JP6284263B2 - Wastewater treatment method - Google Patents
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- JP6284263B2 JP6284263B2 JP2013218496A JP2013218496A JP6284263B2 JP 6284263 B2 JP6284263 B2 JP 6284263B2 JP 2013218496 A JP2013218496 A JP 2013218496A JP 2013218496 A JP2013218496 A JP 2013218496A JP 6284263 B2 JP6284263 B2 JP 6284263B2
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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
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Description
本発明は、例えば、高い含水比率であり、かつ汚泥などの固形物を含む汚泥水を急速に脱水し、かつ前記汚泥などの固形物を固化させるいわゆる高含水比濃縮汚泥の処理などを対象とした固化剤を使用した工場排水の処理方法に関するものである。 The present invention is directed to, for example, treatment of so-called high water content concentrated sludge having a high water content ratio and rapidly dewatering sludge water containing solids such as sludge and solidifying solids such as sludge. The present invention relates to a method for treating industrial wastewater using a solidifying agent.
すなわち、前記高含水比をなす濃縮汚泥を急速に吸湿脱水分離し、当該濃縮汚泥中に含有する固形物などを安定した固体として分離する処理方法である。 That is, this is a treatment method in which the concentrated sludge having a high water content is rapidly absorbed and dehydrated to separate the solids contained in the concentrated sludge as a stable solid.
即ち、当該濃縮汚泥中の水分を急速に脱水して水と固形物とに分離するとともに前記固形物を安定した疎水性に富んだ脱水汚泥にし、さらに、該脱水汚泥は再び水に溶解し崩壊することがない固体とする固化剤を使用した工場排水の処理方法に関するものである。
That is, water in the concentrated sludge is rapidly dehydrated and separated into water and solids, and the solids are converted to stable hydrophobic rich dewatered sludge. Further, the dewatered sludge is dissolved again in water and disintegrated. The present invention relates to a method for treating industrial wastewater using a solidifying agent that does not become solid.
従来、濃縮汚泥中に存する固形物の固化処理法としては、一般にセメント系または石灰系のものを多量に添加し水和反応によって固定する方法が採用されている。 Conventionally, as a solidification treatment method for solids present in concentrated sludge, a method in which a large amount of cement-based or lime-based materials are generally added and fixed by a hydration reaction has been employed.
概ね処理対象物が無機系成分で構成されている場合には、セメント系のものが選択され、有機系成分で構成されている場合には石灰系のものが選択される。 In general, when the object to be treated is composed of an inorganic component, a cement-based one is selected, and when it is composed of an organic component, a lime-based one is selected.
セメント系または石灰系による水分処理は、単なる水分の吸収による自己硬化反応であるので処理対象物中の含水量によって添加量が決められるが、通常３０乃至４０重量部前後必要とすると言われている。 Cement-based or lime-based moisture treatment is a self-curing reaction based on mere moisture absorption, so the amount to be added is determined by the moisture content in the object to be treated, but is usually said to require around 30 to 40 parts by weight. .
濃縮汚泥の脱水に関する従来のもう一つの処理法としては脱水機を使用する場合があるが、かかる場合は、凝集剤（無機系または有機系）の添加量が多量に必要となるばかりか、脱水が困難になるなどの課題がある。
Another conventional treatment method for dewatering concentrated sludge is to use a dehydrator. In such a case, a large amount of flocculant (inorganic or organic) needs to be added. There are problems such as becoming difficult.
本発明は、前記従来の課題に対処すべく創案されたものであって、汚泥中の汚泥水と固形物とを速やかに分離すると共に、固形物を速やかに固化し、１０重量部程度の添加であっても安定した形での固形物固化が達成でき、しかも分離水の浄化をも行え、処理後の固形物の性状を改質して安定した固形物の分離ができる固化剤を使用した工場排水の処理方法を提供することを目的とするものである。
The present invention has been devised to address the above-described conventional problems, and quickly separates sludge water and solids in sludge and solidifies the solids quickly, and adds about 10 parts by weight. However, a solidifying agent that can achieve solid solidification in a stable form and that can also purify the separated water and that can improve the properties of the solid after the treatment and can stably separate the solid is used. It aims at providing the processing method of factory waste water .
本発明による工場排水の処理方法は、
ペーパースラッジが２０乃至６０重量部、可溶性無水石膏が１０乃至４０重量部、硫酸バンドが１０乃至３５重量部、消石灰が４乃至１５重量部、ソーダ灰が５乃至１５重量部、ポルトランドセメントが１乃至１０重量部、中性からアルカリ性を示す汚泥水の分離処理に優れるポリアクリルアミド加水分解物、ポリアクリル酸ソーダ・アミド誘導体の高分子ポリマーが０．５乃至７重量部、チオ硫酸ソーダが１乃至７重量部、硫酸第１鉄が０．５乃至６重量部、シリカが０．３乃至６重量部を含んで配合構成された固化剤を使用した工場排水の処理方法であり、
工場排水の汚泥水中に固形物が２０％〜４０％含まれているとき、前記固形物の２％〜４％の重量の前記配合構成からなる固化剤を投入し、所定時間攪拌して水と固形物に分離し、前固形物を含水率８０％程度の固形物として、手で持てる程度に固めた、
ことを特徴とし、
または、
ペーパースラッジが２０乃至６０重量部、可溶性無水石膏が１０乃至４０重量部、硫酸バンドが１０乃至３５重量部、消石灰が４乃至１５重量部、ソーダ灰が５乃至１５重量部、ポルトランドセメントが１乃至１０重量部、中性からアルカリ性を示す汚泥水の分離処理に優れるポリアクリルアミド加水分解物、ポリアクリル酸ソーダ・アミド誘導体の高分子ポリマーが０．５乃至７重量部、チオ硫酸ソーダが１乃至７重量部、硫酸第１鉄が０．５乃至６重量部、シリカが０．３乃至６重量部を含んで配合構成された固化剤を使用した工場排水の処理方法であり、
工場排水で発生した濁水中に固形物が３％〜５％含まれているとき、前記固形物の０．３％〜０．５％の重量の前記配合構成からなる固化剤を投入し、所定時間攪拌して水と固形物に分離し、前記固形物を含水率８０％程度の固形物として、手で持てる程度に固めた、
ことを特徴とし、
または、
前記のポルトランドセメントは、普通、早強、超早強、中庸熱、耐硫酸塩の各種ポルトランドセメントのいずれかの一種またはいずれかのセメントを選択しての混合である、
ことを特徴とするものである。
The method for treating industrial wastewater according to the present invention is as follows:
20 to 60 parts by weight of paper sludge, 10 to 40 parts by weight of soluble anhydrite, 10 to 35 parts by weight of sulfuric acid band, 4 to 15 parts by weight of slaked lime, 5 to 15 parts by weight of soda ash, and 1 to 1 of Portland cement 10 parts by weight, 0.5 to 7 parts by weight of polyacrylamide hydrolyzate excellent in neutral to alkaline sludge separation treatment, high molecular weight polymer of polyacrylic acid soda / amide derivative, 1 to 7 sodium thiosulfate It is a method for treating industrial wastewater using a solidifying agent comprising a composition comprising 0.5 parts by weight, ferrous sulfate 0.5 to 6 parts by weight, and silica 0.3 to 6 parts by weight ,
When 20% to 40% of solid matter is contained in the sludge water of factory effluent, the solidifying agent consisting of 2% to 4% by weight of the solid matter is added and stirred for a predetermined time with water. Separated into solids, the previous solid was solidified as a solid with a water content of about 80%, so that it could be held by hand
It is characterized by
Or
20 to 60 parts by weight of paper sludge, 10 to 40 parts by weight of soluble anhydrite, 10 to 35 parts by weight of sulfuric acid band, 4 to 15 parts by weight of slaked lime, 5 to 15 parts by weight of soda ash, and 1 to 1 of Portland cement 10 parts by weight, 0.5 to 7 parts by weight of polyacrylamide hydrolyzate excellent in neutral to alkaline sludge separation treatment, high molecular weight polymer of polyacrylic acid soda / amide derivative, 1 to 7 sodium thiosulfate It is a method for treating industrial wastewater using a solidifying agent comprising a composition comprising 0.5 parts by weight, ferrous sulfate 0.5 to 6 parts by weight, and silica 0.3 to 6 parts by weight,
When 3% to 5% of solid matter is contained in turbid water generated from factory wastewater, a solidifying agent comprising the above-described blending composition with a weight of 0.3% to 0.5% of the solid matter is charged, and predetermined Stirred for a period of time to separate into water and solids, and solidified the solids as a solid having a water content of about 80% so that it could be held by hand.
It is characterized by
Or
The Portland cement is usually, early strength, super early strength, moderate heat, mixed with any one kind of various Portland cements of sulfate resistance, or any cement selected.
It is characterized by this.
本発明にかかる工場排水の処理方法によれば、汚泥中の汚泥水と固形物とを速やかに分離できると共に、固形物を速やかに固化し、１０重量部程度の添加であっても安定した形での固形物固化が達成でき、しかも分離水の浄化が図れ、処理後の固形物の性状を改質して安定した固形物の分離ができるとの優れた効果を奏する。
According to the method for treating industrial wastewater according to the present invention, the sludge water and the solid matter in the sludge can be quickly separated, and the solid matter can be quickly solidified to be in a stable form even with addition of about 10 parts by weight. The solids can be solidified at the same time, the purified water can be purified, and the properties of the solids after the treatment can be improved to stably separate the solids.
本発明による固化剤の生成に際しては、まず、ペーパースラッジが２０乃至６０重量部配合される。 In producing the solidifying agent according to the present invention, first, 20 to 60 parts by weight of paper sludge is blended.
このペーパースラッジ(paper sludge)は、例えば、製紙工程で排出される廃棄物であり、セルロースを含む繊維物が主成分であり、最近ではこれを焼却してできる炭化物(PSC)が更なる有効資源として注目されている。 This paper sludge is, for example, waste discharged in the papermaking process, and is mainly composed of fiber containing cellulose. Recently, carbon (PSC) produced by incineration of this is a more effective resource. It is attracting attention as.
そして、炭化させたペーパースラッジ灰(PSC)は、表面が多孔質になっていて、そのため、消臭剤・化学物質吸着材など多岐にわたる用途が期待されており、本発明ではこのペーパースラッジを２０乃至６０重量部配合するものとする。 Carbonized paper sludge ash (PSC) has a porous surface, and therefore is expected to be used in a wide variety of applications such as deodorants and chemical adsorbents. To 60 parts by weight.
次に、無水石膏が１０乃至４０重量部、配合される。無水石膏とは、結晶水を持たない硫酸カルシウムで、可溶性無水石膏（III型無水石膏）と不溶性無水石膏（II型無水石膏）がある。半水石膏を加熱（180℃〜190℃）して得られる可溶性無水石膏は、空気中の水分を吸着して半水石膏に戻る。一方、不溶性無水石膏は天然に存在するが、二水石膏を300℃〜700℃で焼成することでも得られる。不溶性無水石膏は水を加えても容易に水和反応しないが、凝結促進剤を加えて硬化させることができる。本発明では、可溶性無水石膏が用いられるものとなる。 Next, 10 to 40 parts by weight of anhydrous gypsum is blended. Anhydrous gypsum is calcium sulfate without crystal water, and includes soluble anhydrite (type III anhydrite) and insoluble anhydrite (type II anhydrite). Soluble anhydrous gypsum obtained by heating hemihydrate gypsum (180 ° C. to 190 ° C.) adsorbs moisture in the air and returns to hemihydrate gypsum. On the other hand, insoluble anhydrous gypsum exists naturally, but it can also be obtained by baking dihydrate gypsum at 300 ° C to 700 ° C. Insoluble anhydrous gypsum does not readily hydrate when water is added, but can be cured by adding a setting accelerator. In the present invention, it is assumed that the soluble anhydrite is used.
また、硫酸バンドが１０乃至３５重量部、配合される。当該硫酸バンドは、本発明において汚泥水中の浮遊物を沈降させるために用いられる。 Also, 10 to 35 parts by weight of a sulfuric acid band is blended. The sulfuric acid band is used in the present invention to settle suspended matter in sludge water.
次に、消石灰が４乃至１５重量部、配合される。消石灰の原料は石灰石であり、該石灰石は粉砕・焼成・加水(消化)等の工程を経る事で、炭酸カルシウム(炭カル)、生石灰、消石灰と名前を変え、使用方法も変わる。生石灰に加水して消化、熟成させたものが消石灰となる。 Next, 4 to 15 parts by weight of slaked lime is blended. The raw material of slaked lime is limestone, and the limestone is renamed calcium carbonate (charcoal), quick lime, and slaked lime through processes such as pulverization, firing, and hydrolysis (digestion), and the usage method is also changed. What is hydrolyzed and digested and aged into quicklime is slaked lime.
CaO(酸化カルシウム)＋H2O(水)→Ca(OH)2(水酸化カルシウム)
形状は白色の微粉体で、粒径は150μm以下が主体となる。かさ比重は0.4〜0.55程度、難溶解性であるが、スラリーにすると強いアルカリ性を示す。
CaO (calcium oxide) + H 2 O (water) → Ca (OH) 2 (calcium hydroxide)
The shape is white fine powder, and the particle size is mainly 150 μm or less. The bulk specific gravity is about 0.4 to 0.55 and hardly soluble, but when it is made into a slurry, it shows strong alkalinity.
飲料水のpHは5.8〜8.6と規定されている為、原水の酸性度が高い場合に消石灰の強いアルカリ性を利用してpH調整(中和)目的に凝集池や沈殿池に注入される場合がある。但し、消石灰は粉体を溶解する手間がかかりハンドリングの悪さから原水のpH調整用途で使用されている現場は少なくなっている。むしろ赤水防止及び配管内壁に被膜を作る目的で配水池に消石灰を注入する事例が増えている。また、家庭から出た排水は下水処理場で処理されるが、反応槽で微生物により分解された汚泥を凝集沈殿させる際に、消石灰は、他の無機凝集剤等と併せて使用される。又、脱臭・殺菌目的で注入する場合もある。 Since the pH of drinking water is regulated between 5.8 and 8.6, when the raw water has high acidity, it may be injected into coagulation ponds or sedimentation basins for the purpose of pH adjustment (neutralization) using the strong alkalinity of slaked lime. is there. However, slaked lime is troublesome to dissolve the powder, and due to poor handling, the number of sites where it is used for pH adjustment of raw water is decreasing. Rather, there are an increasing number of cases where slaked lime is injected into the reservoir for the purpose of preventing red water and creating a coating on the inner wall of the pipe. In addition, wastewater discharged from households is treated in a sewage treatment plant, but slaked lime is used in combination with other inorganic flocculants and the like when coagulating and sedimenting sludge decomposed by microorganisms in a reaction tank. Moreover, it may inject | pour for the purpose of deodorizing and disinfection.
さらに、ゴミ焼却場等の排ガス中のSOxやHCl除去用途で消石灰が使用されており、またバグフィルターで回収した飛灰から砒素等の不純物が溶出するのを防止する目的で灰加湿器に粉末消石灰を供給する用途もある。ごみ固形燃料(RDF)成型用途では、殺菌作用を利用して微生物による発酵を抑える為に消石灰を混合する。 In addition, slaked lime is used to remove SOx and HCl in exhaust gas from garbage incinerators, and powder in ash humidifiers to prevent arsenic and other impurities from eluting from fly ash collected by bag filters. There is also an application to supply slaked lime. In refuse solid fuel (RDF) molding applications, slaked lime is mixed to suppress fermentation by microorganisms using sterilization.
その他、製糖工場で砂糖を精製する際に、高濃度の砂糖水溶液に消石灰を加え二酸化炭素(CO2)を吹き込み、炭酸カルシウム(CaCO3)を生成し、不純物を吸着して沈殿除去するのに使用されている。この様に、活躍の場面は多岐に渡り、本発明の固化剤においても汚泥水の存する固形物を凝集沈殿させるに際し重要な役目を果たしている。 In addition, when refining sugar in a sugar factory, slaked lime is added to a high-concentration sugar aqueous solution and carbon dioxide (CO 2 ) is blown to produce calcium carbonate (CaCO 3 ), which adsorbs impurities and removes precipitates. It is used. Thus, the scene of an activity is wide-ranging and the solidifying agent of the present invention also plays an important role in agglomerating and precipitating solids containing sludge water.
次に、ソーダ灰が５乃至１５重量部、配合される。ソーダ灰とは炭酸ナトリウムであり、当該ソーダ灰はガラス原料、石けん、洗剤、無機化学向け原料あるいは食品添加物用途など幅広い分野で利用される。本発明では、主に、水処理助剤として使用される。 Next, 5 to 15 parts by weight of soda ash is blended. Soda ash is sodium carbonate, and the soda ash is used in a wide range of fields including glass raw materials, soaps, detergents, raw materials for inorganic chemistry, and food additives. In the present invention, it is mainly used as a water treatment aid.
また、ポルトランドセメントが１乃至１０重量部、配合される。 Further, 1 to 10 parts by weight of Portland cement is blended.
一般に「セメント」とは「ポルトランドセメント」を指標し、特に普通ポルトランドセメントを指している。これは、普通ポルトランドセメントの用途範囲が非常に広く、「オールラウンドなセメント」と指標されるからである。 In general, “cement” refers to “Portland cement”, and particularly ordinary Portland cement. This is because ordinary Portland cement has a very wide application range and is indicated as “all-round cement”.
しかしながら、本発明においてポルトランドセメントには、普通、早強、超早強、中庸熱、耐硫酸塩の各種ポルトランドセメントのいずれかの一種またはいずれかのセメントを選択して混合されたものを指標する。 However, in the present invention, the portland cement is usually, early strength, ultra-early strength, moderate heat, sulfate-resistant, or any one of the various portland cements selected or mixed. .
次に、高分子ポリマーが０．５乃至７重量部、配合される。高分子ポリマーは、少ない使用量であっても優れた凝集効果を発揮する。またＰＨ値により効果の変化があり、中性からアルカリ性を示す汚泥水の分離処理に優れている。 Next, 0.5 to 7 parts by weight of the high molecular weight polymer is blended. The high molecular polymer exhibits an excellent aggregation effect even with a small amount of use. In addition, the effect varies depending on the PH value, and it is excellent in the separation treatment of sludge water exhibiting neutral to alkaline.
高分子ポリマーとしては、ポリアクリルアミド加水分解物、ポリアクリル酸ソーダ・アミド誘導体などが挙げられる。 Examples of the polymer include polyacrylamide hydrolyzate and polyacrylic acid soda / amide derivative.
次に、チオ硫酸ソーダが１乃至７重量部、配合される。チオ硫酸ソーダとは別名チオ硫酸ナトリウムとも称され、水処理助剤として使用される。 Next, 1 to 7 parts by weight of sodium thiosulfate is blended. Sodium thiosulfate is also called sodium thiosulfate and is used as a water treatment aid.
次に、硫酸第１鉄が０．５乃至６重量部、配合される。硫酸第一鉄は、酸化第二鉄・紺青等の顔料・屎尿処理・産業廃水(ヘドロ等)の中和・凝集沈降剤・土壌改良剤などの多用途に対応する。脱硫及び脱臭効果に関し、本品は硫化水素・アンモニアを同時吸着する効果が優れており、屎尿並びに下水処理・鶏糞乾燥時の脱臭、魚腸骨処理工場の脱臭等と悪臭公害防止に最適とおいわれている。本発明において沈殿促進剤として機能する。 Next, 0.5 to 6 parts by weight of ferrous sulfate is added. Ferrous sulfate can be used for various purposes such as pigments such as ferric oxide and bitumen, treatment of human waste, neutralization of industrial wastewater (such as sludge), coagulating sedimentation agent, and soil conditioner. With regard to desulfurization and deodorization effects, this product is excellent in the effect of simultaneous adsorption of hydrogen sulfide and ammonia, and is said to be optimal for prevention of bad odor pollution such as deodorization during manure and sewage treatment / drying of chicken manure, deodorization in fish iliac treatment plant, etc. ing. In the present invention, it functions as a precipitation accelerator.
次に、シリカが０．３乃至６重量部を含んで配合される。クロロシラン類・珪酸ナトリウムなどから生産される二酸化珪素(SiO2)である。本発明において水処理助剤として使用される。 Next, silica is blended containing 0.3 to 6 parts by weight. Silicon dioxide (SiO2) produced from chlorosilanes and sodium silicate. In the present invention, it is used as a water treatment aid.
次に、図を参照して本発明の実施例を説明する。 Next, embodiments of the present invention will be described with reference to the drawings.
本実施例では、ペーパースラッジを５０ｇ、無水石膏を２０ｇ、硫酸バンドを１６ｇ、消石灰を６ｇ、ソーダ灰を６ｇ、ポルトランドセメントを８ｇ、高分子ポリマーを４ｇ、チオ硫酸ソーダを４ｇ、硫酸第１鉄を４ｇ、シリカを４ｇ配合し、本発明による固化剤１２２ｇを生成した。 In this example, 50 g of paper sludge, 20 g of anhydrous gypsum, 16 g of sulfate band, 6 g of slaked lime, 6 g of soda ash, 8 g of Portland cement, 4 g of high molecular polymer, 4 g of sodium thiosulfate, ferrous sulfate 4 g and 4 g of silica were blended to produce 122 g of a solidifying agent according to the present invention.
そして、当該固化剤を例えば工場排水などの汚泥水について、水と固形物との分離に使用した。例えば、前記汚泥水中に泥などの固形物が２０％〜４０％程度含まれているとき、本固化剤をその固形物の１割程度、すなわち２％〜４％の固化剤を投入する。そして、所定時間攪拌すると、水と固形物に分離した。該固形物は含水率８０％程度の固形物であり、充分に手で持てる程度に固まる。 And the said solidification agent was used for isolation | separation of water and solid substance about sludge water, such as a factory waste water, for example. For example, when about 20% to 40% of solid matter such as mud is contained in the sludge water, about 10% of the solidifying agent, that is, 2% to 4% of solidifying agent is added. And when it stirred for the predetermined time, it isolate | separated into water and a solid substance. The solid matter is a solid matter having a water content of about 80%, and is solidified enough to be held by hand.
次に、工場排水などで発生する濁水について本発明による固化剤を投入した。濁水中には約３％〜５％程度の固形物が混入しているので、その１割程度の固化剤、すなわち約０．３％〜０．５％程度の本固化剤を投入し、攪拌した。 Next, the solidifying agent according to the present invention was added to muddy water generated from factory wastewater. About 3% to 5% of solid matter is mixed in the muddy water. About 10% of the solidifying agent, that is, about 0.3% to 0.5% of the solidifying agent is added and stirred. did.
すると、速やかに水と固形物に分離した。そして、この固形物は含水率約８０％程度の固形物となり、充分手に持てる程度に固まった。
Then, it quickly separated into water and solid matter. And this solid substance became a solid substance with a water content of about 80%, and it hardened to such an extent that it could be sufficiently held.
Claims (3)
工場排水の汚泥水中に固形物が２０％〜４０％含まれているとき、前記固形物の２％〜４％の重量の前記配合構成からなる固化剤を投入し、所定時間攪拌して水と固形物に分離し、前固形物を含水率８０％程度の固形物として、手で持てる程度に固めた、
ことを特徴とする工場排水の処理方法。
20 to 60 parts by weight of paper sludge, 10 to 40 parts by weight of soluble anhydrite, 10 to 35 parts by weight of sulfuric acid band, 4 to 15 parts by weight of slaked lime, 5 to 15 parts by weight of soda ash, and 1 to 1 of Portland cement 10 parts by weight, 0.5 to 7 parts by weight of polyacrylamide hydrolyzate excellent in neutral to alkaline sludge separation treatment, high molecular weight polymer of polyacrylic acid soda / amide derivative, 1 to 7 sodium thiosulfate It is a method for treating industrial wastewater using a solidifying agent comprising a composition comprising 0.5 parts by weight, ferrous sulfate 0.5 to 6 parts by weight, and silica 0.3 to 6 parts by weight ,
When 20% to 40% of solid matter is contained in the sludge water of factory effluent, the solidifying agent consisting of 2% to 4% by weight of the solid matter is added and stirred for a predetermined time with water. Separated into solids, the previous solid was solidified as a solid with a water content of about 80%, so that it could be held by hand
A method for treating industrial wastewater.
工場排水で発生した濁水中に固形物が３％〜５％含まれているとき、前記固形物の０．３％〜０．５％の重量の前記配合構成からなる固化剤を投入し、所定時間攪拌して水と固形物に分離し、前記固形物を含水率８０％程度の固形物として、手で持てる程度に固めた、 When 3% to 5% of solid matter is contained in turbid water generated from factory wastewater, a solidifying agent comprising the above-described blending composition with a weight of 0.3% to 0.5% of the solid matter is charged, and predetermined Stirred for a period of time to separate into water and solids, and solidified the solids as a solid having a water content of about 80% so that it could be held by hand.
ことを特徴とする工場排水の処理方法。A method for treating industrial wastewater.
ことを特徴とする請求項１または請求項２記載の工場排水の処理方法。 The Portland cement is usually, early strength, super early strength, moderate heat, mixed with any one kind of various Portland cements of sulfate resistance, or any cement selected.
The method for treating industrial waste water according to claim 1 or claim 2, wherein
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