JP2019000802A - Water treatment method and water treatment equipment - Google Patents
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Classifications
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- 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
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- Biological Treatment Of Waste Water (AREA)
Abstract
Description
本発明は、微生物を付着させたスポンジ担体の存在下で被処理水の生物処理を行う水処理方法および水処理装置に関する。 The present invention relates to a water treatment method and a water treatment apparatus for performing biological treatment of water to be treated in the presence of a sponge carrier to which microorganisms are attached.
近年、浄化槽や食品工場等の中小規模の排水処理設備や海外の下水処理場等において、流動担体を用いた生物処理法が導入されている。流動担体を用いた生物処理法は、通常の浮遊式活性汚泥法に比較して高負荷処理が可能であることから、反応槽をコンパクト化することができ、また汚泥沈降性を考慮して処理を行わなくてもよく、従来法より運転管理が容易であるため、普及している。 In recent years, biological treatment methods using a fluid carrier have been introduced in small- and medium-sized wastewater treatment facilities such as septic tanks and food factories, and overseas sewage treatment plants. The biological treatment method using a fluid carrier is capable of high load treatment compared to the normal floating activated sludge method, so the reaction tank can be made compact and the treatment can be performed considering sludge settling. This is popular because it is easier to manage than the conventional method.
最近では、汚泥発生量の削減を目的として、流動担体として特定の担体を採用して、多段生物処理する提案がされている（特許文献１，２参照）。また、油脂含有排水向けに特定の担体を使用することも提案されている（特許文献３参照）。 Recently, for the purpose of reducing the amount of sludge generated, a proposal has been made to employ a specific carrier as a fluid carrier and perform multistage biological treatment (see Patent Documents 1 and 2). It has also been proposed to use a specific carrier for fat and oil-containing wastewater (see Patent Document 3).
流動担体を用いた生物処理においては、より高負荷処理すること、特に、分解速度が比較的遅い難分解性の有機物やアンモニア等を含む被処理水において、処理速度の向上が望まれている。 In biological treatment using a fluid carrier, it is desired to perform a higher load treatment, particularly in water to be treated containing a hardly-degradable organic substance or ammonia having a relatively slow degradation rate.
本発明の目的は、流動担体を用いた生物処理において、処理速度を向上させることが可能な水処理方法および水処理装置を提供することにある。 An object of the present invention is to provide a water treatment method and a water treatment apparatus capable of improving the treatment speed in biological treatment using a fluid carrier.
本発明は、微生物を付着させたスポンジ担体の存在下で被処理水の生物処理を行う生物処理工程を含み、前記スポンジ担体は、（１）セル数が３０個／２５ｍｍ以上である、および、（２）表面積が３，０００ｍ２／ｍ３以上であるの条件のうち少なくとも１つを満たす疎水性ポリウレタン担体である、水処理方法である。 The present invention includes a biological treatment step of performing biological treatment of water to be treated in the presence of a sponge carrier to which microorganisms are attached, wherein the sponge carrier is (1) the number of cells is 30/25 mm or more, and (2) The water treatment method is a hydrophobic polyurethane carrier that satisfies at least one of the conditions that the surface area is 3,000 m 2 / m 3 or more.
前記水処理方法において、前記スポンジ担体の生物付着量は、５００ｍｇ／Ｌ以上であることが好ましい。 In the water treatment method, it is preferable that the amount of biofouling of the sponge carrier is 500 mg / L or more.
前記水処理方法において、前記生物処理を開始する前に、活性汚泥、微生物製剤、および培養した微生物のうち少なくとも１つをあらかじめ前記被処理水に添加することが好ましい。 In the water treatment method, it is preferable to add at least one of activated sludge, a microbial preparation, and cultured microorganisms to the water to be treated in advance before starting the biological treatment.
前記水処理方法において、前記被処理水は、有機物およびアンモニアのうち少なくとも１つを含むことが好ましい。 In the water treatment method, it is preferable that the water to be treated contains at least one of an organic substance and ammonia.
また、本発明は、微生物を付着させたスポンジ担体の存在下で被処理水の生物処理を行う生物処理手段を有し、前記スポンジ担体は、（１）セル数が３０個／２５ｍｍ以上である、および、（２）表面積が３，０００ｍ２／ｍ３以上であるの条件のうち少なくとも１つを満たす疎水性ポリウレタン担体である、水処理装置である。 In addition, the present invention has a biological treatment means for performing biological treatment of water to be treated in the presence of a sponge carrier to which microorganisms are attached, and the sponge carrier has (1) the number of cells is 30/25 mm or more. And (2) a water treatment device, which is a hydrophobic polyurethane carrier that satisfies at least one of the conditions that the surface area is 3,000 m 2 / m 3 or more.
前記水処理装置において、前記スポンジ担体の生物付着量は、５００ｍｇ／Ｌ以上であることが好ましい。 In the water treatment apparatus, it is preferable that the biodeposition amount of the sponge carrier is 500 mg / L or more.
前記水処理装置において、前記生物処理を開始する前に、活性汚泥、微生物製剤、および培養した微生物のうち少なくとも１つをあらかじめ前記被処理水に添加することが好ましい。 In the water treatment apparatus, it is preferable to add at least one of activated sludge, a microbial preparation, and cultured microorganisms to the treated water in advance before starting the biological treatment.
前記水処理装置において、前記被処理水は、有機物およびアンモニアのうち少なくとも１つを含むことが好ましい。 In the water treatment apparatus, it is preferable that the water to be treated contains at least one of an organic substance and ammonia.
本発明では、流動担体を用いた生物処理において、処理速度を向上させることが可能な水処理方法および水処理装置を提供することができる。 In the present invention, it is possible to provide a water treatment method and a water treatment apparatus capable of improving the treatment speed in biological treatment using a fluid carrier.
本発明の実施の形態について以下説明する。本実施形態は本発明を実施する一例であって、本発明は本実施形態に限定されるものではない。 Embodiments of the present invention will be described below. This embodiment is an example for carrying out the present invention, and the present invention is not limited to this embodiment.
本発明の実施形態に係る水処理装置の一例の概略を図１に示し、その構成について説明する。 An example of a water treatment apparatus according to an embodiment of the present invention is schematically shown in FIG.
水処理装置１は、微生物を付着させたスポンジ担体の存在下で被処理水の生物処理を行う生物処理手段として、生物処理槽１０を備える。 The water treatment apparatus 1 includes a biological treatment tank 10 as biological treatment means for performing biological treatment of water to be treated in the presence of a sponge carrier to which microorganisms are attached.
図１の水処理装置１において、生物処理槽１０の被処理水入口には、被処理水配管１４が接続され、処理水出口には、処理水配管１６が接続されている。生物処理槽１０内には、槽内を爆気する曝気手段として、曝気装置１２が設置されていてもよい。 In the water treatment apparatus 1 of FIG. 1, a treated water pipe 14 is connected to the treated water inlet of the biological treatment tank 10, and a treated water pipe 16 is connected to the treated water outlet. In the biological treatment tank 10, an aeration apparatus 12 may be installed as aeration means for exploding the inside of the tank.
生物処理槽１０内には、スポンジ担体１８が投入されている。スポンジ担体１８は、複数の細孔が形成された多孔体であり、
（１）セル数（細孔の数）が３０個／２５ｍｍ以上である、および、
（２）表面積が３，０００ｍ２／ｍ３以上である
の条件のうち少なくとも１つを満たす疎水性ポリウレタン担体である。
A sponge carrier 18 is placed in the biological treatment tank 10. The sponge carrier 18 is a porous body in which a plurality of pores are formed,
(1) The number of cells (number of pores) is 30/25 mm or more, and
(2) A hydrophobic polyurethane carrier that satisfies at least one of the conditions that the surface area is 3,000 m 2 / m 3 or more.
生物処理槽１０内に、スクリーン３２等の分離手段を設置してもよい。図での説明は省略するが、生物処理槽１０には、槽内の水温を加温する電気ヒータ等の加温装置（加温手段）、槽内のｐＨを調整するために槽内に酸またはアルカリ等のｐＨ調整剤を添加するｐＨ調整装置（ｐＨ調整手段）等が、適宜設置されていてもよい。生物処理槽１０の前段にｐＨ調整を行うためのｐＨ調整槽を設けてもよい。 Separation means such as a screen 32 may be installed in the biological treatment tank 10. Although not shown in the figure, the biological treatment tank 10 has a heating device (heating means) such as an electric heater for heating the water temperature in the tank, and an acid in the tank to adjust the pH in the tank. Alternatively, a pH adjusting device (pH adjusting means) for adding a pH adjusting agent such as alkali may be appropriately installed. You may provide the pH adjustment tank for adjusting pH in the front | former stage of the biological treatment tank 10. FIG.
本実施形態に係る水処理方法および水処理装置１の動作について説明する。 The operation of the water treatment method and the water treatment apparatus 1 according to this embodiment will be described.
例えば有機物、アンモニア等のうち少なくとも１つを含む被処理水は、被処理水配管１４を通して生物処理槽１０に供給される。必要に応じて、加温装置により被処理水を加温したり、曝気装置１２により生物処理槽１０内を曝気したり、ｐＨ調整装置により被処理水のｐＨを調整してもよい。生物処理槽１０内において、被処理水中の有機物、アンモニア等が、スポンジ担体１８に付着した微生物により分解される（生物処理工程）。生物処理が行われた処理水は、処理水配管１６を通して排出される。 For example, to-be-treated water containing at least one of organic matter, ammonia and the like is supplied to the biological treatment tank 10 through the to-be-treated water pipe 14. If necessary, the water to be treated may be heated by a heating device, the inside of the biological treatment tank 10 may be aerated by the aeration device 12, or the pH of the water to be treated may be adjusted by a pH adjusting device. In the biological treatment tank 10, organic matter, ammonia, and the like in the water to be treated are decomposed by microorganisms attached to the sponge carrier 18 (biological treatment step). The treated water subjected to the biological treatment is discharged through the treated water pipe 16.
有機物、アンモニア等を分解する微生物は、生物処理槽１０に投入されたスポンジ担体１８の表面や細孔内に付着して、担体上に生物膜が形成される。通常、この担体に形成された生物膜中の微生物により有機物、アンモニア等が分解される。本発明者らは、スポンジ担体１８の材質、セル数、表面積、生物付着量等が生物処理性能に及ぼす効果について検討を行った。この結果、疎水性のポリウレタン製スポンジ担体、特に、単位あたりのセル数が多い担体、表面積が大きい担体、または単位あたりのセル数が多く、かつ表面積が大きい担体において、生物処理の処理速度が高いことを見出した。疎水性で適切なセル数または表面積のポリウレタン製スポンジ担体を生物処理槽１０に添加することで、生物処理の処理速度を向上させることが可能となる。 Microorganisms that decompose organic matter, ammonia, and the like adhere to the surface and pores of the sponge carrier 18 introduced into the biological treatment tank 10, and a biofilm is formed on the carrier. Usually, organic matter, ammonia and the like are decomposed by microorganisms in the biofilm formed on the carrier. The present inventors examined the effects of the material of the sponge carrier 18, the number of cells, the surface area, the amount of biological adhesion, etc. on the biological treatment performance. As a result, the treatment speed of biological treatment is high in a hydrophobic polyurethane sponge carrier, particularly a carrier having a large number of cells per unit, a carrier having a large surface area, or a carrier having a large number of cells per unit and a large surface area. I found out. By adding a hydrophobic sponge sponge carrier having an appropriate cell number or surface area to the biological treatment tank 10, it is possible to improve the treatment speed of the biological treatment.
また、疎水性のスポンジ担体は親水性のスポンジ担体よりも初期付着汚泥量が多いことを見出した。詳細なメカニズムは不明であるが、被処理水中の高分子物質や活性汚泥中の高分子のバイオポリマ等が疎水性の担体表面に付着しやすく、それをきっかけに微生物の付着量が多くなると想定される。さらに、表面が比較的疎水性である微生物に対し、疎水性の担体は、疎水性相互作用により付着性の点で有利であると考えられる。芽胞を形成したバチルス属や土壌微生物の中でも増殖速度の遅い細菌は、表面が比較的疎水性であるとされている。土壌微生物の中でも増殖速度の遅い細菌としては、例えば、ニトロソモナス属等の硝化菌が挙げられ、これらも表面が比較的疎水性の可能性がある。 It was also found that the hydrophobic sponge carrier has a larger initial sludge amount than the hydrophilic sponge carrier. Although the detailed mechanism is unknown, it is assumed that the polymer substance in the treated water and the polymer biopolymer in the activated sludge are likely to adhere to the surface of the hydrophobic carrier, which leads to an increase in the amount of microorganisms attached. Is done. Furthermore, for microorganisms whose surface is relatively hydrophobic, hydrophobic carriers are considered advantageous in terms of adhesion due to hydrophobic interactions. Bacteria with a slow growth rate among the genus Bacillus and soil microorganisms that form spores are said to have a relatively hydrophobic surface. Among the soil microorganisms, bacteria with a slow growth rate include, for example, nitrifying bacteria such as the genus Nitrosomonas, and these surfaces may also have a relatively hydrophobic surface.
本実施形態に係る水処理方法および水処理装置により、流動担体を用いた生物処理を、より高負荷にすることが可能となる。また、難分解性の有機物やアンモニア等を含む被処理水の生物処理において、長い反応時間が必要であった生物処理装置をコンパクトにすることが可能となる。本実施形態に係る水処理方法および水処理装置では、１段の生物処理において、処理速度を向上させることが可能である。 With the water treatment method and the water treatment apparatus according to this embodiment, it is possible to increase the load of biological treatment using a fluid carrier. In addition, a biological treatment apparatus that requires a long reaction time can be made compact in biological treatment of water to be treated containing persistent organic substances and ammonia. In the water treatment method and the water treatment apparatus according to the present embodiment, the treatment speed can be improved in one-stage biological treatment.
本実施形態の処理対象とする被処理水は、例えば、有機物、アンモニア、懸濁物質等を含む水であり、有機物およびアンモニアのうち少なくとも１つを含むことが好ましい。処理対象とする被処理水としては、例えば、下水処理、食品工場をはじめ、化学工場、半導体工場、液晶工場、紙パルプ工場、その他の分野から排出される有機物含有排水であって、生物処理法が適用可能であるものが挙げられる。また、生物処理は可能であるが、処理速度が遅く、大きな処理装置となるような排水に対しても有効である。例えば、アンモニアを酸化する硝化処理、液晶工場で使用される水酸化テトラメチルアンモニウム（ＴＭＡＨ）処理、油脂処理等に対して有効である。 For example, the water to be treated in the present embodiment is water containing organic matter, ammonia, suspended matter, etc., and preferably contains at least one of organic matter and ammonia. Examples of water to be treated include organic wastewater discharged from sewage treatment, food factories, chemical factories, semiconductor factories, liquid crystal factories, paper pulp factories, and other fields. Is applicable. In addition, although biological treatment is possible, it is also effective for wastewater that has a slow treatment speed and becomes a large treatment apparatus. For example, it is effective for a nitrification treatment for oxidizing ammonia, a tetramethylammonium hydroxide (TMAH) treatment used in a liquid crystal factory, a fat treatment, and the like.
スポンジ担体１８のセル数は、生物処理の処理速度を向上させる点で、好ましくは３０個／２５ｍｍ以上であり、より好ましくは３０個／２５ｍｍ以上、１００個／２５ｍｍ以下であり、さらに好ましくは４０個／２５ｍｍ以上、１００個／２５ｍｍ以下であり、特に好ましくは４６個／２５ｍｍ以上、１００個／２５ｍｍ以下である。スポンジ担体１８のセル数が３０個／２５ｍｍ未満であると、生物処理の処理速度の向上効果が現れにくい場合があり、疎水性のポリウレタン製スポンジでは１００個／２５ｍｍを超えると、通気性の低下により生物処理槽で流動しにくくなる場合がある。 The number of cells of the sponge carrier 18 is preferably 30 pieces / 25 mm or more, more preferably 30 pieces / 25 mm or more, and 100 pieces / 25 mm or less, and further preferably 40 points in terms of improving the treatment speed of biological treatment. The number of pieces / 25 mm or more and 100 pieces / 25 mm or less, particularly preferably 46 pieces / 25 mm or more and 100 pieces / 25 mm or less. If the number of cells of the sponge carrier 18 is less than 30/25 mm, the effect of improving the treatment speed of the biological treatment may be difficult to appear, and if the hydrophobic polyurethane sponge exceeds 100/25 mm, the air permeability decreases. May be difficult to flow in the biological treatment tank.
スポンジ担体１８のセル数は、ＪＩＳ Ｋ ６４００−１（附属書１）に基づいて求められる。具体的には、（１）厚さ１０ｍｍ、幅および長さ１００ｍｍ以上の試験片（スポンジ担体１８）を採取、（２）倍率が５倍以上の拡大鏡で、拡大鏡が左右に移動でき、その移動距離を測定できるメモリを装備した試験装置を準備、（３）当該試験装置の台の上に試験片を載せ、拡大鏡を移動させながら直線上１０ｍｍ間のセルの個数を数える（測定箇所は３箇所）、（４）Ｎ＝ｎ×２．５（Ｎはセル数（個／２５ｍｍ）、ｎは１０ｍｍ間のセルの個数）によってセル数Ｎを算出し、３箇所の平均値をＪＩＳ Ｚ ８４０１によって丸めの幅１で丸める。 The number of cells of the sponge carrier 18 is determined based on JIS K 6400-1 (Appendix 1). Specifically, (1) a specimen (sponge carrier 18) having a thickness of 10 mm, a width and a length of 100 mm or more is collected, (2) a magnifying glass having a magnification of 5 times or more, and the magnifying glass can be moved to the left and right. Prepare a test device equipped with a memory that can measure the movement distance. (3) Place a test piece on the table of the test device, and count the number of cells between 10mm on the straight line while moving the magnifying glass. 3), (4) N = n × 2.5 (where N is the number of cells (25 cells), n is the number of cells between 10 mm), and the average value of the three locations is calculated according to JIS. Round with a width of 1 by Z 8401.
スポンジ担体１８の表面積は、生物処理の処理速度を向上させる点で、好ましくは３，０００ｍ２／ｍ３以上であり、より好ましくは３５００ｍ２／ｍ３以上であり、さらに好ましくは４０００ｍ２／ｍ３以上であり、特に好ましくは４５００ｍ２／ｍ３以上である。スポンジ担体１８の表面積の上限は、セル数や担体の大きさ等を考慮して決めればよく、特に制限はない。スポンジ担体１８の表面積が３，０００ｍ２／ｍ３未満であると、生物処理の処理速度の向上効果が現れにくい場合がある。スポンジ担体１８の表面積は、気体吸着法や水銀圧入法を用いて測定することができる。 The surface area of the sponge carrier 18, from the viewpoint of improving the processing speed of the biological treatment, preferably at 3,000 m 2 / m 3 or more, more preferably 3500 m 2 / m 3 or more, more preferably 4000 m 2 / m 3 or more, particularly preferably 4500 m 2 / m 3 or more. The upper limit of the surface area of the sponge carrier 18 may be determined in consideration of the number of cells, the size of the carrier, etc., and is not particularly limited. When the surface area of the sponge carrier 18 is less than 3,000 m 2 / m 3 , the effect of improving the treatment speed of the biological treatment may be difficult to appear. The surface area of the sponge carrier 18 can be measured using a gas adsorption method or a mercury intrusion method.
スポンジ担体１８の生物付着量は、生物処理の処理速度を向上させる点で、５００ｍｇ／Ｌ以上であることが好ましく、１０００ｍｇ／Ｌ以上であることがより好ましい。スポンジ担体１８の生物付着量は多ければ多い方がよく、特に上限はないが、上限は、例えば、５０００ｍｇ／Ｌである。スポンジ担体１８の生物付着量が５００ｍｇ／Ｌ未満であると、生物処理の処理速度の向上効果が現れにくい場合があり、５０００ｍｇ／Ｌを超えると、無機物の付着等が疑われ、流動させるための曝気量が大きくなる場合がある。 The biological adhesion amount of the sponge carrier 18 is preferably 500 mg / L or more, and more preferably 1000 mg / L or more from the viewpoint of improving the treatment speed of the biological treatment. The larger the amount of biodeposition of the sponge carrier 18, the better. There is no particular upper limit, but the upper limit is, for example, 5000 mg / L. If the amount of the biological adherence of the sponge carrier 18 is less than 500 mg / L, the effect of improving the treatment speed of the biological treatment may be difficult to appear. If it exceeds 5000 mg / L, the adhesion of the inorganic substance is suspected and fluidized. The amount of aeration may increase.
スポンジ担体１８は、疎水性ポリウレタン担体であり、例えば、エーテル系やエステル系等のポリウレタンフォームを使用することができる。 The sponge carrier 18 is a hydrophobic polyurethane carrier. For example, an ether-based or ester-based polyurethane foam can be used.
スポンジ担体１８の形状は、特に限定されず、立方体状等の四角体状、粒状、球状、ペレット状、円筒状、繊維状、フィルム状等が挙げられる。 The shape of the sponge carrier 18 is not particularly limited, and examples thereof include a rectangular shape such as a cubic shape, a granular shape, a spherical shape, a pellet shape, a cylindrical shape, a fibrous shape, and a film shape.
スポンジ担体１８の大きさは、特に限定されず、生物処理槽１０の大きさやスポンジ担体１８の形状等に応じて、適宜設定されればよく、例えば、立方体状であれば、一辺の長さが３〜２０ｍｍの範囲が好ましく、球状であれば、径が０．５ｍｍ〜２０ｍｍ程度の範囲が好ましい。スポンジ担体１８は、例えば、立方体状であり、大きさが３〜１０ｍｍの範囲の担体を用いることが好ましい。スポンジ担体１８の大きさが３ｍｍより小さいと、時間に伴い担体が磨耗して効果が低くなる場合があり、１０ｍｍより大きい場合には、比表面積が小さく、処理速度の向上効果が低くなる場合がある。スポンジ担体１８の大きさは、ノギスまたはマイクロスコープ等を用いて測定することができる。 The size of the sponge carrier 18 is not particularly limited, and may be set as appropriate according to the size of the biological treatment tank 10, the shape of the sponge carrier 18, and the like. A range of 3 to 20 mm is preferable, and if the shape is spherical, a range of about 0.5 mm to 20 mm in diameter is preferable. The sponge carrier 18 is, for example, a cubic shape, and a carrier having a size in the range of 3 to 10 mm is preferably used. If the size of the sponge carrier 18 is smaller than 3 mm, the carrier may wear with time and the effect may be reduced. If the sponge carrier 18 is larger than 10 mm, the specific surface area may be small and the effect of improving the processing speed may be reduced. is there. The size of the sponge carrier 18 can be measured using a caliper or a microscope.
スポンジ担体１８の比重は、生物処理槽１０内部に流動状態を形成するために、少なくとも１．０より大きく、真比重として、１．１以上、または見かけ比重として、１．０１以上のものが好ましい。 The specific gravity of the sponge carrier 18 is preferably at least greater than 1.0 and has a true specific gravity of 1.1 or higher, or an apparent specific gravity of 1.01 or higher in order to form a fluid state inside the biological treatment tank 10. .
生物処理槽１０へのスポンジ担体１８の充填量（投入量）は、経済性、流動性等の点で、生物処理槽１０の容積に対して３〜４０容量％の範囲であることが好ましく、５〜３０容量％の範囲であることがより好ましい。スポンジ担体１８の投入量が生物処理槽１０の容積に対して３容量％未満であると反応速度が小さくなる場合があり、４０容量％を超えるとスポンジ担体１８が流動しにくくなり、長期運転において汚泥による閉塞等で被処理水がショートパスし、処理水質が悪くなる場合がある。 The filling amount (input amount) of the sponge carrier 18 into the biological treatment tank 10 is preferably in the range of 3 to 40% by volume with respect to the volume of the biological treatment tank 10 in terms of economy, fluidity, and the like. More preferably, it is in the range of 5 to 30% by volume. When the input amount of the sponge carrier 18 is less than 3% by volume with respect to the volume of the biological treatment tank 10, the reaction rate may be reduced. When the amount of the sponge carrier 18 exceeds 40% by volume, the sponge carrier 18 becomes difficult to flow. The treated water may be short-passed due to sludge blockage and the quality of the treated water may deteriorate.
スポンジ担体１８の充填量は、３〜４０容量％の範囲で充填し、生物処理槽１０内の汚泥濃度であるＭＬＶＳＳ濃度が５００ｍｇ／Ｌ以上とすることが好ましく、１，０００ｍｇ／Ｌ以上とすることがより好ましい。 The filling amount of the sponge carrier 18 is 3 to 40% by volume, and the MLVSS concentration, which is the sludge concentration in the biological treatment tank 10, is preferably 500 mg / L or more, and 1,000 mg / L or more. It is more preferable.
生物処理槽１０内に、スクリーン３２等の分離手段を設置し、スポンジ担体１８を分離して処理を行うことが好ましい。 It is preferable that separation means such as a screen 32 is installed in the biological treatment tank 10 to separate the sponge carrier 18 and perform the treatment.
生物処理工程において、微生物の育成等の点から、生物処理槽１０のｐＨは、例えば、弱酸性〜弱アルカリ性に調整されることが好ましく、６から８の範囲に調整されることがより好ましい。 In the biological treatment step, the pH of the biological treatment tank 10 is preferably adjusted to, for example, weakly acidic to weakly alkaline, and more preferably in the range of 6 to 8, from the viewpoint of growth of microorganisms.
生物処理は、好気条件下で行うことが好ましく、例えば、生物処理槽１０内に曝気装置１２を設置して、生物処理槽１０内の溶存酸素濃度が０．５ｍｇ／Ｌ以上、好ましくは１ｍｇ／Ｌ以上となるように酸素を供給することが好ましい。 The biological treatment is preferably performed under aerobic conditions. For example, the aeration apparatus 12 is installed in the biological treatment tank 10 and the dissolved oxygen concentration in the biological treatment tank 10 is 0.5 mg / L or more, preferably 1 mg. It is preferable to supply oxygen so as to be at least / L.
処理水質の向上の点等から、生物処理槽１０の後段に加圧浮上装置や沈澱池等を設置したり、生物処理槽１０内に膜分離ユニットを設置したりしてもよい。 From the viewpoint of improving the quality of the treated water, a pressurized flotation device, a sedimentation basin, or the like may be installed downstream of the biological treatment tank 10, or a membrane separation unit may be installed in the biological treatment tank 10.
被処理水の有機物の濃度は、例えば、５０〜１００００ｍｇ／Ｌの範囲であり、アンモニアの濃度は、例えば、２０〜１０００ｍｇ／Ｌの範囲である。 The concentration of organic matter in the water to be treated is, for example, in the range of 50 to 10,000 mg / L, and the concentration of ammonia is, for example, in the range of 20 to 1000 mg / L.
本実施形態に係る水処理方法および水処理装置により、生物処理における硝化速度を、例えば、０．２ｋｇＮ／ｍ３／ｄ以上とすることができ、さらには０．３ｋｇＮ／ｍ３／ｄ以上とすることができる。これにより、生物処理装置をコンパクトにすることが可能となる。 With the water treatment method and the water treatment apparatus according to the present embodiment, the nitrification rate in biological treatment can be set to, for example, 0.2 kgN / m 3 / d or more, and further, 0.3 kgN / m 3 / d or more. can do. Thereby, the biological treatment apparatus can be made compact.
疎水性のスポンジ担体１８は水中に投入しても水面に浮上してしまい、自然に微生物が付着して生物処理槽１０内で流動し、処理が行われるまでに、数週間の立上げ期間がかかる場合がある。その場合には、担体の親水化処理や親水性スポンジ担体を用いることが従来提案されているが、本発明者らが鋭意検討した結果、生物処理を開始する前に、活性汚泥、微生物製剤、および培養した微生物のうち少なくとも１つをあらかじめ疎水性のスポンジ担体１８が投入された被処理水に添加してから、被処理水の通水を開始することで、立上げ期間が短縮されることを見出した。 The hydrophobic sponge carrier 18 floats on the surface of the water even if it is put into water, the microorganisms naturally adhere and flow in the biological treatment tank 10, and it takes several weeks to start up before the treatment is performed. It may take such a case. In that case, it has been conventionally proposed to use a hydrophilic treatment of the carrier or a hydrophilic sponge carrier, but as a result of intensive studies by the present inventors, before starting the biological treatment, activated sludge, microbial preparation, In addition, at least one of the cultured microorganisms is added to the water to be treated in which the hydrophobic sponge carrier 18 has been added in advance, and then the flow of the water to be treated is started, thereby shortening the startup period. I found.
この場合は、活性汚泥、微生物製剤、および培養した微生物のうち少なくとも１つを生物処理槽１０内に添加する添加装置（添加手段）を、生物処理槽１０に設置すればよい。 In this case, an adding device (adding means) for adding at least one of activated sludge, microbial preparation, and cultured microorganisms to the biological treatment tank 10 may be installed in the biological treatment tank 10.
図２に、このような添加装置（添加手段）を備える水処理装置の一例の概略構成を示す。図２の水処理装置３は、生物処理槽１０と、活性汚泥、微生物製剤、および培養した微生物のうち少なくとも１つを貯留するための貯留槽２０とを備える。貯留槽２０の出口と生物処理槽１０とは、添加配管２２により接続されている。 In FIG. 2, schematic structure of an example of a water treatment apparatus provided with such an addition apparatus (addition means) is shown. The water treatment apparatus 3 of FIG. 2 includes a biological treatment tank 10 and a storage tank 20 for storing at least one of activated sludge, a microbial preparation, and cultured microorganisms. The outlet of the storage tank 20 and the biological treatment tank 10 are connected by an addition pipe 22.
水処理装置３では、装置の立上げにおいて、適切なセル数または表面積の疎水性のスポンジ担体１８が生物処理槽１０に投入された後、活性汚泥、微生物製剤、および培養した微生物のうち少なくとも１つが貯留槽２０から添加配管２２を通して生物処理槽１０に添加されて、微生物がスポンジ担体１８に固定化された後、生物処理が開始される。例えば、スポンジ担体１８の上から活性汚泥、微生物製剤、および培養した微生物のうち少なくとも１つを添加してから、被処理水の通水を開始すればよい。これにより、疎水性のスポンジ担体１８が流動して処理できる期間を短縮可能であり、試運転期間、およびそれに伴うコストを短縮することが可能となる。また、安定した高負荷処理が可能となる。 In the water treatment apparatus 3, at the time of starting up the apparatus, after the hydrophobic sponge carrier 18 having an appropriate cell number or surface area is put into the biological treatment tank 10, at least one of activated sludge, microbial preparation, and cultured microorganisms is included. One is added from the storage tank 20 to the biological treatment tank 10 through the addition pipe 22, and the microorganisms are immobilized on the sponge carrier 18, and then biological treatment is started. For example, after adding at least one of activated sludge, microbial preparation, and cultured microorganisms from above the sponge carrier 18, the water to be treated may be passed. As a result, the period during which the hydrophobic sponge carrier 18 can flow and be processed can be shortened, and the trial run period and associated costs can be shortened. In addition, stable high load processing is possible.
活性汚泥、微生物製剤、および培養した微生物のうち少なくとも１つの添加量は、例えば、５００ｍｇ／Ｌ以上であり、好ましくは１０００ｍｇ／Ｌ以上である。添加量の上限には特に限定はないが、例えば、５０００ｍｇ／Ｌ以下である。添加量が５００ｍｇ／Ｌ未満であると、試運転期間の短縮効果が現れにくくなる場合があり、５０００ｍｇ／Ｌを超えると、一部は担体に付着することなく処理水に流出しやすくなり、経済性の点で好ましくない場合がある。 The added amount of at least one of the activated sludge, the microbial preparation, and the cultured microorganism is, for example, 500 mg / L or more, and preferably 1000 mg / L or more. Although there is no limitation in particular in the upper limit of addition amount, For example, it is 5000 mg / L or less. If the amount added is less than 500 mg / L, the effect of shortening the trial run period may be difficult to appear. If it exceeds 5000 mg / L, some will easily flow out into the treated water without adhering to the carrier, resulting in economic efficiency. In some cases, it is not preferable.
用いられる活性汚泥、微生物、微生物製剤については、通常の生物処理に用いられるものであればよく、特に限定されない。なお、微生物製剤とは、培養した微生物を含む製剤であり、例えば、微生物を培養した培養液をそのまま用いたものや、培養した微生物を水等に分散した懸濁液としたものや、培養液や懸濁液等を凍結乾燥等により乾燥させたものである。微生物製剤の形態は特に限定はなく、例えば、液体状、粉末状、顆粒状等のものである。 The activated sludge, microorganisms, and microorganism preparations used are not particularly limited as long as they are used for normal biological treatment. The microorganism preparation is a preparation containing cultured microorganisms. For example, a preparation using a culture solution in which microorganisms are cultured, a suspension obtained by dispersing the cultured microorganisms in water, or a culture solution. Or a suspension or the like dried by lyophilization or the like. The form of the microbial preparation is not particularly limited, and examples thereof include liquids, powders, and granules.
活性汚泥としては、産業排水処理や下水処理に適用されている活性汚泥法や膜分離活性汚泥法の槽内汚泥を使用することができる。微生物としては、例えば、バチルス属、ニトロソモナス属等が挙げられる。微生物製剤としては、初期シーディング用や生物処理機能の改善用があり、代表的なバチルス属の微生物製剤、例えばエルビックＹＡ３００（日之出産業株式会社製）、セピアＲ５３１（オルガノ株式会社製）等を使用することができる。 As activated sludge, the sludge in the tank of the activated sludge method and the membrane separation activated sludge method currently applied to industrial wastewater treatment and sewage treatment can be used. Examples of the microorganism include Bacillus genus and Nitrosomonas genus. Microbial preparations include those for initial seeding and improvement of biological treatment functions, and use typical Bacilli microbial preparations such as Elbic YA300 (manufactured by Hinode Sangyo Co., Ltd.), Sepia R531 (manufactured by Organo Corporation), etc. can do.
装置の立上げにおいて、現場で培養した微生物を被処理水に添加してもよい。この場合は、例えば、微生物を培養するための培養手段として培養槽を、生物処理槽１０に設置すればよい。 In starting up the apparatus, microorganisms cultured in the field may be added to the water to be treated. In this case, for example, a culture tank may be installed in the biological treatment tank 10 as a culture means for culturing microorganisms.
図３に、このような培養槽（培養手段）を備える水処理装置の一例の概略構成を示す。図３の水処理装置５は、生物処理槽１０と、微生物を培養するための培養槽２４とを備える。被処理水配管１４から分岐した被処理水配管２６が培養槽２４の入口に接続され、培養槽２４の出口と生物処理槽１０とは、添加配管２８により接続されている。 In FIG. 3, schematic structure of an example of a water treatment apparatus provided with such a culture tank (culture means) is shown. The water treatment device 5 in FIG. 3 includes a biological treatment tank 10 and a culture tank 24 for culturing microorganisms. A treated water pipe 26 branched from the treated water pipe 14 is connected to the inlet of the culture tank 24, and the outlet of the cultured tank 24 and the biological treatment tank 10 are connected by an addition pipe 28.
水処理装置５では、装置の立上げにおいて、被処理水の一部が被処理水配管２６を通して培養槽２４に供給され、培養槽２４において微生物が培養される（培養工程）。適切なセル数または表面積の疎水性のスポンジ担体１８が生物処理槽１０に投入された後、培養された微生物が培養槽２４から添加配管２８を通して生物処理槽１０に添加されて、微生物がスポンジ担体１８に固定化された後、生物処理が開始される。これにより、疎水性のスポンジ担体１８が流動して処理できる期間を短縮可能であり、試運転期間、およびそれに伴うコストを短縮することが可能となる。また、安定した高負荷処理が可能となる。 In the water treatment apparatus 5, when the apparatus is started up, a part of the water to be treated is supplied to the culture tank 24 through the pipe for treatment water 26 and microorganisms are cultured in the culture tank 24 (culture process). After the hydrophobic sponge carrier 18 having the appropriate cell number or surface area is put into the biological treatment tank 10, the cultured microorganisms are added from the culture tank 24 to the biological treatment tank 10 through the addition pipe 28, and the microorganisms are added to the sponge carrier. After being immobilized on 18, biological treatment is started. As a result, the period during which the hydrophobic sponge carrier 18 can flow and be processed can be shortened, and the trial run period and associated costs can be shortened. In addition, stable high load processing is possible.
以下、実施例および比較例を挙げ、本発明をより具体的に詳細に説明するが、本発明は、以下の実施例に限定されるものではない。 Hereinafter, although an example and a comparative example are given and the present invention is explained more concretely in detail, the present invention is not limited to the following examples.
＜実施例１＞
表１に示す組成の原水を被処理水として用いて実験を行った。
<Example 1>
An experiment was conducted using raw water having the composition shown in Table 1 as water to be treated.
（実験装置）
図４に示すような実験装置を用いて、表２および下記に示す実験条件で生物処理を実施した。図４に示す実験装置は、生物処理槽１０の前段にｐＨ調整を行うためのｐＨ調整槽３０を設けてある。硝化速度（ｋｇＮ／ｍ３／ｄ）および担体への付着汚泥量（生物付着量）（ｍｇ／Ｌ）を表３に示す。図５に、疎水性ポリウレタン製スポンジ担体のセル数（個／２５ｍｍ）と硝化速度（ｋｇＮ／ｍ３／ｄ）との関係を示し、図６に、疎水性ポリウレタン製スポンジ担体の表面積（ｍ２／ｍ３）と硝化速度（ｋｇＮ／ｍ３／ｄ）との関係を示す。なお、スポンジ担体のセル数は、ＪＩＳ Ｋ ６４００−１（附属書１）に基づいて求めた。スポンジ担体の表面積は、気体吸着法を用いて担体の単位重量当たりの面積を測定し、単位体積当たりの面積に変換した。
(Experimental device)
Using an experimental apparatus as shown in FIG. 4, biological treatment was performed under the experimental conditions shown in Table 2 and below. The experimental apparatus shown in FIG. 4 is provided with a pH adjusting tank 30 for adjusting pH in the previous stage of the biological treatment tank 10. Table 3 shows the nitrification rate (kgN / m 3 / d) and the amount of sludge adhering to the carrier (the amount of biological adhesion) (mg / L). FIG. 5 shows the relationship between the number of cells (cells / 25 mm) of a hydrophobic polyurethane sponge carrier and the nitrification rate (kgN / m 3 / d), and FIG. 6 shows the surface area (m 2 ) of the hydrophobic polyurethane sponge carrier. / M 3 ) and the nitrification rate (kgN / m 3 / d). The number of cells of the sponge carrier was determined based on JIS K 6400-1 (Appendix 1). The surface area of the sponge carrier was converted to the area per unit volume by measuring the area per unit weight of the carrier using the gas adsorption method.
（実験条件）
生物処理槽：容量４．１Ｌ
担体充填量：３０容量％
ｐＨ：中性７〜７．５
水温：２０℃
曝気量：５Ｌ／分
(Experimental conditions)
Biological treatment tank: 4.1L capacity
Carrier loading: 30% by volume
pH: neutral 7-7.5
Water temperature: 20 ° C
Aeration amount: 5L / min
（結果）
比較例１では、セル数、表面積が非常に多いポリビニルアルコール（ＰＶＡ）製の担体を用いたが、硝化速度は０．２ｋｇＮ／ｍ３／ｄであったのに対し、疎水性ポリウレタン製の担体はセル数が比較例１より小さいが、汚泥濃度が高く、硝化速度が高い結果となった。一方、疎水性ポリウレタン製の担体でも、セル数、表面積が小さい比較例２では、硝化速度が０．１ｋｇＮ／ｍ３／ｄとなった。上記の結果から、セル数が３０個／２５ｍｍ以上の疎水性ポリウレタンの担体を用いた場合、または、表面積が３，０００ｍ２／ｍ３以上の疎水性ポリウレタンの担体を用いた場合、生物処理の効率が１．５倍から３倍程度高くすることができた。
(result)
In Comparative Example 1, a support made of polyvinyl alcohol (PVA) having a very large number of cells and a large surface area was used, but the nitrification rate was 0.2 kgN / m 3 / d, whereas the support made of hydrophobic polyurethane Although the number of cells was smaller than that of Comparative Example 1, the sludge concentration was high and the nitrification rate was high. On the other hand, even in a carrier made of hydrophobic polyurethane, in Comparative Example 2 in which the number of cells and the surface area were small, the nitrification rate was 0.1 kgN / m 3 / d. From the above results, when a hydrophobic polyurethane carrier having 30 cells / 25 mm or more is used, or when a hydrophobic polyurethane carrier having a surface area of 3,000 m 2 / m 3 or more is used, biological treatment The efficiency could be increased by 1.5 to 3 times.
＜実施例２＞
表４に示す組成の有機物含有排水を原水（被処理水）として用いて実験を行った。
<Example 2>
Experiments were conducted using organic material-containing wastewater having the composition shown in Table 4 as raw water (treated water).
（実験装置）
図４に示すような実験装置を用いて、表５および下記に示す実験条件で生物処理を実施した。担体への付着汚泥量（ｍｇ／Ｌ）を表６に示す。
(Experimental device)
Using an experimental apparatus as shown in FIG. 4, biological treatment was performed under the experimental conditions shown in Table 5 and below. Table 6 shows the amount of sludge adhering to the carrier (mg / L).
（実験条件）
生物処理槽：容量２．０Ｌ
担体充填量：２０容量％
ｐＨ：中性７〜７．５
水温：２０℃
曝気量：１Ｌ／分
(Experimental conditions)
Biological treatment tank: Capacity 2.0L
Carrier filling amount: 20% by volume
pH: neutral 7-7.5
Water temperature: 20 ° C
Aeration rate: 1 L / min
（結果）
疎水性ポリウレタン製の担体でも、セル数、表面積が小さい比較例１の担体では、生物付着量は５００ｍｇ／Ｌ未満と非常に低かったのに対し、セル数、表面積が多い実施例１，２の疎水性ポリウレタン製の担体ではいずれも付着汚泥量が比較例１の２から３倍高く、生物処理の担体として、処理性能を向上させる効果が高いことを確認した。
(result)
Even in the carrier made of hydrophobic polyurethane, the carrier of Comparative Example 1 having a small number of cells and surface area had a very low biofouling amount of less than 500 mg / L. In all the carriers made of hydrophobic polyurethane, the amount of attached sludge was 2 to 3 times higher than that of Comparative Example 1, and it was confirmed that the effect of improving the treatment performance as a carrier for biological treatment was high.
＜実施例３＞
表７に示す食品工場の有機物含有排水を原水（被処理水）として用いて、活性汚泥、微生物製剤を添加する立上げ促進効果について実験を行った。活性汚泥としては、食品工場排水処理設備の汚泥を、微生物製剤としては、セピアＲ５３１（オルガノ株式会社製）を使用した。
<Example 3>
Experiments were conducted on the startup promotion effect of adding activated sludge and microbial preparations using organic matter-containing wastewater from food factories shown in Table 7 as raw water (treated water). As activated sludge, sludge from a wastewater treatment facility for food factories was used, and Sepia R531 (manufactured by Organo Corporation) was used as a microorganism preparation.
（実験装置）
図４に示すような実験装置に被処理水とスポンジ担体とを添加し、被処理水への微生物の添加なし（実施例３−１）、活性汚泥を５００ｍｇ／Ｌになるようにあらかじめ添加（実施例３−２）、微生物製剤を５００ｍｇ／Ｌになるようにあらかじめ添加（実施例３−３）のそれぞれの条件で添加後、曝気を開始し、表８および下記に示す実験条件で生物処理を行い、担体の流動性について経時的に確認した。
(Experimental device)
The water to be treated and the sponge carrier are added to the experimental apparatus as shown in FIG. 4, no microorganisms are added to the water to be treated (Example 3-1), and activated sludge is added in advance to 500 mg / L ( Example 3-2), a microorganism preparation was added in advance at 500 mg / L under the respective conditions (Example 3-3), aeration was started, and biological treatment was performed under the experimental conditions shown in Table 8 and below. The fluidity of the carrier was confirmed over time.
（実験条件）
生物処理槽：容量０．５Ｌ
担体充填量：２０容量％
ｐＨ：中性７〜７．５
水温：２０℃
曝気量：０．５Ｌ／分
(Experimental conditions)
Biological treatment tank: Capacity 0.5L
Carrier filling amount: 20% by volume
pH: neutral 7-7.5
Water temperature: 20 ° C
Aeration amount: 0.5 L / min
（結果）
実施例３−１の微生物の添加なしの条件では、担体が流動するまでに９８時間必要であったのに対し、実施例３−２の活性汚泥を添加した条件では４４時間、実施例３−３の微生物製剤を添加した条件では５５時間といずれも実施例３−１に比べて短く、生物処理を開始する前に活性汚泥や微生物製剤をあらかじめ被処理水に添加することで、流動させるまでの期間が短縮可能であることを確認した。
(result)
Under the conditions of Example 3-1 without addition of microorganisms, 98 hours were required for the carrier to flow, whereas with the conditions where activated sludge of Example 3-2 was added, 44 hours, Example 3- Under the conditions in which the microbial preparation of 3 was added, 55 hours and both were shorter than in Example 3-1, until the activated sludge and the microbial preparation were added to the water to be treated in advance before starting the biological treatment, until flowing. It was confirmed that the period of can be shortened.
以上の通り、（１）セル数が３０個／２５ｍｍ以上である、および、（２）表面積が３，０００ｍ２／ｍ３以上であるの条件のうち少なくとも１つを満たす疎水性ポリウレタン担体を用いることにより、流動担体を用いた生物処理において、処理速度を向上させることができた。 As described above, a hydrophobic polyurethane carrier satisfying at least one of the conditions (1) the number of cells is 30 cells / 25 mm or more and (2) the surface area is 3,000 m 2 / m 3 or more is used. As a result, the treatment speed could be improved in the biological treatment using the fluid carrier.
１，３，５ 水処理装置、１０ 生物処理槽、１２ 曝気装置、１４，２６ 被処理水配管、１６ 処理水配管、１８ スポンジ担体、２０ 貯留槽、２２，２８ 添加配管、２４ 培養槽、３０ ｐＨ調整槽、３２ スクリーン。 1,3,5 Water treatment apparatus, 10 Biological treatment tank, 12 Aeration apparatus, 14,26 Water pipe to be treated, 16 Treatment water pipe, 18 Sponge carrier, 20 Storage tank, 22,28 Addition pipe, 24 Culture tank, 30 pH adjustment tank, 32 screens.
Claims (8)
前記スポンジ担体は、
（１）セル数が３０個／２５ｍｍ以上である、および、
（２）表面積が３，０００ｍ２／ｍ３以上である
の条件のうち少なくとも１つを満たす疎水性ポリウレタン担体であることを特徴とする水処理方法。 Including a biological treatment step of performing biological treatment of water to be treated in the presence of a sponge carrier to which microorganisms are attached;
The sponge carrier is
(1) The number of cells is 30/25 mm or more, and
(2) A water treatment method characterized by being a hydrophobic polyurethane carrier that satisfies at least one of the conditions that the surface area is 3,000 m 2 / m 3 or more.
前記スポンジ担体の生物付着量は、５００ｍｇ／Ｌ以上であることを特徴とする水処理方法。 The water treatment method according to claim 1,
The water treatment method, wherein the sponge carrier has a biological adhesion amount of 500 mg / L or more.
前記生物処理を開始する前に、活性汚泥、微生物製剤、および培養した微生物のうち少なくとも１つをあらかじめ前記被処理水に添加することを特徴とする水処理方法。 The water treatment method according to claim 1 or 2,
Before starting the biological treatment, at least one of activated sludge, a microbial preparation, and cultured microorganisms is added in advance to the water to be treated.
前記被処理水は、有機物およびアンモニアのうち少なくとも１つを含むことを特徴とする水処理方法。 The water treatment method according to any one of claims 1 to 3,
The water to be treated includes at least one of an organic substance and ammonia.
前記スポンジ担体は、
（１）セル数が３０個／２５ｍｍ以上である、および、
（２）表面積が３，０００ｍ２／ｍ３以上である
の条件のうち少なくとも１つを満たす疎水性ポリウレタン担体であることを特徴とする水処理装置。 Having biological treatment means for biological treatment of treated water in the presence of a sponge carrier to which microorganisms are attached;
The sponge carrier is
(1) The number of cells is 30/25 mm or more, and
(2) A water treatment apparatus, which is a hydrophobic polyurethane carrier that satisfies at least one of the conditions that the surface area is 3,000 m 2 / m 3 or more.
前記スポンジ担体の生物付着量は、５００ｍｇ／Ｌ以上であることを特徴とする水処理装置。 The water treatment device according to claim 5,
The water treatment apparatus, wherein the sponge carrier has a biological adhesion amount of 500 mg / L or more.
前記生物処理を開始する前に、活性汚泥、微生物製剤、および培養した微生物のうち少なくとも１つをあらかじめ前記被処理水に添加することを特徴とする水処理装置。 The water treatment device according to claim 5 or 6,
Before starting the biological treatment, at least one of activated sludge, a microbial preparation, and cultured microorganisms is added in advance to the water to be treated.
前記被処理水は、有機物およびアンモニアのうち少なくとも１つを含むことを特徴とする水処理装置。 The water treatment apparatus according to any one of claims 5 to 7,
The water to be treated includes at least one of an organic substance and ammonia.
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| JP2013202512A (en) * | 2012-03-28 | 2013-10-07 | Cci Corp | Method of treating oil-and-fat- or fatty acid-containing waste water |
| JP2014124581A (en) * | 2012-12-26 | 2014-07-07 | Maezawa Kasei Ind Co Ltd | Carrier for water treatment, production method thereof, and wastewater treatment system |
| JP2016190203A (en) * | 2015-03-31 | 2016-11-10 | 国立大学法人北海道大学 | Wastewater treatment method and wastewater treatment device |
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| JP2009220079A (en) * | 2008-03-18 | 2009-10-01 | Inoac Corp | Water treatment carrier |
| JP2013202512A (en) * | 2012-03-28 | 2013-10-07 | Cci Corp | Method of treating oil-and-fat- or fatty acid-containing waste water |
| JP2014124581A (en) * | 2012-12-26 | 2014-07-07 | Maezawa Kasei Ind Co Ltd | Carrier for water treatment, production method thereof, and wastewater treatment system |
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