JPS6352000A - Method for dehydrating excess sludge - Google Patents
Method for dehydrating excess sludgeInfo
- Publication number
- JPS6352000A JPS6352000A JP61194982A JP19498286A JPS6352000A JP S6352000 A JPS6352000 A JP S6352000A JP 61194982 A JP61194982 A JP 61194982A JP 19498286 A JP19498286 A JP 19498286A JP S6352000 A JPS6352000 A JP S6352000A
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- storage tank
- iron salt
- iron
- stored
- 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.)
- Pending
Links
- 239000010802 sludge Substances 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims description 11
- 229920000642 polymer Polymers 0.000 claims abstract description 16
- 150000002505 iron Chemical class 0.000 claims abstract description 15
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims abstract description 10
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910000037 hydrogen sulfide Inorganic materials 0.000 claims abstract description 7
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 7
- 239000011593 sulfur Substances 0.000 claims abstract description 7
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000007789 gas Substances 0.000 claims description 9
- 230000001877 deodorizing effect Effects 0.000 claims description 7
- 239000002351 wastewater Substances 0.000 claims description 5
- 238000005273 aeration Methods 0.000 abstract description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 abstract description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract description 5
- 239000000203 mixture Substances 0.000 abstract 2
- 229910021578 Iron(III) chloride Inorganic materials 0.000 abstract 1
- 235000003891 ferrous sulphate Nutrition 0.000 abstract 1
- 239000011790 ferrous sulphate Substances 0.000 abstract 1
- 239000008394 flocculating agent Substances 0.000 abstract 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 abstract 1
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 abstract 1
- 229910000359 iron(II) sulfate Inorganic materials 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 6
- 238000005189 flocculation Methods 0.000 description 4
- 230000016615 flocculation Effects 0.000 description 4
- 230000003311 flocculating effect Effects 0.000 description 3
- 159000000014 iron salts Chemical class 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000004332 deodorization Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000010800 human waste Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000011218 seed culture Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、高濃度有機廃水の活性汚泥処理工程で発生す
る余剰汚泥を貯留槽に貯留し、前記針Ｍ［において発生
する硫化水素を含む臭気ガスを脱臭装置で脱臭し、貯留
した余剰汚泥に高分子凝集剤を混合して凝集させた後脱
水する余剰汚泥の脱水方法に関する。Detailed Description of the Invention [Industrial Application Field] The present invention stores surplus sludge generated in an activated sludge treatment process of highly concentrated organic wastewater in a storage tank, The present invention relates to a method for dewatering surplus sludge, in which odor gas is deodorized by a deodorizing device, and the stored surplus sludge is mixed with a polymer flocculant to coagulate and then dehydrated.
従来、上記脱水方法では、余剰汚泥の腐敗を防止するた
めに貯留槽に空！ｌを吹き込んで攪拌しているだけであ
った。Conventionally, in the above dewatering method, the storage tank is empty to prevent excess sludge from rotting. 1 was simply blown in and stirred.
しかし、余剰汚泥は極めて腐敗しヤすいために、貯留槽
に空気を吹き込むだけでは腐敗を防止することはできず
、そのために腐敗によって多量の硫化水素が発生し、脱
臭装置を大型化きせなければ脱臭処理を行なうことがで
きなくなる危険性がめった。However, excess sludge is extremely susceptible to putrefaction, so simply blowing air into the storage tank cannot prevent the putrefaction.As a result, a large amount of hydrogen sulfide is generated due to the putrefaction, and the deodorization equipment must be enlarged. There was a risk that deodorizing treatment would not be possible.
本発明の目的は、硫化水素の発生を抑制できるようにす
る点にある。An object of the present invention is to suppress the generation of hydrogen sulfide.
本発明における余剰汚泥の脱水方法の特徴手段社、鉄塩
を汚泥ＶＣ添加して、その鉄塩と汚泥中のイオウ分とを
貯留槽で反Ｆ３させて、イオウ分を硫化鉄Ｖこし、前記
鉄塩の添加量を、高分子凝集剤貯留槽の汚泥がｐ）ｉｊ
以上になるように調節することに６す、その作用効果は
、次の通シである。Features of the method for dewatering excess sludge in the present invention: Iron salt is added to the sludge VC, the iron salt and sulfur content in the sludge are separated in a storage tank, and the sulfur content is filtered through the iron sulfide V. The amount of iron salt added to the sludge in the polymer flocculant storage tank is
The effects of the above adjustment are as follows.
つまり、余剰汚泥が腐敗し九としても、汚泥中のイオウ
分が鉄塩と貯ｖｉＩ檜で反応して硫化鉄になるために、
汚泥中から臭気ガスとしての硫化水素ガスが発生しにく
くなり、しかも、汚泥のｐＨが！以下では高分子凝集剤
による凝集操作が悪化するのに対し、高分子凝集剤混仕
前の汚泥がｐＨｊ以上になるように、鉄塩の添加量を＃
□を節することによって、凝集性を良好にｍ持できるは
かりか、汚泥に対する鉄塩の添加によって、高分子凝集
剤による凝集の前処理が行われ、全体としての凝集効果
を上げられる。In other words, even if excess sludge rots, the sulfur content in the sludge reacts with iron salts in the storage viI hinoki to form iron sulfide.
Hydrogen sulfide gas as an odor gas is less likely to be generated from the sludge, and the pH of the sludge is also improved! In the following, the amount of iron salt added is adjusted so that the sludge before mixing with the polymer flocculant becomes pHj or higher, whereas the flocculation operation using the polymer flocculant deteriorates.
By setting □, the flocculating effect can be improved as a whole by using a scale that can maintain good flocculating properties, and by adding iron salt to the sludge, pre-treatment for flocculating with a polymer flocculant is performed.
従って、汚泥より発生する硫化水素ガスｔ！Ｘり途くた
めの特別な設備や脱臭装置を大型化することなく、鉄塩
を添加するたけて既存の設備を有効利用して脱臭を行な
うことができ、しかも、その鉄塩によって汚泥の凝集を
効果的に行ないながら脱水効率を向上ａせることかでき
、全体として装置の小型化及び狡備費のコストグクンを
可能にさせるに至った。Therefore, hydrogen sulfide gas generated from sludge t! By adding iron salts, existing equipment can be used effectively for deodorization without increasing the size of special equipment or deodorizing equipment. The dewatering efficiency can be improved while effectively carrying out this process, and the overall size of the equipment and equipment costs can be reduced.
次に、不発例の実施例を、図面に基づいて説明する。 Next, an example of a non-occurrence case will be described based on the drawings.
図面に示すように、原水路１１１からのし尿等の高濃度
有機廃水を曝気槽（２）に供給し、ブロアー（９）と散
気共（２鳳うにより曝気槽ｔ２＋内に突気を吹き込んで
、有機性廃水を活性汚泥で処理し、曝気槽（２）からの
処理水を流路（３）を通って固液分離装置（４）に供給
し、分ｍされた活性汚泥は返送汚泥路（５）を通って＠
気槽（２）に戻さｎると共に、固液分離装置（４）から
の処理水は、放流路（８）に送る。As shown in the drawing, highly concentrated organic wastewater such as human waste from the raw waterway 111 is supplied to the aeration tank (2), and a blower (9) and diffuser (2) blow a rush of air into the aeration tank t2+. The organic wastewater is treated with activated sludge, and the treated water from the aeration tank (2) is supplied to the solid-liquid separator (4) through the flow path (3), and the separated activated sludge is returned as sludge. Through road (5) @
The treated water from the solid-liquid separator (4) is returned to the gas tank (2) and sent to the discharge channel (8).
上記高濃度有機廃水の活性汚泥処理工程で発生する余剰
汚泥を、引抜き流路（６）によってｍ気槽ｔ２１から引
抜き、鉄塩貯留槽（９）に貯留しである硫酸第１鉄（Ｆ
ｅ２ＳＯ４）又は塩化％２ ＆（ＦｅＣ１，）等の鉄塩
を、ポンプ（Ｐ）によって鉄塩混合装置（７）に注入し
て、前記引抜いた余剰汚泥に添加混合し、汚泥貯留槽（
１１に貯留する。 そして、汚泥貯留種菌では、余剰汚
泥の濃度均一化と腐敗防止の丸めにブロアー５３１によ
って空気を吹き込んで攪拌していると共に、汚泥中のイ
オウ分と、添加した鉄塩（Ｆｅ２ＳＯ４又はＦｅＣ１３
）とを１時間以上反応させて硫化鉄（Ｆｅ２Ｓ）と硫酸
（ＨｚＳＯＪ又は塩酸（ＨＣｌ）にして、汚泥の腐敗に
よる硫化水素（Ｈ２Ｓ）の発生を抑制してあり、汚泥貯
留槽（ｌυ）がら発生する硫化水素（Ｈ２Ｓ）を含む臭
気ガスは、臭気ガス捕集絡端によって脱臭装置！０ηに
供給し、脱臭装置１ｔｆＪ・ηで燃焼脱臭又は活性炭に
よる吸着脱臭を行なったガスは、排気ダクトＱｌｔ−介
して放出される。Excess sludge generated in the activated sludge treatment process of the high-concentration organic wastewater is extracted from the m-air tank t21 through the extraction channel (6), and is stored in the iron salt storage tank (9).
Iron salts such as e2SO4) or chloride%2&(FeC1,) are injected into the iron salt mixing device (7) by the pump (P), added to and mixed with the extracted surplus sludge, and then added to the sludge storage tank (
11. In the sludge storage seed culture, air is blown into the sludge by a blower 531 to uniformize the concentration of the surplus sludge and prevent it from rotting.
) is reacted for over 1 hour to form iron sulfide (Fe2S) and sulfuric acid (HzSOJ or hydrochloric acid (HCl)) to suppress the generation of hydrogen sulfide (H2S) due to decay of sludge. The generated odorous gas containing hydrogen sulfide (H2S) is supplied to the deodorizing device !0η by the odorous gas collecting end, and the gas that has been deodorized by combustion or adsorption with activated carbon in the deodorizing device 1tfJ・η is sent to the exhaust duct Qlt. - released through.
前記汚泥貯留槽（ＩＬｌｌからの汚泥が、汚泥供給路（
１１）を介して定量づつ脱水機Ｑ５）に供給する途中で
、高分子凝集剤貯留槽Ｑ４）、からポンプ（Ｐ）によっ
て供給される高分子凝集剤と、混合される高分子凝集剤
混合装置（１′！Ｉを設けてあり、この高分子凝集剤混
合装置ａｉｔ＋ａによって汚泥が凝ｉさせられ、脱水機
９＠による脱水効率を上げている。The sludge from the sludge storage tank (ILll) is transferred to the sludge supply channel (
A polymer flocculant mixing device where the polymer flocculant is mixed with the polymer flocculant supplied by the pump (P) from the polymer flocculant storage tank Q4) while being supplied quantitatively to the dehydrator Q5) via the polymer flocculant storage tank Q4). (1'!I is provided, and the sludge is coagulated by this polymer flocculant mixing device ait+a, increasing the dewatering efficiency by the dehydrator 9@.
尚、前記汚泥貯留槽（ｌｕｌｌで汚泥と反応させるため
の鉄塩の添加量は、汚泥の腐敗により発生する硫化水素
（Ｈ２Ｓ）に見合う量にすればよく、過剰にするほど必
要反応時間が短かくなると共に、高分子凝集剤による凝
集の６ｔＩ処理が行われて凝集効率を高められるが、生
成する酸（Ｈ２ＳＯ４又はＨＣＩ）によって汚泥のｐＨ
が下がり、 ｐＨがＪ以下になると、高分子凝集剤によ
る凝集・風が低下する丸めに、余剰汚泥の固形物当りＦ
ｅとして７〜５ｗｔ１を添加して、汚泥のｐＨが５以上
、望ましくは４以上になるように添加量を調節する。The amount of iron salt added to react with the sludge in the sludge storage tank (lull) may be adjusted to the amount corresponding to the amount of hydrogen sulfide (H2S) generated by the decay of the sludge. At the same time, 6tI treatment of flocculation with a polymer flocculant is performed to increase flocculation efficiency, but the acid (H2SO4 or HCI) produced lowers the pH of the sludge.
When the pH decreases and the pH becomes below J, the flocculation and airflow by the polymer flocculant decreases.
7 to 5wt1 is added as e, and the amount added is adjusted so that the pH of the sludge becomes 5 or more, preferably 4 or more.
前記脱水機（ホ）では、脱水汚泥が排出路１１３１から
排出されると共に、脱水ｐ液がＰ液槽四に貯留され、定
量づつ脱水ｐ液流路（ＩＱを介して曝気槽（２）に返送
される。In the dehydrator (e), dehydrated sludge is discharged from the discharge path 1131, and dehydrated p-liquid is stored in the p-liquid tank 4, and is quantitatively sent to the aeration tank (2) via the dehydrated p-liquid channel (IQ). It will be sent back.
前記余剰汚泥の引抜きは、曝気槽１，２）刀・ら行なう
以外に、固液分離装＠（４）から引抜いても良い。The excess sludge may be extracted from the solid-liquid separator (4) in addition to the aeration tanks 1 and 2).
前記鉄塩混合装置（７１（＋−省略して、４気槽（２１
又は汚泥貯留槽１ｔＵｌにｖｉ接秋塩を供給しても良い
。The iron salt mixing device (71 (+- omitted, 4-air tank (21
Alternatively, vi-grafted salt may be supplied to 1 tUl of the sludge storage tank.
前記曝気槽（２）から引抜いた汚泥を、汚泥貯留槽１ｉ
ＬＩｌに供給する前（て瀬紬楢によって濃縮しても良い
。The sludge pulled out from the aeration tank (2) is transferred to the sludge storage tank 1i.
Before supplying to the LIl, it may be concentrated using a Tese Tsumugi Na.
図面は本）６町に俸る余剰汚泥の脱水方法の実施例を示
すフローシートである。
ＵＵ＋・・・・・・貯留槽、＋１７１・・・・・・脱臭
装置。The drawing is a flow sheet showing an example of a method for dewatering excess sludge distributed to six towns. UU+...Storage tank, +171...Deodorizing device.
Claims (1)
を貯留槽（１０）に貯留し、前記貯留槽（１０）におい
て発生する硫化水素を含む臭気ガスを脱臭装置（１７）
で脱臭し、貯留した余剰汚泥に高分子凝集剤を混合して
凝集させた後脱水する余剰汚泥の脱水方法であつて、鉄
塩を汚泥に添加して、その鉄塩と汚泥中のイオウ分とを
前記貯留槽（１０）で反応させて、イオウ分を硫化鉄に
し、前記鉄塩の添加量を、高分子凝集剤混合前の汚泥が
ｐＨ５以上になるように調節する余剰汚泥の脱水方法。Surplus sludge generated in the activated sludge treatment process for highly concentrated organic wastewater is stored in a storage tank (10), and odor gas containing hydrogen sulfide generated in the storage tank (10) is removed by a deodorizing device (17).
This is a dewatering method for surplus sludge, in which the surplus sludge is deodorized and stored, mixed with a polymer flocculant, flocculated, and then dehydrated. A method for dewatering excess sludge, which comprises reacting the sulfur with iron sulfide in the storage tank (10) to convert the sulfur content into iron sulfide, and adjusting the amount of the iron salt added so that the sludge has a pH of 5 or more before mixing with the polymer flocculant. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61194982A JPS6352000A (en) | 1986-08-20 | 1986-08-20 | Method for dehydrating excess sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61194982A JPS6352000A (en) | 1986-08-20 | 1986-08-20 | Method for dehydrating excess sludge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6352000A true JPS6352000A (en) | 1988-03-05 |
Family
ID=16333572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61194982A Pending JPS6352000A (en) | 1986-08-20 | 1986-08-20 | Method for dehydrating excess sludge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6352000A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104098165A (en) * | 2014-07-29 | 2014-10-15 | 徐锁龙 | Preparation method and preparation equipment for composite polyiron water purifying agent |
| CN104386862A (en) * | 2014-12-05 | 2015-03-04 | 天津工业大学 | Method for treating wastewater of slaughter plant |
| JP2018001137A (en) * | 2016-07-07 | 2018-01-11 | 水ｉｎｇ株式会社 | Treatment method and treatment device of organic sludge |
-
1986
- 1986-08-20 JP JP61194982A patent/JPS6352000A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104098165A (en) * | 2014-07-29 | 2014-10-15 | 徐锁龙 | Preparation method and preparation equipment for composite polyiron water purifying agent |
| CN104386862A (en) * | 2014-12-05 | 2015-03-04 | 天津工业大学 | Method for treating wastewater of slaughter plant |
| JP2018001137A (en) * | 2016-07-07 | 2018-01-11 | 水ｉｎｇ株式会社 | Treatment method and treatment device of organic sludge |
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