JPH09248561A - Device for removing nitrate nitrogen and nitrite nitrogen in natural water - Google Patents
Device for removing nitrate nitrogen and nitrite nitrogen in natural waterInfo
- Publication number
- JPH09248561A JPH09248561A JP8891996A JP8891996A JPH09248561A JP H09248561 A JPH09248561 A JP H09248561A JP 8891996 A JP8891996 A JP 8891996A JP 8891996 A JP8891996 A JP 8891996A JP H09248561 A JPH09248561 A JP H09248561A
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- Prior art keywords
- natural water
- layer
- nitrogen
- water
- flow
- 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.)
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- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、河川水、湖沼水、
地下水等の自然水(水道水を除く)中に存在する硝酸性
窒素および亜硝酸性窒素を除去する装置に関する。TECHNICAL FIELD The present invention relates to river water, lake water,
The present invention relates to a device for removing nitrate nitrogen and nitrite nitrogen existing in natural water (excluding tap water) such as groundwater.
【0002】[0002]
【従来の技術】飲料水中には微量の硝酸性窒素および亜
硝酸性窒素が含まれている。これらは消化器系から吸収
され血液中のヘモグロビンの中に取込まれ、ヘモグロビ
ンは酸化されてメトヘモグロビンとなる。血中のメトヘ
モグロビンの濃度が10%以上になると酸素供給が少く
なった症状すなわちメトヘモグロビン血症をひき起す。
メトヘモグロビン血症は特に乳児がかかり易い。このた
め水道法に定められる水質基準やWHO飲料水ガイドラ
インでは硝酸性窒素および亜硝酸性窒素の合計は10m
g/l以下と規定されている。2. Description of the Related Art Drinking water contains trace amounts of nitrate nitrogen and nitrite nitrogen. These are absorbed from the digestive system and taken into hemoglobin in the blood, and hemoglobin is oxidized to methemoglobin. When the concentration of methemoglobin in the blood is 10% or more, a condition in which oxygen supply is low, that is, methemoglobinemia is caused.
Methemoglobinemia is especially predisposed to infants. For this reason, the total amount of nitrate nitrogen and nitrite nitrogen is 10 m according to the water quality standards stipulated by the Water Supply Act and WHO drinking water guidelines.
It is specified as g / l or less.
【0003】河川水、湖沼水、地下水等の自然水を水道
水源とする浄水場においては現在特に硝酸性窒素および
亜硝酸性窒素を減少させるため格別の方法は採られてい
ない。At a water purification plant using natural water such as river water, lake water, groundwater, etc. as a tap water source, no particular method is currently adopted to reduce nitrate nitrogen and nitrite nitrogen.
【0004】[0004]
【発明が解決しようとする課題】近年農耕地、果樹園、
牧草地等における窒素系肥料の施肥の増加と家庭排水の
土壌浸透処理の増加により多量の窒素化合物が自然水中
に供給される傾向にあり、その結果自然水中の硝酸性窒
素および亜硝酸性窒素の合計濃度も増大する傾向にあ
り、場所によっては上限基準濃度10mg/lをはるか
に超えて数十mg/lに達することもある。[Problems to be Solved by the Invention] Recently, agricultural land, orchards,
A large amount of nitrogen compounds tends to be supplied to natural water due to the increase of fertilizer application of nitrogen-based fertilizers in grasslands and the increase of soil infiltration treatment of domestic wastewater, and as a result, the nitrate nitrogen and nitrite nitrogen in natural water The total concentration also tends to increase, and in some places, the upper limit reference concentration of 10 mg / l is far exceeded and reaches several tens of mg / l.
【0005】このような高濃度の硝酸性窒素および亜硝
酸性窒素を経済的にかつ有効に除去する手段は現在存在
しない。したがって、このような場合には水源を放棄し
て他の場所に移す以外に対処する方法がないのが現状で
ある。There is currently no means for economically and effectively removing such high concentrations of nitrate and nitrite nitrogen. Therefore, in such a case, there is currently no way to deal with it other than to abandon the water source and move it to another place.
【0006】本発明は上記の事情にかんがみなされたも
のであって、簡単な構成であってしたがって低コストで
あり水道水源または井戸水等飲料水として使用される自
然水中の硝酸性窒素および亜硝酸性窒素を基準濃度に減
少させることができる装置を提供しようとするものであ
る。The present invention has been made in view of the above circumstances, has a simple structure and is therefore low in cost, and has nitrate nitrogen and nitrite properties in natural water used as drinking water such as tap water source or well water. It is an object of the present invention to provide a device capable of reducing nitrogen to a standard concentration.
【0007】[0007]
【課題を解決するための手段】本発明者は、上記目的を
達成するため実験と研究を重ねる中、石英斑岩の一種で
ある麦飯石を単独で、あるいは活性炭を併用して自然水
を通すと、意外なことに自然水中の硝酸性窒素および亜
硝酸性窒素を顕著に吸着し除去することを発見し本発明
に到達した。[Means for Solving the Problems] The present inventor, while carrying out experiments and research to achieve the above-mentioned object, passes natural water by mixing barley stone, which is a kind of quartz porphyry, alone or in combination with activated carbon. And, surprisingly, it was discovered that nitrate nitrogen and nitrite nitrogen in natural water were remarkably adsorbed and removed, and the present invention was reached.
【0008】すなわち、本発明の目的を達成する請求項
1の発明にかかる自然水中の硝酸性窒素および亜硝酸性
窒素を除去する装置は、一端および他端にそれぞれ自然
水の流入口および流出口を有し、該流入口と該流出口と
の間に、麦飯石の細片を堆積した麦飯石層を設けたこと
を特徴とするものである。That is, the apparatus for removing nitrate nitrogen and nitrite nitrogen in natural water according to the first aspect of the present invention, which achieves the object of the present invention, has natural water inlet and outlet at one end and the other end, respectively. And a barley stone layer in which fine pieces of barley stone are deposited is provided between the inflow port and the outflow port.
【0009】請求項2の発明にかかる装置は、一端およ
び他端にそれぞれ自然水の流入口および流出口を有し、
該流入口と該流出口との間に、粒状の活性炭を堆積した
活性炭層と、麦飯石の細片を堆積した麦飯石層とを設け
たことを特徴とするものである。The apparatus according to the invention of claim 2 has an inlet and an outlet for natural water at one end and the other end, respectively.
Between the inflow port and the outflow port, an activated carbon layer in which granular activated carbon is deposited and a bakuhanishi layer in which fine particles of bakuhanishi are deposited are provided.
【0010】請求項3の発明にかかる装置は、該麦飯石
層の上流側または下流側の少くとも一方に磁鉄鉱石の細
片を堆積した磁鉄鉱層を設けるとともにこの磁鉄鉱層を
磁化する磁石を配設したことを特徴とするものである。According to a third aspect of the present invention, there is provided a magnetite layer in which fine particles of magnetite ore are deposited on at least one of the upstream side and the downstream side of the barite stone layer and a magnet for magnetizing the magnetite layer is arranged. It is characterized by being installed.
【0011】[0011]
【作用】麦飯石は石英斑岩の一種で、白色部分、透明な
石英部分、緑色部分、褐色部分などの混合物であり、そ
の化学組成は無水ケイ酸(SiO2 )約70%および酸
化アルミニウム(Al2 O3 )約14%を主要成分と
し、その他酸化マグネシウム(MgO)、酸化カリウム
(K2 O)、酸化ナトリウム(Na2 O)、酸化カルシ
ウム(CaO)、酸化第1鉄(FeO)、酸化第2鉄
(Fe2 O3 )、化合水付着水(H2 O)、酸化チタン
(TiO2 )、無水リン酸(P2 O5 )、酸化マンガン
(MnO)を含有するものである。砕いて細片とした麦
飯石を通した水は腐りにくく、また健康上有益なミネラ
ルを水中に溶出する等の効用があることが知られてお
り、これらの理由で麦飯石が家庭で使用される場合があ
るが、麦飯石に自然水中の硝酸性窒素および亜硝酸性窒
素を顕著に吸着する効果があることはこれまでまったく
知られておらず、浄水場等自然水を水道水源として処理
する施設において硝酸性窒素および亜硝酸性窒素を除去
するために麦飯石が使用された例はない。[Function] Bakuhanishi is a kind of quartz porphyry, which is a mixture of white part, transparent quartz part, green part and brown part. Its chemical composition is about 70% silicic anhydride (SiO 2 ) and aluminum oxide ( Al 2 O 3 ) about 14% as a main component, and magnesium oxide (MgO), potassium oxide (K 2 O), sodium oxide (Na 2 O), calcium oxide (CaO), ferrous oxide (FeO), It contains ferric oxide (Fe 2 O 3 ), compounded water adhering water (H 2 O), titanium oxide (TiO 2 ), phosphoric anhydride (P 2 O 5 ), and manganese oxide (MnO). It is known that the water that has passed through the crushed pieces of barley stone is less likely to rot and has the effect of elution of minerals that are beneficial to health into the water. For these reasons, barley stone is used at home. However, it has not been known so far that barley stone has a significant effect of adsorbing nitrate nitrogen and nitrite nitrogen in natural water, and natural water such as water purification plants is treated as a tap water source. There is no example of using barite stone to remove nitrate nitrogen and nitrite nitrogen in a facility.
【0012】本発明は従来家庭で美味な水を味わうため
に使用される程度にしか使用されておらず、産業上はほ
とんど省みられることがなかった麦飯石に現在水道原水
の汚染物質として大きな問題になっている硝酸性窒素お
よび亜硝酸性窒素を驚くほど顕著に吸着除去するという
新規な用途があることを発見したことにもとずく用途発
明であり、水道原水となりまたは井戸水として使用され
る自然水の浄化のために極めて有用なものであり、社会
に対する貢献度は大きい。すなわち、従来硝酸性窒素お
よび亜硝酸性窒素の濃度が高いために水道水源として不
適なものとして放棄せざるを得なかった水源でも、本発
明の除去装置を採用することにより立派な水源として利
用することができるからである。The present invention has been used only to the extent that it is conventionally used to taste delicious water at home, and is a major pollutant of tap water currently used in barley rice stone, which has hardly been omitted industrially. It is a use invention based on the discovery that there is a novel use for adsorbing and removing the problematic nitrate nitrogen and nitrite nitrogen remarkably remarkably, and it is used as tap water or as well water It is extremely useful for purifying natural water and makes a great contribution to society. That is, even a water source that had to be abandoned as an unsuitable tap water source due to its high concentration of nitrate nitrogen and nitrite nitrogen is used as a respectable water source by adopting the removal device of the present invention. Because you can.
【0013】なお、本明細書において、「自然水」とは
河川水、湖沼水、地下水等水道水源または井戸水源等飲
料水の水源として使用される未処理または処理過程にあ
る水を意味し、塩素処理を含むすべての浄水処理が完了
し飲用可能な水として供給される水道水を含まない。In the present specification, "natural water" means water that is untreated or in the process of being used as a source of drinking water such as river water, lake water, tap water such as ground water, or well water source, Does not include tap water supplied as potable water after completion of all water purification treatment including chlorination.
【0014】請求項1記載の発明によれば、自然水を麦
飯石層に通すことにより、自然水中の硝酸性窒素および
亜硝酸性窒素を顕著に吸着除去し、その合計濃度を基準
濃度等所望の濃度に減少させることができる。According to the first aspect of the present invention, natural water is passed through the boiled stone layer to remarkably adsorb and remove nitrate nitrogen and nitrite nitrogen in the natural water, and the total concentration thereof is desired to be a reference concentration or the like. The concentration can be reduced.
【0015】請求項2記載の発明によれば、自然水を活
性炭層および麦飯石層に通すことにより、自然水中の硝
酸性窒素および亜硝酸性窒素を著るしく吸着除去するこ
とができる上に、有機物質、その他の不純物、カビ臭等
も併せて除去することができる。According to the second aspect of the present invention, by passing natural water through the activated carbon layer and the barley stone layer, nitrate nitrogen and nitrite nitrogen in natural water can be remarkably adsorbed and removed. It is also possible to remove organic substances, other impurities, musty odor, and the like.
【0016】請求項3記載の発明によれば、さらに磁石
によって磁化された磁鉄鉱層に自然水を通すことにより
硝酸性窒素および亜硝酸性窒素の除去は一層促進され
る。According to the third aspect of the invention, the removal of nitrate nitrogen and nitrite nitrogen is further promoted by passing natural water through the magnetite layer magnetized by the magnet.
【0017】[0017]
【発明の実施の形態】以下添付図面を参照して本発明の
実施の形態について説明する。図1は本発明の1実施形
態を示すもので、硝酸性窒素および亜硝酸性窒素除去装
置1は3基の同一構造の濾過槽2を管路3により縦続接
続してなるものである。Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows one embodiment of the present invention. A nitrate nitrogen and nitrite nitrogen removing apparatus 1 comprises three filtration tanks 2 having the same structure, which are cascade-connected by a pipe line 3.
【0018】各濾過槽2は上下が閉じられた円筒状に形
成されており、蓋部2aと底部2bを備え、蓋部2aに
自然水の流入口4を、底部2bに自然水の流出口5を有
している。濾過槽2内には不織布フィルター等のフィル
ター板6が上下方向に3段設けられており、これらフィ
ルター板6によって仕切られた空間内に上から粒状の活
性炭、麦飯石の細片および磁鉄鉱の細片がそれぞれ充填
堆積されて活性炭層7、麦飯石層8、磁鉄鉱層9が形成
されている。Each of the filtration tanks 2 is formed in a cylindrical shape whose upper and lower sides are closed and has a lid portion 2a and a bottom portion 2b. The lid portion 2a has a natural water inlet 4 and the bottom portion 2b has a natural water outlet. Have five. A filter plate 6 such as a non-woven fabric filter is provided in three stages in the up-down direction in the filtration tank 2. Granular activated carbon, barley stone particles, and magnetite fine particles are placed from above in a space partitioned by these filter plates 6. The pieces are respectively filled and deposited to form an activated carbon layer 7, a barley stone layer 8 and a magnetite layer 9.
【0019】また磁鉄鉱層9の上下のフィルター板6、
6上には図3に示す環状マグネット10、11が載置さ
れておりその磁力線により磁鉄鉱層9を磁化している。
各環状マグネット10、11はそれぞれの位置が上下方
向で一致するように位置決めされ、また各環状マグネッ
ト10、11はその磁力線の向きが互いに一致し、特に
水の流れに対し逆向きとなるように一致し、かつ磁力線
の方向が水の流れに沿うように配置されている。The filter plates 6 above and below the magnetite layer 9,
Ring magnets 10 and 11 shown in FIG. 3 are placed on the magnet 6, and the magnetite layer 9 is magnetized by the lines of magnetic force.
The respective annular magnets 10 and 11 are positioned so that their respective positions coincide with each other in the vertical direction, and the respective directions of the magnetic lines of force of the respective annular magnets 10 and 11 coincide with each other, and in particular, they are opposite to the flow of water. It is arranged so that the lines of magnetic force coincide with the flow of water.
【0020】この環状マグネット10、11の配置によ
り、環状マグネット10、11のそれぞれの磁力線は互
いに結合して増強し合い、特に上向き、すなわち水の流
れに沿いかつそれとは逆向きの均一で強力な磁場を形成
し、磁鉄鉱層9全体を強力に磁化する。Due to the arrangement of the annular magnets 10 and 11, the magnetic lines of force of the annular magnets 10 and 11 are coupled to each other to reinforce each other, and in particular, upward, that is, along the flow of water and in the opposite direction, it is uniform and strong. A magnetic field is formed to strongly magnetize the entire magnetite layer 9.
【0021】環状マグネット10、11は図3に示すよ
うに、中央に開口部12を有する円板の形状を呈し、そ
の外径および内径ならびに厚さは濾過槽2の寸法、必要
な磁場の強さおよび水の処理量等を考慮して適当な値に
設定される。また本実施例においては各環状マグネット
は単一の環状マグネットで構成されているが、これに代
えて、環状マグネット10、11のそれぞれを図4に示
すような大小2つの環状マグネット10a、10b(1
1a、11b)を同軸に配置することによって構成して
もよい。As shown in FIG. 3, the annular magnets 10 and 11 have the shape of a disc having an opening 12 at the center, and the outer diameter, inner diameter and thickness of the annular magnets 10 and 11 are the dimensions of the filtration tank 2 and the strength of the required magnetic field. And the amount of water to be treated are taken into consideration and set to an appropriate value. Further, in the present embodiment, each annular magnet is composed of a single annular magnet, but instead of this, each of the annular magnets 10 and 11 has two large and small annular magnets 10a and 10b (as shown in FIG. 4). 1
1a, 11b) may be arranged coaxially.
【0022】本装置の1番目の濾過槽2−1の自然水流
入口4には自然水流入管路12が接続される一方3番目
の濾過槽2−3の自然水流出口5には自然水流出管路1
4が接続されている。また1番目の濾過槽2−1の流出
口5は2番目の濾過槽2−2の流入口4と、また2番目
の濾過槽2−2の流出口4は3番目の濾過槽2−3の流
入口4と管路3によってそれぞれ接続されている。A natural water inflow conduit 12 is connected to the natural water inflow port 4 of the first filtration tank 2-1 of this apparatus, while a natural water outflow pipe is connected to the natural water outflow port 5 of the third filtration tank 2-3. Road 1
4 are connected. The outlet 5 of the first filtration tank 2-1 is the inlet 4 of the second filtration tank 2-2, and the outlet 4 of the second filtration tank 2-2 is the third filtration tank 2-3. Are connected by an inflow port 4 and a pipe line 3, respectively.
【0023】次にこの装置の動作について説明する。Next, the operation of this device will be described.
【0024】自然水流入管路12から1番目の濾過槽2
−1の流入口4に流入した自然水は活性炭層において有
機物質その他の不純物、カビ臭等が除去され、また硝酸
性窒素および亜硝酸性窒素も僅かではあるが除去され
る。The first filtration tank 2 from the natural water inflow conduit 12
The organic water and other impurities, mold odor, etc. are removed from the natural water flowing into the inflow port 4 of -1 in the activated carbon layer, and nitrate nitrogen and nitrite nitrogen are also removed to a small extent.
【0025】次に自然水はフィルター板6を通って下段
の麦飯石層8内に流入し、ここで硝酸性窒素および亜硝
酸性窒素のかなりの部分が麦飯石に吸着され自然水中か
ら除去される。Next, natural water flows through the filter plate 6 and into the lower boiled stone layer 8, where a considerable part of nitrate nitrogen and nitrite nitrogen is adsorbed by the boiled stone and removed from the natural water. It
【0026】自然水はさらにフィルター板6を通って下
段の磁鉄鉱層9に流入する。環状マグネット10、11
により磁化された磁鉄鉱層9を通過する自然水は活性化
されるとともにその中に残存していた硝酸性窒素および
亜硝酸性窒素のさらにかなりの部分が磁鉄鉱石細片に吸
着され自然水中から除去される。Natural water further flows into the lower magnetite layer 9 through the filter plate 6. Ring magnets 10 and 11
The natural water passing through the magnetite layer 9 magnetized by is activated and at the same time, a considerable part of the nitrate nitrogen and the nitrite nitrogen remaining therein is adsorbed by the magnetite ore fragments and removed from the natural water. To be done.
【0027】1番目の濾過槽2−1から流出した自然水
はさらに2番目の濾過槽2−2および3番目の濾過槽2
−3に順次通され、上記のプロセスを経て水中の硝酸性
窒素および亜硝酸性窒素が吸着除去されてしだいに減少
し、3番目の濾過槽2−3の流出口5から流出する自然
水中の硝酸性窒素および亜硝酸性窒素の濃度は所望の濃
度(たとえば10mg/l以下)に減少している。Natural water flowing out of the first filtration tank 2-1 is further filtered in the second filtration tank 2-2 and the third filtration tank 2
-3 through the above process, the nitrate nitrogen and the nitrite nitrogen in the water are adsorbed and removed through the above-mentioned process to gradually decrease, and the natural water in the natural water flowing out from the outlet 5 of the third filtration tank 2-3 is discharged. The concentrations of nitrate nitrogen and nitrite nitrogen have been reduced to the desired concentrations (eg 10 mg / l or less).
【0028】上記の例では、同一構造の濾過槽2を3基
用いているが、そのかわりに濾過槽1基のみを使用し、
内部に充填する活性炭、麦飯石、磁鉄鉱の量をそれぞれ
上記例の濾過槽3基分の合計量とし、マグネットも大型
のものを使用するようにしてもよい。In the above example, three filtration tanks 2 having the same structure are used, but instead, only one filtration tank is used,
The amounts of activated carbon, barley stone, and magnetite to be filled inside may be the total amounts for the three filtration tanks of the above example, and large magnets may be used.
【0029】また磁鉄鉱層を磁化する磁石としては、上
記の例における環状マグネット(10、11)のかわり
に他の磁石を使用することもできる。たとえば、図5に
示すように、全面に細かい通水孔(図示せず)が多数設
けられた円板状プラスチックプレート15において、該
プレートの中心を中心とする同心円上の中心角を120
°で3等分した位置に形成した3つの収納孔16に3個
の円板状のマグネット17を収納したものを使用するこ
ともできる。ただし上記実施形態において使用される図
3または図4に示す環状マグネット(10、11)は図
5に示すマグネットやその形の形状のマグネットに比べ
て、磁場の強さが同じとすると、硝酸性窒素および亜硝
酸性窒素の除去効率が良く、もっとも好ましいものであ
る。As the magnet for magnetizing the magnetite layer, another magnet may be used instead of the annular magnet (10, 11) in the above example. For example, as shown in FIG. 5, in a disk-shaped plastic plate 15 provided with a large number of fine water holes (not shown) on the entire surface, the central angle on a concentric circle centered on the center of the plate is 120.
It is also possible to use one in which three disk-shaped magnets 17 are housed in the three housing holes 16 formed at positions equally divided by three degrees. However, if the annular magnets (10, 11) shown in FIG. 3 or FIG. 4 used in the above embodiment have the same magnetic field strength as the magnets shown in FIG. It is the most preferable because it has good removal efficiency of nitrogen and nitrite nitrogen.
【0030】図2は本発明の他の実施形態を示すもの
で、硝酸性窒素および亜硝酸性窒素除去装置20は、上
下が閉じられた円筒状に形成された濾過槽22を備えて
おり、濾過槽22は蓋部22aに自然水の流入口24
を、底部22bに自然水の流出口25を有している。濾
過槽22内には不織布フィルター等のフィルター板26
が設けられており、これらフィルター板26によって仕
切られた中央部空間内に麦飯石の細片が充填堆積されて
麦飯石層28が形成されている。FIG. 2 shows another embodiment of the present invention, in which a nitrate nitrogen and nitrite nitrogen removing apparatus 20 is provided with a filter tank 22 formed in a cylindrical shape whose upper and lower sides are closed, The filtration tank 22 has a cover 22a with an inlet 24 for natural water.
The bottom 22b has an outlet 25 for natural water. A filter plate 26 such as a non-woven fabric filter is provided in the filtration tank 22.
Is provided, and the pieces of barley stone are filled and accumulated in the central space partitioned by the filter plates 26 to form the layer of barley stone 28.
【0031】この実施形態において、麦飯石層28の機
能は図1の実施形態とほぼ同一である。In this embodiment, the function of the barley stone layer 28 is almost the same as that of the embodiment of FIG.
【0032】図6は本発明の他の実施形態を示すもの
で、硝酸性窒素および亜硝酸性窒素除去装置30は、上
下が閉じられた円筒状に形成された濾過槽32を備えて
おり、濾過槽32は蓋部32aに自然水の流入口34
を、底部32bに自然水の流出口35を有している。濾
過槽32内には不織布フィルター等のフィルター板36
が設けられており、中央のフィルター板36によって仕
切られた上部空間内に粒状の活性炭が、また下部空間に
麦飯石の細片がそれぞれ充填堆積されて活性炭層37お
よび麦飯石層38が形成されている。FIG. 6 shows another embodiment of the present invention, in which the nitrate nitrogen and nitrite nitrogen removing device 30 is provided with a cylindrical filtration tank 32 whose upper and lower sides are closed. The filtration tank 32 has a lid portion 32a with an inlet 34 for natural water.
The bottom 32b has a natural water outlet 35. A filter plate 36 such as a non-woven fabric filter is provided in the filtration tank 32.
Is provided, and granular activated carbon is filled in the upper space partitioned by the central filter plate 36, and fine particles of barley stone are filled and accumulated in the lower space to form the activated carbon layer 37 and the barley stone layer 38, respectively. ing.
【0033】この実施形態において、活性炭層37およ
び麦飯石層38の機能は図1の実施形態とほぼ同一であ
る。図2または図6の実施形態を図1の実施形態と比較
すると、濾過槽の容積が同じであれば磁化された磁鉄鉱
層を備える図1の実施形態の方が硝酸性窒素および亜硝
酸窒素の除去率は高い。したがって図2または図6の実
施形態により図1の実施形態と同じ除去率を達成するた
めには濾過槽の容積を大きくするかまたは接続する濾過
槽の数を増やすことにより使用する活性炭および麦飯石
の量を増やす必要がある。In this embodiment, the functions of the activated carbon layer 37 and the barley stone layer 38 are almost the same as those of the embodiment of FIG. Comparing the embodiment of FIG. 2 or FIG. 6 with the embodiment of FIG. 1, the embodiment of FIG. 1 with a magnetized magnetite bed for the same volume of filter tank is more suitable for nitrate nitrogen and nitrogen nitrite. The removal rate is high. Therefore, in order to achieve the same removal rate as that of the embodiment of FIG. 1 according to the embodiment of FIG. 2 or FIG. 6, the activated carbon and barley stone used by increasing the volume of the filter tank or by increasing the number of filter tanks to be connected. Need to increase the amount of.
【0034】図1の実施形態において、磁鉄鉱層は麦飯
石層の下流側に設けられているが、これを麦飯石層の上
流側に設けてもよく、または上流側および下流側の双方
に設けてもよい。In the embodiment of FIG. 1, the magnetite layer is provided on the downstream side of the bakuhanishi layer, but it may be provided on the upstream side of the bakuhanishi layer, or on both the upstream side and the downstream side. May be.
【0035】また図1、図2または図6の実施形態にお
いて、硝酸性窒素および亜硝酸性窒素以外の自然水中の
各種不純物を除くため砂層、セラミック層等他の物質か
らなる濾過層を付加してもよい。In addition, in the embodiment of FIG. 1, FIG. 2 or FIG. 6, a filter layer made of other material such as a sand layer or a ceramic layer is added to remove various impurities in natural water other than nitrate nitrogen and nitrite nitrogen. May be.
【0036】また図1および図6の実施形態において
は、各層を1つの濾過槽2,32内に収容しているが、
各層をそれぞれ別個の容器内に分けて収容し、これら容
器を管路で順次接続するようにしてもよい。In the embodiment of FIGS. 1 and 6, each layer is contained in one filtration tank 2 or 32.
You may make it accommodate each layer separately in a separate container, and connect these containers sequentially by a pipeline.
【0037】図1に示す装置において、各円筒形濾過槽
2の内径を150mm、長さを1,000mm、流入口
4および流出口5の口径を13mmとして、各濾過槽2
の容積中活性炭層7が40%、麦飯石層8が40%、磁
鉄鉱層9が20%を占めるように活性炭、麦飯石および
磁鉄鉱を充填した。また環状マグネット10、11とし
ては図3に示す形状のもので外径100mm、内径50
mm、厚さ8mmのフェライト製環状マグネットを使用
した。In the apparatus shown in FIG. 1, each cylindrical filtration tank 2 has an inner diameter of 150 mm, a length of 1,000 mm, and an inlet 4 and an outlet 5 of 13 mm in diameter.
Activated carbon, barley stone and magnetite were filled so that the activated carbon layer 7 occupies 40%, the barley stone layer 8 occupies 40% and the magnetite layer 9 occupies 20% in the volume. The annular magnets 10 and 11 have the shape shown in FIG. 3 and have an outer diameter of 100 mm and an inner diameter of 50.
A ferrite annular magnet having a thickness of 8 mm and a thickness of 8 mm was used.
【0038】被処理水として硝酸性窒素および亜硝酸性
窒素の合計濃度が48.4mg/lの自然水(地下水)
を毎分10〜20lの流量で自然水流入管路12から濾
過槽2−1,2−2,2−3の順に通過させ自然水流出
管路14から排出した。各濾過槽の流出口5の下流側の
管路3中に設けた取水口から処理された自然水のサンプ
ルを取出し、その硝酸性窒素および亜硝酸窒素の合計濃
度を水質基準に関する法令に定められた方法により測定
した。その結果、各濾過槽2−1、2−2、2−3通過
後の硝酸性窒素および亜硝酸性窒素の合計濃度はそれぞ
れ35.6mg/l、12.5mg/l、不検出であ
り、10mg/l以下という合格基準濃度を完全に達成
することができることが判った。Natural water (groundwater) having a total concentration of nitrate nitrogen and nitrite nitrogen of 48.4 mg / l as water to be treated
At a flow rate of 10 to 20 liters per minute from the natural water inflow conduit 12 to the filtration tanks 2-1, 2-2, 2-3 in this order and discharged from the natural water outflow conduit 14. A sample of the treated natural water was taken from the water intake provided in the pipeline 3 on the downstream side of the outlet 5 of each filtration tank, and the total concentration of nitrate nitrogen and nitrogen nitrite was stipulated by the law concerning water quality standards. It measured by the method. As a result, the total concentration of nitrate nitrogen and nitrite nitrogen after passing through the respective filtration tanks 2-1, 2-2, 2-3 was 35.6 mg / l, 12.5 mg / l, respectively, and was not detected. It was found that the passing standard concentration of 10 mg / l or less can be completely achieved.
【0039】[0039]
【発明の効果】以上述べたように、請求項1記載の発明
によれば、自然水を麦飯石層に通すことにより、自然水
中の硝酸性窒素および亜硝酸性窒素を顕著に吸着除去
し、その合計濃度を基準濃度等所望の濃度に減少させる
ことができる。As described above, according to the invention described in claim 1, by passing natural water through the barley stone layer, nitrate nitrogen and nitrite nitrogen in natural water are remarkably adsorbed and removed, The total concentration can be reduced to a desired concentration such as a reference concentration.
【0040】請求項2記載の発明によれば、活性炭層お
よび麦飯石層に通すことにより、自然水中の硝酸性窒素
および亜硝酸性窒素を著るしく吸着除去することができ
る上に、有機物質その他の不純物、カビ臭等も併せて除
去することができる。According to the second aspect of the present invention, nitrate nitrogen and nitrite nitrogen in natural water can be adsorbed and removed remarkably by passing through the activated carbon layer and the barley stone layer. Other impurities and musty odor can also be removed.
【0041】請求項3記載の発明によれば、さらに磁石
によって磁化された磁鉄鉱層に自然水を通すことにより
硝酸性窒素および亜硝酸性窒素の除去は一層促進され
る。According to the third aspect of the invention, the removal of nitrate nitrogen and nitrite nitrogen is further promoted by passing natural water through the magnetite layer magnetized by the magnet.
【図1】本発明の一実施形態を模式的に示す図である。FIG. 1 is a diagram schematically showing an embodiment of the present invention.
【図2】本発明の他の実施形態を模式的に示す図であ
る。FIG. 2 is a diagram schematically showing another embodiment of the present invention.
【図3】図1に示す実施形態において使用される環状マ
グネットの一例を示す斜視図である。3 is a perspective view showing an example of an annular magnet used in the embodiment shown in FIG. 1. FIG.
【図4】環状マグネットの他の例を示す斜視図である。FIG. 4 is a perspective view showing another example of an annular magnet.
【図5】マグネットの他の例を示す斜視図である。FIG. 5 is a perspective view showing another example of a magnet.
【図6】本発明のさらに他の実施形態を模式的に示す図
である。FIG. 6 is a diagram schematically showing still another embodiment of the present invention.
2,20,30 濾過層 3 管路 4,24,34 自然水流入口 5,25,35 自然水流出口 6,26,36 フィルター板 7,27,37 活性炭層 8,28,38 麦飯石層 9 磁鉄鉱層 10,11 現状マグネット 2,20,30 Filtration layer 3 Pipe line 4,24,34 Natural water inlet 5,25,35 Natural water outlet 6,26,36 Filter plate 7,27,37 Activated carbon bed 8,28,38 Boiled stone bed 9 Magnetite Layer 10, 11 Current magnet
Claims (3)
口および流出口を有し、該流入口と該流出口との間に、
麦飯石の細片を堆積した麦飯石層を設けたことを特徴と
する自然水中の硝酸性窒素および亜硝酸性窒素を除去す
る装置。1. An inlet and an outlet of natural water are provided at one end and the other end, respectively, and between the inlet and the outlet,
An apparatus for removing nitrate nitrogen and nitrite nitrogen in natural water, which is provided with a layer of boiled stone on which fine pieces of boiled stone are deposited.
口および流出口を有し、該流入口と該流出口との間に、
粒状の活性炭を堆積した活性炭層と、麦飯石の細片を堆
積した麦飯石層とを設けたことを特徴とする自然水中の
硝酸性窒素をおよび亜硝酸性窒素を除去する装置。2. An inlet and an outlet of natural water are provided at one end and the other end, respectively, and between the inlet and the outlet,
An apparatus for removing nitrate nitrogen and nitrite nitrogen in natural water, characterized in that an activated carbon layer on which granular activated carbon is deposited and a barley stone layer on which pieces of barley stone are deposited are provided.
くとも一方に磁鉄鉱石の細片を堆積した磁鉄鉱層を設け
るとともにこの磁鉄鉱層を磁化する磁石を配設したこと
を特徴とする請求項1または2記載の装置。3. A magnetite layer in which fine particles of magnetite ore are deposited is provided on at least one of an upstream side and a downstream side of the bourneite layer, and a magnet for magnetizing the magnetite layer is provided. The apparatus according to 1 or 2.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8891996A JPH09248561A (en) | 1996-03-18 | 1996-03-18 | Device for removing nitrate nitrogen and nitrite nitrogen in natural water |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8891996A JPH09248561A (en) | 1996-03-18 | 1996-03-18 | Device for removing nitrate nitrogen and nitrite nitrogen in natural water |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH09248561A true JPH09248561A (en) | 1997-09-22 |
Family
ID=13956336
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8891996A Pending JPH09248561A (en) | 1996-03-18 | 1996-03-18 | Device for removing nitrate nitrogen and nitrite nitrogen in natural water |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH09248561A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100437989B1 (en) * | 2001-01-16 | 2004-06-26 | 장영기 | One body type filter for water filtration device |
KR100437990B1 (en) * | 2001-01-16 | 2004-06-26 | 장영기 | One body type filter for water filtration device |
US7427352B2 (en) | 2003-12-15 | 2008-09-23 | D20 Llc | Fluid purifier having magnetic field generation |
CN103523981A (en) * | 2013-10-29 | 2014-01-22 | 皖西学院 | Modularized multi-stage comprehensive water processor |
US9011693B2 (en) | 2004-12-15 | 2015-04-21 | Orica Australia Pty Ltd | Water polishing process |
-
1996
- 1996-03-18 JP JP8891996A patent/JPH09248561A/en active Pending
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100437989B1 (en) * | 2001-01-16 | 2004-06-26 | 장영기 | One body type filter for water filtration device |
KR100437990B1 (en) * | 2001-01-16 | 2004-06-26 | 장영기 | One body type filter for water filtration device |
US7427352B2 (en) | 2003-12-15 | 2008-09-23 | D20 Llc | Fluid purifier having magnetic field generation |
US9011693B2 (en) | 2004-12-15 | 2015-04-21 | Orica Australia Pty Ltd | Water polishing process |
CN103523981A (en) * | 2013-10-29 | 2014-01-22 | 皖西学院 | Modularized multi-stage comprehensive water processor |
CN103523981B (en) * | 2013-10-29 | 2015-10-14 | 六安市智奇工业设计有限公司 | A kind of modular multistage comprehensive water treatment equipment |
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