JP2003245691A - Method for deodorizing dehydrated cake - Google Patents
Method for deodorizing dehydrated cakeInfo
- Publication number
- JP2003245691A JP2003245691A JP2002049694A JP2002049694A JP2003245691A JP 2003245691 A JP2003245691 A JP 2003245691A JP 2002049694 A JP2002049694 A JP 2002049694A JP 2002049694 A JP2002049694 A JP 2002049694A JP 2003245691 A JP2003245691 A JP 2003245691A
- Authority
- JP
- Japan
- Prior art keywords
- deodorant
- dehydrated cake
- sprayed
- cake
- sludge
- 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 44
- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000002781 deodorant agent Substances 0.000 claims abstract description 98
- 239000010802 sludge Substances 0.000 claims abstract description 43
- 238000012546 transfer Methods 0.000 claims abstract description 5
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 claims description 12
- 238000005507 spraying Methods 0.000 claims description 12
- 230000000844 anti-bacterial effect Effects 0.000 claims description 9
- 239000003899 bactericide agent Substances 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 229910052708 sodium Inorganic materials 0.000 claims description 6
- 239000011734 sodium Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 abstract description 14
- 239000007788 liquid Substances 0.000 abstract 2
- LSDPWZHWYPCBBB-UHFFFAOYSA-N Methanethiol Chemical compound SC LSDPWZHWYPCBBB-UHFFFAOYSA-N 0.000 description 18
- 239000007921 spray Substances 0.000 description 15
- 230000000052 comparative effect Effects 0.000 description 10
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 8
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 8
- 239000004698 Polyethylene Substances 0.000 description 6
- 239000004568 cement Substances 0.000 description 6
- 239000003337 fertilizer Substances 0.000 description 6
- -1 polyethylene Polymers 0.000 description 6
- 229920000573 polyethylene Polymers 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000007864 aqueous solution Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 4
- 238000007865 diluting Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 150000003839 salts Chemical group 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- XNRNJIIJLOFJEK-UHFFFAOYSA-N sodium;1-oxidopyridine-2-thione Chemical compound [Na+].[O-]N1C=CC=CC1=S XNRNJIIJLOFJEK-UHFFFAOYSA-N 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- DPBJAVGHACCNRL-UHFFFAOYSA-N 2-(dimethylamino)ethyl prop-2-enoate Chemical compound CN(C)CCOC(=O)C=C DPBJAVGHACCNRL-UHFFFAOYSA-N 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 2
- 239000004480 active ingredient Substances 0.000 description 2
- 239000000701 coagulant Substances 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 238000004332 deodorization Methods 0.000 description 2
- 239000010840 domestic wastewater Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010800 human waste Substances 0.000 description 2
- 230000002688 persistence Effects 0.000 description 2
- 235000010288 sodium nitrite Nutrition 0.000 description 2
- JKNCOURZONDCGV-UHFFFAOYSA-N 2-(dimethylamino)ethyl 2-methylprop-2-enoate Chemical compound CN(C)CCOC(=O)C(C)=C JKNCOURZONDCGV-UHFFFAOYSA-N 0.000 description 1
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical group NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- NIPNSKYNPDTRPC-UHFFFAOYSA-N N-[2-oxo-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 NIPNSKYNPDTRPC-UHFFFAOYSA-N 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- PFRUBEOIWWEFOL-UHFFFAOYSA-N [N].[S] Chemical class [N].[S] PFRUBEOIWWEFOL-UHFFFAOYSA-N 0.000 description 1
- 230000004931 aggregating effect Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- CAMXVZOXBADHNJ-UHFFFAOYSA-N ammonium nitrite Chemical compound [NH4+].[O-]N=O CAMXVZOXBADHNJ-UHFFFAOYSA-N 0.000 description 1
- DMSMPAJRVJJAGA-UHFFFAOYSA-N benzo[d]isothiazol-3-one Chemical compound C1=CC=C2C(=O)NSC2=C1 DMSMPAJRVJJAGA-UHFFFAOYSA-N 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000417 fungicide Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 230000005923 long-lasting effect Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Landscapes
- Agricultural Chemicals And Associated Chemicals (AREA)
- Treatment Of Sludge (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、汚泥の脱水ケーキ
の脱臭方法に関し、さらに詳しくは、排水処理などで生
じる汚泥の脱水ケーキを脱臭する方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for deodorizing a sludge dewatering cake, and more particularly to a method for deodorizing a sludge dewatering cake produced in wastewater treatment or the like.
【０００２】[0002]
【従来の技術】従来、下水などの各種排水は生物的、化
学的に処理され、その際生じた汚泥は脱水により脱水ケ
ーキとされたのち、焼却または埋設などの廃棄処理がな
されていた。しかし、現在では、この脱水ケーキを脱臭
し、セメントの骨材や肥料に用いるなどして再利用が図
られている。2. Description of the Related Art Conventionally, various wastewater such as sewage has been biologically and chemically treated, and sludge produced at that time has been dehydrated into a dehydrated cake and then disposed of by incineration or burial. However, at present, the dehydrated cake is deodorized and reused by using it as cement aggregate or fertilizer.
【０００３】脱水ケーキを脱臭する方法としては、たと
えば特開２０００−２０２４９４号公報や特開２０００
−２８８５９２号公報において、脱臭剤として亜硝酸塩
や亜硫酸塩などを添加した汚泥を脱水することにより、
脱臭処理を施した脱水ケーキを得る方法が開示されてい
る。As a method for deodorizing the dehydrated cake, for example, JP-A-2000-202494 and JP-A-2000.
In JP-A-288592, by dehydrating sludge to which nitrite, sulfite or the like is added as a deodorant,
A method for obtaining a dehydrated cake that has been deodorized is disclosed.
【０００４】しかしながら、これらの方法で脱水ケーキ
を得る場合、汚泥を脱水する際に脱臭剤が流出してしま
うおそれがあった。したがって、この流出を考慮して、
脱臭剤を所定量より多めに汚泥に添加する必要があり、
結果的にランニングコストが高くつくという問題があっ
た。However, when the dehydrated cake is obtained by these methods, there is a risk that the deodorant may flow out when the sludge is dehydrated. Therefore, considering this outflow,
It is necessary to add more deodorant to the sludge than the specified amount,
As a result, there was a problem that the running cost was high.
【０００５】また、脱臭剤の成分として銅や亜鉛などの
金属を含む場合もあり、脱水ケーキの再利用に対しても
問題があった。In some cases, metals such as copper and zinc are contained as a component of the deodorant, and there is a problem in reusing the dehydrated cake.
【０００６】[0006]
【発明が解決しようとする課題】本発明では、脱水ケー
キの脱臭方法において、少量の脱臭剤でも効率よく脱臭
することができる方法を提供することにより、脱臭剤の
使用量を低減させ、ランニングコストを低減することを
目的とする。DISCLOSURE OF THE INVENTION The present invention provides a method for deodorizing a dehydrated cake, which can efficiently deodorize even a small amount of deodorant, thereby reducing the amount of deodorant used and running cost. The purpose is to reduce
【０００７】また同時に、本発明では、ナトリウム以外
の金属を含まない脱臭剤を用いることにより、脱臭した
脱水ケーキをセメント骨材や肥料として再利用すること
ができる方法を提供することを目的とする。At the same time, another object of the present invention is to provide a method capable of reusing the deodorized dehydrated cake as cement aggregate or fertilizer by using a deodorant containing no metal other than sodium. .
【０００８】[0008]
【課題を解決するための手段】すなわち、本発明は、汚
泥の脱水ケーキに脱臭剤を噴霧する脱水ケーキの脱臭方
法であって、噴霧する脱臭剤の液滴の粒径が１０００μ
ｍ以下であることを特徴とする脱水ケーキの脱臭方法に
関する。本発明によれば、脱水ケーキへ脱臭剤を噴霧す
るので、汚泥に脱臭剤を添加したのち脱水して脱水ケー
キを得る従来技術と比較して、脱水による脱臭剤の流出
がなく、少量の脱臭剤で長時間脱臭効果を持続させるこ
とができる。That is, the present invention relates to a deodorizing method for a dehydrated cake in which the deodorant is sprayed onto the dehydrated cake of sludge, and the droplet size of the sprayed deodorant is 1000 μm.
It is related with the deodorizing method of the dehydrated cake characterized by being m or less. According to the present invention, since the deodorant is sprayed on the dehydrated cake, the deodorant does not flow out due to dehydration and a small amount of deodorant is obtained, as compared with the conventional technique in which the deodorant is added to sludge and then dehydrated to obtain the dehydrated cake. The deodorant effect can be maintained for a long time with the agent.
【０００９】本発明においては、脱臭剤を噴霧した脱水
ケーキをセメントの骨材や肥料として有効に再利用する
ために、亜硝酸塩と殺菌剤とを含み、ナトリウム以外の
金属を含まない脱臭剤を用いることが好ましい。In the present invention, in order to effectively reuse the dehydrated cake sprayed with the deodorant as an aggregate or fertilizer for cement, a deodorant containing nitrite and a bactericide and containing no metal other than sodium is used. It is preferable to use.
【００１０】本発明においては、脱水ケーキに脱臭剤を
均一に吸着させて、少量の脱臭剤で効率よく脱臭するた
めに、脱水ケーキを移送中に落下させ、落下中の脱水ケ
ーキに脱臭剤を噴霧すること、とくに落下開始直後の脱
水ケーキに脱臭剤を噴霧することが好ましい。In the present invention, in order to allow the deodorant to be uniformly adsorbed on the dehydrated cake and to efficiently deodorize with a small amount of the deodorant, the dehydrated cake is dropped during transfer, and the deodorant is added to the falling dehydrated cake. It is preferable to spray the deodorant, especially to the dehydrated cake immediately after the start of the fall.
【００１１】本発明においては、脱臭剤の噴霧を脱水ケ
ーキ全面に行ないやすくするために、解砕機で解砕した
脱水ケーキに脱臭剤を噴霧すること、とくに脱水ケーキ
の長辺が１０〜５０ｍｍであることが好ましい。In the present invention, in order to facilitate the spraying of the deodorant on the entire surface of the dehydrated cake, the deodorant is sprayed on the dehydrated cake crushed by a crusher, and particularly when the long side of the dehydrated cake is 10 to 50 mm. Preferably there is.
【００１２】本発明において、脱臭とは、すでに発生し
ている悪臭を除去すること、および放置しておけば発生
するであろう悪臭を発生しないようにすることの両方を
含む概念である。In the present invention, the deodorization is a concept including both removal of the malodor that has already occurred and prevention of the malodor that would occur if left unattended.
【００１３】[0013]
【発明の実施の形態】本発明の脱臭方法においては、汚
泥の脱水ケーキに脱臭剤を噴霧する。BEST MODE FOR CARRYING OUT THE INVENTION In the deodorizing method of the present invention, a deodorant is sprayed on a dehydrated cake of sludge.
【００１４】汚泥としては、たとえば、下水、各種工場
排水、家庭排水、し尿などの処理施設において発生する
汚泥をあげることができる。Examples of sludge include sludge generated in a treatment facility for sewage, various factory wastewater, domestic wastewater, human waste, and the like.
【００１５】脱水ケーキは、たとえば、汚泥に凝集剤を
添加して、固形分を沈殿させたのちに、水分を除去する
ことにより得られる。凝集剤としては、たとえば、ジメ
チルアミノエチルアクリレート４級塩の重合体、ジメチ
ルアミノエチルメタクリレート４級塩の重合体、これら
の４級塩とアクリルアミドとの共重合体、ポリアミジン
などが用いられる。水分は、たとえば、加圧プレス器、
遠心脱水機、ベルトプレス脱水機、スクリュープレス脱
水機、フィルタープレス脱水機、真空脱水機などにより
除去される。The dehydrated cake is obtained, for example, by adding a coagulant to sludge to precipitate solids and then removing water. As the aggregating agent, for example, a polymer of a quaternary salt of dimethylaminoethyl acrylate, a polymer of a quaternary salt of dimethylaminoethyl methacrylate, a copolymer of these quaternary salt and acrylamide, polyamidine and the like are used. Moisture is, for example, a pressure press,
It is removed by a centrifugal dehydrator, a belt press dehydrator, a screw press dehydrator, a filter press dehydrator, a vacuum dehydrator and the like.
【００１６】脱臭剤の有効成分としては、たとえば、亜
硝酸塩、亜硫酸塩、硝酸塩などを用いることができ、さ
らに、亜硝酸塩と殺菌剤とを併用することにより、脱臭
効果を持続させることができる。脱臭剤として、ナトリ
ウム以外の金属を含まない脱臭剤を使用することによ
り、脱臭剤を噴霧した脱水ケーキをセメントの骨材や肥
料として再利用しやすくなる。As the active ingredient of the deodorant, for example, nitrite, sulfite, nitrate or the like can be used. Further, the combined use of nitrite and a bactericide can maintain the deodorizing effect. By using a deodorant containing no metal other than sodium as the deodorant, the dehydrated cake sprayed with the deodorant can be easily reused as an aggregate or fertilizer for cement.
【００１７】とくに亜硝酸塩と殺菌剤とを含み、ナトリ
ウム以外の金属を含まない脱臭剤を使用することによ
り、脱臭効果を持続させることができ、脱臭剤を噴霧し
た脱水ケーキをセメントの骨材や肥料として再利用しや
すくすることができる。In particular, by using a deodorizing agent containing nitrite and a bactericide and containing no metal other than sodium, the deodorizing effect can be maintained, and the dehydrated cake sprayed with the deodorizing agent can be used as a cement aggregate or It can be easily reused as fertilizer.
【００１８】本発明で使用される亜硝酸塩の例として
は、たとえば、亜硝酸ナトリウム、亜硝酸アンモニウム
などがあげられる。Examples of the nitrite used in the present invention include sodium nitrite and ammonium nitrite.
【００１９】本発明で使用される殺菌剤の例としては、
たとえば、ナトリウムピリチオン、２，２´―ジチオビ
ス―ピリジン―１，１´−ジオキシド（ＯＤＳ）、１，
２―ベンズイソチアゾリン―３−オン（ＢＩＴ）などの
有機チッ素硫黄系化合物などをあげることができる。脱
臭効果の持続性が高いことから、ナトリウムピリチオン
およびＯＤＳが好ましい。Examples of fungicides used in the present invention include:
For example, sodium pyrithione, 2,2'-dithiobis-pyridine-1,1'-dioxide (ODS), 1,
Examples thereof include organic nitrogen-sulfur compounds such as 2-benzisothiazolin-3-one (BIT). Sodium pyrithione and ODS are preferred because of their long-lasting deodorizing effect.
【００２０】亜硝酸塩と殺菌剤とを併用する場合、脱臭
剤は、たとえば、亜硝酸塩を２０〜４２重量％、および
殺菌剤を０．１〜２０重量％、好ましくは、亜硝酸塩を
３０〜４２重量％、および殺菌剤を１〜１０重量％含み
うる。亜硝酸塩の含有量が多いと脱臭効果が高まる傾向
はあるが、溶解度をこえると析出する傾向があり、少な
いと脱臭効果が発揮されにくい。また、殺菌剤の含有量
が多いと脱臭効果が高まる傾向はあるが、価格が高くな
り、少ないと脱臭効果が発揮されにくい。When a nitrite and a bactericide are used in combination, the deodorant is, for example, 20 to 42% by weight of nitrite and 0.1 to 20% by weight of the bactericide, preferably 30 to 42% of nitrite. % By weight, and 1-10% by weight of bactericide. When the content of nitrite is high, the deodorizing effect tends to be enhanced, but when it exceeds the solubility, it tends to be precipitated, and when it is low, the deodorizing effect is difficult to be exhibited. Further, although the deodorizing effect tends to be enhanced when the content of the bactericide is high, the price is high and the deodorizing effect is difficult to be exerted when the content is low.
【００２１】本発明で使用される脱臭剤としては、亜硝
酸塩として亜硝酸ナトリウムを３０〜４２重量％と、殺
菌剤としてナトリウムピリチオンまたはＯＤＳを１〜３
０重量％を含有する脱臭剤が最も好ましい。As the deodorant used in the present invention, 30 to 42% by weight of sodium nitrite as a nitrite and 1 to 3 of sodium pyrithione or ODS as a bactericide are used.
Most preferred is a deodorant containing 0% by weight.
【００２２】脱臭剤は、たとえば、有効成分を水で希釈
した水溶液などとして用いられる。The deodorant is used, for example, as an aqueous solution obtained by diluting the active ingredient with water.
【００２３】脱臭剤を脱水ケーキに噴霧することによ
り、脱水ケーキを脱臭することができる。The dehydrated cake can be deodorized by spraying the deodorant on the dehydrated cake.
【００２４】脱臭剤を脱水ケーキに噴霧するときの脱水
ケーキに対する脱臭剤の使用量は、たとえば、脱水ケー
キ１００重量部に対して０．１〜１０重量部、好ましく
は０．２〜０．５重量部とすることができる。脱臭剤の
使用量が少ないと脱臭効果が発揮されにくく、使用量が
多いと脱臭効果は高まるが、ランニングコストが高くな
る傾向がある。When the deodorant is sprayed onto the dehydrated cake, the amount of the deodorant used with respect to the dehydrated cake is, for example, 0.1 to 10 parts by weight, preferably 0.2 to 0.5, relative to 100 parts by weight of the dehydrated cake. It can be part by weight. When the amount of the deodorant used is small, the deodorizing effect is difficult to be exhibited, and when the amount of the deodorant is large, the deodorizing effect increases, but the running cost tends to increase.
【００２５】噴霧の方法としては、空円錐ノズルなどの
噴霧ノズルを使用する方法をあげることができる。As a method of spraying, a method of using a spray nozzle such as an empty cone nozzle can be mentioned.
【００２６】脱水ケーキへの脱臭剤の噴霧は、たとえ
ば、汚泥を脱水して得られる脱水ケーキを、ベルトコン
ベヤーでケーキホッパーやケーキヤードへ移送する際に
行なわれる。The deodorant is sprayed onto the dehydrated cake, for example, when the dehydrated cake obtained by dehydrating sludge is transferred to a cake hopper or a cake yard by a belt conveyor.
【００２７】たとえば、脱水ケーキを落下させ、落下中
の脱水ケーキ、とくに、落下開始直後の脱水ケーキに、
脱臭剤を噴霧することが好ましい。脱水ケーキを落下さ
せることによって、脱水ケーキ同士の重なりを少なくす
ることができ、脱臭剤を均一に吸着させることができ
る。脱臭剤を均一に吸着させることにより、少量の脱臭
剤で効率よく脱臭することができる。For example, the dehydrated cake is dropped, and the dehydrated cake which is being dropped, especially the dehydrated cake immediately after the start of the fall,
It is preferable to spray a deodorant. By dropping the dehydrated cakes, the overlap between the dehydrated cakes can be reduced, and the deodorant can be uniformly adsorbed. By uniformly adsorbing the deodorant, it is possible to efficiently deodorize with a small amount of the deodorant.
【００２８】解砕機で解砕した脱水ケーキ、たとえば、
汚泥を脱水機で脱水して得られるシート状の脱水ケーキ
を解砕機で解砕した塊状の脱水ケーキに、脱臭剤を噴霧
することができる。脱水ケーキを解砕することにより、
脱水ケーキの大きさを調節することができ、脱水ケーキ
の全面に脱臭剤を噴霧しやすくすることができる。Dehydrated cake crushed by a crusher, for example,
A deodorant can be sprayed on a block-shaped dehydrated cake obtained by crushing a sheet-shaped dehydrated cake obtained by dehydrating sludge with a dehydrator. By crushing the dehydrated cake,
The size of the dehydrated cake can be adjusted, and the deodorant can be easily sprayed on the entire surface of the dehydrated cake.
【００２９】脱臭剤を噴霧する脱水ケーキの長辺が１０
〜５０ｍｍ、好ましくは１０〜３０ｍｍであるとき、脱
水ケーキの全面に脱臭剤を噴霧しやすくなる。脱水ケー
キの長辺が５０ｍｍをこえると、脱水ケーキ全面に脱臭
剤を噴霧することが難しくなる傾向がある。The long side of the dehydrated cake sprayed with the deodorant has a length of 10
When it is -50 mm, preferably 10-30 mm, it becomes easy to spray the deodorant on the entire surface of the dehydrated cake. When the long side of the dehydrated cake exceeds 50 mm, it tends to be difficult to spray the deodorant on the entire surface of the dehydrated cake.
【００３０】脱水ケーキに噴霧する脱臭剤の液滴の粒径
を、１０００μｍ以下、好ましくは１０〜１０００μ
ｍ、より好ましくは１０〜１００μｍとすることによ
り、少量の脱臭剤で効率よく脱臭することができる。脱
臭剤の液滴の粒径が１０μｍ未満のときには、液滴が軽
すぎて舞い上がり、脱水ケーキに所定量の脱臭剤を噴霧
しにくくなる傾向がある。また、粒径が１０００μｍを
こえるときには、脱水ケーキ全体に脱臭剤を噴霧しにく
くなるため、脱臭効果が低下する傾向がある。脱臭剤の
粒径は、たとえば、脱臭剤を噴霧する噴霧ノズルの口径
により、調節される。The particle size of the droplets of the deodorant sprayed on the dehydrated cake is 1000 μm or less, preferably 10 to 1000 μm.
m, and more preferably 10 to 100 μm enables efficient deodorization with a small amount of deodorant. When the particle size of the deodorant droplets is less than 10 μm, the droplets are so light that they fly up and it is difficult to spray a predetermined amount of deodorant onto the dehydrated cake. Further, when the particle size exceeds 1000 μm, it becomes difficult to spray the deodorant on the entire dehydrated cake, so that the deodorizing effect tends to decrease. The particle size of the deodorant is adjusted by, for example, the diameter of a spray nozzle that sprays the deodorant.
【００３１】本発明の脱臭方法は、たとえば、図１の処
理工程にしたがって実施することができる。図１は、本
発明の脱臭方法の一実施の形態の処理工程を示す概略図
である。図１中、１は脱水機を、２はシート状の脱水ケ
ーキを、３、６、７はベルトコンベヤーを、４は解砕機
を、５は塊状の脱水ケーキを、８は噴霧ノズルを、９は
ケーキホッパーを示す。The deodorizing method of the present invention can be carried out, for example, according to the processing steps shown in FIG. FIG. 1 is a schematic diagram showing the processing steps of an embodiment of the deodorizing method of the present invention. In FIG. 1, 1 is a dehydrator, 2 is a sheet-shaped dewatering cake, 3, 6 and 7 are belt conveyors, 4 is a crusher, 5 is a block-shaped dewatering cake, 8 is a spray nozzle, 9 Indicates a cake hopper.
【００３２】図１の処理工程においては、まず、脱水機
１から排出されたシート状の脱水ケーキ２をベルトコン
ベヤー３で解砕機４に移送し、解砕して塊状の脱水ケー
キ５を得る。つぎに、得られた塊状の脱水ケーキ５をベ
ルトコンベヤー６で移送し、ケーキホッパー９に達する
ベルトコンベヤー７上に落下させる。そして、塊状の脱
水ケーキ５をベルトコンベヤー６からベルトコンベヤー
７上に落下させ、落下開始直後に、噴霧ノズル８により
脱臭剤を噴霧する。In the treatment step of FIG. 1, first, the sheet-shaped dehydrated cake 2 discharged from the dehydrator 1 is transferred to the crusher 4 by the belt conveyor 3 and crushed to obtain the lump-shaped dehydrated cake 5. Next, the obtained block-shaped dehydrated cake 5 is transferred by the belt conveyor 6 and dropped onto the belt conveyor 7 which reaches the cake hopper 9. Then, the block-shaped dehydrated cake 5 is dropped from the belt conveyor 6 onto the belt conveyor 7, and immediately after the start of the dropping, the deodorant is sprayed by the spray nozzle 8.
【００３３】たとえば、ベルトコンベヤー６の上昇角度
を１〜２０°とし、ベルトコンベヤー６からベルトコン
ベヤー７上までの落下距離を０．１〜１．５ｍとするこ
とができる。For example, the rising angle of the belt conveyor 6 can be set to 1 to 20 °, and the fall distance from the belt conveyor 6 to the belt conveyor 7 can be set to 0.1 to 1.5 m.
【００３４】本発明の脱臭方法は、下水、各種工場排
水、家庭排水、し尿などの処理の際に発生する汚泥を脱
水して得られる脱水ケーキから、悪臭の原因となる硫化
水素やメチルメルカプタンなどが発生することを防止す
るために、有効に利用される。The deodorizing method of the present invention is a dehydrated cake obtained by dehydrating sludge generated during the treatment of sewage, various factory wastewater, domestic wastewater, human waste, etc., to hydrogen sulfide and methyl mercaptan which cause an offensive odor. Is effectively used to prevent the occurrence of.
【００３５】[0035]
【実施例】以下、実施例に基づき、本発明を詳細に説明
する。EXAMPLES The present invention will be described in detail below based on examples.
【００３６】実施例１〜４（噴霧法）
３００ｃｃのビーカーに奈良県Ａ処理場の汚泥２００ｃ
ｃを分取し、凝集剤としてジメチルアミノエチルアクリ
レート４級塩の重合体（第一工業製薬（株）ハイセット
Ｃ２００Ｈ）を１０ｃｃ（０．２％水溶液品）添加後、
攪拌し、凝集物を得た。この凝集物を加圧プレス器にか
けて脱水ケーキ２０ｇを得た。この脱水ケーキに、表１
に示す組成で調製した脱臭剤をそれぞれ水で１０倍に希
釈したもの０．６ｃｃ（汚泥に対して３００ｐｐｍ）
を、空円錐ノズル（（株）霧のいけうち製、１／４ＭＫ
Ｂ８００７１Ｂ型、平均粒径４５〜６０μｍ）を使って
噴霧した。Examples 1 to 4 (spraying method) A 300 cc beaker and 200 c of sludge from the A treatment plant in Nara Prefecture
c was separated, and after adding 10 cc (0.2% aqueous solution) of a polymer of quaternary dimethylaminoethyl acrylate (Daiichi Kogyo Seiyaku Co., Ltd. Hiset C200H) as a coagulant,
Agitation was performed to obtain an aggregate. 20 g of dehydrated cake was obtained by applying this agglomerate to a pressure press. Add this dehydrated cake to Table 1.
0.6 cc (300 ppm for sludge) of deodorant prepared with the composition shown in Fig. 10 and diluted 10 times with water.
Is an empty cone nozzle (made by Kirino Ikeuchi Co., Ltd., 1/4 MK)
Sprayed using B80071B type, average particle size 45-60 μm).
【００３７】脱臭剤を噴霧した脱水ケーキをポリエチレ
ン瓶に入れ、室温に保存して発生する硫化水素とメチル
メルカプタンを検知管で測定した。結果を表２に示す。
ブランクとして、脱臭剤を噴霧しなかった脱水ケーキの
結果を示す。The dehydrated cake sprayed with the deodorant was placed in a polyethylene bottle and stored at room temperature, and the generated hydrogen sulfide and methyl mercaptan were measured with a detector tube. The results are shown in Table 2.
As a blank, the result of the dehydrated cake without spraying the deodorant is shown.
【００３８】実施例５〜８（噴霧法）
脱臭剤の噴霧量を０．５ｃｃ（汚泥に対して２５０ｐｐ
ｍ）としたほかは、実施例１〜４と同様に実験を行なっ
た。結果を表２に示す。Examples 5 to 8 (spraying method) The amount of deodorant sprayed was 0.5 cc (250 pp for sludge).
The experiment was performed in the same manner as in Examples 1 to 4 except that m) was used. The results are shown in Table 2.
【００３９】実施例９〜１２（噴霧法）
汚泥として、兵庫県Ｂ処理場の濃縮汚泥を用いたほか
は、実施例１〜４と同様に実験を行なった。結果を表３
に示す。Examples 9 to 12 (Spraying method) Experiments were carried out in the same manner as in Examples 1 to 4 except that concentrated sludge from the Hyogo Prefecture B treatment plant was used as sludge. The results are shown in Table 3.
Shown in.
【００４０】実施例１３および１４（噴霧法）
３００ｃｃのビーカーに兵庫県Ｂ処理場の濃縮汚泥２０
０ｃｃを分取し、凝集剤としてハイセットＣ２００Ｈ
（第一工業製薬（株））を１０ｃｃ（０．２％水溶液
品）添加後、攪拌し、凝集物を得た。この凝集物を加圧
プレス器にかけて脱水ケーキ２０ｇを得た。この脱水ケ
ーキに、表１に示す組成で調製した脱臭剤Ｂ（実施例１
３）または脱臭剤Ｄ（実施例１４）をそれぞれ水で１０
倍に希釈したもの０．６ｃｃ（汚泥に対して３００ｐｐ
ｍ）を、空円錐ノズル（（株）霧のいけうち製、１／４
ＭＫＢ８００７１Ｂ型、平均粒径４５〜６０μｍ）を使
って噴霧した。Examples 13 and 14 (Spraying method) A 300 cc beaker was added to a concentrated sludge 20 at the Hyogo Prefecture B treatment plant.
0 cc is collected, and as a flocculant, Hiset C200H
(Daiichi Kogyo Seiyaku Co., Ltd.) was added to 10 cc (0.2% aqueous solution) and then stirred to obtain an aggregate. 20 g of dehydrated cake was obtained by applying this agglomerate to a pressure press. To this dehydrated cake, deodorant B prepared in the composition shown in Table 1 (Example 1
3) or deodorant D (Example 14) 10 times each with water
Diluted twice 0.6cc (300pp for sludge
m) is an empty cone nozzle (made by Kirino Ikeuchi Co., Ltd., 1/4)
Sprayed using MKB 80071B type, average particle size 45-60 μm).
【００４１】脱臭剤を噴霧した脱水ケーキをポリエチレ
ン瓶に入れ、室温に保存して発生する硫化水素とメチル
メルカプタンを検知管で測定した。脱臭剤液滴の平均粒
径と脱臭効果の関係を調べた結果を表４に示す。The dehydrated cake sprayed with the deodorant was put in a polyethylene bottle and stored at room temperature, and the generated hydrogen sulfide and methyl mercaptan were measured with a detector tube. Table 4 shows the results of examining the relationship between the average particle size of the deodorant droplets and the deodorizing effect.
【００４２】比較例１〜４（汚泥添加法）
３００ｃｃのビーカーに奈良県Ａ処理場の汚泥２００ｃ
ｃを分取し、表１に示す組成で調製した脱臭剤をそれぞ
れ水で１０倍に希釈したもの０．６ｃｃ（汚泥に対して
３００ｐｐｍ）を添加した。つぎに凝集剤としてハイセ
ットＣ２００Ｈ（第一工業製薬（株））を１０ｃｃ
（０．２％水溶液品）添加後、撹拌し、凝集物を得た。
この凝集物を加圧プレス器にかけて脱水ケーキ２０ｇを
得た。Comparative Examples 1 to 4 (sludge addition method) A 300 cc beaker and 200 c of sludge from the A treatment plant in Nara Prefecture
c was sampled, and 0.6 cc (300 ppm with respect to sludge) obtained by diluting the deodorant prepared with the composition shown in Table 1 by 10 times with water was added. Next, as a flocculant, Hiset C200H (Daiichi Kogyo Seiyaku Co., Ltd.) was added at 10 cc
After adding (0.2% aqueous solution product), the mixture was stirred to obtain an aggregate.
20 g of dehydrated cake was obtained by applying this agglomerate to a pressure press.
【００４３】この脱水ケーキをポリエチレン瓶に入れ、
室温に保存して発生する硫化水素とメチルメルカプタン
を検知管で測定した。結果を表２に示す。Put this dehydrated cake in a polyethylene bottle,
Hydrogen sulfide and methyl mercaptan generated by storage at room temperature were measured with a detector tube. The results are shown in Table 2.
【００４４】比較例５〜８（汚泥添加法）
汚泥として、兵庫県Ｂ処理場の濃縮汚泥を用いたほか
は、比較例１〜４と同様に実験を行なった。結果を表３
および表４に示す。Comparative Examples 5 to 8 (Sludge Addition Method) Experiments were carried out in the same manner as Comparative Examples 1 to 4 except that concentrated sludge from the Hyogo Prefecture B treatment plant was used as sludge. The results are shown in Table 3.
And shown in Table 4.
【００４５】比較例９および１０（噴霧法）
３００ｃｃのビーカーに兵庫県Ｂ処理場の濃縮汚泥２０
０ｃｃを分取し、凝集剤としてハイセットＣ２００Ｈ
（第一工業製薬（株））を１０ｃｃ（０．２％水溶液
品）添加後、攪拌し、凝集物を得た。この凝集物を加圧
プレス器にかけて脱水ケーキ２０ｇを得た。脱水ケーキ
に、表１に示す組成で調製した脱臭剤Ｂ（比較例９）ま
たは脱臭剤Ｄ（比較例１０）をそれぞれ水で１０倍に希
釈したもの０．６ｃｃ（汚泥に対して３００ｐｐｍ）
を、注射器（平均粒径１１００〜１５００μｍ）を用い
て滴下した。Comparative Examples 9 and 10 (spraying method) A 300 cc beaker was placed in a concentrated sludge 20 at the Hyogo Prefecture B treatment plant.
0 cc is collected, and as a flocculant, Hiset C200H
(Daiichi Kogyo Seiyaku Co., Ltd.) was added to 10 cc (0.2% aqueous solution) and then stirred to obtain an aggregate. 20 g of dehydrated cake was obtained by applying this agglomerate to a pressure press. Dehydrated cake was prepared by diluting deodorant B (Comparative Example 9) or deodorant D (Comparative Example 10) with the composition shown in Table 1 10 times with water 0.6 cc (300 ppm relative to sludge)
Was dropped using a syringe (average particle size: 1100 to 1500 μm).
【００４６】脱臭剤を噴霧した脱水ケーキをポリエチレ
ン瓶に入れ、室温に保存して発生する硫化水素とメチル
メルカプタンを検知管で測定した。脱臭剤の液滴の平均
粒径と脱臭効果の関係を調べた結果を表４に示す。The dehydrated cake sprayed with the deodorant was placed in a polyethylene bottle and stored at room temperature, and the generated hydrogen sulfide and methyl mercaptan were measured with a detector tube. Table 4 shows the results of examining the relationship between the average particle size of the deodorant droplets and the deodorizing effect.
【００４７】実施例１５（噴霧法）
図１に示す処理工程にしたがって奈良県Ｂ処理場の汚泥
から得られる脱水ケーキの脱臭を行なった。汚泥を脱水
機１で脱水して、汚泥１００ｃｃあたり、１２．４ｇの
シート状の脱水ケーキ２を得た。得られたシート状の脱
水ケーキ２をベルトコンベヤー３で解砕機４に移送し、
長辺が３０ｍｍの塊状の脱水ケーキ５となるように解砕
したのち、ベルトコンベヤー６で移送した。塊状の脱水
ケーキ５を移送中、高位置のベルトコンベヤー６から低
位置のベルトコンベヤー７へ落下させ（落下距離５０ｃ
ｍ）、落下開始直後の脱水ケーキ５に対して０．２６重
量％（汚泥に対して３２７ｐｐｍ）の表１に示す脱臭剤
Ｂを噴霧ノズル８（空円錐ノズル、（株）霧のいけうち
製、１／４ＭＫＢ８００７１Ｂ型、平均粒径４５〜６０
μｍ）を用いて噴霧した。Example 15 (Spraying method) The dewatered cake obtained from the sludge of the Nara Prefecture B treatment plant was deodorized according to the treatment process shown in FIG. The sludge was dehydrated by the dehydrator 1 to obtain 12.4 g of sheet-shaped dehydrated cake 2 per 100 cc of sludge. The resulting sheet-shaped dehydrated cake 2 is transferred to the crusher 4 by the belt conveyor 3,
After being crushed into a block-shaped dehydrated cake 5 having a long side of 30 mm, it was transferred by a belt conveyor 6. During transfer of the block-shaped dehydrated cake 5, the belt conveyor 6 in the high position is dropped onto the belt conveyor 7 in the low position (falling distance 50c
m), 0.26 wt% (327 ppm with respect to sludge) of the deodorant B shown in Table 1 with respect to the dehydrated cake 5 immediately after the start of the dropping, the spray nozzle 8 (empty cone nozzle, manufactured by Kirino Ikeuchi Co., Ltd., 1/4 MKB 80071B type, average particle size 45 to 60
μm).
【００４８】脱臭剤を噴霧した脱水ケーキ５が、ベルト
コンベヤー７からケーキホッパー９に投入される直前
に、脱水ケーキ５を採取し、１００ｇを１Ｌのポリエチ
レン瓶に入れ、室温に保存して発生する硫化水素とメチ
ルメルカプタンを検知管で測定した。結果を表５に示
す。ブランクとして、脱臭剤を噴霧する前に採取した脱
水ケーキ１００ｇを１Ｌのポリエチレン瓶に入れ、室温
に保存して発生する硫化水素とメチルメルカプタンを検
知管で測定した結果を示す。Immediately before the dehydrated cake 5 sprayed with the deodorant is put into the cake hopper 9 from the belt conveyor 7, the dehydrated cake 5 is collected and 100 g is put in a 1 L polyethylene bottle and stored at room temperature to generate. Hydrogen sulfide and methyl mercaptan were measured with a detector tube. The results are shown in Table 5. As a blank, 100 g of the dehydrated cake collected before spraying the deodorant was put in a 1 L polyethylene bottle and stored at room temperature, and the generated hydrogen sulfide and methyl mercaptan were measured with a detector tube.
【００４９】[0049]
【表１】 [Table 1]
【００５０】[0050]
【表２】 [Table 2]
【００５１】[0051]
【表３】 [Table 3]
【００５２】[0052]
【表４】 [Table 4]
【００５３】[0053]
【表５】 [Table 5]
【００５４】表２〜５中、ＭＭはメチルメルカプタンを
示す。In Tables 2 to 5, MM represents methyl mercaptan.
【００５５】表２より、汚泥２００ｃｃあたり脱臭剤を
０．６ｃｃ使用した場合、脱臭剤を脱水ケーキに噴霧し
た実施例１〜４では、脱臭効果が７２時間持続したが、
脱臭剤を汚泥に添加した比較例１〜４では、７２時間後
に悪臭の原因となる硫化水素とメチルメルカプタンが検
出されたことがわかる。また、脱臭剤を０．５ｃｃ使用
した実施例５〜８でも、脱臭剤を０．６ｃｃ使用した比
較例１〜４よりも優れた脱臭効果が達成されたことがわ
かる。From Table 2, when 0.6 cc of the deodorant was used per 200 cc of sludge, in Examples 1 to 4 in which the deodorant was sprayed on the dehydrated cake, the deodorizing effect was maintained for 72 hours.
In Comparative Examples 1 to 4 in which the deodorant was added to the sludge, it can be seen that hydrogen sulfide and methyl mercaptan, which cause an offensive odor, were detected after 72 hours. Further, it can be seen that even in Examples 5 to 8 in which 0.5 cc of the deodorant was used, the deodorizing effect superior to that in Comparative Examples 1 to 4 in which the deodorant of 0.6 cc was used was achieved.
【００５６】表３より、種類の異なる汚泥の脱水ケーキ
に対しても、脱臭剤を脱水ケーキに噴霧した実施例９〜
１２では、汚泥に脱臭剤を添加した比較例５〜８より
も、優れた脱臭効果（持続性）が達成されたことがわか
る。From Table 3, Examples 9 to 9 in which the deodorant was sprayed on the dehydrated cakes of different types of sludge
In No. 12, it can be seen that an excellent deodorizing effect (persistence) was achieved as compared with Comparative Examples 5 to 8 in which a deodorant was added to sludge.
【００５７】表４より、脱臭剤の噴霧液滴の平均粒径が
４５〜６０μｍの実施例１３および１４では、平均粒径
が１１００〜１５００μｍの比較例９および１０より
も、優れた脱臭効果（持続性）が達成されたことがわか
る。From Table 4, in Examples 13 and 14 in which the average particle size of the deodorant spray droplets is 45 to 60 μm, the deodorizing effect superior to that of Comparative Examples 9 and 10 in which the average particle size is 1100 to 1500 μm ( It can be seen that sustainability was achieved.
【００５８】表５より、脱水ケーキのベルトコンベヤー
移送時に脱臭剤を噴霧した実施例１５においても、実施
例１〜１４と同様に優れた脱臭効果（持続性）が達成さ
れたことがわかる。From Table 5, it can be seen that also in Example 15 in which the deodorant was sprayed when the dehydrated cake was conveyed on the belt conveyor, the excellent deodorizing effect (persistence) was achieved as in Examples 1 to 14.
【００５９】[0059]
【発明の効果】本発明の脱水ケーキの脱臭方法は、脱水
ケーキへ特定の液滴粒径を有する脱臭剤を噴霧するの
で、汚泥に脱臭剤を添加したのち脱水して脱水ケーキを
得る従来技術と比較して、脱水による脱臭剤の流出がな
く、少量の脱臭剤で同一時間脱臭効果を持続させること
ができる。EFFECTS OF THE INVENTION Since the deodorizing method of the dehydrated cake of the present invention sprays the deodorant having a specific droplet size on the dehydrated cake, the dehydrated cake is obtained by adding the deodorant to the sludge and then dehydrating it. Compared with the above, there is no outflow of the deodorant due to dehydration, and the deodorizing effect can be maintained for the same time with a small amount of deodorant.
【００６０】本発明においては、ナトリウム以外の重金
属が含まれない脱臭剤を用いることにより、脱臭剤を噴
霧した脱水ケーキをセメントの骨材や肥料として有効に
再利用することができる。In the present invention, by using a deodorant containing no heavy metal other than sodium, the dehydrated cake sprayed with the deodorant can be effectively reused as an aggregate or fertilizer for cement.
【００６１】本発明においては、脱水ケーキを移送中に
落下させ、落下中の脱水ケーキに脱臭剤を噴霧するこ
と、とくに落下開始直後の脱水ケーキに脱臭剤を噴霧す
ることにより、脱水ケーキに脱臭剤を均一に吸着させ
て、少量の脱臭剤で効率よく脱臭することができる。In the present invention, the dewatered cake is dropped while being transferred, and the deodorizing agent is sprayed on the falling dewatering cake, and in particular, the deodorizing agent is sprayed on the dehydrated cake immediately after the start of the falling to deodorize the dehydrated cake. The agent can be adsorbed uniformly and deodorized efficiently with a small amount of deodorant.
【００６２】本発明においては、解砕機で解砕した脱水
ケーキに脱臭剤を噴霧すること、とくに脱水ケーキの長
辺を１０〜５０ｍｍとすることにより、脱臭剤の噴霧を
脱水ケーキ全面に行ないやすくし、効率よく脱臭するこ
とができる。In the present invention, the deodorant is sprayed on the dehydrated cake crushed by the disintegrator, and in particular, by setting the long side of the dehydrated cake to be 10 to 50 mm, it is easy to spray the deodorant on the entire surface of the dehydrated cake. And can efficiently deodorize.
【図１】本発明の脱臭方法の一実施の形態の処理工程を
示す概略図である。FIG. 1 is a schematic view showing a processing step of an embodiment of a deodorizing method of the present invention.
１ 脱水機 ２ シート状の脱水ケーキ ３、６、７ ベルトコンベヤー ４ 解砕機 ５ 塊状の脱水ケーキ ８ 噴霧ノズル ９ ケーキホッパー 1 dehydrator 2 sheets of dehydrated cake 3, 6, 7 belt conveyor 4 crusher 5 massive dehydrated cake 8 spray nozzles 9 cake hopper
Claims (6)
水ケーキの脱臭方法であって、噴霧する脱臭剤の液滴の
粒径が１０００μｍ以下であることを特徴とする脱水ケ
ーキの脱臭方法。1. A deodorizing method for a dehydrated cake, which comprises spraying a deodorant on a dehydrated cake of sludge, wherein the droplet size of the sprayed deodorant is 1000 μm or less.
含み、ナトリウム以外の金属を含まない脱臭剤である請
求項１記載の脱臭方法。2. The deodorizing method according to claim 1, wherein the deodorizing agent to be sprayed is a deodorizing agent containing nitrite and a bactericide and containing no metal other than sodium.
の脱水ケーキに脱臭剤を噴霧する請求項１または２記載
の脱臭方法。3. The deodorizing method according to claim 1, wherein the dehydrated cake is dropped during transfer, and the deodorant is sprayed onto the falling dehydrated cake.
始直後の脱水ケーキに脱臭剤を噴霧する請求項１、２ま
たは３記載の脱臭方法。4. The deodorizing method according to claim 1, 2 or 3, wherein the dehydrated cake is dropped during transfer, and the deodorant is sprayed on the dehydrated cake immediately after the start of falling.
噴霧する請求項１、２、３または４記載の脱臭方法。5. The deodorizing method according to claim 1, 2, 3 or 4, wherein a deodorant is sprayed on the dehydrated cake crushed by a crusher.
０〜５０ｍｍである請求項１、２、３、４または５記載
の脱臭方法。6. The long side of the dehydrated cake sprayed with a deodorant is 1
The deodorizing method according to claim 1, 2, 3, 4, or 5, which has a length of 0 to 50 mm.
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|---|---|---|---|
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005169266A (en) * | 2003-12-11 | 2005-06-30 | Kurita Water Ind Ltd | Offensive smell inhibitor of sludge slurry or sludge dehydrated cake |
| JP2006075704A (en) * | 2004-09-08 | 2006-03-23 | Asahi Kasei Chemicals Corp | Deodorant and deodorization method |
| CN108383173A (en) * | 2018-01-30 | 2018-08-10 | 广西匠仪市政工程有限公司 | A kind of plant type micro emulsion deodorant of refuse landfill and preparation method thereof |
-
2002
- 2002-02-26 JP JP2002049694A patent/JP3654869B2/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005169266A (en) * | 2003-12-11 | 2005-06-30 | Kurita Water Ind Ltd | Offensive smell inhibitor of sludge slurry or sludge dehydrated cake |
| JP2006075704A (en) * | 2004-09-08 | 2006-03-23 | Asahi Kasei Chemicals Corp | Deodorant and deodorization method |
| JP4652753B2 (en) * | 2004-09-08 | 2011-03-16 | 旭化成ケミカルズ株式会社 | Deodorant and method |
| CN108383173A (en) * | 2018-01-30 | 2018-08-10 | 广西匠仪市政工程有限公司 | A kind of plant type micro emulsion deodorant of refuse landfill and preparation method thereof |
| CN108383173B (en) * | 2018-01-30 | 2021-03-12 | 广西匠仪市政工程有限公司 | Plant type microemulsion deodorant for refuse landfill and preparation method thereof |
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| JP3654869B2 (en) | 2005-06-02 |
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