JP3475390B2 - Nitrate nitrogen denitrification substrate and its substrate - Google Patents
Nitrate nitrogen denitrification substrate and its substrateInfo
- Publication number
- JP3475390B2 JP3475390B2 JP15915899A JP15915899A JP3475390B2 JP 3475390 B2 JP3475390 B2 JP 3475390B2 JP 15915899 A JP15915899 A JP 15915899A JP 15915899 A JP15915899 A JP 15915899A JP 3475390 B2 JP3475390 B2 JP 3475390B2
- Authority
- JP
- Japan
- Prior art keywords
- sulfur
- nitrate nitrogen
- denitrification
- substrate
- parts
- 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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Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Biological Treatment Of Waste Water (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、水中よりの硝酸性
窒素の除去、即ち、脱窒による水質浄化に用いられる硝
酸性窒素脱窒基質並びに硝酸性窒素脱窒基質物に関する
ものである。TECHNICAL FIELD The present invention relates to a nitrate nitrogen denitrification substrate and a nitrate nitrogen denitrification substrate used for removing nitrate nitrogen from water, that is, for water purification by denitrification.
【０００２】[0002]
【従来の技術】合併浄化槽や終末下水処理場等における
原水中の有機物質を分解、無機化した後の硝酸性窒素に
ついては、ごく一部の施設では主に従属栄養性脱窒法に
より脱窒しているが、イニシャルコスト及びランニング
コストが嵩むうえ、設備の導入や維持管理が平易でない
ところから広く普及するまでには至っていない。2. Description of the Related Art Nitrate nitrogen after decomposing and mineralizing organic substances in raw water in combined septic tanks and end-of-life sewage treatment plants is denitrified mainly by heterotrophic denitrification at a few facilities. However, the initial cost and running cost are high, and the introduction and maintenance of equipment are not easy to reach widespread use.
【０００３】また、既に無機化された硝酸性窒素が排出
される農地の暗渠排水や圃場浸透水或いは養液栽培にお
ける排液等から効率良く安全、且つ安価に脱窒する方法
も確立されていない。Further, there has not been established a method for denitrifying efficiently, safely and inexpensively from the underdrain drainage of farmland from which mineralized nitrate nitrogen is discharged, the permeated water in the field or the drainage in the hydroponics. .
【０００４】そこで、本発明者は他の発明者と共に、主
に硫黄酸化細菌による独立栄養性脱窒を安全・確実・容
易に発現させることのできる微生物活性能付与組成物及
びその製造方法（特開平１１−２８５３７７号）と硝酸
性窒素脱窒基質（特開２０００−９３９９７号）を開発
した。Therefore, the present inventor, together with other inventors, is capable of safely, reliably and easily expressing autotrophic denitrification mainly by sulfur-oxidizing bacteria, and a method for producing the same (special feature). Kaihei 11-285377) and a nitrate nitrogen denitrifying substrate (JP 2000-93997 A) were developed.
【０００５】これらの発明は、硫黄酸化細菌等の栄養源
である硫黄と菌体合成に必要な炭素源を単一の体内に有
効な状態で共存させたうえ、硫黄の酸化により発生する
硫酸を効率良く瞬時に中和することで脱窒能の低下も抑
制でき、しかも脱窒処理は開発品の粒子間を自然通水す
るだけで完了し、且つ処理水は直接外界へ放流すること
が可能な画期的なものである。According to these inventions, sulfur, which is a nutrient source for sulfur-oxidizing bacteria, and a carbon source necessary for cell synthesis are allowed to coexist in a single body in an effective state, and sulfuric acid generated by sulfur oxidation is added. Efficient and instantaneous neutralization can also suppress the decrease in denitrification capacity, and denitrification can be completed by simply passing water between particles of the developed product, and the treated water can be directly discharged to the outside world. It is an epoch-making thing.
【０００６】[0006]
【発明が解決しようとする課題】本発明は、硫黄を摂取
・利用して脱窒を行う細菌及び／または微生物に効率良
く利用され、脱窒能の低下がほとんど見られず、処理水
のｐＨはほぼ中性で環境制限因子が発生せず、且つ燃焼
し易い硫黄を多く含みながら脱窒効果を低下させずに難
燃化し、必要に応じて処理水中にマグネシウムや鉄を適
量溶存させることができる硝酸性窒素脱窒基質を提供す
ることを目的とする。DISCLOSURE OF THE INVENTION The present invention is efficiently used by bacteria and / or microorganisms that perform denitrification by ingesting and using sulfur, and the denitrification ability is hardly reduced, and the pH of treated water is reduced. Is almost neutral, does not generate environmental limiting factors, and contains a large amount of sulfur that is easy to burn, but it does not reduce the denitrification effect and makes it flame-retardant. If necessary, it can dissolve magnesium and iron in appropriate amounts in treated water. It is intended to provide a nitrate nitrogen denitrifying substrate that can be formed.
【０００７】また、本発明は、あらかじめ硝酸性窒素脱
窒基質に定着させた菌体を用意することで、より一層速
やかな脱窒を容易に開始することのできる硝酸性窒素脱
窒基質物を提供することを目的とする。In addition, the present invention provides a nitrate nitrogen denitrification substrate which can easily start denitrification more rapidly by preparing cells that have been fixed in advance on the nitrate nitrogen denitrification substrate. The purpose is to provide.
【０００８】[0008]
【課題を解決するための手段】本発明の請求項１に係る
硝酸性窒素脱窒基質においては、カルシウム及び／また
はマグネシウムの炭酸塩を主成分とする物質と硫黄とに
加え、水酸化アルミニウム，バーミキュライト精石，硅
酸質岩石粉末のいずれかの難燃化材料が単一の体内に共
存し、硫黄をバインダーとする粒状または塊状の固形物
として構成されている。In the nitrate nitrogen denitrifying substrate according to claim 1 of the present invention, in addition to a substance containing calcium and / or magnesium carbonate as a main component and sulfur, aluminum hydroxide , Vermiculite fine stone, silica
A flame-retardant material of any one of acid rock powders coexists in a single body, and is constituted as a granular or agglomerated solid substance using sulfur as a binder .
【０００９】本発明の請求項２に係る硝酸性窒素脱窒基
質においては、カルシウム及び／またはマグネシウムの
炭酸塩を主成分とする物質と硫黄とに加え、水酸化アル
ミニウム，バーミキュライト精石，硅酸質岩石粉末のい
ずれかの難燃化材料と、鉄及び／または鉄化合物とが単
一の体内に共存し、硫黄をバインダーとする粒状または
塊状の固形物として構成されている。In the nitrate nitrogen denitrifying substrate according to the second aspect of the present invention, in addition to the substance containing calcium and / or magnesium carbonate as the main component and sulfur, there is added an aluminum hydroxide.
Mineral , vermiculite refined stone, and siliceous rock powder flame-retardant material and iron and / or iron compound coexist in a single body, and it is composed as a granular or lumpy solid with sulfur as a binder Has been done.
【００１０】本発明の請求項３に係る硝酸性窒素脱窒基
質物においては、請求項１または２に記載の硝酸性窒素
脱窒基質に、硫黄酸化細菌のような脱窒に与かる細菌や
微生物を定着し、それら菌体の増殖及び被処理水からの
脱窒の容易な粒状または塊状の固形物として構成されて
いる。In the nitrate-nitrogen-denitrifying substrate according to claim 3 of the present invention, the nitrate-nitrogen-denitrifying substrate according to claim 1 or 2 is a bacterium that is involved in denitrification, such as sulfur-oxidizing bacteria. It is constituted as a granular or lumpy solid substance on which the microorganisms are fixed and the microbial cells easily grow and are easily denitrified from the water to be treated.
【００１１】[0011]
【発明の実施の形態】本発明の実施の形態に係る硝酸性
窒素脱窒基質は、カルシウム及び／またはマグネシウム
の炭酸塩を主成分とする物質と硫黄とに加え、難燃化材
料が単一の体内に共存し、硫黄をバインダーとする粒状
または塊状の固形物として構成されている。BEST MODE FOR CARRYING OUT THE INVENTION The nitrate nitrogen denitrifying substrate according to the embodiment of the present invention comprises a substance containing a carbonate of calcium and / or magnesium as a main component and sulfur, and a single flame-retardant material. It coexists in the body and is constituted as a granular or lumpy solid substance using sulfur as a binder .
【００１２】但し、脱窒菌体合成に係る炭素源が被処理
水中に十分存在している場合には、カルシウム及び／ま
たはマグネシウムの炭酸塩にかかわらず、難燃性でアル
カリ性を示す物質と硫黄とを主要組成とすることができ
る。また、処理水中に鉄の補給が必要であれば、鉄及び
／または鉄化合物を共存させることができる。However, when the carbon source for synthesizing the denitrifying bacteria is sufficiently present in the water to be treated, regardless of the calcium and / or magnesium carbonate, a flame-retardant and alkaline substance and sulfur. Can be the main composition. Further, iron and / or an iron compound can be made to coexist if supplemental iron is required in the treated water.
【００１３】その硝酸性窒素脱窒基質の組成物中で、カ
ルシウム及び／またはマグネシウムの炭酸塩を主成分と
する物質としては、炭酸カルシウム、炭酸マグネシウム
カルシウム、炭酸マグネシウム、石灰岩、結晶質石灰
岩、苦灰岩、結晶質苦灰岩、貝類の殻、貝化石、卵殻、
サンゴ、コーラルサンド、貝類の殻・卵殻以外の石灰質
殻、貝化石以外の石灰質化石を用いることができる。In the composition of the nitrate-nitrogen-denitrifying substrate, substances containing calcium and / or magnesium carbonate as a main component include calcium carbonate, magnesium carbonate calcium, magnesium carbonate, limestone, crystalline limestone, and bitumen. Ashstone, crystalline dolomite, shellfish, shell fossil, eggshell,
Coral, coral sand, calcareous shells other than shells and eggshells, and calcareous fossils other than shell fossils can be used.
【００１４】難燃化材料には、水酸化アルミニウム，そ
の他の有害物質を含まない樹脂の難燃剤、バーミキュラ
イト精石、硅酸質岩石粉末のいずれかが用いられる。こ
の中で、バーミキュライト精石は、いわゆる加水黒雲母
や苦土蛭石等の、３５０℃程度以上の加熱により水蒸気
を発生し伸長する雲母質鉱物の原石または伸長しない程
度に乾燥処理を施したものを指し、一種類の限定した鉱
物種を示すものではない。The flame-retardant material is aluminum hydroxide or the like.
Any of flame retardants of resins containing no other harmful substances , vermiculite refined stone, and silicate rock powder are used. Among them, vermiculite fine stones are so-called hydrobiotite, magnesia vermiculite, etc. , And does not represent a single limited mineral species.
【００１５】鉄及び／または鉄化合物としては、有害金
属等の溶出が水質環境基準値未満である鉄粉末、硫化鉄
粉末、酸化鉄粉末を用いることができる。As the iron and / or iron compound, iron powder, iron sulfide powder, and iron oxide powder in which elution of harmful metals and the like is less than the water quality environmental standard value can be used.
【００１６】粒状または塊状の固形物としては、カルシ
ウム及び／またはマグネシウムの炭酸塩を主成分とする
物質と硫黄とをできるだけ均質となるよう混合し、更
に、難燃化材料や鉄化合物も可能な限り均等に分散する
よう添加混合し、硫黄を１１２〜１９０℃程度の温度で
加熱溶融した後に急冷固化した固化物を破砕、切削、切
断、擦か、研削或いは造粒することにより硫黄をバイン
ダーとして得られる。但し、原材料の混合順序や硫黄の
加熱段階・加熱時期等については用いる原材料により都
度対応する。As a granular or lumpy solid substance, a substance containing a carbonate of calcium and / or magnesium as a main component and sulfur are mixed so as to be as homogeneous as possible, and a flame retardant material or an iron compound is also possible. Add sulfur as a binder by crushing, cutting, cutting, rubbing, grinding or granulating the solidified material that is rapidly solidified after heating and melting sulfur at a temperature of about 112 to 190 ° C. can get. However, the mixing order of the raw materials, the heating stage and the heating time of sulfur, etc. will depend on the raw materials used.
【００１７】茲で用いるカルシウム及び／またはマグネ
シウムの炭酸塩を主成分とする物質の粒径は概ね５ｍｍ
以下が望ましく、構成粒径の５０％以上が１ｍｍ以下で
あることも同時に満たすものが望ましい。The particle size of the substance containing calcium and / or magnesium carbonate as a main component used in mushrooms is about 5 mm.
The following is desirable, and at the same time, it is desirable that 50% or more of the constituent grain size is 1 mm or less.
【００１８】難燃化材料のうち、水酸化アルミニウムは
粉末、バーミキュライト精石は粒径が３ｍｍ以下、硅酸
質岩石粉末は水に溶出する有害物質を環境基準値以上含
まないものが望ましい。これら難燃化材料は、いずれも
風乾処理程度の乾燥工程を経たものを用いることが望ま
しい。Among the flame-retardant materials, aluminum hydroxide is powder, vermiculite refined stone has a particle size of 3 mm or less, and silicic acid.
It is desirable that the quality rock powder does not contain harmful substances that elute in water above the environmental standard value. It is desirable to use any of these flame-retardant materials that have undergone a drying process such as air-drying.
【００１９】鉄及び／または鉄化合物については、粒度
が２００メッシュ以下のものを用いることが望ましい。It is desirable to use iron and / or iron compounds having a particle size of 200 mesh or less.
【００２０】このようにして得られる硝酸性窒素脱窒基
質は、硝酸性窒素の除去に係る水質浄化に適し、しかも
硝酸性窒素１５０ｍｇ／ｌ程度の高濃度の硝酸性窒素の
除去にも優れた効果を発揮し、処理水には有害物質が含
まれず、且つ、ｐＨは常に中性付近に保たれる。The nitrate nitrogen denitrification substrate thus obtained is suitable for water purification for removing nitrate nitrogen, and is also excellent for removing high concentration nitrate nitrogen of about 150 mg / l nitrate nitrogen. It exerts its effect, the treated water does not contain harmful substances, and the pH is always kept near neutral.
【００２１】万が一、乾燥保管時に直火にさらされて
も、この硝酸性窒素脱窒基質には難燃性が付与されてい
るため、火元が無くなれば自然消火し、燃焼を継続する
恐れは極めて小さい。Even if exposed to an open flame during dry storage, the nitrate nitrogen denitrification substrate is provided with flame retardancy. Therefore, if the fire source disappears, there is no risk of spontaneous extinction and continued combustion. Extremely small.
【００２２】また、脱窒に与かる菌体を定着させた硝酸
性窒素脱窒基質物を用いれば、脱窒は速やかに開始さ
れ、且つ、微生物相が安定する。If a nitrate nitrogen denitrification substrate on which the cells involved in denitrification are settled is used, denitrification is started quickly and the microflora is stabilized.
【００２３】その有効性を確認するべく、本発明品とし
て結晶質石灰岩粉粒体：２４重量部、硫黄粉末：３８重
量部に対し、珪酸質岩石粉末：１６重量部、バーミキュ
ライト精石：１９重量部、水酸化アルミニウム粉末：３
重量部を共存させて固化したものを破砕した試料（本発
明実施例１）、珪酸質岩石粉末：１６重量部、バーミキ
ュライト精石：１４重量部、水酸化アルミニウム粉末：
４重量部、硫化鉄粉末：４重量部を共存させて固化した
ものを破砕した試料（本発明実施例２）を作製した。In order to confirm its effectiveness, as a product of the present invention, crystalline limestone powder: 24 parts by weight, sulfur powder: 38 parts by weight, siliceous rock powder: 16 parts by weight, vermiculite fine stone: 19 parts by weight Parts, aluminum hydroxide powder: 3
A sample obtained by crushing what was solidified by coexisting with parts by weight (Example 1 of the present invention), siliceous rock powder: 16 parts by weight, vermiculite fine stone: 14 parts by weight, aluminum hydroxide powder:
4 parts by weight, iron sulfide powder: 4 parts by weight coexistent and solidified to prepare a sample (Example 2 of the present invention).
【００２４】また、硫黄粉末：２５重量部、アルカリ性
岩石粉粒：７５重量部を共存させて固化したものを破砕
した試料（本発明実施例３）と、本発明実施例１の３０
０ｇを埼玉県深谷市内のネギ圃場を流れる暗渠集水路よ
り採取の底質３０ｇと硝酸アンモニウムを溶解し調製し
た硝酸性窒素１７５ｍｇ／ｌ溶液３０００ｍｌで９０日
間馴養して脱窒菌体を定着させた試料（本発明実施例
４）も作製した。また、苦灰石粉末：５５重量部、硫黄
粉末：４５重量部を共存させて固化したものを破砕した
試料（本発明実施例５）も作製した。A sample obtained by crushing a solidified product of sulfur powder: 25 parts by weight and alkaline rock powder particles: 75 parts by weight (Example 3 of the present invention) and 30 of Example 1 of the present invention.
A sample in which 0 g was acclimated for 90 days with 3000 ml of nitrate nitrogen 175 mg / l solution prepared by dissolving 30 g of sediment collected from an underdrain canal flowing in a green onion field in Fukaya City, Saitama Prefecture, and ammonium nitrate was fixed. Example 4 of the present invention was also produced. Also, a sample (Example 5 of the present invention) was prepared by crushing a solidified mixture of dolomite powder: 55 parts by weight and sulfur powder: 45 parts by weight.
【００２５】なお、本発明はこの実施例の内容に限定さ
れるものではない。The present invention is not limited to the contents of this embodiment.
【００２６】比較例としては、粒径約５ｍｍの硫黄粒：
１０重量部と粒径５〜１０ｍｍ程度の石灰岩粒：１０重
量部とを混合した試料（比較例１）、硫黄粉末：５０重
量部と石灰岩粉末：５０重量部を共存させて固化したも
のを破砕した試料（比較例２）、硫黄粉末：２５重量部
とアルカリ性岩石粉粒：７５重量部を共存させて固化さ
せたが、破断面・切削面・擦か面を有しない試料（比較
例３）、石灰岩粉末：５０重量部と硫黄粉末：５０重量
部に珪藻土粉末：２重量部を共存させて固化したものを
破砕した試料（比較例４）を作製した。これら実施例及
び比較例に係る試料の粒子径は５〜１０ｍｍ程度に調製
した。As a comparative example, sulfur particles having a particle size of about 5 mm:
A sample (comparative example 1) in which 10 parts by weight and 10 parts by weight of limestone particles having a particle size of about 5 to 10 mm were mixed, and a solidified product of 50 parts by weight of sulfur powder and 50 parts by weight of limestone was crushed. Sample (Comparative Example 2), which was solidified by coexistence of 25 parts by weight of sulfur powder and 75 parts by weight of alkaline rock powder particles, but a sample having no fracture surface, cutting surface, or rubbing surface (Comparative Example 3) A sample (Comparative Example 4) was prepared by crushing a solidified mixture of 50 parts by weight of limestone powder and 50 parts by weight of sulfur powder and 2 parts by weight of diatomaceous earth powder. The particle diameters of the samples according to these examples and comparative examples were adjusted to about 5 to 10 mm.
【００２７】本発明実施例４を除く各試料につき、硝酸
性窒素１７５ｍｇ／ｌに調製した水温１５〜２０℃の溶
液に埼玉県深谷市内のネギ圃場より採取の畑土（黒ボク
土）１ｗｔ％を添加したものを原水として、試料：水＝
１：１０（ｗｔ）にて脱窒バッチ試験を行った。その結
果は、図１の硝酸性窒素減少推移、残存量ｍｇ／ｌで示
す通りであり、本発明実施例の試料はいずれも高濃度の
硝酸性窒素の除去に優れることが確認できた。For each sample other than Example 4 of the present invention, 1 wt of upland soil (black soil) collected from a leek field in Fukaya City, Saitama Prefecture, in a solution having a nitrate temperature of 175 mg / l and a water temperature of 15 to 20 ° C. % As the raw water, sample: water =
A denitrification batch test was conducted at 1:10 (wt). The results are as shown in FIG. 1 showing the transition of nitrate nitrogen reduction and the residual amount mg / l, and it was confirmed that all the samples of the examples of the present invention were excellent in removing high-concentration nitrate nitrogen.
【００２８】また、上述した脱窒バッチ試験の試験液中
の鉄及びマグネシウム、カルシウム濃度を分析した。そ
の結果は、表１に示す通りであった。表１中、鉄につい
ては１ｍｇＬ−１以上を表示し、マグネシウムについて
は１０ｍｇＬ−１以上を表示し、カルシウムについては
１０ｍｇＬ−１以上を表示した。Further, the concentrations of iron, magnesium and calcium in the test solution of the above-mentioned denitrification batch test were analyzed. The results are as shown in Table 1. In Table 1, the iron displays the above 1 mg l -1, for magnesium displays the above 10MgL -1, for calcium displayed over 10mgL -1.
【００２９】[0029]
【表１】 [Table 1]
【００３０】この表１で明らかな通り、本発明実施例２
の鉄濃度は他の試料を用いたものより明らかに高く、有
機物混入時の硫化水素発生抑制への適用に優れるもので
あることが確認できた。マグネシウムについては、本発
明実施例５の濃度が明らかに高かった。As is clear from Table 1, Example 2 of the present invention
It was confirmed that the iron concentration of was clearly higher than that of the samples using other samples, and that it was excellent in application to the suppression of hydrogen sulfide generation when organic substances were mixed. Regarding magnesium, the concentration of Example 5 of the present invention was obviously high.
【００３１】本発明実施例４を１０ｗｔ％共存させた比
較例２の試料と、比較例２の試料に埼玉県深谷市内のネ
ギ圃場を流れる暗渠集水路より採取の底質を１ｗｔ％添
加したものについて、硝酸性窒素８０ｍｇ／ｌの原水を
対象に試料：水＝１：３（ｗｔ）のバッチ試験による脱
窒処理を行ったところ、表２に示す結果となった。To the sample of Comparative Example 2 in which 10 wt% of Example 4 of the present invention was made to coexist, and to the sample of Comparative Example 2 was added 1 wt% of the sediment collected from the underdrain canal flowing through the green onion field in Fukaya City, Saitama Prefecture. When the denitrification treatment was carried out by a batch test of sample: water = 1: 3 (wt) for the raw water containing 80 mg / l of nitrate nitrogen, the results shown in Table 2 were obtained.
【００３２】表２中、は本発明実施例４（定着サンプ
ルを２５℃で３時間乾燥したもの）：１０重量部＋比較
例２：９０重量部のものを示し、は本発明実施例４
（定着サンプル２５℃，３時間の乾燥品を室温で３０日
間保管したもの）：１０重量部＋比較例２：９０重量部
のものを示し、は比較例２：９９重量部＋底質：１重
量部のものを示す。In Table 2, is shown Example 4 of the present invention (fixed sample dried at 25 ° C. for 3 hours): 10 parts by weight + Comparative Example 2: 90 parts by weight, and Example 4 of the present invention
(Fixed sample dried at 25 ° C. for 3 hours and stored at room temperature for 30 days): 10 parts by weight + Comparative Example 2: 90 parts by weight, where is Comparative Example 2:99 parts by weight + sediment: 1 Parts by weight are shown.
【００３３】[0033]
【表２】 [Table 2]
【００３４】この表２から明らかなように、脱窒能につ
いては大差ないが、処理水の清澄度に差が生じ、地下水
の浄化等の処理対象によっては、脱窒に与かる細菌や微
生物を定着させたものを用いることが望ましいことが確
認できた。また、脱窒に優れる菌体を含んだ土壌や底質
の入手及び菌体の入手が現地で困難な場合にも、該基質
物を用い、脱窒に有効な菌体を培養・定着させることは
極めて有効であることが確認できた。As is clear from Table 2, there is no great difference in denitrification ability, but there is a difference in the clarification degree of the treated water, and depending on the object of treatment such as groundwater purification, bacteria and microorganisms involved in denitrification It was confirmed that it is desirable to use the fixed one. In addition, even if it is difficult to obtain soil or sediment containing microbial cells excellent in denitrification and microbial cells at the site, the substrate material should be used to culture and establish microbial cells effective for denitrification. Was confirmed to be extremely effective.
【００３５】本発明実施例１，２と比較例２，４の試料
について、着火試験を行った結果を表３に示す。この試
験は、断面正方形１ｃｍ２で容積３ｃｍ３の直方体供試
体にて実施した。着火は、長口ライター直火にて直方体
供試体に外炎（高温部）を当て１０秒間継続した。実施
例または比較例の各々１項につき、１０個の供試体（試
料）を用意し、項目毎の全供試体の自然消火に要した時
間（以内）を該当した消火時間に個数表示した。試験に
影響しないように新鮮な空気の供給、亜硫酸ガスの排気
を行った。Table 3 shows the results of an ignition test conducted on the samples of Examples 1 and 2 of the present invention and Comparative Examples 2 and 4. This test was carried out on a rectangular parallelepiped test piece having a square cross section of 1 cm 2 and a volume of 3 cm 3 . Ignition was continued for 10 seconds by applying an external flame (high temperature part) to the rectangular parallelepiped test piece by direct flame open flame. Ten specimens (samples) were prepared for each item of the examples or comparative examples, and the time (within) required for spontaneous extinguishing of all specimens for each item was displayed in number at the corresponding fire extinguishing time. Fresh air was supplied and sulfur dioxide was exhausted so as not to affect the test.
【００３６】[0036]
【表３】 [Table 3]
【００３７】この表３から明らかなように、本発明実施
例１，２の試料は明らかに難燃性を示し、自然消火した
が、比較例２及び４の試料は全体が完全燃焼するまで消
火されなかった。As is clear from Table 3, the samples of Examples 1 and 2 of the present invention clearly showed flame retardancy and spontaneously extinguished, but the samples of Comparative Examples 2 and 4 extinguished until the whole was completely burned. Was not done.
【００３８】[0038]
【発明の効果】以上述べた如く、本発明の請求項１に係
る硝酸性窒素脱窒基質に依れば、カルシウム及び／また
はマグネシウムの炭酸塩を主成分とする物質と硫黄とに
加え、水酸化アルミニウム，バーミキュライト精石，硅
酸質岩石粉末のいずれかの難燃化材料が単一の体内に共
存し、硫黄をバインダーとする粒状または塊状の固形物
でなるため、施肥削減の困難な農地の暗渠排水や圃場浸
透水、養液栽培における排液のような高硝酸性排水はも
とより、農業集落排水の一次処理水や合併浄化槽等によ
り無機化された排水中の硝酸性窒素の除去にも優れる。
また、各組成物が単一の体内に共存することから、脱窒
菌体が脱窒に必要な物質を容易に摂取でき高い脱窒効果
を発揮するだけでなく、万が一の乾燥着火時にも継続的
燃焼をすることがないため、あらゆる局面で安全に使用
ができる。As described above, according to the nitrate nitrogen denitrifying substrate according to claim 1 of the present invention, in addition to the substance containing calcium and / or magnesium carbonate as the main component and sulfur, water is added. Aluminum oxide , vermiculite fine stone, silica
Flame retardant material of any of the acid rock powder coexist in a single body, because it is a granular or lumpy solid matter with sulfur as a binder, it is difficult to reduce fertilizer application in the underdrain drainage and farmland infiltration water of farmland, It excels not only in high-nitrate wastewater such as drainage in hydroponics, but also in removing nitrate nitrogen in wastewater that has been mineralized by primary treatment water of agricultural settlement wastewater and combined septic tanks.
In addition, since each composition coexists in a single body, the denitrifying bacteria can easily ingest the substances necessary for denitrification and exert a high denitrifying effect, and also continue to be maintained even in the event of dry ignition. Since it does not burn, it can be used safely in all situations.
【００３９】本発明の請求項２に係る硝酸性窒素脱窒基
質に依れば、カルシウム及び／またはマグネシウムの炭
酸塩を主成分とする物質と硫黄とに加え、水酸化アルミ
ニウム，バーミキュライト精石，硅酸質岩石粉末のいず
れかの難燃化材料と、鉄及び／または鉄化合物とが単一
の体内に共存し、硫黄をバインダーとする粒状または塊
状の固形物でなるため、施肥削減の困難な農地の暗渠排
水や圃場浸透水、養液栽培における排液のような高硝酸
性排水はもとより、農業集落排水の一次処理水や合併浄
化槽等により無機化された排水中の硝酸性窒素の除去に
も優れ、鉄分の供給により有機物混入時の硫化水素ガス
の発生を抑制でき、脱窒菌体が脱窒に必要な物質を容易
に摂取できて高い脱窒効果を発揮し、また、万が一の乾
燥着火時にも継続的燃焼をすることがないため、あらゆ
る局面で安全に使用できる。According to the nitrate nitrogen denitrifying substrate according to claim 2 of the present invention, in addition to the substance containing calcium and / or magnesium carbonate as a main component and sulfur, aluminum hydroxide is added.
Chloride, vermiculite fine stone, and any flame retardant material silicate rocks powder, and the iron and / or iron compound to coexist in a single body, consisting of a solid grains or clusters of sulfur as a binder For this reason, not only high drainage water such as underdrain from farmland where it is difficult to reduce fertilizer application, high-nitrate drainage such as field permeation water and drainage from hydroponics, but also primary treated water from agricultural settlement drainage and wastewater mineralized by combined septic tanks etc. It is also excellent in removing nitrate nitrogen in the product, and by supplying iron, it is possible to suppress the generation of hydrogen sulfide gas when organic substances are mixed, and the denitrifying bacteria can easily ingest the substances necessary for denitrification, and exert a high denitrifying effect. Also, since it does not burn continuously even in the unlikely event of dry ignition, it can be used safely in all situations.
【００４０】本発明の請求項３に係る硝酸性窒素性脱窒
基質物に依れば、請求項１または２の硝酸性窒素脱窒基
質に、硫黄酸化細菌のような脱窒に与かる細菌や微生物
を定着し、それら菌体の増殖及び被処理水からの脱窒の
容易な粒状または塊状の固形物でなるため、脱窒菌体の
自然定着が期待できない現場等における一種の種菌とし
て使用でき、硝酸性窒素脱窒基質全体の汎用性を高める
ことができる。According to the nitrate nitrogen denitrifying substrate according to claim 3 of the present invention, the nitrate nitrogen denitrifying substrate according to claim 1 or 2 is a bacterium which is involved in denitrification such as sulfur-oxidizing bacteria. It can be used as a kind of inoculum in fields where natural colonization of denitrifying cells is not expected, because it is a granular or lumpy solid material that can easily colonize microorganisms and proliferate and denitrify the cells from treated water. , The versatility of the whole nitrate nitrogen denitrification substrate can be increased.
【図１】図１は、本発明に係る硝酸性窒素脱窒基質によ
る硝酸性窒素除去量の経時的推移、即ち、供試液中に含
まれる硝酸性窒素の減少推移を比較例１，２，３，４と
共に示すグラフである。FIG. 1 is a graph showing changes over time in the amount of nitrate nitrogen removed by a nitrate nitrogen denitrifying substrate according to the present invention, that is, changes in the amount of nitrate nitrogen contained in a test solution. It is a graph shown with 3 and 4.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) C02F 3/00 - 3/34 ─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. 7 , DB name) C02F 3/00-3/34
Claims (3)
炭酸塩を主成分とする物質と硫黄とに加え、水酸化アル
ミニウム，バーミキュライト精石，硅酸質岩石粉末のい
ずれかの難燃化材料が単一の体内に共存し、硫黄をバイ
ンダーとする粒状または塊状の固形物でなることを特徴
とする硝酸性窒素脱窒基質。[Claim 1] In addition to the substances and sulfur mainly composed of calcium and / or carbonates of magnesium, hydroxide Al
Minium , vermiculite refined stone, and siliceous rock powder flame-retardant materials coexist in a single body and sulfur
Nitrate nitrogen denitrification substrate, which is characterized by comprising a granular or lumpy solid substance as a binder.
炭酸塩を主成分とする物質と硫黄とに加え、水酸化アル
ミニウム，バーミキュライト精石，硅酸質岩石粉末のい
ずれかの難燃化材料と、鉄及び／または鉄化合物とが単
一の体内に共存し、硫黄をバインダーとする粒状または
塊状の固形物でなることを特徴とする硝酸性窒素脱窒基
質。2. In addition to the substances and sulfur mainly composed of calcium and / or carbonates of magnesium, hydroxide Al
Mineral , vermiculite fine stone, and silicate rock powder flame-retardant material and iron and / or iron compound coexist in a single body, and it is a granular or lumpy solid substance with sulfur as a binder A nitrate nitrogen denitrifying substrate characterized by the following.
窒基質に、硫黄酸化細菌のような脱窒に与かる細菌や微
生物を定着し、それら菌体の増殖及び被処理水からの脱
窒の容易な粒状または塊状の固形物でなることを特徴と
する硝酸性窒素脱窒基質物。3. The nitrate nitrogen denitrification substrate according to claim 1 or 2, wherein bacteria or microorganisms involved in denitrification, such as sulfur-oxidizing bacteria, are fixed, and the growth of these cells and the treatment of water to be treated are carried out. A nitrate nitrogen denitrification substrate characterized by comprising a granular or lumpy solid substance that is easily denitrified.
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| JP4562935B2 (en) * | 2001-03-22 | 2010-10-13 | 新日鐵化学株式会社 | Apparatus and method for treating nitrate nitrogen in sea water |
| JP2002346592A (en) * | 2001-05-28 | 2002-12-03 | Nippon Steel Chem Co Ltd | Low temperature denitrification material and denitrification method using the same |
| WO2004031084A1 (en) * | 2002-09-30 | 2004-04-15 | Nippon Steel Chemical Co., Ltd. | Method of removing nitrate nitrogen and device used for the method |
| JP4545408B2 (en) * | 2002-11-05 | 2010-09-15 | 新日鐵化学株式会社 | Water treatment material, nitrate nitrogen treatment material and production method thereof |
| KR100990730B1 (en) | 2002-11-05 | 2010-10-29 | 신닛테츠가가쿠 가부시키가이샤 | Material for treating nitrate nitrogen and producing method thereof, method and apparatus for eliminating nitrate nitrogen from water, and material for denitration |
| JP2004344765A (en) * | 2003-05-22 | 2004-12-09 | Ohbayashi Corp | Water purifying material and its manufacturing method |
| JP4608851B2 (en) * | 2003-06-10 | 2011-01-12 | 株式会社大林組 | Construction method of water purification structure |
| JP4602025B2 (en) * | 2004-06-01 | 2010-12-22 | 新日鐵化学株式会社 | Nitrate nitrogen treatment material and waste water treatment method |
| JP4609582B2 (en) * | 2009-01-29 | 2011-01-12 | 株式会社大林組 | Groundwater purification system |
| JP6742069B2 (en) * | 2014-12-19 | 2020-08-19 | 日鉄環境株式会社 | Biological treatment method of water containing organic matter |
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