JP2024062310A - Manufacturing method of inorganic flocculant - Google Patents
Manufacturing method of inorganic flocculant Download PDFInfo
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- JP2024062310A JP2024062310A JP2022180625A JP2022180625A JP2024062310A JP 2024062310 A JP2024062310 A JP 2024062310A JP 2022180625 A JP2022180625 A JP 2022180625A JP 2022180625 A JP2022180625 A JP 2022180625A JP 2024062310 A JP2024062310 A JP 2024062310A
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- wastewater
- treatment agent
- wastewater treatment
- aluminum sulfate
- components
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- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 28
- 238000004065 wastewater treatment Methods 0.000 claims abstract description 20
- 239000002351 wastewater Substances 0.000 claims abstract description 18
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 14
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims abstract description 13
- 239000003344 environmental pollutant Substances 0.000 claims abstract description 11
- 231100000719 pollutant Toxicity 0.000 claims abstract description 11
- 239000011398 Portland cement Substances 0.000 claims abstract description 7
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 7
- 239000000843 powder Substances 0.000 claims abstract description 6
- 238000000746 purification Methods 0.000 claims abstract description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims abstract description 4
- 229910021536 Zeolite Inorganic materials 0.000 claims abstract description 3
- 229920006317 cationic polymer Polymers 0.000 claims abstract description 3
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000010842 industrial wastewater Substances 0.000 claims abstract description 3
- 239000010457 zeolite Substances 0.000 claims abstract description 3
- 230000003311 flocculating effect Effects 0.000 claims description 2
- 239000012629 purifying agent Substances 0.000 claims 1
- 239000006103 coloring component Substances 0.000 abstract description 4
- 239000000701 coagulant Substances 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract description 3
- 238000013019 agitation Methods 0.000 abstract 1
- 230000001112 coagulating effect Effects 0.000 abstract 1
- 239000003295 industrial effluent Substances 0.000 abstract 1
- 230000001376 precipitating effect Effects 0.000 abstract 1
- 238000011282 treatment Methods 0.000 description 5
- 229910001385 heavy metal Inorganic materials 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000002994 raw material Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000006228 supernatant Substances 0.000 description 3
- 238000005345 coagulation Methods 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000008394 flocculating agent Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Landscapes
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
【課題】各種産業界、下水道および土木建築工事現場等から排出される各種汚濁物質、有害成分、着色成分等を含む排水を迅速に凝集沈殿させて分離することができ、ｐＨ変動を抑えかつ有害微量成分を同時に除去することができる、アルカリ剤の追加投与を必要としない排水処理剤が必要とされている。【解決手段】 工業排水や産業排水等の被処理水の汚濁物質等を凝集せしめ沈殿可能な状態として浄化処理するために用いられる水質浄化剤において、硫酸アルミニュウム、硫酸カルシウム、炭酸ナトリウム、及びポルトランドセメントを同時に含有することを特徴とした水質浄化剤を提供する。必要に応じて、ゼオライト、カチオン系高分子凝集剤、ポリ塩化アルミニウム、のうち１以上を粉黛攪拌時に混合することを特徴とする水質浄化剤を提供する[Problem] There is a need for a wastewater treatment agent that can rapidly coagulate and separate wastewater containing various pollutants, harmful components, coloring components, etc. discharged from various industries, sewerage systems, civil engineering and construction sites, etc., by coagulating and precipitating it, while simultaneously removing harmful trace components, and does not require the additional administration of an alkaline agent. [Solution] We provide a water purification agent used to purify and coagulate pollutants, etc. in treated water such as industrial wastewater and industrial effluent, turning them into a precipitateable state, and that is characterized by simultaneously containing aluminum sulfate, calcium sulfate, sodium carbonate, and Portland cement. We provide a water purification agent characterized by mixing, as necessary, one or more of zeolite, cationic polymer coagulant, and polyaluminum chloride during powder agitation.
Description
本発明は、無機系原料を用いた、新たな排水処理剤の製造方法に関するものである。The present invention relates to a new method for producing a wastewater treatment agent using inorganic raw materials.
各種産業界、下水道および土木建築工事現場等から排出される各種汚濁物質、有害成分、着色成分等を含む排水は、排水基準の規制対象であり、これを満足するように各種汚濁物質、有害成分、着色成分等を除去した後に公共水域に放流される。近年は、環境保全の高まりから、排水基準が強化される傾向にあり、自治体によっては排水基準に上乗せして、環境基準値を採用するケースも見受けられる。Wastewater containing various pollutants, harmful components, coloring components, etc. discharged from various industries, sewerage systems, civil engineering and construction sites, etc. is subject to effluent standards, and is discharged into public waters after removing the various pollutants, harmful components, coloring components, etc. to satisfy these standards. In recent years, with the growing interest in environmental conservation, there has been a trend toward stricter effluent standards, and some local governments have adopted environmental standards in addition to the effluent standards.
これらの排水は、ポリ塩化アルミニウム（ＰＡＣ）や硫酸アルミニウム等の無機系凝集剤を添加して荷電中和（凝結効果）させた後、処理工程で変動したｐＨを、酸またはアルカリを加えて調整を行い、第二工程で高分子凝集剤を添加し、架橋吸着（フロック化）して凝集沈殿させ、処理されている。
また無機凝集剤や高分子凝集剤を添加する工程を複数有する処理も行われている。 These wastewaters are treated by adding inorganic coagulants such as polyaluminum chloride (PAC) or aluminum sulfate to neutralize the charge (coagulation effect), and then the pH, which has fluctuated during the treatment process, is adjusted by adding an acid or alkali. In the second process, a polymer coagulant is added to cross-link and adsorb the wastewater (flocculate the wastewater), causing it to coagulate and settle.
Treatments that include multiple steps of adding inorganic flocculants or polymer flocculants are also being carried out.
しかしながら、上記のような凝集沈殿処理では、使用する薬剤や処理工程が多く複雑になるとともに、撹拌槽や沈殿槽などの処理装置も過大となり、設置場所も広大になるなどの問題があった。However, the above-mentioned coagulation and sedimentation treatment has problems in that it requires a large number of chemicals and processing steps, is complicated, and the treatment equipment such as the stirring tank and the settling tank is excessively large, requiring a large installation space.
また、硫酸アルミを使用した浄水処理では、アルカリ度の消費が多きく、必要に応じてアルカリ剤の添加が必要であった。
近年では、多数の重金属類、汚濁物質、有害成分、着色成分等が共存又は複合する排水もある。このため、このような処理困難な排水を迅速に処理することができ、簡便で、低コストかつ高い除去性能を有する排水処理剤の開発が必要とされている。
（特許文献１～５） Furthermore, in water purification processes using aluminum sulfate, a large amount of alkalinity is consumed, making it necessary to add an alkaline agent as necessary.
In recent years, wastewater has been generated in which many heavy metals, pollutants, harmful components, colored components, etc. coexist or are mixed together. For this reason, there is a need for the development of a wastewater treatment agent that can rapidly treat such difficult-to-treat wastewater, and that is simple, low-cost, and has high removal performance.
(Patent Documents 1 to 5)
前述のように、すでに一般に販売されている原料を用いて、各種産業界、下水道および土木建築工事現場等から排出される各種汚濁物質、有害成分、着色成分等を含む排水を迅速に凝集沈殿させて分離することができ、ｐＨ変動を抑えかつ有害微量成分を同時に除去することができる、アルカリ剤の追加投与を必要としない排水処理剤が必要とされている。As described above, there is a need for a wastewater treatment agent that can use raw materials that are already commercially available and that can rapidly coagulate and separate wastewater containing various pollutants, harmful components, colored components, etc. discharged from various industries, sewers, civil engineering and construction sites, etc., by suppressing pH fluctuations and simultaneously removing harmful trace components, without requiring the addition of additional alkaline agents.
本発明の課題は、多数の重金属類、汚濁物質、有害成分、着色成分等が少なくとも１種以上共存又は複合する排水を迅速に清浄な上澄み水と凝集沈殿物に固液分離することができ、ｐＨ変動を抑え、かつ排水中のアルカリ度の変化に左右されない排水処理剤の製造方法を提供することにある。An object of the present invention is to provide a method for producing a wastewater treatment agent which can rapidly separate wastewater containing at least one or more of a large number of heavy metals, pollutants, harmful components, colored components, etc., coexisting or combined, into clean supernatant water and a coagulated precipitate, suppresses pH fluctuations, and is not affected by changes in alkalinity in the wastewater.
そこで、本発明者は、前述の従来技術の問題点を解決するため種々検討した結果、排水処理剤を複数の成分を最初から粉体混合する方法を見出した。
また、従来から市場にて販売されており、容易に入手できる原料を利用することにより、国内はもとより、世界中で利用が早期に可能になる製法を確立した。
多数の重金属類、汚濁物質、有害成分、着色成分等が少なくとも１種以上共存又は複合する排水に本発明による排水処理剤を利用することで、迅速に清浄な上澄み水と凝集沈殿物に固液分離することができ、かつ排水中の有害微量成分も同時に除去することができることを見出し、本発明を完成した。 Therefore, the present inventors have conducted various studies to solve the above-mentioned problems of the prior art, and have found a method of mixing a plurality of components of a wastewater treatment agent in powder form from the beginning.
In addition, by using raw materials that have been sold on the market for a long time and are easily available, we have established a manufacturing method that can be quickly used not only in Japan but also around the world.
The present inventors have found that by using the wastewater treatment agent according to the present invention for wastewater containing at least one or more of a large number of heavy metals, pollutants, harmful components, colored components, etc., which coexist or are mixed together, solid-liquid separation into clean supernatant water and coagulated sediments can be rapidly performed, and harmful trace components in the wastewater can also be removed at the same time, leading to the completion of the present invention.
すなわち、本発明は、以下の〔１〕～〔６〕を提供するものである。That is, the present invention provides the following [1] to [6].
〔１〕 工業排水や産業排水等の被処理水の汚濁物質等を凝集せしめ沈殿可能な状態として浄化処理するために用いられる排水処理剤において、硫酸アルミニュウム、硫酸カルシウム、炭酸ナトリウム、及びポルトランドセメントを同時に含有することを特徴とした排水処理剤。
〔２〕上記排水処理剤は、硫酸アルミニュウム、硫酸カルシウム、炭酸ナトリウム、及びポルトランドセメントが製造時に均等に粉体混合されることを特徴とする。請求項１に記載の排水処理剤。
〔３〕前述排水処理剤は、硫酸アルミニュウム、硫酸カルシウム、炭酸ナトリウム、及びポルトランドセメントが、それぞれ重量比において、（８～１０）：（４～６）：（３～５）：（１～３）で混合されることを特徴とした請求項１に記載の排水処理剤。
〔４〕前述排水処理剤に、ゼオライト、カチオン系高分子凝集剤、ポリ塩化アルミニウム、のうち１以上を、硫酸アルミニウム１００質量部に対して、３～８重量部を製造時に粉体混合することを特徴とする排水処理剤。
〔５〕処理対象排水１００質量部に対して０．０００１～０．１質量部を粉体にて添加して、使用するものである請求項１～４記載の排水処理剤。 [1] A wastewater treatment agent used for purifying and treating industrial wastewater or other wastewater by flocculating pollutants and other substances in the wastewater so that they can be precipitated, the wastewater treatment agent being characterized by simultaneously containing aluminum sulfate, calcium sulfate, sodium carbonate, and Portland cement.
[2] The wastewater treatment agent according to claim 1, wherein aluminum sulfate, calcium sulfate, sodium carbonate, and Portland cement are uniformly mixed in powder form during production.
[3] The wastewater treatment agent according to claim 1, characterized in that aluminum sulfate, calcium sulfate, sodium carbonate, and Portland cement are mixed in a weight ratio of (8-10):(4-6):(3-5):(1-3).
[4] A wastewater treatment agent, characterized in that one or more of zeolite, a cationic polymer flocculant, and polyaluminum chloride are powder-mixed with the wastewater treatment agent in an amount of 3 to 8 parts by weight per 100 parts by mass of aluminum sulfate during production.
[5] The wastewater treatment agent according to any one of claims 1 to 4, which is used by adding in powder form 0.0001 to 0.1 parts by mass per 100 parts by mass of wastewater to be treated.
本発明の排水処理剤を用いれば、従来行われていた、硫酸バンド・ＰＡＣなどの投入により発生していた、対象水の酸性化が生じず。対象水のｐＨは大きく変動しない。
さらに、対象水のアルカリ度が、排水処理工程に大きく関与していたため、アルカリ度の管理と、不足時にはアルカリ剤の投入が必要であった。しかし、本発明では、あらかじめ必要なアルカリ剤を混合しているため、その管理は必要としない。
また、本発明は上記の通り、硫酸バンドなどの投入による酸性化の解消のための中和処理や、同じくアルカリ度の減少に伴う追加薬剤の投入、などを解消する性能を持たせたため、これまでの工程を大幅に削減できる。このことは、多大な設備を必要とすることなく、多数の重金属類、汚濁物質、有害成分、着色成分等が少なくとも１種以上共存又は複合する排水を、より迅速に清浄な上澄み水と凝集沈殿物に固液分離することができる。 By using the wastewater treatment agent of the present invention, the target water does not become acidic, unlike the conventional practice of adding aluminum sulfate, PAC, etc., and the pH of the target water does not fluctuate significantly.
Furthermore, since the alkalinity of the target water plays a major role in the wastewater treatment process, it was necessary to manage the alkalinity and add an alkaline agent when it was insufficient. However, in the present invention, the necessary alkaline agent is mixed in advance, so there is no need to manage it.
As described above, the present invention has the capability of eliminating the need for neutralization treatment to eliminate acidification by adding aluminum sulfate or the like, as well as the need to add additional chemicals to reduce alkalinity, and thus can significantly reduce the number of steps required up to now. This means that wastewater containing at least one or more types of heavy metals, pollutants, harmful components, coloring components, etc. can be more quickly separated into clean supernatant water and coagulated sediments without the need for large facilities.
Claims (5)
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