JPH0375240B2 - - Google Patents
Info
- Publication number
- JPH0375240B2 JPH0375240B2 JP59055998A JP5599884A JPH0375240B2 JP H0375240 B2 JPH0375240 B2 JP H0375240B2 JP 59055998 A JP59055998 A JP 59055998A JP 5599884 A JP5599884 A JP 5599884A JP H0375240 B2 JPH0375240 B2 JP H0375240B2
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- residue
- dried
- dehydrated
- 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 - Lifetime
Links
- 239000010802 sludge Substances 0.000 claims description 30
- 238000005273 aeration Methods 0.000 claims description 13
- 239000010865 sewage Substances 0.000 claims description 12
- 238000001035 drying Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000002485 combustion reaction Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 230000000717 retained effect Effects 0.000 claims description 3
- 239000010800 human waste Substances 0.000 description 8
- 239000000446 fuel Substances 0.000 description 6
- 238000009423 ventilation Methods 0.000 description 4
- 239000004449 solid propellant Substances 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229920006317 cationic polymer Polymers 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Landscapes
- Gasification And Melting Of Waste (AREA)
- Treatment Of Sludge (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、し尿、下水その他の有機性汚水の処
理に伴つて発生するし渣、汚泥などの含水物の省
エネルギ的な処理方法に関するものである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an energy-saving method for treating water-containing materials such as sludge and sludge generated during the treatment of human waste, sewage, and other organic wastewater. It is.
従来、し尿、下水その他の有機性汚水の処理に
おいて発生するし渣、汚泥などの含水物は、ベル
トプレス、遠心脱水機など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、処
理、処分するに当つて乾燥する必要がある。
Conventionally, water-containing materials such as human waste, sewage, and other organic wastewater are dehydrated using mechanical dehydrators such as belt presses and centrifugal dehydrators, but the moisture content is still high. , must be dried before processing and disposal.
特に、余剰活性汚泥と擬集沈殿汚泥は、混合さ
れたのちカチオンポリマなどの脱水助剤が添加さ
れて機械脱水されるが、脱水ケーキの含水率が80
%台と高いことが多く、乾燥に多量の有価燃料を
消費せざるを得ず、処理施設の維持管理費の負担
が大となつているという最大の問題点がある。 In particular, surplus activated sludge and pseudo-sedimented sludge are mixed and then mechanically dewatered with the addition of a dewatering aid such as a cationic polymer.
The biggest problem is that the drying process requires a large amount of valuable fuel, which increases the burden of maintenance and management costs for treatment facilities.
しかしながら、有機性汚水処理に伴つて不可避
的に発生する前記含水物を滞りなく処分するため
には、前記問題点はやむを得ないと考えられてい
たが、合理的な省エネルギ的な乾燥処理方法の開
発が切望されている。 However, in order to smoothly dispose of the water-containing substances that are inevitably generated in organic wastewater treatment, the above problems were considered to be unavoidable, but rational energy-saving drying methods have not been developed. Development is desperately needed.
本発明は、従来全く利用されることがなかつた
有機性汚水中に含まれる紙類、毛髪などのし渣を
燃料化し、これを汚泥の乾燥用に利用するとい
う、新規な技術思想にもとづき、全く無燃費でき
わめて省エネルギ的にこれら含水物の処理を行
い、当該分野における要請を十分に満足させるこ
とができる処理方法を提供することを目的とする
ものである。
The present invention is based on the novel technical concept of converting paper, hair, and other residues contained in organic sewage, which have never been used in the past, into fuel and using this for drying sludge. It is an object of the present invention to provide a treatment method that can treat these water-containing substances in a completely fuel-free and extremely energy-saving manner, and can fully satisfy the demands in the field.
本発明は、有機性汚水処理において発生したし
渣を機械脱水し、得られた脱水し渣を前記有機性
汚水処理に使用される曝気ブロワの吐出空気の保
有熱により乾燥し、得られた乾燥し渣を焼却し、
該焼却時の燃焼生成熱を前記有機性汚水処理にお
いて発生した汚泥の乾燥に利用することを特徴と
するものである。
The present invention mechanically dehydrates residue generated in organic sewage treatment, and dries the obtained dehydrated residue using the retained heat of the air discharged from an aeration blower used in the organic sewage treatment. Incinerate the residue,
The present invention is characterized in that the heat generated by combustion during the incineration is utilized for drying the sludge generated during the organic sewage treatment.
本発明の一実施例を図面を参照しながら説明す
れば、、バキユームカーなどによつて搬入された
し尿1は、図示しない破砕機を通つたのち、微細
目のスクリーン2によつてし尿中のトイレツトペ
ーパー、毛髪、綿などのし渣7が除去され、除渣
し尿3は曝気槽4と沈殿池5等からなる生物学的
硝化脱素工程などの生物処理工程に供給され処理
されたのち、生物処理水6となつて流出する。一
方、スクリーン2によつて除去回収された含水率
95%程度のし渣7は、スクリユープレス脱水機そ
の他の脱水機8によつて含水率50〜55%に脱水さ
れて脱水し渣9となる。
An embodiment of the present invention will be described with reference to the drawings. After passing through a crusher (not shown), human waste 1 brought in by a vacuum truck or the like is passed through a fine mesh screen 2 into a toilet in the human waste. The human waste 7 such as paper, hair, and cotton is removed, and the removed human waste 3 is supplied to a biological treatment process such as a biological nitrification and deoxidation process consisting of an aeration tank 4 and a settling tank 5, etc., and then treated. It flows out as biologically treated water 6. On the other hand, the moisture content removed and recovered by screen 2
The residue 7, which is about 95%, is dehydrated to a water content of 50 to 55% by a screw press dehydrator or other dehydrator 8 to become a dehydrated residue 9.
次に、脱水し渣9は、密閉型の通気乾燥器10
に供給されて充填層11を形成し、この充填層1
1に、前記曝気槽4に曝気用空気を供給する曝気
ブロワ12の吐出空気13を通気し、その排出空
気14とを曝気槽4に供給する。 Next, the dehydrated residue 9 is stored in a closed type ventilation dryer 10.
is supplied to form a filling layer 11, and this filling layer 1
1, the discharge air 13 of the aeration blower 12 that supplies aeration air to the aeration tank 4 is vented, and the discharged air 14 is supplied to the aeration tank 4.
この曝気ブロワ12の吐出空気13は、空気の
断熱圧縮効果によつて温度が上昇し60〜80℃にも
達するので、脱水し渣9の充填層11内に通気す
ることによつて脱水し渣9は効果的に乾燥され、
含水率10%以下の乾燥し渣15となり、固形燃料
化される。すなわち、脱水し渣9は、繊維分を主
体としているため、通気乾燥器10内に充填層1
1を形成させたとき、汚泥のような相互の付着、
圧密現象がほとんどないため、良好な通気性を確
保することができること、汚泥の脱水ケーキに比
べて含水率が低いので、脱水し渣9を乾燥するた
めの所要熱量は、高水分の汚泥脱水ケーキを乾燥
するための所要熱量よりもはるかに少量でよく、
保有熱量としてはかなり小さい曝気ブロワ12の
吐出空気13によつて、効果的に乾燥し固形燃料
化することができる。 The temperature of the air 13 discharged from the aeration blower 12 rises to 60 to 80°C due to the adiabatic compression effect of the air. 9 is effectively dried;
It dries to a residue 15 with a moisture content of 10% or less, which is turned into solid fuel. That is, since the dehydrated residue 9 is mainly composed of fibers, the packed layer 1 is placed in the ventilation dryer 10.
1, mutual adhesion like sludge,
Since there is almost no consolidation phenomenon, it is possible to ensure good air permeability, and since the moisture content is lower than that of a dehydrated sludge cake, the amount of heat required to dehydrate and dry the residue 9 is lower than that of a high moisture sludge dehydrated cake. Much less heat is needed than the amount of heat required to dry the
The air 13 discharged from the aeration blower 12, which has a considerably small amount of heat, can effectively dry the fuel and turn it into solid fuel.
また、前記生物処理工程の沈殿池5にて沈殿し
た活性汚泥は返送汚泥16として生物処理工程で
利用され、余剰活性汚泥17は遠心脱水機、ベル
トプレスなどの各種機械脱水機18で脱水され、
含水率80%程度の脱水ケーキ19となり、汚泥乾
燥機20に供給される。汚泥乾燥器20における
脱水ケーキ19の乾燥は、重油などの有価燃料を
使用することなく、前述した乾燥し渣15を固形
燃料として焼却炉21において燃焼用空気22を
導入して自燃させ、その燃焼生成ガス23を汚泥
乾燥器20に供給し、乾燥用熱源として利用す
る。このとき、焼却炉21の燃焼生成ガス23の
温度は600〜800℃程度であり、その保有熱量は含
水率80%の脱水ケーキ19を含水率40%以下に乾
燥するのに十分であることが確認された。 In addition, the activated sludge precipitated in the sedimentation tank 5 of the biological treatment process is used as return sludge 16 in the biological treatment process, and the surplus activated sludge 17 is dehydrated with various mechanical dehydrators 18 such as a centrifugal dehydrator and a belt press.
A dehydrated cake 19 with a water content of about 80% is formed and is supplied to a sludge dryer 20. The dehydrated cake 19 is dried in the sludge dryer 20 without using valuable fuel such as heavy oil, and the above-mentioned dried residue 15 is used as solid fuel to be self-combusted by introducing combustion air 22 into the incinerator 21. The generated gas 23 is supplied to the sludge dryer 20 and used as a heat source for drying. At this time, the temperature of the combustion generated gas 23 in the incinerator 21 is about 600 to 800°C, and the amount of heat it possesses is sufficient to dry the dehydrated cake 19 with a moisture content of 80% to a moisture content of 40% or less. confirmed.
このようにして汚泥乾燥器20で乾燥された乾
燥汚泥24は、貯槽25に貯留されるが、この乾
燥汚泥24の一部24′を焼却炉21に供給して
乾燥し渣15と混焼させると、燃焼生成ガス23
の保有熱量を大きく増加させることができるか
ら、汚泥の脱水ケーキ19を含水率10〜20%程度
にまで乾燥させることができる。 The dried sludge 24 dried in the sludge dryer 20 in this way is stored in the storage tank 25, but if a part 24' of this dried sludge 24 is supplied to the incinerator 21, dried, and co-incinerated with the residue 15. , combustion generated gas 23
Since the retained heat amount can be greatly increased, the dehydrated sludge cake 19 can be dried to a moisture content of about 10 to 20%.
なお、汚泥乾燥器20からの乾燥排ガス26及
び焼却炉21からの焼却残渣27は系外へ排出さ
れる。 Note that the dried exhaust gas 26 from the sludge dryer 20 and the incineration residue 27 from the incinerator 21 are discharged to the outside of the system.
以上述べたように本発明によれば、次のような
顕著な有益なる効果を得ることができるものであ
る。
As described above, according to the present invention, the following remarkable beneficial effects can be obtained.
従来、多大の燃費を要していた汚泥の脱水ケ
ーキの乾燥工程が著しく合理化され、燃費が不
要となる。 The process of drying the sludge dewatering cake, which conventionally required a large amount of fuel consumption, has been significantly streamlined and becomes unnecessary.
汚水から除去回収したし渣を機械脱水して得
た脱水し渣を、曝気ブロワの吐出空気で乾燥す
るので、乾燥器内での汚泥のような付、大塊
化、圧密、ベタツキがなく、良好な通気条件を
確保することができ、しかも脱水し渣の含水率
は50%台であり、脱水汚泥の含水率(80%程
度)よりもはるかに低いので、保有熱量として
は大きなものとはいえない曝気ブロワの吐出空
気の保有熱量によつて十分に低水分にまで乾燥
をすることができ、またし渣を燃料化すること
ができる。 The dehydrated residue obtained by mechanically dehydrating the residue removed and collected from wastewater is dried with the discharge air of an aeration blower, so there is no sludge-like buildup, large clumps, compaction, or stickiness in the dryer. Good ventilation conditions can be ensured, and the moisture content of the dehydrated residue is in the 50% range, which is much lower than the moisture content of dehydrated sludge (about 80%), so it has a large amount of heat. Due to the heat content of the air discharged from the aeration blower, drying can be carried out to a sufficiently low moisture content, and the residue can also be used as fuel.
汚水処理に伴つて発生する汚泥の乾燥用熱源
を、もともと汚水中に存在していたし渣を利用
することによつて、外部から重油などの資源を
投入する必要がなく、汚水処理プロセス系内で
自己充足させることができる。 By using the residue that originally existed in the sewage as a heat source for drying the sludge generated during sewage treatment, there is no need to input resources such as heavy oil from outside, and it can be used within the sewage treatment process system. can be self-sufficient.
図面は本発明の一実施例を示す系統説明図であ
る。
1…し尿、2…スクリーン、3…除渣し尿、4
…曝気槽、5…沈殿池、6…生物処理水、7…し
渣、8…脱水機、9…脱水し渣、10…通気乾燥
器、11…充填層、12…曝気ブロワ、13…吐
出空気、14…排出空気、15…乾燥し渣、17
…余剰活性汚泥、18…機械脱水機、19…脱水
ケーキ、20…汚泥乾燥器、21…焼却炉、23
…燃焼生成ガス、24,24′…乾燥汚泥。
The drawing is a system explanatory diagram showing an embodiment of the present invention. 1... Human waste, 2... Screen, 3... Sludge removed human waste, 4
... Aeration tank, 5... Sedimentation tank, 6... Biological treatment water, 7... Sludge, 8... Dehydrator, 9... Dehydrated residue, 10... Ventilation dryer, 11... Packed bed, 12... Aeration blower, 13... Discharge Air, 14...Exhaust air, 15...Dried residue, 17
... Surplus activated sludge, 18... Mechanical dehydrator, 19... Dehydrated cake, 20... Sludge dryer, 21... Incinerator, 23
...Combustion product gas, 24,24'...Dried sludge.
Claims (1)
脱水し、得られた脱水し渣を前記有機性汚水処理
に使用される曝気ブロワの吐出空気の保有熱によ
り乾燥し、得られた乾燥し渣を焼却し、該焼却時
の燃焼生成熱を前記有機性汚水処理において発生
した汚泥の乾燥に利用することを特徴とする含水
物の処理方法。 2 前記乾燥し渣を焼却するに際し、前記汚泥の
乾燥物の一部を混焼するものである特許請求の範
囲第1項記載の含水物の処理方法。[Scope of Claims] 1 Mechanically dewatering the residue generated in organic sewage treatment, drying the obtained dehydrated residue using the retained heat of the discharged air of the aeration blower used in the organic sewage treatment, A method for treating water-containing materials, characterized in that the dried residue is incinerated, and the heat produced by combustion during the incineration is used for drying the sludge generated in the organic sewage treatment. 2. The method for treating water-containing material according to claim 1, wherein a part of the dried sludge is co-incinerated when the dried residue is incinerated.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59055998A JPS60202800A (en) | 1984-03-26 | 1984-03-26 | Treatment of water-containing material |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59055998A JPS60202800A (en) | 1984-03-26 | 1984-03-26 | Treatment of water-containing material |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS60202800A JPS60202800A (en) | 1985-10-14 |
JPH0375240B2 true JPH0375240B2 (en) | 1991-11-29 |
Family
ID=13014746
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP59055998A Granted JPS60202800A (en) | 1984-03-26 | 1984-03-26 | Treatment of water-containing material |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS60202800A (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62106900A (en) * | 1985-11-06 | 1987-05-18 | Ebara Infilco Co Ltd | Method for drying sludge |
GB2403471B (en) * | 2003-07-01 | 2006-06-28 | Internat Technology Traders Lt | Organic waste disposal |
WO2021241857A1 (en) * | 2020-05-27 | 2021-12-02 | 삼성전자주식회사 | Solid feces treatment apparatus and individual feces treatment system including same |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56150499A (en) * | 1980-04-24 | 1981-11-20 | Ebara Infilco Co Ltd | Disposal of sludge |
JPS596985A (en) * | 1982-07-05 | 1984-01-14 | Kubota Ltd | Treatment of waste water with activated sludge |
-
1984
- 1984-03-26 JP JP59055998A patent/JPS60202800A/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56150499A (en) * | 1980-04-24 | 1981-11-20 | Ebara Infilco Co Ltd | Disposal of sludge |
JPS596985A (en) * | 1982-07-05 | 1984-01-14 | Kubota Ltd | Treatment of waste water with activated sludge |
Also Published As
Publication number | Publication date |
---|---|
JPS60202800A (en) | 1985-10-14 |
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