JPS6345637B2 - - Google Patents
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- Publication number
- JPS6345637B2 JPS6345637B2 JP58207529A JP20752983A JPS6345637B2 JP S6345637 B2 JPS6345637 B2 JP S6345637B2 JP 58207529 A JP58207529 A JP 58207529A JP 20752983 A JP20752983 A JP 20752983A JP S6345637 B2 JPS6345637 B2 JP S6345637B2
- Authority
- JP
- Japan
- Prior art keywords
- aeration
- air
- water
- sludge
- drying
- 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
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- Drying Of Solid Materials (AREA)
- Treatment Of Sludge (AREA)
Description
【発明の詳細な説明】
本発明は、し尿、下水、各産業廃水などの有機
性汚水、有機性汚泥などの処理において発生する
し渣、余剰汚泥、凝集沈殿汚泥等の含水固形物の
省エネルギー的な乾燥方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention provides energy-saving treatment for water-containing solids such as sludge, excess sludge, and coagulated sedimentation sludge generated in the treatment of organic wastewater such as human waste, sewage, and various industrial wastewater, and organic sludge. It relates to a drying method.
従来、有機性汚水や汚泥の処理において発生す
る含水固形物は、各種の機械脱水機で脱水される
が、そのままでは含水率がまだ高いため、焼却は
勿論のこと、コンポスト化や埋立処分を行うに大
きな不都合がある。 Conventionally, the water-containing solids generated during the treatment of organic sewage and sludge are dehydrated using various mechanical dehydrators, but since the water content is still high, they are not only incinerated but also composted or disposed of in landfills. There is a big inconvenience.
したがつて、これらの含水固形物は各種の乾燥
法によつて乾燥する必要があり、多量の有価燃
料、電気を消費せざるを得なかつた。 Therefore, these water-containing solids must be dried by various drying methods, necessitating the consumption of large amounts of valuable fuel and electricity.
さらに、乾燥工程からは悪臭ガスが排出され、
脱臭のために特別の脱臭設備と経費を必要として
いた。 Furthermore, the drying process releases foul-smelling gases.
Special deodorization equipment and expense were required for deodorization.
一方、有機性汚水の生物処理や有機性汚泥の好
気性消化処理などにおいて、最もエネルギーを消
費するのは曝気ブロワである。しかしながら、従
来、曝気ブロワは単にエアレーシヨンという単一
の機能しか発揮されておらず、このことは当然の
ことと認識されていて、曝気ブロワに複合機能を
付与するという技術思想は全くみられなかつた。 On the other hand, in biological treatment of organic sewage and aerobic digestion of organic sludge, the aeration blower consumes the most energy. However, in the past, aeration blowers only performed a single function, aeration, and this was taken for granted, and there was no technical idea to give aeration blowers multiple functions. .
本発明は、従来全く顧みられなかつた曝気ブロ
ワのエネルギーに着目して完成されたものであ
る。すなわち、曝気ブロワは空気圧縮機であるか
ら、熱力学における気体の断熱圧縮理論に示され
るように、曝気ブロワ吐出空気の温度は吸入空気
の温度よりも著しく上昇し、大気温度が10〜20℃
の場合の曝気ブロワ吐出空気の温度は80〜100℃
にも達することに着目して本発明が完成されたも
のである。 The present invention was completed by focusing on the energy of an aeration blower, which has not been considered at all in the past. In other words, since the aeration blower is an air compressor, as shown in the adiabatic compression theory of gases in thermodynamics, the temperature of the aeration blower discharge air is significantly higher than the temperature of the intake air, and the atmospheric temperature is 10 to 20 degrees Celsius.
The temperature of the aeration blower discharge air is 80~100℃
The present invention was completed by paying attention to the fact that it also achieves the following.
本発明は、有機性汚水の生物処理や有機性汚泥
の好気性消化などで使用される曝気ブロワに複合
機能をもたせることによつて、前述した従来の乾
燥法の諸問題を一挙に解決することを可能にする
きわめて省エネルギー的な含水固形物の乾燥方法
を提供することを目的とするものである。 The present invention solves all the problems of the conventional drying method described above by providing multiple functions to an aeration blower used for biological treatment of organic sewage and aerobic digestion of organic sludge. The purpose of the present invention is to provide an extremely energy-saving method for drying water-containing solids that enables drying of water-containing solids.
本発明は、有機水汚水、有機性汚泥などの処理
において発生する含水固形物を乾燥するに際し、
前記処理における曝気工程に使用する曝気ブロワ
の吐出空気及び又は吸入空気を任意の熱源により
加熱して得た高温の曝気ブロワ吐出空気を、前記
含水固形物と直接接触させたのち、発生する悪臭
と共に前記曝気工程へ供給することを特徴とする
ものである。 The present invention provides the following advantages when drying water-containing solids generated in the treatment of organic water sewage, organic sludge, etc.
After the high-temperature aeration blower discharge air obtained by heating the discharge air and/or intake air of the aeration blower used in the aeration step in the treatment with an arbitrary heat source is brought into direct contact with the water-containing solids, together with the odor generated. It is characterized in that it is supplied to the aeration process.
さらに本発明の一実施態様を、し尿処理を例に
とり、図面を参照しながら説明すれば次の通りで
ある。 Further, one embodiment of the present invention will be described below with reference to the drawings, taking human waste treatment as an example.
し尿１は第１撹拌槽２に導入され、ここで次の
曝気槽３から循環ポンフ４などで返送される硝化
液及び後述する返送汚泥９とともに撹拌されたの
ち曝気槽３に至り、散気装置５から供給される空
気によつて硝化が行われ、次いで第２撹拌槽６で
脱窒素され、固液分離機７で固液分離されて生物
処理水８を得る一方、分離された活性汚泥の一部
は返送汚泥９として前記の第１撹拌槽２に返送さ
れ、他部は余剰活性汚泥１０となる。この処理プ
ロセスは、いわゆる生物学的硝化脱窒素プロセス
として多用されているものである。 The human waste 1 is introduced into the first stirring tank 2, where it is stirred together with the nitrification liquid returned from the next aeration tank 3 by a circulation pump 4, etc., and the return sludge 9, which will be described later. Nitrification is performed by the air supplied from 5, followed by denitrification in the second stirring tank 6, and solid-liquid separation in the solid-liquid separator 7 to obtain biologically treated water 8. A portion is returned to the first stirring tank 2 as return sludge 9, and the other portion becomes surplus activated sludge 10. This treatment process is frequently used as a so-called biological nitrification and denitrification process.
しかして、前記余剰活性汚泥１０と、前記生物
処理水８の高温処理のための凝集沈殿処理から排
出される凝集沈殿汚泥１１やし渣その他処理系内
に発生する含水固形物は、ベルトプレス、フイル
タプレス、スクリユープレス、遠心脱水機その他
の機械脱水機１２によつて含水率70〜85％程度の
脱水ケーキ１３となり、この脱水ケーキ１３は密
閉型の乾燥器１４に供給されて層を形成する。 Therefore, the surplus activated sludge 10, coagulated sedimentation sludge 11 discharged from the coagulation sedimentation treatment for high-temperature treatment of the biologically treated water 8, palm sludge and other water-containing solids generated in the treatment system are removed by a belt press, A dehydrated cake 13 with a moisture content of about 70 to 85% is produced by a mechanical dehydrator 12 such as a filter press, screw press, centrifugal dehydrator, etc., and this dehydrated cake 13 is supplied to a closed dryer 14 to form a layer. do.
一方、前記の曝気槽３内に散気装置５から空気
を供給するための曝気ブロワ１５の吐出空気１６
は、気体の断熱圧縮によつて80〜100℃の温度を
もつが、これを電熱、高周波誘導加熱、燃料、排
ガスなど任意の熱源１７でさらに加熱し、100〜
150℃程度の熱風１８として前記乾燥器１４内に
供給し、脱水ケーキ１３に直接接触させて熱移動
せしめて乾燥し、得られた乾燥物１９は、自燃焼
却、燃料化、ガス化、コンポストその他の肥料
化、埋立などの任意の方法で有効利用又は処分さ
れる。 On the other hand, the discharge air 16 of the aeration blower 15 for supplying air from the aeration device 5 into the aeration tank 3 is
has a temperature of 80 to 100 degrees Celsius due to adiabatic compression of gas, but it can be further heated with any heat source 17 such as electric heat, high-frequency induction heating, fuel, exhaust gas, etc.
It is supplied into the dryer 14 as hot air 18 at about 150°C, and is brought into direct contact with the dehydrated cake 13 to transfer heat and dry. It can be effectively used or disposed of by any method such as turning into fertilizer or landfilling.
なお、前記実施態様において、曝気ブロワ１５
の吐出空気１６を加熱して乾燥器１４内に供給す
るものであるが、曝気ブロワ１５の吸入空気２０
をあらかじめ任意の熱源で加熱してから曝気ブロ
ワ１５で断熱圧縮して熱風１８を得てもよく、ま
た、吐出空気１６及び吸入空気２０の両者を加熱
するようにしてもよいことはいうまでもない。 In addition, in the embodiment, the aeration blower 15
The discharge air 16 of the aeration blower 15 is heated and supplied into the dryer 14, but the intake air 20 of the aeration blower 15 is
It goes without saying that the hot air 18 may be obtained by heating the air in advance with an arbitrary heat source and then adiabatically compressing it with the aeration blower 15, or heating both the discharge air 16 and the intake air 20. do not have.
このようにして曝気ブロワ１５から吐出された
熱風１８は、脱水ケーキ１３の乾燥に利用された
のち流出空気２１となつて乾燥時に発生した悪臭
成分とともに乾燥器１４から流出し、前記曝気槽
３内に曝気用空気として散気装置５を経て供給さ
れ、曝気槽３内で硝化作用が行われると同時に同
伴された悪臭成分は活性汚泥などの微生物によつ
て生物学的に脱臭される。 The hot air 18 discharged from the aeration blower 15 in this manner is used for drying the dehydrated cake 13 and then becomes outflow air 21 which flows out of the dryer 14 together with the malodorous components generated during drying, and enters the aeration tank 3. is supplied as aeration air through an aeration device 5, and nitrification is performed in the aeration tank 3. At the same time, the accompanying malodorous components are biologically deodorized by microorganisms such as activated sludge.
また、乾燥器１４から流出する流出空気２１中
には、乾燥時に発生したダストが含まれており、
これは曝気槽３内で除去されるが、散気装置５の
散気孔の径を大きくしてダストによる目詰まりを
防止するとよく、孔径の小さい散気管や散気板な
どを使用するときには、バツグフイルタなどの除
じん器２２を経由させてダストを除去したのち、
散気装置５に供給することが好ましい。 Further, the outflow air 21 flowing out from the dryer 14 contains dust generated during drying.
This is removed in the aeration tank 3, but it is best to increase the diameter of the aeration holes in the aeration device 5 to prevent clogging with dust. After removing dust through a dust remover 22 such as
It is preferable to supply the air to the air diffuser 5.
なお、曝気槽３に空気を供給する曝気ブロワ１
５としては、空気圧縮機なども勿論含まれるもの
である。 Note that the aeration blower 1 supplies air to the aeration tank 3.
Of course, 5 includes an air compressor and the like.
以上述べたように、本発明によれば次のような
重要効果が得られるものである。 As described above, according to the present invention, the following important effects can be obtained.
有機性汚水、有機性汚泥などの曝気用に使用
される曝気ブロワ（空気圧縮機を含む）の吐出
空気の保有熱を利用するから、乾燥用の有価燃
料や電熱などを著しく節減することができ、大
きな省エネルギー効果がある。 Since the heat retained in the discharged air of the aeration blower (including the air compressor) used for aerating organic wastewater and organic sludge is used, valuable fuel and electric heat for drying can be significantly reduced. , has a large energy saving effect.
曝気ブロワ（空気圧縮機を含む）の吐出空気
の流れと圧力を利用できるから、従来必要とさ
れていた乾燥器への熱風フアンが不要となる。 Since the flow and pressure of the air discharged from the aeration blower (including the air compressor) can be used, the hot air fan required for the dryer is no longer necessary.
乾燥工程からの流出空気中の悪臭成分は自動
的に曝気槽に導かれ、槽内に存在する微生物に
よつて脱臭されるから、特別脱臭工程や設備が
不要になる。 Malodorous components in the air flowing out from the drying process are automatically led to the aeration tank and deodorized by the microorganisms present in the tank, eliminating the need for a special deodorizing process or equipment.
次に本発明の実施例を示す。 Next, examples of the present invention will be shown.
某衛生センタでは、前記実施態様に示した生物
学的硝化脱窒素プロセスにより、し尿を40Kl／ｄ
処理しており、硝化を行う曝気槽には、曝気ブロ
ワによつて28Nm3／minの空気が供給されてい
た。 At a certain sanitary center, the biological nitrification and denitrification process shown in the above embodiment was used to reduce human waste to 40Kl/d.
The aeration tank for nitrification was supplied with air at 28Nm 3 /min by an aeration blower.
また、本プロセスからの汚泥発生量は、余剰活
性汚泥200Kg・ds／ｄと、高度処理のための
FeCl3による凝集沈殿処理工程からの凝集沈殿汚
泥60Kg・ds／ｄが発生し、合計260Kg・ds／ｄの
汚泥が排出されていた。この汚泥をベルトプレス
型脱水機で脱水し、含水率78％の脱水ケーキを
得、１日中の汚泥発生量（260Kg・ds／ｄ）に相
当する脱水ケーキを密閉型充填層乾燥器内に層厚
50cmに充填し、曝気ブロワ吐出空気（温度80℃）
をさらに重油による熱風炉で100℃に加熱し、こ
れを乾燥器内に下部より通気した。このようにし
て、24時間通気乾燥したのち、乾燥物を取り出し
たところ、含水率63％であり、流動焼却炉にて自
燃可能であつた。 In addition, the amount of sludge generated from this process is 200Kg・ds/d of surplus activated sludge, and
A total of 60 kg/ds/d of flocculated sludge was generated from the coagulation/sedimentation treatment process using FeCl 3 , and a total of 260 kg/ds/d of sludge was discharged. This sludge is dehydrated using a belt press type dehydrator to obtain a dehydrated cake with a moisture content of 78%, and the dehydrated cake equivalent to the amount of sludge generated in one day (260Kg・ds/d) is placed in a closed packed bed dryer. layer thickness
Fill 50cm with aeration blower discharge air (temperature 80℃)
was further heated to 100°C in a hot air oven using heavy oil, and this was vented into the dryer from the bottom. After air drying in this manner for 24 hours, the dried material was taken out and found to have a moisture content of 63% and was capable of self-combustion in a fluidized bed incinerator.
また、曝気ブロワ吐出空気の加熱に消費した重
油は約1.2／ｈであつた。 Further, the amount of heavy oil consumed for heating the air discharged from the aeration blower was approximately 1.2/h.
なお、乾燥器からの流出空気を曝気槽に供給
し、し尿の曝気用空気として使用したところ、何
の支障もなく、全く悪影響はみられず、悪臭成分
も効果的に除去された。 In addition, when the outflow air from the dryer was supplied to an aeration tank and used as air for aerating human waste, there were no problems, no adverse effects were observed, and malodorous components were effectively removed.
図面は本発明の一実施態様を示す系統説明図で
ある。
１……し尿、３……曝気槽、５……散気装置、
７……固液分離機、８……生物処理水、９……返
送汚泥、１０……余剰活性汚泥、１１……凝集沈
殿汚泥、１２……機械脱水機、１３……脱水ケー
キ、１４……乾燥器、１５……曝気ブロワ、１６
……吐出空気、１７……熱源、１８……熱風、１
９……乾燥物、２０……吸入空気、２１……流出
空気、２２……除じん器。
The drawing is a system explanatory diagram showing one embodiment of the present invention. 1... human waste, 3... aeration tank, 5... aeration device,
7...Solid-liquid separator, 8...Biological treatment water, 9...Return sludge, 10...Excess activated sludge, 11...Coagulated sedimentation sludge, 12...Mechanical dehydrator, 13...Dehydrated cake, 14... ...Dryer, 15...Aeration blower, 16
...Discharged air, 17...Heat source, 18...Hot air, 1
9... Dry material, 20... Intake air, 21... Outflow air, 22... Dust remover.
Claims (1)
発生する含水固形物を乾燥するに際し、前記処理
における曝気工程に使用する曝気ブロワの吐出空
気及び又は吸入空気を任意の熱源により加熱して
得た高温の曝気ブロワ吐出空気を、前記含水固形
物と直接接触させたのち、発生する悪臭と共に前
記曝気工程へ供給することを特徴とする含水固形
物の乾燥方法。 ２ 前記高温の曝気ブロワ吐出空気を、前記含水
固形物と直接接触させたのち除じんして前記曝気
工程へ供給するものである特許請求の範囲第１項
記載の含水固形物の乾燥方法。[Claims] 1. When drying water-containing solids generated in the treatment of organic sewage, organic sludge, etc., the discharge air and/or intake air of the aeration blower used in the aeration step in the treatment is heated by any heat source. A method for drying a water-containing solid material, which comprises bringing high-temperature aeration blower discharge air obtained by heating into direct contact with the water-containing solid material, and then supplying it to the aeration step together with the generated bad odor. 2. The method of drying a water-containing solid material according to claim 1, wherein the high-temperature aeration blower discharge air is brought into direct contact with the water-containing solid material, and then dust removed and supplied to the aeration step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58207529A JPS60117074A (en) | 1983-11-07 | 1983-11-07 | Method of drying solid matter containing moisture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58207529A JPS60117074A (en) | 1983-11-07 | 1983-11-07 | Method of drying solid matter containing moisture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60117074A JPS60117074A (en) | 1985-06-24 |
| JPS6345637B2 true JPS6345637B2 (en) | 1988-09-09 |
Family
ID=16541227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58207529A Granted JPS60117074A (en) | 1983-11-07 | 1983-11-07 | Method of drying solid matter containing moisture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60117074A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6012926B2 (en) * | 2010-12-08 | 2016-10-25 | 株式会社タスク東海 | Solid fuel production method using activated sludge |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5190179A (en) * | 1975-02-05 | 1976-08-07 | Jukiseiodeino noshuku shokyakusochi | |
| JPS5575989A (en) * | 1978-12-04 | 1980-06-07 | Mitsubishi Heavy Ind Ltd | Sewerage sludge composting apparatus |
-
1983
- 1983-11-07 JP JP58207529A patent/JPS60117074A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60117074A (en) | 1985-06-24 |
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