっては長期間にわたってメタンガス（ＣＨ
4)が発生している所も多い。2. Description of the Related Art The basic principle of waste disposal is to discard combustible ash left after incineration, and to use non-combustible ash such as industrial waste, building waste and raw waste. Waste is disposed of in a predetermined place, which is cut off by a dike, sheet pile, etc., and after the waste is buried to the height allowed for land reclamation, the soil is finally covered to about 1 meter. ing. Therefore, measures for purifying sewage and methane gas generated from the ground composed of the waste thus discarded have conventionally only relied on natural organic decomposition.
In the conventional landfill method, it is common sense that waste is brought to a landfill and incinerated once for landfilling.However, large amounts of waste take time to incinerate, so most waste is incompletely burned. It is deposited as it is. Therefore, the part where oxygen is partially replenished is still burning, and the methane gas (CH 2
4 ) Many places have occurred.
【０００３】メタンガスはそれ自体、無味無臭無色であ
るので人体に害を与えないが、空気より軽いそのガス体
が豊富に途切れず湧出している所などは、この発生ガス
による温暖化現象により覆土の温度が著しく上昇した
り、また蠅の大発生或いは微生物の成育を促すという問
題もあるので、こう言ったことに対する対策が必要とな
る。また、上記のような廃棄物埋立地盤を公園緑地とし
て転用する場合、植生は必ず行われるが、廃棄物埋立地
盤から湧出する水は、塩分濃度が高く、黒色で異臭を放
つことが多いので、フィルターのようなもので浄化する
対策が必要となる。[0003] Methane gas itself is tasteless, odorless and colorless and does not harm the human body. However, in places where the gaseous substance, which is lighter than air, is abundantly flowing out, the earth is covered by the warming phenomenon caused by the generated gas. There is also a problem that the temperature of the water is remarkably increased, and a large outbreak of the fly or a growth of microorganisms is promoted. In addition, when the above-mentioned waste landfill is converted to park green space, vegetation is always performed, but the water that springs out of the waste landfill has a high salt concentration and often emits a black odor. It is necessary to take measures to purify with a kind of filter.
【０００４】従って従来の廃棄物処理のシステムは必ず
しも環境に優しい処理システムとは言いがたい。Therefore, the conventional waste treatment system is not necessarily an environmentally friendly treatment system.
【０００５】[0005]
【発明が解決しようとする課題】本発明の課題は、上記
のような欠点を排除し、投棄される廃棄物の有害物質、
害虫等の発生を誘発することのない、園緑地としてだけ
でなく建設用地としても利用可能であり、しかも周辺の
水質環境に悪影響を及ぼすことがない浄化された安全で
快適な地盤を造成するために、廃棄物埋立地盤内の地下
水を従来の方法よりも短期間で浄化するシステムを提供
することである。SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned drawbacks and eliminate the harmful substances contained in discarded waste.
To create a clean, safe and comfortable ground that does not induce the occurrence of pests, etc., can be used not only as a green space, but also as a construction site, and does not adversely affect the surrounding water environment. Another object of the present invention is to provide a system for purifying groundwater in a waste landfill in a shorter period of time than conventional methods.
【０００６】[0006]
【課題を解決するための手段】上記の課題は、本発明の
特許請求の範囲に記載の廃棄物埋立地盤内の地下水を浄
化するシステム、すなわち、海岸側に護岸構造物を建造
し、この護岸建造物から堆積される廃棄物から出る汚水
が地下に浸透しない不透水層を造成し、この不透水層上
に廃棄物が堆積され、堆積した廃棄物をその表層が陸側
の方向に幾分傾斜するように締固めることにより廃棄物
埋立地盤を造成し、この廃棄物埋立地盤の表層上を覆う
ようにして遮水層を敷設し、この遮水層の上に表土層を
造成し、この表土層により形成される地表面に地被植物
群を植えたこと、廃棄物埋立地盤の海岸側に不透水層内
に貫入するようにシートパイルを打設し、このシートパ
イルから陸側の廃棄物埋立地盤内に前記表土層とこの廃
棄物埋立地盤を貫通して不透水層の上表面の近傍または
不透水層まで達するように少なくとも２本の揚水井戸を
埋設し、これらの揚水井戸の少なくとも一つを地表面に
設置した放水用ポンプと連結し、前記ポンプの少なくと
も１台が噴水装置と連結したこと、及び表土層の陸側の
端部において廃棄物埋立地盤の上方に透水性の浸透池を
建造したこと、を特徴とする廃棄物埋立地盤内の地下水
を浄化するシステムによって達成できる。The object of the present invention is to provide a system for purifying groundwater in a waste landfill panel according to the present invention, that is, to construct a seawall structure on the coast side and to construct this seawall. Creates an impervious layer where the wastewater from the waste deposited from the building does not penetrate into the basement, deposits the waste on this impervious layer, and disposes the deposited waste in the direction of the land to the land side. A waste landfill is created by compacting it so that it slopes, a water barrier layer is laid so as to cover the surface of the waste landfill board, and a topsoil layer is created on this water barrier. Planting ground cover plants on the ground surface formed by the topsoil layer, placing a sheet pile on the shore side of the waste landfill so as to penetrate into the impermeable layer, and disposing of the land side from this sheet pile The topsoil layer and this waste landfill At least two pumping wells are buried so as to reach the vicinity of the upper surface of the impermeable layer or to the impermeable layer, and at least one of these pumping wells is connected to a water discharge pump installed on the ground surface, At least one of the pumps is connected to a fountain device and a permeable seepage pond is constructed above the waste landfill at the landside end of the topsoil. This can be achieved by a system for purifying groundwater.
【０００７】この発明による他の有利な構成は、特許請
求の範囲の従属請求項に記載されている。[0007] Further advantageous configurations according to the invention are set out in the dependent claims.
【０００８】[0008]
【作用】本発明による浄化システムにあって、廃棄物埋
立地盤の浄化の基本的な作用は以下の点にある。In the purification system according to the present invention, the basic operation of purifying the waste landfill is as follows.
【０００９】廃棄物埋立地盤内において、そのつき固め
により廃棄物の細菌による分解、いわゆる嫌気性分解が
進行しているこの廃棄物埋立地盤内を流れる水（汚泥
水）は揚水井戸に集水されて、放水ポンプによって表土
層の表面に汲み出される。その際、少なくとも１台のポ
ンプは噴水装置と連結されていて表土層４の表面の広範
囲にわたて汲み出された地下水が散布されることにより
曝気され、微生物による分解、いわゆる好気性分解が進
行する。そして、他方の揚水井戸からポンプで汲み上げ
られた汚水は垂れ流される。その際、水の或る部分は地
被植物群の根や葉に接触しながら、ゆっくりと浸透池へ
向かって表土層の中を流れていく。このとき、ミネラル
や窒素・リンは、成長養分として吸収される。吸収され
ない水の部分は、ゆるやかな勾配の遮水層の表面を流れ
−この場合によっては雨水も−、浸透池に流れ込み貯留
される。そして水はこの浸透池の底面から徐々に水が廃
棄物埋立地盤内に浸透していく。その際、浸透池は、そ
の底面上部には炭、砂利、活性炭、礫や織布等で構成さ
れており、これにより、 ・地下水からの悪臭の除去が行われ、 ・多孔質なため微生物の生息場所となり、 ・例えば活性炭を使用の際はその製造時のＰＨ調節によ
って目的とする菌類の働きを調節できる、 という働きを奏する。In the waste landfill, water (sludge water) flowing through the waste landfill, in which the decomposition of waste by bacteria, that is, anaerobic decomposition is progressing due to the compaction, is collected by a pumping well. Water is pumped out to the surface of the topsoil layer by a water discharge pump. At this time, at least one pump is connected to the fountain device, and is sprayed with groundwater pumped over a wide area of the surface of the topsoil layer 4 to be aerated, and decomposition by microorganisms, so-called aerobic decomposition, proceeds. I do. Then, the sewage pumped from the other pumping well is drained. At that time, some part of the water slowly flows through the topsoil layer toward the infiltration pond, while contacting the roots and leaves of the ground cover plants. At this time, minerals and nitrogen / phosphorus are absorbed as growth nutrients. The portion of the water that is not absorbed flows over the surface of the impermeable layer with a gentle slope, and in some cases also the rainwater, which flows into the seepage pond and is stored. Water gradually permeates into the waste landfill from the bottom of the infiltration pond. At that time, the infiltration pond is composed of charcoal, gravel, activated carbon, gravel, woven cloth, etc. at the upper part of the bottom, which removes odors from groundwater. It becomes a habitat. ・ For example, when activated carbon is used, the function of the target fungus can be adjusted by adjusting the pH at the time of production.
【００１０】以上の過程が繰り返えされて、嫌気性分解
と好気性分解が進行する。このとき発生するメタンガ
ス、硝酸及びアンモニアは、窒素ガス、二酸化炭素およ
び中性の水に変わる。同時に廃棄物埋立地盤も浄化され
る。The above processes are repeated, and anaerobic decomposition and aerobic decomposition progress. The methane gas, nitric acid and ammonia generated at this time are changed to nitrogen gas, carbon dioxide and neutral water. At the same time, the waste landfill will be purified.
【００１１】以下、本発明を図１及び図２に示した実施
例に基づき詳細に説明する。Hereinafter, the present invention will be described in detail with reference to the embodiment shown in FIGS.
【００１２】[0012]
【実施例】図１には、本発明による廃棄物埋立地盤２を
浄化するためのシステムを示している図である。1 is a diagram showing a system for purifying a waste landfill board 2 according to the present invention.
【００１３】図１において、透水性の、特に透水係数が
10-5〜10-7cm／秒のオーダーの地層１が選択される。こ
の地層は殆ど不透水性である。しかし、この不透水層１
表面に更に不透水シートで敷きつめれば、一層の遮水効
果が得られる。In FIG. 1, the permeability, in particular, the permeability
A stratum 1 on the order of 10 -5 to 10 -7 cm / sec is selected. This formation is almost impermeable. However, this impermeable layer 1
If the surface is further laid with a water-impermeable sheet, a further waterproof effect can be obtained.
【００１４】この不透水地層１の目的は、これからその
上に造成される廃棄物埋立地盤２から汚れた地下水１４
が地下に浸透して環境を汚染しなようにすることであ
る。この地層１の海岸側１３において廃棄物埋立地盤２
を区画するために護岸１７の施工が行われる。この護岸
１７に沿って、この不透水層１上に廃棄物が順次投棄さ
れ、堆積される。適宜な高さまで廃棄物を投棄したの
ち、先ずこの堆積した廃棄物の表層が陸側の方向に、本
実施例のように廃棄物埋立地盤２を沿岸部の護岸１７に
隣接して造成する場合、護岸１７側の端部が法面１６
（安定する勾配）を形成するように、および後に廃棄物
埋立地盤２中から汲あげられる地下水１４が、陸側１２
において本発明による浸透池７に到達するように幾分傾
斜して、例えば動圧密工法（特許1139553,1172644,実用
新案1487147,1487148)により締固めを行って廃棄物埋立
地盤２を造成する。この締固めにより廃棄物埋立地盤２
中の空気量が減り、廃棄物埋立地盤２は圧縮されるので
細菌による廃棄物の分解、いわゆる嫌気性分解に適した
地盤となる。The purpose of this impermeable formation 1 is to remove the dirty groundwater 14 from the waste landfill
Infiltrate underground to pollute the environment. On the shore side 13 of this stratum 1
The construction of the revetment 17 is performed in order to divide the seawall. Along the seawall 17, wastes are sequentially dumped and deposited on the impermeable layer 1. After dumping the waste to an appropriate height, first, when the surface layer of the deposited waste is formed in the direction of the land side, as in the present embodiment, the waste landfill board 2 is formed adjacent to the coastal seawall 17. The edge on the revetment 17 side is the slope 16
(Stabilized gradient) and groundwater 14 that is later pumped from the waste landfill 2
In this case, the waste landfill board 2 is formed by compacting by a slight inclination so as to reach the infiltration pond 7 according to the present invention, for example, by a dynamic compaction method (patents 1139553 and 1172644, utility models 1487147 and 1487148). By this compaction, waste landfill board 2
Since the amount of air inside is reduced, and the waste landfill 2 is compressed, the ground becomes suitable for the decomposition of waste by bacteria, that is, the so-called anaerobic decomposition.
【００１５】次に、不透水層１上に堆積され、締固めら
れた廃棄物埋立地盤を形成している廃棄物埋立地盤２の
表面一体に沿って一様に粘土質の土あるいはセメント系
改良土等を敷きつめた遮水層３を形成する。この遮水層
３は後に、地下水１４及び雨水の流出が可能な表面を形
成する。その際、地下水１４の浄化を効果的なものとす
るために、前記遮水層３上に適当な厚さの表土層４を設
けて芝等の地被植物を表土層４一面に植生する。この地
被植物群６は定期的に刈り取って乾燥、焼却処分され
る。Next, the clay soil or cement-based improvement is uniformly formed along the surface of the waste landfill disk 2 forming the compacted waste landfill disk deposited on the water-impermeable layer 1 and compacted. The impermeable layer 3 laid with soil or the like is formed. This impermeable layer 3 later forms a surface from which groundwater 14 and rainwater can flow out. At this time, in order to effectively purify the groundwater 14, a topsoil layer 4 having an appropriate thickness is provided on the impermeable layer 3, and ground covering plants such as turf are vegetated on the entire topsoil layer 4. This ground cover plant group 6 is periodically cut, dried and incinerated.
【００１６】次に、前記遮水層３の海岸側１３、または
必要ならば廃棄物埋立地盤２全体を囲むようにシートパ
イル８を前記不透水層１に対して垂直方向に不透水層１
の一部または全域に達するまで埋込み、地下水１４が周
囲に流出しないようにする。Next, the sheet pile 8 is placed perpendicularly to the water-impermeable layer 1 so as to surround the shore side 13 of the water-impermeable layer 3 or, if necessary, the entire waste landfill board 2.
Until the groundwater reaches a part or the entire area, so that the groundwater 14 does not flow out to the surroundings.
【００１７】そして廃棄物埋立地盤２内に、しかも上記
シートパイル８の海岸側１３で少なくとも２本の揚水井
戸９を井戸の底が前記廃棄物埋立地盤２の下層近傍、ま
たは場合によっては前記不透水層１まで達するように構
築する。この揚水井戸９の筒側面は、多孔質構造となっ
ており、そこから廃棄物埋立地盤２中の地下水１４が染
みだして揚水井戸９の底に溜まる。前記揚水井戸９は、
放水用ポンプ１０と結合され、溜まった地下水１４を上
記の地表面地被植物上に垂れ流しする。At least two pumping wells 9 are disposed in the waste landfill board 2 and on the shore side 13 of the sheet pile 8 so that the bottom of the well is in the vicinity of the lower layer of the waste landfill board 2 or, in some cases, in the above-mentioned area. It is constructed so as to reach the permeable layer 1. The cylindrical side surface of the pumping well 9 has a porous structure, from which groundwater 14 in the waste landfill board 2 seeps out and accumulates at the bottom of the pumping well 9. The pumping well 9
Combined with the water discharge pump 10, the accumulated groundwater 14 drips onto the above-ground ground cover plant.
【００１８】ここで使用する放水用ポンプ１０の動力源
には商用電力、発電機等の他に廃棄物埋立地盤２から発
生するメタンガスも使用できる。放水用ポンプ１０と結
合され、溜まった地下水１４を地表面５に放出する際、
各ポンプ１０の少なくとも１台からホースを経由して地
下水１４を噴水装置１１に送る。この噴水装置１１から
汲み上げられた地下水１４を噴出することにより地下水
１４の曝気を行い、地下水１４に空気中の酸素を含有さ
せることにより地下水１４をいわゆる好気性に改善す
る。前記噴水装置１１には、散水効果が高い回転式スプ
レーを備えたレインジェット・ロータリーポップアップ
スプレー等があり、揚水井戸９と前記浸透池７の中間部
分に設置すると好気性改善にとって最適である。As a power source of the water discharge pump 10 used here, methane gas generated from the waste landfill 2 can be used in addition to commercial power, a generator and the like. When discharging the accumulated groundwater 14 to the ground surface 5 by being combined with the water discharge pump 10,
At least one of the pumps 10 sends the groundwater 14 to the fountain device 11 via a hose. The groundwater 14 is aerated by ejecting the groundwater 14 pumped from the fountain device 11, and the groundwater 14 is made to be aerobic by containing oxygen in the air. The fountain device 11 includes a rain jet / rotary pop-up spray provided with a rotary spray having a high spraying effect, and is most suitable for improving aerobicity when installed at an intermediate portion between the pumping well 9 and the seepage pond 7.
【００１９】次に、地下水１４及び雨水が流れ込む浸透
池７を前記遮水層３の陸側１２に構築し、上記の揚水井
戸により汲み上げられた地下水１４及び雨水が貯水され
る。この浸透池７の側面及び底面７′には、石積み、ま
たは多孔質コンクリート構造とし、更に底面上部の表面
７″を砂利、礫、炭のような活性炭を敷きつめるか、あ
るいは織布を張架する。このような構成は上記の地下水
１４及び雨水の浄化以外に、この浸透池７のメンテナン
スを目的としている。Next, the infiltration pond 7 into which the groundwater 14 and the rainwater flow is constructed on the land side 12 of the impermeable layer 3, and the groundwater 14 and the rainwater pumped up by the pumping well are stored. On the side and bottom 7 'of the infiltration pond 7, a masonry or porous concrete structure is used, and the upper surface 7 "of the bottom is filled with activated carbon such as gravel, gravel or charcoal, or a woven fabric is stretched. Such a configuration is intended for maintenance of the seepage pond 7 in addition to the purification of the groundwater 14 and the rainwater.
【００２０】この浸透池７の側面及び底面を介して、更
に浄化されつつ地下水１４が再度廃棄物埋立地盤２中に
しみ込み、更なるこの廃棄物埋立地盤の浄化が行われ。
本発明によるこのような廃棄物埋立地盤の汚水浄化シス
テムによって、表土層４においては、有機物処理の主流
である好気性微生物によるいわゆる好気性分解が促進さ
れる。その結果、有機物の５０％は水（H2O)と二酸化炭
素（CO2)に、残りは新しい微生物の細胞物質になる。ま
た、同時に生成されるアンモニアは硝化菌の働きにより
硝酸(HNO3)になるが、反応の途中で水素イオンを発生す
るため強酸性となることが知られている。Through the side and bottom surfaces of the infiltration pond 7, the groundwater 14 permeates the waste landfill board 2 again while being further purified, and the waste landfill board is further purified.
The so-called aerobic decomposition by aerobic microorganisms, which is the mainstream of organic matter treatment, is promoted in the topsoil layer 4 by such a wastewater purification system for waste landfills according to the present invention. As a result, 50% of the organic matter becomes water (H 2 O) and carbon dioxide (CO 2 ), with the remainder being the cellular material of new microorganisms. It is known that ammonia produced at the same time becomes nitric acid (HNO 3 ) by the action of nitrifying bacteria, but becomes strongly acidic because hydrogen ions are generated during the reaction.
【００２１】一方、廃棄物埋立地盤２中においては、細
菌及び一部原生動物のような嫌気性微生物によるいわゆ
る嫌気性分解が促進される。その結果、有機物を酢酸な
どの有機酸とメタンガスや二酸化炭素などのガスに分解
する。更に、好気性分解により生成された硝酸は、嫌気
性状態では窒素ガスと水になる。そしてこの反応の過程
で水酸イオンを生じるため強アルカリ性となることが知
られている。On the other hand, so-called anaerobic decomposition by anaerobic microorganisms such as bacteria and some protozoa is promoted in the waste landfill 2. As a result, organic substances are decomposed into organic acids such as acetic acid and gases such as methane gas and carbon dioxide. Further, nitric acid generated by aerobic decomposition becomes nitrogen gas and water in an anaerobic state. It is known that hydroxyl ions are generated in the course of this reaction, and the reaction becomes strongly alkaline.
【００２２】また、以上により生成した窒素等は、植樹
された地被植物群６（芝生やクローバー）の成長成分と
して取り込まれ、二酸化炭素は、同じく前記地被植物群
６（芝生やクローバー）により酸素に変わる。The nitrogen and the like generated as described above are taken in as a growth component of the planted ground cover plant group 6 (grass and clover), and carbon dioxide is also released by the ground cover plant group 6 (lawn and clover). Turns into oxygen.
【００２３】以上の化学反応を簡単に化学式で表すと下
記のようになる。 有機物（ＣＨＯ）＋Ｎ→ＣＯ2 ＋Ｈ2O＋ＮＨ3 ＋Ｃ5H7NＯ2 （好気性分解） ＮＨ3 ＋Ｏ2 →ＮＯ- ＋Ｈ2O＋Ｈ+ →ＨＮＯ3 （好気性分解） ＨＮＯ3 ＋有機物→Ｎ2 ＋ＣＯ2 ＋Ｈ2O＋ＯＨ- （嫌気性分解） このように、好気性分解→嫌気性分解→好気性分解を繰
り返えすことにより、有機物は無害なガスとなるととも
に、水は中性（ＰＨ７）に近くなる。つまり、廃棄物埋
立地盤２中の有機物を除去し、無機物だけの安全で快適
な地盤にすることが可能となる。The above chemical reaction is simply represented by a chemical formula as follows. Organic substance (CHO) + N → CO 2 + H 2 O + NH 3 + C 5 H 7 NO 2 (aerobic decomposition) NH 3 + O 2 → NO − + H 2 O + H + → HNO 3 (aerobic decomposition) HNO 3 + organic substance → N 2 + CO 2 + H 2 O + OH - to (anaerobic decomposition) by thus to Kaee repeated aerobic decomposition → anaerobic decomposition → aerobic degradation, with organic matter it becomes harmless gas, water is close to neutral (PH7) Become. That is, the organic matter in the waste landfill 2 can be removed, and the ground can be made safe and comfortable with only inorganic matter.
【００２４】最終浄化された地下水１４は、水の状態に
応じて水処理施設で処理した後、河川や海１８に放流さ
れる。図２に上記、廃棄物埋立地盤中の水浄化システム
の実施例の平面図を示す。The finally purified groundwater 14 is treated in a water treatment facility according to the state of the water, and then discharged to a river or sea 18. FIG. 2 shows a plan view of an embodiment of the water purification system in the waste landfill area.
【００２５】[0025]
【発明の効果】以上説明したように、本発明の廃棄物埋
立地下水浄化システムは、簡単な設備で安全で快適な廃
棄物埋立地盤を周囲の水質環境に悪影響を及ぼすことな
く、しかも従来の方法よりも短期間に造成することがで
きる。As described above, the waste landfill sewage purification system according to the present invention is capable of providing a safe and comfortable waste landfill board with a simple facility without adversely affecting the surrounding water quality environment and using the conventional method. It can be created in a shorter period of time.
【図１】本発明によるシステム構成の断面図である。FIG. 1 is a sectional view of a system configuration according to the present invention.
【図２】図１に記載の廃棄物埋立地盤内の水浄化システ
ムの平面図である。FIG. 2 is a plan view of a water purification system in a waste landfill board shown in FIG. 1;
１ 不透水層 ２ 廃棄物埋立地盤 ３ 遮水層 ４ 表土層 ５ 地表面 ６ 地被植物群 ７ 浸透池 ８ シートパイル ９ 揚水井戸 10 ポンプ 11 噴水装置 12 陸側 13 海岸側 14 地下水 15 側壁 16 法面 17 護岸 18 海 19 山 20 不透水シート 21 汲み上げられた地下水の流れ方向 22 廃棄物埋立地盤中の地下水の流れ方向 Reference Signs List 1 impermeable layer 2 waste landfill layer 3 impermeable layer 4 topsoil layer 5 ground surface 6 ground cover group 7 seepage pond 8 sheet pile 9 pumping well 10 pump 11 fountain device 12 land side 13 coast side 14 groundwater 15 side wall 16 method Surface 17 Seawall 18 Sea 19 Mountain 20 Impermeable sheet 21 Flow direction of pumped ground water 22 Flow direction of ground water in waste landfill
Claims (5)
ステムにおいて、 海岸側（１３）に護岸構造物（１７）を建造し、この護
岸建造物から堆積される廃棄物から出る汚水が地下に浸
透しない不透水層（１）を造成し、この不透水層（１）
上に廃棄物が堆積され、堆積した廃棄物をその表層が陸
側（１２）の方向に幾分傾斜するように締固めることに
より廃棄物埋立地盤（２）を造成し、この廃棄物埋立地
盤（２）の表層上を覆うようにして遮水層（３）を敷設
し、この遮水層の上に表土層（４）を造成し、この表土
層（４）により形成される地表面（５）に地被植物群
（６）を植えたこと、 廃棄物埋立地盤（２）の海岸側（１３）に不透水層
（１）内に貫入するようにシートパイル（８）を打設
し、このシートパイル（８）から陸側（１２）の廃棄物
埋立地盤（２）内に前記表土層（４）とこの廃棄物埋立
地盤（２）を貫通して不透水層（１）の上表面の近傍ま
たは不透水層（１）まで達するように少なくとも２本の
揚水井戸（９）を埋設し、これらの揚水井戸（９）を地
表面（５）に設置した放水用ポンプ（１０）と連結し、
前記ポンプ（１０）の少なくとも１台が噴水装置（１
１）と連結したこと、 及び表土層（４）の陸側の端部において廃棄物埋立地盤
（２）の上方に透水性の浸透池（７）を建造したこと、
を特徴とする廃棄物埋立地盤内の地下水を浄化するシス
テム。In a system for purifying groundwater in a waste landfill, a seawall structure (17) is constructed on a coastal side (13), and sewage discharged from waste deposited from the seawall structure is placed underground. Create an impermeable layer (1) that does not penetrate, and
A waste landfill board (2) is formed by compacting the deposited waste on its surface so that its surface is slightly inclined toward the land side (12). A water-impervious layer (3) is laid so as to cover the surface layer of (2), a topsoil layer (4) is formed on the water-impervious layer, and a ground surface (4) formed by the topsoil layer (4) is formed. 5) The ground cover group (6) was planted, and the sheet pile (8) was placed on the shore side (13) of the waste landfill (2) so as to penetrate into the impermeable layer (1). From the sheet pile (8), into the landfill (2) on the land side (12), through the topsoil layer (4) and the waste landfill (2) and above the water-impermeable layer (1). At least two pumping wells (9) are buried near the surface or up to the impermeable layer (1), and these pumping wells (9) are Connect with the water discharge pump (10) installed in (5),
At least one of the pumps (10) is provided with a fountain device (1).
1) and the construction of a permeable seepage pond (7) above the waste landfill (2) at the landside end of the topsoil layer (4);
A system for purifying groundwater in a waste landfill.
埋立地盤（２）の下部表面との間に不透水性の不透水シ
ートが介在されていることを特徴とする請求項１に記載
の廃棄物埋立地盤内の地下水を浄化するシステム。2. An impermeable water-impermeable sheet is interposed between an upper surface of the water-impermeable layer (1) and a lower surface of the waste landfill board (2). A system for purifying groundwater in a waste landfill panel described in 1.
なっていることを特徴とする請求項１及び請求項２のい
ずれか一つに記載の廃棄物埋立地盤内の地下水を浄化す
るシステム。3. Purification of groundwater in a waste landfill site according to claim 1, wherein the side wall of each pumping well (9) has a porous structure. System to do.
流しにより放水が行われるように構成されていることを
特徴とする請求項１及び請求項２のいずれか一つに記載
の廃棄物埋立地盤内の地下水を浄化するシステム。4. The waste landfill according to claim 1, wherein at least one of the pumping wells (9) is configured to discharge water by draining. A system for purifying groundwater inside the building.
性炭及び織布もしくはこれらの少なくとも一つで構成さ
れていることを特徴とする請求項１及び請求項２のいず
れか一つに記載の廃棄物埋立地盤内の地下水を浄化する
システム。5. The method according to claim 1, wherein the upper part of the bottom of the infiltration pond is made of gravel, gravel, activated carbon and woven fabric or at least one of them. A system for purifying groundwater in a waste landfill panel described in 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7023915A JP2796564B2 (en) | 1995-02-13 | 1995-02-13 | A system to purify groundwater in a waste landfill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7023915A JP2796564B2 (en) | 1995-02-13 | 1995-02-13 | A system to purify groundwater in a waste landfill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08215691A JPH08215691A (en) | 1996-08-27 |
| JP2796564B2 true JP2796564B2 (en) | 1998-09-10 |
Family
ID=12123798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7023915A Expired - Fee Related JP2796564B2 (en) | 1995-02-13 | 1995-02-13 | A system to purify groundwater in a waste landfill |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2796564B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007270527A (en) * | 2006-03-31 | 2007-10-18 | Asahi Kasei Construction Materials Co Ltd | Pumping well embedding method |
-
1995
- 1995-02-13 JP JP7023915A patent/JP2796564B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08215691A (en) | 1996-08-27 |
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