JPS63270511A - Flocculant having deodorizing function - Google Patents
Flocculant having deodorizing functionInfo
- Publication number
- JPS63270511A JPS63270511A JP62103322A JP10332287A JPS63270511A JP S63270511 A JPS63270511 A JP S63270511A JP 62103322 A JP62103322 A JP 62103322A JP 10332287 A JP10332287 A JP 10332287A JP S63270511 A JPS63270511 A JP S63270511A
- Authority
- JP
- Japan
- Prior art keywords
- flocculant
- zinc
- chitosan
- sludge
- hydrogen sulfide
- 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.)
- Granted
Links
- 230000001877 deodorizing effect Effects 0.000 title claims abstract description 8
- 229920001661 Chitosan Polymers 0.000 claims abstract description 21
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 claims abstract description 8
- ONDPHDOFVYQSGI-UHFFFAOYSA-N zinc nitrate Chemical compound [Zn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ONDPHDOFVYQSGI-UHFFFAOYSA-N 0.000 claims abstract description 8
- ZOIORXHNWRGPMV-UHFFFAOYSA-N acetic acid;zinc Chemical compound [Zn].CC(O)=O.CC(O)=O ZOIORXHNWRGPMV-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000004246 zinc acetate Substances 0.000 claims abstract description 6
- 239000011592 zinc chloride Substances 0.000 claims abstract description 4
- 235000005074 zinc chloride Nutrition 0.000 claims abstract description 4
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 claims abstract description 4
- 229960001763 zinc sulfate Drugs 0.000 claims abstract description 4
- 229910000368 zinc sulfate Inorganic materials 0.000 claims abstract description 4
- 150000003752 zinc compounds Chemical class 0.000 claims description 9
- 238000011282 treatment Methods 0.000 abstract description 13
- 239000010802 sludge Substances 0.000 abstract description 12
- 229910000037 hydrogen sulfide Inorganic materials 0.000 abstract description 10
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 abstract description 9
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract description 7
- 239000011701 zinc Substances 0.000 abstract description 7
- 229910052725 zinc Inorganic materials 0.000 abstract description 7
- LSDPWZHWYPCBBB-UHFFFAOYSA-N Methanethiol Chemical compound SC LSDPWZHWYPCBBB-UHFFFAOYSA-N 0.000 abstract description 6
- 239000000126 substance Substances 0.000 abstract description 6
- 159000000014 iron salts Chemical class 0.000 abstract description 4
- 239000010865 sewage Substances 0.000 abstract description 3
- 239000002253 acid Substances 0.000 abstract description 2
- 230000016615 flocculation Effects 0.000 abstract description 2
- 238000005189 flocculation Methods 0.000 abstract description 2
- 230000003311 flocculating effect Effects 0.000 abstract 1
- 239000002689 soil Substances 0.000 abstract 1
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 229920000620 organic polymer Polymers 0.000 description 6
- 239000000243 solution Substances 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 239000008394 flocculating agent Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000003929 acidic solution Substances 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011790 ferrous sulphate Substances 0.000 description 2
- 235000003891 ferrous sulphate Nutrition 0.000 description 2
- 239000010800 human waste Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 2
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 2
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 description 2
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 2
- 229910000360 iron(III) sulfate Inorganic materials 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 239000010801 sewage sludge Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- BZSXEZOLBIJVQK-UHFFFAOYSA-N 2-methylsulfonylbenzoic acid Chemical compound CS(=O)(=O)C1=CC=CC=C1C(O)=O BZSXEZOLBIJVQK-UHFFFAOYSA-N 0.000 description 1
- 239000005708 Sodium hypochlorite Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000002738 chelating agent Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 150000002505 iron Chemical class 0.000 description 1
- 230000005923 long-lasting effect Effects 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
Landscapes
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Treatment Of Sludge (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は下水処理場、し尿処理場、食品工場、化学工
場などの汚泥処理、凝集法でん処理に使用する脱臭機能
を有する凝集剤に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a flocculant having a deodorizing function used in sludge treatment and coagulation method treatment in sewage treatment plants, human waste treatment plants, food factories, chemical factories, etc.
従来の技術
従来、下水処理場、し尿処理場、食品工場、化学工場、
と場などの汚泥処理、凝集法でん処理では硫化水素、メ
チルメルカプタンなどの硫化物、アンモニア、アミン類
などの悪臭４が問題となっているが、この除去方法とし
ては過酸化水素、次亜塩素酸ソーダなどの酸化剤を用い
るか、硫酸第１鉄、塩化第２鉄、硫酸第２鉄、ポリ硫酸
鉄などの鉄塩を用いる方法がある。Conventional technology Conventionally, sewage treatment plants, human waste treatment plants, food factories, chemical factories,
Sludge treatment at abattoirs and flocculation method sludge treatment have problems with bad odors4 such as hydrogen sulfide, sulfides such as methyl mercaptan, ammonia, and amines. There is a method of using an oxidizing agent such as sodium chlorate, or using an iron salt such as ferrous sulfate, ferric chloride, ferric sulfate, or polyferrous sulfate.
一方凝集剤としてはポリアクリル酸ソーダ、ポリアクリ
ルアマイドなどの有機高分子が使用されている。しかし
最近上記の有機高分子凝集剤の毒性が問題となり、添加
量の比較的多い量を必要とする汚泥の脱水処理では、天
然物として得られる有機高分子凝集剤であるキトサンが
一部で使用されている。On the other hand, organic polymers such as sodium polyacrylate and polyacrylamide are used as flocculants. Recently, however, the toxicity of the above-mentioned organic polymer flocculants has become a problem, and chitosan, a naturally occurring organic polymer flocculant, is used in some sludge dewatering treatments that require relatively large amounts of additives. has been done.
硫化水素、メチルメルカプタン、アンモニア、アミン類
などの悪臭物質を過酸化水素、次亜塩素酸ソーダなどの
酸化剤で処理する方法は、処理コストが高く装置の腐食
が大きいほか、酸化剤が他の有機物の分解に消費される
ので３〜４倍当量が必要であるなどの欠点がある。また
硫酸第１鉄、塩化第２鉄、硫酸第２鉄、ポリ硫酸鉄など
の鉄塩を用いる方法は、持続性が長く凝集剤としても有
効に作用するなどの特長があるが、使用１時のｐＨが低
下し、鉄成分と反応して固定した硫化水素がｐＨの変動
によって再び遊離するので有機高分子凝集剤との併用が
必要である。そして処理した汚泥や排水が着色するとか
、有機高分子凝集剤との二液併用は取扱いが不便である
などの欠点がある。Methods of treating malodorous substances such as hydrogen sulfide, methyl mercaptan, ammonia, and amines with oxidizing agents such as hydrogen peroxide and sodium hypochlorite are expensive, cause significant equipment corrosion, and are Since it is consumed in the decomposition of organic matter, it has the disadvantage that 3 to 4 times the equivalent amount is required. In addition, methods using iron salts such as ferrous sulfate, ferric chloride, ferric sulfate, and polyferrous sulfate have the advantage of being long-lasting and acting effectively as flocculants. It is necessary to use an organic polymer flocculant in combination because the pH of the iron component decreases and the fixed hydrogen sulfide reacts with the iron component and becomes liberated again due to the pH fluctuation. There are also disadvantages such as coloring of the treated sludge and wastewater, and inconvenience in handling when used in combination with an organic polymer flocculant.
一方天然の有機高分子凝集剤であるキトサンは、酢酸な
どに溶解するが水溶液の製造が困難である。On the other hand, chitosan, a natural organic polymer flocculant, dissolves in acetic acid and the like, but it is difficult to produce an aqueous solution.
問題点を解決するための手段
本発明者は上記の問題点を解決するため種々研究全した
ところ、１．亜鉛化合物が鉄塩よりも悪臭物質と反応し
易いこと、２．亜鉛化合物は鉄塩よりも少量で十分な脱
臭効果をあげること、３．キトサンはｐＨ３程度の酸性
液に溶解すること、４．亜鉛化合物はキトサンの酸性溶
液に溶解し易いこと、５゜キトサンは金属イオンとキレ
−トラ作り易いことなどを知見した。Means for Solving the Problems The inventor of the present invention has conducted various researches in order to solve the above problems, and has found 1. 2. Zinc compounds react more easily with malodorous substances than iron salts. 3. Zinc compounds have sufficient deodorizing effects in smaller amounts than iron salts. 4. Chitosan should be dissolved in an acidic solution with a pH of about 3. It was found that zinc compounds are easily dissolved in an acidic solution of chitosan, and that 5° chitosan is easy to form chelators with metal ions.
本発明はこれらの知見に基づくものであって酢酸亜鉛、
硫酸亜鉛、硝酸亜鉛、塩化亜鉛からなる亜鉛化合物の１
種以上をキトサンに含有させることを特徴とする脱臭國
能を有する凝集剤である。The present invention is based on these findings, and includes zinc acetate,
A zinc compound consisting of zinc sulfate, zinc nitrate, and zinc chloride
It is a flocculant having deodorizing ability characterized by containing more than one species in chitosan.
本発明で用いる亜鉛化合物は、上記のものであればいず
れでもよいが、均一性や取扱いの容易さを考慮すると酢
酸亜鉛が最も好ましい。また亜鉛化合物中の亜鉛成分と
キトサンの割合は重量比で０．０１〜５．０が好ましい
。亜鉛成分とキトサンの重量比が０・０１以下では脱臭
効果がなく５．０以上では凝集効果が悪くなると共に亜
鉛の未反応分が処理水中に残留し排水の水質基帛を越え
るおそれがある。The zinc compound used in the present invention may be any of the compounds mentioned above, but zinc acetate is most preferred in view of uniformity and ease of handling. The weight ratio of the zinc component to chitosan in the zinc compound is preferably 0.01 to 5.0. If the weight ratio of the zinc component to chitosan is less than 0.01, there will be no deodorizing effect, and if it is more than 5.0, the coagulation effect will be poor, and unreacted zinc may remain in the treated water, potentially exceeding the water quality of the wastewater.
本発明の脱臭機能を有する凝集剤は、固体でも液体でも
良いが、使用時の均一性、添加方法などを考慮すると液
体の方が好ましい。そして固体の場合はキトサンと亜鉛
化合物とを一定の割合で混合すればよい。液体の場合は
キトサンを希酸に溶解したものと前記亜鉛化合物の溶液
とを一定の割合で混合して調製する。The flocculant having a deodorizing function of the present invention may be either solid or liquid, but in consideration of uniformity during use, addition method, etc., liquid is preferable. In the case of a solid, chitosan and a zinc compound may be mixed at a certain ratio. In the case of a liquid, it is prepared by mixing chitosan dissolved in a dilute acid and a solution of the zinc compound at a fixed ratio.
実施例
（１） キトサンを１％の酢酸溶液に溶解し、キトサ
ンの２％溶液を調製する。これに酢酸亜鉛溶液を添加し
亜鉛成分とキトサンの重量比が所定の値になるようにし
て本発明に係る凝集剤を調整する。つぎにｐＨが６．０
、全硫黄分の濃度が２．９％、Ｈ２Ｓの濃度が１６０
ｐｐｍ 、 ＣＨ３８Ｈの濃度が８０ｐｐｍの下水汚泥
に対し、汚泥中の乾燥固形分に対し０．５％に相当する
割合で前記の凝集剤を添加した後、ベルトプレス試験機
で脱水濾過した汚泥中のＨ２Ｓ等を第１表に示す〇
第 １ 表
第７１７表に示すとおり亜鉛成分とキトサンの重量比０
．０１〜５．０が良好なことが判る。Example (1) Chitosan is dissolved in a 1% acetic acid solution to prepare a 2% solution of chitosan. A flocculant according to the present invention is prepared by adding a zinc acetate solution to the solution so that the weight ratio of the zinc component to chitosan becomes a predetermined value. Next, the pH is 6.0
, total sulfur concentration is 2.9%, H2S concentration is 160
After adding the above flocculant to sewage sludge with a CH38H concentration of 80 ppm at a rate equivalent to 0.5% of the dry solid content in the sludge, the sludge was dehydrated and filtered using a belt press tester. H2S etc. are shown in Table 1.〇Table 1 As shown in Table 717, the weight ratio of zinc component and chitosan is 0.
．． It can be seen that 01 to 5.0 is good.
（２）亜鉛成分とキトサンとの重量比が１．０であって
、キトサンの濃度が２．０％の本発明に係る凝集剤を調
製する。つぎにＩ）Ｈ５−９、全硫黄分の濃度２．７％
、ＶＴＳ（有機分） ７３．８％、Ｈ２Ｓの濃度が９０
０ｐＩ）ｍ ５ＣＨ３８Ｈの濃度が８６ ｐｐｍの下水
汚泥に対し、汚泥中の乾燥固形分に対し０．５％に相当
する割合で前記の凝集剤を添加した後、ベルトプレス試
験機で脱水濾過したものと同じ汚泥に対しキトサンのみ
全添加して処理した汚泥中のＨ２Ｓ＠’に第２表に示す
。(2) A flocculant according to the present invention is prepared in which the weight ratio of zinc component to chitosan is 1.0 and the concentration of chitosan is 2.0%. Next I) H5-9, total sulfur concentration 2.7%
, VTS (organic content) 73.8%, H2S concentration 90
0 pI) m 5CH38H To sewage sludge with a concentration of 86 ppm, the above-mentioned flocculant was added in a proportion equivalent to 0.5% of the dry solid content in the sludge, and then dewatered and filtered using a belt press tester. Table 2 shows the H2S@' in the same sludge treated with only chitosan added.
第 ２ 表
発明の効果
本発明によれば、汚泥に対し少量の添加で硫化水素等の
悪臭成分を除去することができるので実用上の価値は大
である。Table 2 Effects of the Invention According to the present invention, malodorous components such as hydrogen sulfide can be removed by adding a small amount to sludge, so it is of great practical value.
Claims (1)
化合物の１種以上をキトサンに含有させることを特徴と
する脱臭機能を有する凝集剤。A flocculant having a deodorizing function, characterized in that chitosan contains one or more zinc compounds consisting of zinc acetate, zinc sulfate, zinc nitrate, and zinc chloride.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62103322A JPS63270511A (en) | 1987-04-28 | 1987-04-28 | Flocculant having deodorizing function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62103322A JPS63270511A (en) | 1987-04-28 | 1987-04-28 | Flocculant having deodorizing function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63270511A true JPS63270511A (en) | 1988-11-08 |
| JPH0412164B2 JPH0412164B2 (en) | 1992-03-03 |
Family
ID=14350956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62103322A Granted JPS63270511A (en) | 1987-04-28 | 1987-04-28 | Flocculant having deodorizing function |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63270511A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01210006A (en) * | 1988-02-18 | 1989-08-23 | Nittetsu Mining Co Ltd | Coagulating agent with deodorizing function |
| US20120145645A1 (en) * | 2010-12-13 | 2012-06-14 | Halosource, Inc. | Clarification of hydrocarbons and suspended matter from an aqueous medium |
| CN106745610A (en) * | 2016-12-29 | 2017-05-31 | 沈阳建筑大学 | Modification of chitosan carries the preparation of Zn complex and the application of removal ammonia nitrogen pollutant |
-
1987
- 1987-04-28 JP JP62103322A patent/JPS63270511A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01210006A (en) * | 1988-02-18 | 1989-08-23 | Nittetsu Mining Co Ltd | Coagulating agent with deodorizing function |
| US20120145645A1 (en) * | 2010-12-13 | 2012-06-14 | Halosource, Inc. | Clarification of hydrocarbons and suspended matter from an aqueous medium |
| CN106745610A (en) * | 2016-12-29 | 2017-05-31 | 沈阳建筑大学 | Modification of chitosan carries the preparation of Zn complex and the application of removal ammonia nitrogen pollutant |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0412164B2 (en) | 1992-03-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |