JPH0653272B2 - Wastewater purification material - Google Patents
Wastewater purification materialInfo
- Publication number
- JPH0653272B2 JPH0653272B2 JP63241996A JP24199688A JPH0653272B2 JP H0653272 B2 JPH0653272 B2 JP H0653272B2 JP 63241996 A JP63241996 A JP 63241996A JP 24199688 A JP24199688 A JP 24199688A JP H0653272 B2 JPH0653272 B2 JP H0653272B2
- Authority
- JP
- Japan
- Prior art keywords
- wastewater
- facultative anaerobic
- char
- purification material
- anaerobic microorganisms
- 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 - Lifetime
Links
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)
- Water Treatment By Sorption (AREA)
Description
本発明は生活雑廃水、畜産廃水、各種工場廃水等を浄化
するための廃水浄化材に係わり、特に詳しくは動植物性
油脂や鉱物油等の油分を含有している廃水の浄化材に関
する。The present invention relates to a wastewater purification material for purifying household wastewater, livestock wastewater, various factory wastewater, and the like, and more particularly to a wastewater purification material containing an oil component such as animal and vegetable oils and mineral oils.
従来、生活雑廃水、畜産廃水、各種工場廃水等を浄化す
る方法としては薬品中和法、曝気法、吸着法等が広く知
られている。 薬品中和法は日々薬品を使用することからランニングコ
ストが高くつくほか、汚泥の量が増加するので廃棄処理
費用が嵩むと云う問題点がある。 曝気処理法は、廃水中に強制的に多量の空気を供給する
ことにより、廃水中に浮遊または溶解した汚濁物質をガ
ス化させたり、微生物による分解を促進したり、それに
よって生じた汚泥を除去するものであるが、反応が遅い
ために曝気処理のスペースを広く取る必要がある他、油
脂分を含んだ廃水に対しては、曝気すると廃水が泡立
ち、充分な撹拌が行われず生物化学的酸素要求量（ＢＯ
Ｄ）、化学的酸素要求量（ＣＯＤ）共に低下させること
が困難であると云う問題点がある。 活性炭によって廃水中の汚濁物質を吸着除去する方法
は、活性炭の微小な孔が高い吸着能を持っているため、
有効な方法のひとつであるが、微小孔が吸着された汚濁
物質で目詰まり状態になると、吸着しなくなるため全量
交換しなければならない。周知のように活性炭は可なり
高価であるため、度々交換することはコスト的にも採算
が合わないだけでなく、交換時には廃水が処理出来ない
と云う問題点もある。 高価な活性炭と同一の効果を安いコストで得ることが出
来る技術が、特公昭５５−２２４０９号公報に提案され
ている。すなわち、低品位石炭を原料とし、これを酸洗
いすることにより多孔質化すれば、活性炭と同様にその
微小孔に廃水中の汚濁物質が吸着されるので、廃水が浄
化されることが開示されている。特に、多孔質化した活
性化石炭を１６０〜２００メッシュの微粉末とすること
により、水面にしばらくは浮遊させることが出来るの
で、水面に浮遊した原油を除去することの出来る有効な
技術であると報告されている。Conventionally, chemical neutralization method, aeration method, adsorption method and the like are widely known as methods for purifying household wastewater, livestock wastewater, various factory wastewater and the like. The chemical neutralization method has a problem in that running costs are high because chemicals are used every day, and waste disposal costs are high because the amount of sludge increases. The aeration method is to supply a large amount of air forcibly into wastewater to gasify pollutants suspended or dissolved in wastewater, accelerate decomposition by microorganisms, and remove sludge generated by it. However, since the reaction is slow, it is necessary to take a large space for aeration treatment.For wastewater containing oil and fat, when aeration is performed, the wastewater foams, and sufficient agitation is not performed, resulting in biochemical oxygen. Required amount (BO
There is a problem that it is difficult to reduce both D) and the chemical oxygen demand (COD). The method of adsorbing and removing pollutants in wastewater with activated carbon is because the fine pores of activated carbon have a high adsorption capacity.
This is one of the effective methods, but if the micropores become clogged with the adsorbed pollutant, they will not be adsorbed and all must be replaced. As is well known, since activated carbon is quite expensive, it is not profitable to replace it frequently, and there is also a problem that waste water cannot be treated during replacement. A technique capable of obtaining the same effect as expensive activated carbon at a low cost is proposed in Japanese Patent Publication No. 55-22409. That is, if low-grade coal is used as a raw material and it is made porous by pickling it, contaminants in the wastewater are adsorbed in the micropores like activated carbon, so that the wastewater is disclosed to be purified. ing. In particular, by using porous activated coal as fine powder of 160 to 200 mesh, it can be floated on the water surface for a while, and it is an effective technique that can remove crude oil floating on the water surface. It has been reported.
上記したように、活性炭および特公昭５５−２２４０９
号公報に提案されている活性化石炭は、廃水中に設置し
た当初はその微小孔に良く汚濁物質を吸着し、廃水を浄
化する効果が大きい。しかし、無数にある微小孔も時間
の経過と共に廃水中の汚濁物質を吸着堆積すると、遂い
は全く浄化作用を失うと云う欠点がある。 特に、従来の廃水浄化材においては、廃水に油脂分が含
まれていると、目詰まりを起こし易く、交換頻度が多く
なりコスト高を招くと云った欠点があった。 このため、本発明は廃水の油脂分を分離し、これを微生
物によって順次消化分解し、設置した当初の優れた浄化
作用を長期間に渡って維持することの出来る廃水浄化材
を提供するものである。As described above, activated carbon and Japanese Patent Publication No. 55-22409.
The activated coal proposed in Japanese Patent Publication has a large effect of adsorbing pollutants into the micropores of the activated water when it is initially installed in the wastewater and purifying the wastewater. However, the innumerable micropores also have a drawback in that when the contaminants in the wastewater are adsorbed and deposited with the passage of time, the purification action is finally lost. In particular, the conventional wastewater purification materials have a drawback that if the wastewater contains fats and oils, clogging is likely to occur, the frequency of replacement is high, and the cost is high. Therefore, the present invention provides a wastewater purification material capable of separating the oil and fat content of the wastewater, sequentially digesting and decomposing it by microorganisms, and maintaining the original excellent cleaning action for a long period of time. is there.
本発明は上記した従来技術の課題を解決するためになさ
れたもので、通性嫌気性微生物の移乗したハイブリケッ
トチャーが、油脂分吸着性に優れた吸着材に分散して配
設されたことを特徴とする廃水浄化材であり、通性嫌気
性微生物が、油脂分を消化分解することの可能な微生物
であることを特徴とする廃水浄化材である。The present invention has been made in order to solve the above-mentioned problems of the prior art, in which a hybridet char on which facultative anaerobic microorganisms have been transferred is disposed in an adsorbent having an excellent oil and fat adsorbing property. And a facultative anaerobic microorganism, which is a microorganism capable of digesting and decomposing fats and oils.
廃水浄化材の構成要件である多孔質のハイブリケットチ
ャーは、亜炭、褐炭等の低品位石炭を硫酸等の酸に適当
な時間、例えば２４時間浸漬することによって灰分を侵
食・除去し、表面ならびに内部に無数の微小孔を形成す
ることによって作ることが出来る。ハイブリケットチャ
ーの内部比表面積は略５００〜１０００ｍ２／ｇの範囲
が好ましい。内部比表面積が５００ｍ２／ｇ以下の場合
は移乗可能な通性嫌気性微生物の数が不足するので、廃
水の浄化機能が充分でなくなる。一方、内部比表面積が
１０００ｍ２／ｇ以上のハイブリケットチャーは強度が
不足して脆くなるので、積み重ねて長期保管するときな
どに崩れ易くなる。このため、ハイブリケットチャーの
内部比表面積としては５００〜１０００ｍ２／ｇの範囲
が好ましい。 ハイブリケットチャーの木質部は通性嫌気性微生物の栄
養分である。したがって、通性嫌気性微生物が移乗して
廃水中に設置されるまでの期間と、設置された後も微生
物の餌となる廃水が長期に渡って供給されない時に備
え、少なくとも数ケ月間は棲息出来るように０．１％以
上の木質部は必要である。一方、木質部が１０％を越え
るとハイブリケットチャーの強度が低下し、積み重ねて
長期保管するときなどに崩れ易くなる。このような理由
からハイブリケットチャーの木質部は０．１％〜１０％
の範囲が好ましい。 ハイブリケットチャーに移乗させる通性嫌気性微生物と
しては、動植物性油脂や鉱物油などの油脂分を消化分解
することの可能な微生物（例えば第２図に示す微生物Ｔ
ＢＣ−０００１−昭和６３年９月２７日微工研証明願い
済み）が用いられる。 通常、かかる通性嫌気性微生物は、最初に１０個弱／ｇ
程度移乗させておけば、ハイブリケットチャーの木質部
を食べてその後自然と増殖し、２０個／ｇ程度まで増加
していく。 通性嫌気性微生物が移乗したハイブリケットチャーを配
設する吸着材は、動植物性油脂や鉱物油などを効率良く
吸着する性質を備えておれば、素材に限定はないが、通
常は軽量化を図るために見掛密度が小さく、且つ、廉価
な綿布・フェルト・不織布等が適宜使用される。 そして、前記吸着材に通性嫌気性微生物を移乗させたハ
イブリケットチャーが、通常、約０．３〜０．４ｇ／ケ
程度の大きさに加工されて、１０cm角の大きさの吸着材
の中に、１０ケ程度の割合で分散して配設される。The porous hybrid hybrid char, which is a constituent feature of the wastewater purification material, erodes and removes ash by immersing low-grade coal such as lignite and brown coal in an acid such as sulfuric acid for an appropriate period of time, for example, 24 hours, and removes ash from the surface and It can be made by forming innumerable micropores inside. The internal specific surface area of the hybridette char is preferably in the range of approximately 500 to 1000 m 2 / g. If the internal specific surface area is 500 m 2 / g or less, the number of facultative anaerobic microorganisms that can be transferred will be insufficient, and the purification function of wastewater will not be sufficient. On the other hand, the hybrid charcoal having an internal specific surface area of 1000 m 2 / g or more has insufficient strength and becomes brittle, so that it tends to collapse when stacked and stored for a long period of time. Therefore, the internal specific surface area of the hybridette char is preferably in the range of 500 to 1000 m 2 / g. The woody part of hybrid hybrid is a nutrient of facultative anaerobic microorganisms. Therefore, it is possible to live for at least several months in preparation for the period until the facultative anaerobic microorganisms are transferred and installed in the wastewater, and for the time when the wastewater that is the food for the microorganisms is not supplied for a long time after the installation. As such, wood parts of 0.1% or more are necessary. On the other hand, when the wood content exceeds 10%, the strength of the hybridette char is reduced, and it tends to collapse when stacked and stored for a long period of time. For this reason, the wood part of hybrid kit char is 0.1% to 10%.
Is preferred. The facultative anaerobic microorganisms to be transferred to the hybrid charcoal are microorganisms capable of digesting and decomposing fats and oils such as animal and vegetable fats and oils (for example, the microorganism T shown in FIG. 2).
BC-0001-September 27, 1988, Micromachine Lab certification has been requested) is used. Usually, such facultative anaerobic microorganisms are initially less than 10 / g
If they are transferred, they will eat the woody parts of the hybridette char, then naturally grow and increase to about 20 pieces / g. The adsorbent for arranging a hybridet char on which facultative anaerobic microorganisms are transferred is not limited in material as long as it has a property of efficiently adsorbing animal and vegetable oils and mineral oils, etc. For this purpose, inexpensive cotton cloth, felt, non-woven cloth, etc., which have a low apparent density, are appropriately used. Then, the hybridet char having the adsorbent on which facultative anaerobic microorganisms are transferred is usually processed into a size of about 0.3 to 0.4 g / piece to obtain a 10 cm square adsorbent. Inside, they are dispersed and arranged at a rate of about 10.
廃水中の油脂分の汚濁物質は、綿布等の油脂分吸着性に
優れた吸着材によって主に吸着され、ハイブリケットチ
ャーに移乗している通性嫌気性微生物により次々と消化
分解されるので、処理廃水の量に合わせて廃水浄化材を
設置すれば、汚濁物質によって目詰まりすることなく、
半永久的に浄化処理することが出来る。 そして、０．１〜１０％の木質部を有するハイブリケッ
トチャーは活性炭等に比較すると、廃水中に設置された
ときに温度が高くなるので通性嫌気性微生物の棲息に好
適であり、特別の寒冷地を除いては保温装置を必要とし
ないし、木質部は通性嫌気性微生物の栄養素でもあるの
で、廃水浄化材を廃水中に設置するまでの期間や、餌と
なる廃水が年末年始等で長期間供給されなくなった時に
も特別の対策を講じる必要がない。 また、ハイブリケットチャーを分散して配設する吸着材
は、通常、綿布・フェルト・不織布等のような見掛密度
の小さい素材であるので、軽量化が図れ、取扱が容易に
なるばかりか、これを収納する浄化槽の強度をそれ程大
きく取る必要がない。Contaminants of oil and fat in the wastewater are mainly adsorbed by an adsorbent having excellent oil and fat adsorbability such as cotton cloth, and are successively digested and decomposed by facultative anaerobic microorganisms transferred to the hybridet char, If you install the wastewater purification material according to the amount of treated wastewater, it will not be clogged with pollutants,
It can be purified semi-permanently. And, compared to activated carbon and the like, a hybridet char having a woody portion of 0.1 to 10% has a higher temperature when installed in wastewater, and is suitable for facultative anaerobic microorganisms to live in, and it is suitable for special cold weather. Except for the ground, there is no need for a heat-retaining device, and since the wood part is also a nutrient for facultative anaerobic microorganisms, the period until the wastewater purification material is installed in the wastewater and the wastewater used as bait are long There is no need to take any special measures when the supply is stopped for a certain period. In addition, since the adsorbent material in which the hybrid-charts are dispersedly arranged is usually a material having a small apparent density such as cotton cloth, felt, and non-woven fabric, it is possible to reduce the weight and facilitate the handling. It is not necessary to increase the strength of the septic tank that stores this.
つぎに本発明を一実施例に基づいて詳細に説明する。 図１において、１１は１％の木質部を有し、内部比表面
積が約８００ｍ２／ｇに調整された亜炭を原料とするハ
イブリケットチャーであって、約０．３〜０．４ｇ／ケ
の大きさに形成され、前記通性嫌気性微生物（図示せ
ず）が約１０個／ｇ移乗しており、７×２０×３０cmの
大きさで、動植物性油脂や鉱物油などの油脂分の吸着性
に優れた見掛密度の小さい例えば綿布１２の中に、４０
ケ程度が分散して配設され、本発明になる軽量の廃水浄
化材１を形成している。 前記構成の廃水浄化材１は、軽量であるため浄化槽２の
中にステンレス製のケース２１によって容易に保持する
ことが可能であり、例えば３段に重ねて設置される。 このため、廃水が浄化槽２の底部側の注入口２２から流
入し、上部の排出口２３から排出されるとき、中央部に
設置した吸着材の綿布１２によって廃水中の油脂分が効
率良く吸着除去されるので、排出口２３から排出される
廃水は奇麗に浄化されている。 表１は廃水の原水と浄化されて放流される時の油脂分を
比較した一例である。同表から明らかなように、本発明
の廃水浄化材１によって、廃水中の油脂分の殆どが除去
されていることが分かる。 しかも、油脂分が多いにも拘らず、廃水浄化材１は、１
年間と云う長期間に渡る廃水処理を行っても全くその浄
化機能は低下していない。 これは、綿布１２に吸着された油脂分がハイブリケット
チャー１１に移乗している通性嫌気性微生物によって次
々と消化分解されるため、吸着材である綿布１２が目詰
まりしないためである。Next, the present invention will be described in detail based on an embodiment. In FIG. 1, 11 is a hybridite char made from lignite which has a wood part of 1% and whose internal specific surface area is adjusted to about 800 m 2 / g. It is formed into a size, and the facultative anaerobic microorganisms (not shown) are transferred by about 10 cells / g, and the size is 7 × 20 × 30 cm, and the adsorption of fats and oils such as animal and vegetable fats and mineral oils. 40 in cotton cloth 12 with excellent appearance and small apparent density
Dispersed to a certain extent, the lightweight waste water purification material 1 according to the present invention is formed. The wastewater purifying material 1 having the above-described configuration is lightweight, so that it can be easily held in the septic tank 2 by the stainless case 21. For example, the wastewater purifying material 1 is installed in three layers. Therefore, when the wastewater flows in from the inlet 22 on the bottom side of the septic tank 2 and is discharged from the outlet 23 in the upper part, the cotton cloth 12 of the adsorbent installed in the center efficiently adsorbs and removes the oil and fat in the wastewater. Therefore, the wastewater discharged from the discharge port 23 is cleanly purified. Table 1 is an example in which the raw water of the waste water and the fats and oils when purified and discharged are compared. As is clear from the table, it is understood that most of the oil and fat components in the wastewater are removed by the wastewater purification material 1 of the present invention. Moreover, the wastewater purifying material 1 is 1
Even if the wastewater treatment is carried out for a long period of year, the purification function is not deteriorated at all. This is because the fats and oils adsorbed on the cotton cloth 12 are successively digested and decomposed by the facultative anaerobic microorganisms transferred to the hybridette char 11, so that the cotton cloth 12 as the adsorbent is not clogged.
以上説明したように本発明になる廃水浄化材によれば、
従来除去することが困難であった廃水中の油脂分が、綿
布・フェルト・不織布等のような油脂分吸着性に優れた
素材からなる吸着材によって吸着・分離され、これがハ
イブリケットチャーに移乗している通性嫌気性微生物に
より次々に消化分解されて、無害な窒素、炭酸ガス等の
気体として大気中に放出されるので、廃水浄化材が目詰
まりして時間の経過と共に浄化機能が低下すると云った
ことがない。 このため、長期間に渡る廃水の連続処理が可能となっ
た。また、汚濁物質を上記したように無害な気体として
大気中に放出するので、汚泥として処理すべき量が極め
て少なくなり、これに要する処理費用が大幅に削減でき
る。 また、ハイブリケットチャーを、廉価で見掛密度の小さ
い綿布・フェルト・不織布等のような吸着材に分散して
配置しているので、大幅な軽量化とコストの削減が可能
であり、本発明の浄化材を収納する浄化槽を製造・設置
する上でのメリットが大きい。 さらに、通性嫌気性微生物の栄養分である木質部を保有
しているので、年末年始のように処理装置の使用を長期
間停止することがあっても、微生物は前記木質部を食べ
て難なく棲息することが出来るので、通性嫌気性微生物
の栄養分を供給する必要が全くないし、廃水中に設置し
たときにも活性炭より温度が高くなるので、冬季におい
ても特別な寒冷地を除いて、微生物が活動するに充分な
温度が維持され、特に保温する必要がないと云った利点
もある。 したがって、本発明の廃水浄化材は動植物性の油脂分を
含む生活雑廃水はもちろん、食品加工工場、酒造工場、
めっき工場、石油精製工場、車両整備工場、ガソリンス
タンド、機械加工工場等から出る殆ど全ての廃水の浄化
に顕著な効果を奏するものである。According to the wastewater purification material of the present invention as described above,
The fats and oils in the wastewater, which were difficult to remove in the past, are adsorbed and separated by the adsorbent, which is made of a material with excellent fat and oil adsorbability, such as cotton cloth, felt, and non-woven fabric, and this is transferred to the hybridet char. It is digested and decomposed one after another by the facultative anaerobic microorganisms that are released into the atmosphere as harmless nitrogen, carbon dioxide gas, etc., so if the wastewater purification material becomes clogged and the purification function deteriorates over time. I have never said it. Therefore, it became possible to continuously treat wastewater over a long period of time. Further, since the pollutant is released into the atmosphere as a harmless gas as described above, the amount to be treated as sludge is extremely small, and the treatment cost required for this can be greatly reduced. In addition, since the hybridette chars are arranged dispersedly on an adsorbent such as a cotton cloth, felt, or non-woven cloth which is inexpensive and has a low apparent density, it is possible to significantly reduce the weight and reduce the cost. It has great merit in manufacturing and installing the septic tank that stores the purifying material. Furthermore, since it has a woody part that is a nutrient of facultative anaerobic microorganisms, even if the use of the processing device may be stopped for a long period of time such as the year-end and New Year holidays, the microorganisms can eat the woody part and live without difficulty. Since there is no need to supply nutrients of facultative anaerobic microorganisms, the temperature becomes higher than activated carbon even when installed in wastewater, so microorganisms are active even in winter except in special cold regions. There is also an advantage that a sufficient temperature is maintained and there is no need to particularly keep the temperature. Therefore, the wastewater purification material of the present invention is not only a household wastewater containing animal and plant oils and fats, but also a food processing factory, a brewing factory,
It has a remarkable effect on the purification of almost all wastewater from plating plants, oil refineries, vehicle maintenance plants, gas stations, machining plants, etc.
第１図は本発明になる廃水浄化材の説明図、第２図は通
性嫌気性微生物の形態を示す顕微鏡写真（３００倍）、
第３図と第４図は第２図（微生物の形態を示す写真）の
要部の拡大写真（１０００倍）である。 １……廃水浄化材、 １１……ハイブリケットチャー、 １２……綿布、 ２……浄化槽、 ２１……ケース、 ２２……注入口、 ２３……排出口。FIG. 1 is an explanatory view of a wastewater purification material according to the present invention, and FIG. 2 is a micrograph showing the morphology of facultative anaerobic microorganisms (300 times),
3 and 4 are enlarged photographs (× 1000) of the main part of FIG. 2 (photograph showing the morphology of microorganisms). 1 ... Waste water purification material, 11 ... Hybridet char, 12 ... Cotton cloth, 2 ... Septic tank, 21 ... Case, 22 ... Inlet, 23 ... Outlet.
Claims (2)
トチャーが、油脂分吸着性に優れた吸着材に分散して配
設されたことを特徴とする廃水浄化材。1. A wastewater purifying material comprising hybrid adsorbents on which facultative anaerobic microorganisms have been transferred, dispersed in an adsorbent having an excellent oil and fat adsorbing property.
ることの可能な微生物であることを特徴とする特許請求
の範囲第１項記載の廃水浄化材。2. The wastewater purifying material according to claim 1, wherein the facultative anaerobic microorganism is a microorganism capable of digesting and decomposing oil and fat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63241996A JPH0653272B2 (en) | 1988-09-27 | 1988-09-27 | Wastewater purification material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63241996A JPH0653272B2 (en) | 1988-09-27 | 1988-09-27 | Wastewater purification material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0290998A JPH0290998A (en) | 1990-03-30 |
| JPH0653272B2 true JPH0653272B2 (en) | 1994-07-20 |
Family
ID=17082700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63241996A Expired - Lifetime JPH0653272B2 (en) | 1988-09-27 | 1988-09-27 | Wastewater purification material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0653272B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH084796B2 (en) * | 1992-05-01 | 1996-01-24 | 東 川副 | Biological treatment material and method of using the same |
| GB2298645B (en) * | 1995-03-08 | 1999-01-06 | David Evans | Oil degradation apparatus |
| JP3298562B2 (en) * | 1999-05-31 | 2002-07-02 | 松下電器産業株式会社 | Denitrification accelerator and water treatment method using this denitrification accelerator |
| JP4471216B2 (en) * | 2005-03-29 | 2010-06-02 | デンカエンジニアリング株式会社 | Microbial carrier with nitrohumate |
| JP4849481B2 (en) * | 2008-03-18 | 2012-01-11 | 中国電力株式会社 | Microorganism immobilization support, DHS reactor, and biological nitrification denitrification apparatus |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49100847A (en) * | 1973-01-30 | 1974-09-24 | ||
| JPS5341064A (en) * | 1976-09-25 | 1978-04-14 | Azuma Kawazoe | Sewage treating apparatus |
| JPS6136472A (en) * | 1984-07-26 | 1986-02-21 | 余合住金産業株式会社 | Hinge with catch function |
-
1988
- 1988-09-27 JP JP63241996A patent/JPH0653272B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0290998A (en) | 1990-03-30 |
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