JP3378700B2 - Granular phosphorus adsorbent using tap water sludge and its production method - Google Patents
Granular phosphorus adsorbent using tap water sludge and its production methodInfo
- Publication number
- JP3378700B2 JP3378700B2 JP18503795A JP18503795A JP3378700B2 JP 3378700 B2 JP3378700 B2 JP 3378700B2 JP 18503795 A JP18503795 A JP 18503795A JP 18503795 A JP18503795 A JP 18503795A JP 3378700 B2 JP3378700 B2 JP 3378700B2
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- JP
- Japan
- Prior art keywords
- phosphorus
- granular
- water
- cement
- phosphorus adsorbent
- 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 - Fee Related
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Landscapes
- Water Treatment By Sorption (AREA)
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Biological Depolymerization Polymers (AREA)
- Treatment Of Sludge (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、河川などの自然環境水
域から富栄養化物質であるリンを除去するのに適した粒
状リン吸着剤（脱リン剤ともいう。）に関し、該粒状リ
ン吸着剤を全国の上水場から廃棄物として発生する上水
汚泥から製造する新技術に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a granular phosphorus adsorbent (also referred to as a dephosphorization agent) suitable for removing phosphorus, which is a eutrophication substance, from a natural environment body such as a river. The present invention relates to a new technology for producing chemicals from tap water sludge generated as waste from tap water plants nationwide.
【０００２】[0002]
【従来技術】河川及び河川が流入する湖沼、ダム湖、海
等の富栄養化を防止するために、河川水中に含まれるリ
ンを除去する必要性が大きくなっている。例えば、富栄
養化に伴う現象の典型として、アオコ、赤潮の発生があ
るが、このような現象は、０．０５ｍｇ／リットル以上
のリン濃度で非常に起き易いといわれている。このため
河川に含まれるリンを除去する試みが近年始められてい
る。従来、河川の水からリンを除去する方法は、凝集沈
殿装置を陸上に設置し、河川の水をポンプアップし硫酸
アルミニウムなどの凝集剤を添加してリンを凝集させた
後、生成フロックを沈殿分離する方法が知られている。
しかし、この方法は化学プラント的な凝集沈殿装置、ポ
ンプ、配管、大きなポンプ動力等が必要であり設備費、
動力費が高価であるほか、装置を設置する広いスペース
が陸上に必要であるという欠点があった。また凝集沈殿
処理にともなって発生する難脱水性汚泥の処理処分が必
要であるという欠点もあった。2. Description of the Related Art In order to prevent eutrophication of rivers and lakes, dam lakes, seas, etc. into which rivers flow, it is increasingly necessary to remove phosphorus contained in river water. For example, a typical example of a phenomenon associated with eutrophication is the occurrence of blue-green algae and red tide, and it is said that such a phenomenon is very likely to occur at a phosphorus concentration of 0.05 mg / liter or more. Therefore, attempts to remove phosphorus contained in rivers have recently been started. Conventionally, the method of removing phosphorus from river water is to install a flocculation-precipitation device on land, pump up the river water, add a flocculant such as aluminum sulfate to flocculate phosphorus, and then precipitate the generated flocs. Methods of separating are known.
However, this method requires a coagulation-sedimentation device such as a chemical plant, a pump, piping, large pump power, etc.
In addition to the high power cost, there is a drawback that a large space for installing the device is required on land. There is also a drawback that it is necessary to dispose of the hardly dehydratable sludge generated by the coagulation sedimentation treatment.
【０００３】他の方法として、従来から鹿沼土、アロフ
ェン、水酸化アルミニウム、活性アルミナ、水酸化鉄な
どのリン吸着力の大きな物質が知られており、これらの
中、活性アルミナ、鹿沼土やアロフェン等を粒径数セン
チメートルの粒状に焼成し、成型した粒状リン吸着剤を
用いて河川水中のリンを除去しようとの試みも行われて
いる。しかしこれらの粒状リン吸着剤には、以下のよう
な欠点があり、これらの吸着剤を利用したリン除去技術
は実用化されていないのが実状で、さらに理想的な粒状
リン吸着剤の開発が望まれている。すなわち、
活性アルミナは、それ自体高価な活性アルミナ粉末を
粒状に焼成し、成型するために価格がさらに高くなり、
低ランニングコストを必須とする水処理には実用的でな
い場合が多い。
リン吸着量が飽和に達した時、活性アルミナは、その
再生が煩雑で処理コストが高価につく。
粒状リン吸着剤を河川に充填する場合、濁質による閉
塞を防ぐため、活性アルミナ、鹿沼土はいずれも粒径数
センチメートルの大粒径にする必要があるが、こうする
と粒状物が多孔性でないため燐酸イオンの粒内拡散が悪
く、粒状物の内部がリン吸着に利用できない。
鹿沼土の造粒物はリン吸着容量が少なく、短期間にリ
ン吸着力を失う。
鹿沼土の造粒焼成に使用している製造設備は、工程的
にも生産性上も効率が悪く、造粒焼成コストがかなり高
価である。
活性アルミナ及び鹿沼土の造粒物は極めて固く、使用
後の廃物を林地に散布して肥料化する場合自然崩壊性が
遅く、適性が良くない。等である。As other methods, substances having a large phosphorus adsorption force such as Kanuma soil, allophane, aluminum hydroxide, activated alumina, and iron hydroxide have been conventionally known. Among them, activated alumina, Kanuma soil and allophane are known. Attempts have also been made to remove phosphorus in river water using a granular granular phosphorus adsorbent that is obtained by firing the above into a granular form having a particle size of several centimeters. However, these granular phosphorus adsorbents have the following drawbacks, and the reality is that the phosphorus removal technology using these adsorbents has not been put into practical use. Is desired. In other words, activated alumina has a higher price because it is made by firing activated alumina powder, which is expensive in itself, into granules and molding it.
Often impractical for water treatment, which requires low running costs. When the amount of adsorbed phosphorus reaches saturation, activated alumina is complicated to regenerate and the treatment cost is high. When filling a river with a granular phosphorus adsorbent, both activated alumina and Kanuma soil must have a large particle size of several centimeters in order to prevent blockage due to turbidity. Therefore, the diffusion of phosphate ions into the grain is poor, and the inside of the grain cannot be used for phosphorus adsorption. Granules of Kanuma soil have low phosphorus adsorption capacity and lose phosphorus adsorption power in a short period of time. The manufacturing equipment used for granulating and firing Kanuma soil is inefficient in terms of both process and productivity, and the granulating and firing cost is considerably high. Granules of activated alumina and Kanuma soil are extremely hard, and when used waste is sprinkled on forest land to be used as a fertilizer, its natural disintegration is slow and its suitability is poor. Etc.
【０００４】[0004]
【発明が解決しようとする課題】本発明は、前記従来の
粒状リン吸着剤の有する欠点を解消することを課題とす
るものであり、具体的には以下のような事項が解決しよ
うとする課題である。すなわち、
(i) 廃棄物を有効利用して粒状リン吸着剤を製造する
新技術の確立。
(ii) 粒状リン吸着剤の製造が非常に簡単であること。
(iii) 造粒物の焼成工程が不要で、工程が短いこと。
(iv) 粒状リン吸着剤のリン吸着速度が速く、リン吸着
量が多いこと。
(v) 粒状リン吸着剤が多孔性で透水性が良く、粒径を
１ｃｍ以上の大型の粒状物としても内部まで吸着に利用
でき、リン吸着能力が大きいこと。
(vi) 廃リン吸着剤が固すぎず、自然崩壊性が良好で、
処分が容易であること。
(vii) リン吸着剤が低価格で水処理用に適しているこ
と。
等の長所を有する粒状リン吸着剤を開発することが望ま
れている。本発明は、前記のような特徴（長所）を有す
る理想的な粒状リン吸着剤を提供することを課題とする
ものである。SUMMARY OF THE INVENTION The present invention is intended to solve the drawbacks of the above-mentioned conventional granular phosphorus adsorbents. Specifically, the following matters are intended to be solved. Is. That is, (i) establishment of a new technology for producing granular phosphorus adsorbents by effectively utilizing waste. (ii) The production of the granular phosphorus adsorbent is very simple. (iii) The firing process of the granulated product is unnecessary and the process is short. (iv) The granular phosphorus adsorbent has a high phosphorus adsorption rate and a large phosphorus adsorption amount. (v) The granular phosphorus adsorbent is porous and has good water permeability, and even large particles with a particle size of 1 cm or more can be used for adsorption up to the inside, and the phosphorus adsorption capacity is large. (vi) The waste phosphorus adsorbent is not too hard and has good natural disintegration property,
Easy to dispose. (vii) The phosphorus adsorbent is inexpensive and suitable for water treatment. It is desired to develop a granular phosphorus adsorbent having advantages such as the following. An object of the present invention is to provide an ideal granular phosphorus adsorbent having the above characteristics (advantages).
【０００５】[0005]
【課題を解決するための手段】本発明の前記課題は、下
記の本発明のリン吸着剤とその製造方法によって達成さ
れる。すなわち、
（１）上水汚泥、セメント及び高吸水性高分子を混練・
造粒したことを特徴とする粒状リン吸着剤。
（２）高含水状態の上水汚泥にセメント及び高吸水性高
分子粉末を添加し、混練・成型することを特徴とする粒
状リン吸着剤の製造法である。The above object of the present invention can be achieved by the following phosphorus adsorbent of the present invention and a method for producing the same. That is, (1) Kneading water sludge, cement and super absorbent polymer
A granular phosphorus adsorbent characterized by being granulated. (2) A method for producing a granular phosphorus adsorbent, which comprises adding cement and superabsorbent polymer powder to high water content sludge and kneading and molding.
【０００６】上水汚泥は、河川水、湖沼水等の原水に、
凝集剤としてＰＡＣ（ポリ塩化アルミニウム）、硫酸バ
ンド等のアルミニウム塩を添加し、生成フロックを沈殿
分離した沈殿汚泥であり、上水汚泥中には水酸化アルミ
ニウムが比較的多量に含有されている。上水汚泥を園芸
土に利用すると植物のリン欠乏症を招くことが知られて
いる。本発明者はこの現象に着目し、廃棄物として処分
されていた上水汚泥を有効利用してリン吸着剤を製造す
ることができれば、従来の問題点を効果的に解決できる
という認識に達した。[0006] Tap water sludge is used for raw water such as river water and lake water.
It is a settling sludge obtained by adding aluminum salts such as PAC (polyaluminum chloride) and a sulfuric acid band as a coagulant, and separating and separating the produced flocs. The clean water sludge contains a relatively large amount of aluminum hydroxide. It is known that the use of tap water sludge in horticultural soil causes phosphorus deficiency in plants. The present inventor has focused on this phenomenon, and has reached the recognition that if the phosphorus adsorbent can be produced by effectively utilizing the tap water sludge that has been disposed of as waste, the conventional problems can be effectively solved. .
【０００７】本発明者が実施したところによれば、上水
汚泥とセメントを混練すると石のように固い非多孔性の
造粒物が生成してしまい、リン吸着性が著しく悪く、自
然崩壊性も悪いものしか形成されない。しかし、上水汚
泥にセメント及び高吸水性高分子粉末を添加して混練す
ると驚くべきことに造粒物が著しく多孔性の粒状団塊に
なり、しかも適当な強度をもつ弾性粒状体が形成される
ことをみいだした。その弾性を有する多孔性の粒状団塊
の構造は、菓子の「おこし」のように無数の小粒子が、
水を吸収した高吸水性高分子ゲルを媒介として集合し、
多孔性の粒状団塊を形成していた。図１にその外観図を
示す。According to the practice of the inventor of the present invention, when the tap water sludge and the cement are kneaded, a non-porous granule that is hard like stone is produced, and the phosphorus adsorption property is remarkably poor and the natural disintegration property is caused. Only bad things are formed. However, when cement and superabsorbent polymer powder are added to the water sludge and kneaded, surprisingly, the granules become remarkably porous granular agglomerates and elastic granules with appropriate strength are formed. I found a thing. The structure of the porous granular nodule with its elasticity is that countless small particles like the "okoshi" of confectionery,
Assembled through a super absorbent polymer gel that absorbed water,
It formed porous granular nodules. The external view is shown in FIG.
【０００８】また、本発明者が観察したところによれ
ば、上水汚泥とセメントを混練する際に高吸水性高分子
粉末を添加しない場合には、上水汚泥を脱水・乾燥して
乾燥粉末状にしておかないと、セメントの硬化反応が起
きない。従って高吸水性高分子粉末を使用しないで上水
汚泥とセメントを用いて本発明におけると同様な粒状団
塊を形成しようとすれば、少なくとも上水汚泥の乾燥工
程が必要となり、そのためのコストは高額なものにな
る。高吸水性高分子粉末を使用した本発明の場合には、
上水汚泥が高含水のスラリのままでも容易に造粒固化で
き、乾燥が不必要であるという重要な利点が生じること
が認められた。According to the observation of the inventor of the present invention, when the superabsorbent polymer powder is not added when kneading the tap water sludge and the cement, the tap water sludge is dehydrated and dried to obtain a dry powder. If it is not in the shape, the hardening reaction of cement does not occur. Therefore, if it is attempted to form a granular agglomerate similar to that of the present invention by using the tap water sludge and cement without using the super absorbent polymer powder, at least a drying step of the tap water sludge is required, and the cost therefor is high. It becomes something. In the case of the present invention using a super absorbent polymer powder,
It was found that the water sludge can be easily granulated and solidified even when it is a slurry with a high water content, and an important advantage is that drying is unnecessary.
【０００９】本発明に用いる高吸水性高分子としては、
紙おむつ等に多用されている種々の高吸水性高分子（ポ
リアクリル酸塩、澱粉−アクリル酸塩グラフトポリマ
ー、酢酸ビニル共重合体、ポリビニルアルコール系等）
を利用できるが、特に吸水量が大きいものが好ましい。
本発明において高吸水性高分子は、粉末として添加する
ことが便利であるが、要するに本発明のリン吸着剤中に
含まれる微粒子（下記上水汚泥を構成している微粒子や
セメント粒子等）をバインダーとして連結するのに好適
に作用するものであれば特に制限されない。また、セメ
ントとしては、ポルトランドセメント、アルミナセメン
ト等コンクリート製造用の一般的なセメントを利用でき
るが、特にアルミナセメント等の早強性セメント、超早
強性セメントが好適である。As the super absorbent polymer used in the present invention,
Various super absorbent polymers that are often used in disposable diapers (polyacrylate, starch-acrylate graft polymer, vinyl acetate copolymer, polyvinyl alcohol, etc.)
Although it is possible to use the above, it is particularly preferable that the water absorption is large.
In the present invention, the superabsorbent polymer is convenient to add as a powder, but in short, the fine particles contained in the phosphorus adsorbent of the present invention (fine particles or cement particles constituting the following water sludge) The binder is not particularly limited as long as it works suitably for coupling. Further, as the cement, general cement for producing concrete such as Portland cement and alumina cement can be used, but particularly early-strength cement such as alumina cement and ultra-early-strength cement are preferable.
【００１０】本発明の粒状脱リン剤（リン吸着剤）の代
表的製造例を図２に基づいて説明する。上水場の凝集沈
殿池の沈殿汚泥をシックナーで濃縮した上水汚泥（水分
９４〜９５％程度）にセメントを添加し混合した後、高
吸水性高分子粉末を添加すると、高吸水性高分子粉末が
上水汚泥に含まれる水分を速やかに吸収し、膨潤する。
この状態で混合物を数分間混練すると、水を吸収して膨
潤した高吸水性高分子粉末が粘着力を帯びバインダーと
なって上水汚泥を構成している微粒子やセメント粒子を
連結し、粒状団塊を形成する。これを例えば押し出し造
粒法によって適当な粒径、形状に成型すれば、多孔性の
粒状脱リン剤ができる。これを数時間以上大気中に放置
すれば高吸水性高分子粒子ゲルの硬化現象によって強度
が増加し、水中に漬けても崩壊しない脱リン剤が製造さ
れる。従来必要であった乾燥工程、焼成工程を設けるこ
となく極めて簡単な工程で、短時間で多孔性の弾性のあ
る粒状脱リン剤が製造できる。A typical production example of the granular dephosphorization agent (phosphorus adsorbent) of the present invention will be described with reference to FIG. When cement is added to and mixed with tap water sludge (water content of about 94 to 95%) obtained by concentrating the sludge from the coagulation sedimentation basin of a tap water field with a thickener, a super absorbent polymer powder is added. The powder quickly absorbs the water contained in the drinking water sludge and swells.
When the mixture is kneaded for a few minutes in this state, the superabsorbent polymer powder that has swollen by absorbing water has an adhesive force and acts as a binder to connect the fine particles and cement particles that constitute the water sludge to form a granular agglomerate. To form. A porous granular dephosphorizing agent can be obtained by molding this into an appropriate particle size and shape by, for example, an extrusion granulation method. If this is left in the air for several hours or more, the strength of the superabsorbent polymer particle gel increases due to the hardening phenomenon, and a dephosphorizing agent that does not collapse even when immersed in water is produced. It is possible to produce a porous and elastic granular dephosphorizing agent in a short time by an extremely simple process without providing a drying process and a firing process which have been conventionally required.
【００１１】なお、セメントは一種のアルカリ剤である
ため、前記の方法によって製造した粒状脱リン剤をリン
含有水に接触させると、脱リン剤から当初アルカリ成分
（ＣａＯ等）が溶出し脱リン処理水のｐＨが９以上に上
昇することがあり、河川、湖沼からリン除去を行う場合
に生態系に悪影響を与える恐れがある。このような問題
を防止するには、水酸化鉄スラリ、水酸化アルミスラリ
に酸を添加し、スラリのｐＨを酸性（ｐＨ４〜５程度）
にしておき、該酸性のスラリにセメントを添加し、セメ
ントのアルカリ分を酸性のスラリで中和するようにすれ
ば、中性のスラリセメント混合物に高吸水性高分子粉末
を添加・混合することになり、かくして作られた脱リン
剤からアルカリ成分が溶出することはなく解決される。Since cement is a kind of alkaline agent, when the granular dephosphorizing agent produced by the above method is brought into contact with phosphorus-containing water, the alkaline component (CaO etc.) is initially eluted from the dephosphorizing agent and dephosphorized. The pH of treated water may rise to 9 or higher, which may adversely affect the ecosystem when phosphorus is removed from rivers and lakes. To prevent such problems, add acid to iron hydroxide slurry or aluminum hydroxide slurry to adjust the pH of the slurry to acidic (pH 4-5).
Then, by adding cement to the acidic slurry and neutralizing the alkali content of the cement with the acidic slurry, adding and mixing the superabsorbent polymer powder to the neutral slurry cement mixture. The alkaline component does not elute from the dephosphorizing agent thus produced, and the solution is solved.
【００１２】本発明の粒状脱リン剤を用いてリン含有水
からリンを除去するには粒状脱リン剤をカラムに充填
し、リン含有水を適切な空間速度（ＳＶ）で通水すれば
良い。また、河川からリン除去を行うには粒状数センチ
に造粒した脱リン剤をネットからなる袋等透水性容器に
詰め、これを河川に水没させる方法が河川の濁質による
目詰まりが少なく、最も簡便なリン除去技術として推薦
できる。In order to remove phosphorus from the phosphorus-containing water using the granular dephosphorizing agent of the present invention, the granular dephosphorizing agent may be packed in a column and the phosphorus-containing water may be passed through at an appropriate space velocity (SV). . Also, in order to remove phosphorus from a river, a method of packing a dephosphorizing agent granulated into a few centimeters of granularity in a water-permeable container such as a bag made of a net and submerging this in a river causes less clogging due to turbidity in the river, It can be recommended as the simplest phosphorus removal technology.
【００１３】なお、本発明者の先願（特開平６−１５４
５９７号公報）である「金属水酸化物と高吸水性高分子
の複合粒状物」は、高吸水性高分子を利用するものであ
るが、高吸水性高分子の作用が本発明とは本質的に異な
るものである。すなわち、先願発明の技術は、「高吸水
性高分子よりなり、水中で膨潤して弾性を示すヒドロゲ
ル粒子の各々の内部に金属水酸化物を保持させるもの」
であるのに対し、本発明は、高吸水性高分子ゲル粒子の
外部にリン吸着性微粒子が存在する。また、先願発明の
技術は、ヒドロゲルは一つ一つ分散させた状態で、小粒
径のリン吸着剤として利用するものであり、大粒径の脱
リン剤は製造できない。すなわち、本発明者の先願の
「金属水酸化物と高吸水性高分子の複合粒状物」は、本
発明のような集合団粒の構造をとっていない。The prior application of the present inventor (Japanese Patent Laid-Open No. 6-154)
597), "Composite Granules of Metal Hydroxide and Super Absorbent Polymer" utilizes a superabsorbent polymer, but the action of the superabsorbent polymer is essential to the present invention. Are different. That is, the technology of the invention of the prior application is that "a metal hydroxide is held inside each of the hydrogel particles which are made of a superabsorbent polymer and swell in water and exhibit elasticity."
On the other hand, in the present invention, the phosphorus-adsorptive fine particles are present outside the superabsorbent polymer gel particles. In addition, the technique of the invention of the prior application utilizes each hydrogel as a phosphorus adsorbent having a small particle size in a dispersed state, and cannot produce a dephosphorizing agent having a large particle size. In other words, the “composite granular material of metal hydroxide and superabsorbent polymer” of the present inventor's prior application does not have the structure of aggregated particles as in the present invention.
【００１４】[0014]
【実施例】以下に実施例により本発明を具体的に説明す
る。ただし、本発明はこの実施例のみに限定されるもの
ではない。
実施例１
上水汚泥スラリ（ｐＨ６．８、水分９５％、アルミニウ
ム含有率１２０ｇ／ｋｇ乾燥固形物）に硫酸を添加し、
ｐＨ５に調整した後、スラリ５００ｃｃに対し早強性の
アルミナセメント６０ｇを添加・混合し、高吸水性高分
子粉末７０ｇを添加し、３分間混練したところ、スラリ
水分が急速に高吸水性高分子粉末に吸収され、水分が減
少した上水汚泥微粒子が水を吸収した高吸水性高分子粉
末をバインダーとして多孔性の粒状団塊に集合した。こ
れを粒径８〜１２ｍｍに成型し、６時間風乾したとこ
ろ、セメントの硬化作用によって強度が増加し、弾性の
ある適度な強度（手で強く握ると壊すことができる。）
の多孔性脱リン剤が製造された。EXAMPLES The present invention will be specifically described below with reference to examples. However, the present invention is not limited to this embodiment. Example 1 Sulfuric acid was added to tap water sludge slurry (pH 6.8, water content 95%, aluminum content 120 g / kg dry solid),
After adjusting to pH 5, 60 g of early-strength alumina cement was added to and mixed with 500 cc of slurry, 70 g of superabsorbent polymer powder was added, and the mixture was kneaded for 3 minutes. The superabsorbent polymer powder, which had been absorbed by the powder and whose water content had been reduced, absorbed the water, was used as a binder to assemble into a porous granular agglomerate. When this was molded into a particle size of 8 to 12 mm and air-dried for 6 hours, the strength increased due to the hardening effect of cement, and it was moderately elastic (it can be broken by grasping it strongly with the hands).
Porous dephosphorizing agent was produced.
【００１５】実施例２
実施例１で製造した多孔性脱リン剤を用いてダム流入河
川のリン除去を想定したリン除去リン除去カラム試験を
行った。試験条件と試験結果を第１表に示す。Example 2 Using the porous dephosphorizing agent produced in Example 1, a phosphorus-removing phosphorus-removing column test was conducted on the assumption of phosphorus removal in a dam inflowing river. Table 1 shows the test conditions and the test results.
【００１６】[0016]
【表１】 [Table 1]
【００１７】第１表から、本発明の上水汚泥を原料とし
たリン吸着剤は良好な脱リン性能を示していることが認
められる。なお、原水のｐＨが７．２であるのに対し
て、処理水のｐＨはいずれも７．４〜８．３の範囲にあ
り水質規制を満足した。It can be seen from Table 1 that the phosphorus adsorbent of the present invention, which uses the raw water sludge as a raw material, exhibits good dephosphorization performance. The pH of the raw water was 7.2, whereas the pH of the treated water was in the range of 7.4 to 8.3, which satisfied the water quality regulation.
【００１８】[0018]
【発明の効果】本発明によれば、
（１）従来廃棄処分していた上水汚泥から、乾燥・焼成
することなく（すなわち、上水汚泥の脱水、乾燥及び造
粒物の乾燥・焼成が不要ということ）、極めて簡単にか
つ短時間で、多孔性で適当な強度を有する粒状リン吸着
剤を製造することができる。従って、大量生産に適して
おり、製造設備費、ランニングコストを共に従来より著
しく削減することができる。
（２）リン吸着剤として有効利用する量に応じて、上水
汚泥の廃棄処分量が減少する。
（３）多孔性であるため、大粒径であっても、表面積が
大きくリンの吸着性能が優れている。
（４）強度が適当であり、崩壊性が優れているので、廃
吸着剤の森林への散布などの処分が容易である。EFFECTS OF THE INVENTION According to the present invention, (1) the tap water sludge that has been conventionally disposed of is not dried and fired (that is, dehydration of the tap water sludge, drying, and drying and firing of the granulated product are performed. That is, it is unnecessary), and it is possible to manufacture a granular phosphorus adsorbent having a proper strength and being porous in a very simple and short time. Therefore, it is suitable for mass production, and both the manufacturing equipment cost and the running cost can be significantly reduced as compared with the conventional one. (2) The amount of wastewater sludge to be disposed of is reduced according to the amount of phosphorus adsorbent that is effectively used. (3) Since it is porous, it has a large surface area and excellent phosphorus adsorption performance even with a large particle size. (4) Since the strength is appropriate and the disintegration is excellent, it is easy to dispose of the waste adsorbent on the forest.
【図１】本発明の団粒構造の粒状リン吸着剤の模式図を
示す。FIG. 1 shows a schematic diagram of a granular phosphorus adsorbent having an aggregate structure according to the present invention.
【図２】本発明のリン吸着剤の製造工程を示すフロー説
明図である。FIG. 2 is a flow explanatory view showing a production process of the phosphorus adsorbent of the present invention.
１ 本発明の粒状リン吸着剤 ２ 多孔性の粒状団塊 ３ リン吸着性微粒子 1 Granular phosphorus adsorbent of the present invention 2 porous granular nodules 3 Phosphorus adsorptive fine particles
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) C02F 1/28 C02F 11/00 - 11/20 B01J 20/00 - 20/34 ─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. 7 , DB name) C02F 1/28 C02F 11/00-11/20 B01J 20/00-20/34
Claims (2)
を混練・造粒したことを特徴とする粒状リン吸着剤。1. A granular phosphorus adsorbent characterized by kneading and granulating clean water sludge, cement and super absorbent polymer.
吸水性高分子粉末を添加し、混練・成型することを特徴
とする粒状リン吸着剤の製造法。2. A method for producing a granular phosphorus adsorbent, which comprises adding cement and superabsorbent polymer powder to high water content sludge and kneading and molding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18503795A JP3378700B2 (en) | 1995-06-29 | 1995-06-29 | Granular phosphorus adsorbent using tap water sludge and its production method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18503795A JP3378700B2 (en) | 1995-06-29 | 1995-06-29 | Granular phosphorus adsorbent using tap water sludge and its production method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0910762A JPH0910762A (en) | 1997-01-14 |
| JP3378700B2 true JP3378700B2 (en) | 2003-02-17 |
Family
ID=16163691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18503795A Expired - Fee Related JP3378700B2 (en) | 1995-06-29 | 1995-06-29 | Granular phosphorus adsorbent using tap water sludge and its production method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3378700B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100418100B1 (en) * | 2001-09-15 | 2004-02-11 | 강용성 | The absorber manufacturing method |
| RU2506229C2 (en) * | 2008-04-16 | 2014-02-10 | Уильям ЛУКАС | System and method of bioretention |
-
1995
- 1995-06-29 JP JP18503795A patent/JP3378700B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0910762A (en) | 1997-01-14 |
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