JPS63235396A - Method for treating sewage slude to convert it into oleaginous matter - Google Patents
Method for treating sewage slude to convert it into oleaginous matterInfo
- Publication number
- JPS63235396A JPS63235396A JP6963687A JP6963687A JPS63235396A JP S63235396 A JPS63235396 A JP S63235396A JP 6963687 A JP6963687 A JP 6963687A JP 6963687 A JP6963687 A JP 6963687A JP S63235396 A JPS63235396 A JP S63235396A
- Authority
- JP
- Japan
- Prior art keywords
- reaction
- sewage sludge
- sludge
- foaming
- pressure
- 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
- 238000000034 method Methods 0.000 title claims description 19
- 239000010865 sewage Substances 0.000 title description 5
- 239000010801 sewage sludge Substances 0.000 claims abstract description 32
- 238000006243 chemical reaction Methods 0.000 claims abstract description 28
- 238000005187 foaming Methods 0.000 claims abstract description 22
- 150000001341 alkaline earth metal compounds Chemical class 0.000 claims description 5
- 230000002401 inhibitory effect Effects 0.000 claims description 2
- 239000007795 chemical reaction product Substances 0.000 abstract description 7
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 4
- 229910000019 calcium carbonate Inorganic materials 0.000 abstract description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 abstract description 2
- 239000000920 calcium hydroxide Substances 0.000 abstract description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 abstract description 2
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 abstract description 2
- 239000000292 calcium oxide Substances 0.000 abstract description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 abstract description 2
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 abstract description 2
- 239000001095 magnesium carbonate Substances 0.000 abstract description 2
- 229910000021 magnesium carbonate Inorganic materials 0.000 abstract description 2
- 229910052784 alkaline earth metal Inorganic materials 0.000 abstract 3
- 150000001342 alkaline earth metals Chemical class 0.000 abstract 3
- 239000010802 sludge Substances 0.000 description 18
- 238000000926 separation method Methods 0.000 description 10
- 239000007788 liquid Substances 0.000 description 6
- 239000008346 aqueous phase Substances 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 239000012071 phase Substances 0.000 description 5
- 239000002002 slurry Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
- 239000005416 organic matter Substances 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 150000001339 alkali metal compounds Chemical class 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000000344 soap Substances 0.000 description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 150000001447 alkali salts Chemical class 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 238000011085 pressure filtration Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- -1 soaps Chemical class 0.000 description 1
Landscapes
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Treatment Of Sludge (AREA)
Abstract
Description
【発明の詳細な説明】
〔技術分野〕
本発明は、下水汚泥の油化処理方法に関するものである
。DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a method for treating sewage sludge into oil.
下水処理場から排出される汚泥（下水汚泥）は、全国で
年間約５０００万ｒｒ１′（含水率９８％）という莫大
な量であり、年々増加の傾向にある。従来、このような
下水汚泥の処理に関しては、その８０％前後が脱水後、
埋立処分されているが、しかし、この場合には埋立地確
保の問題があり、都市化の発展により、その埋立地確保
は年々困難になってきている。また、下水汚泥は焼却処
理することも可能であり、この方法は、その″処理生成
物が被処理原料である下水汚泥の社に比して著しく減容
化された焼却灰であり、被処理原料の減容化という点か
らは非常に有効な方法である。しかしながら、この方法
の場合、下水汚泥中の水分の蒸発に多大の熱エネルギー
を要するために、ランニングコストが高く、経済的でな
いという問題を有している。このような現状に対し１本
発明者らは、特願昭６０−２７９６７９号において、下
水汚泥の液化処理方法を提案している。この方法は、下
水汚泥中の有機物をアルカリ性条件下、高められた温度
において、該温度の飽和本然気圧以上の加圧下で加熱反
応処理した後、得られた反応処ｉ生成物を冷却処理する
というものである。しかしながら、この方法は、触媒と
してアルカリ金属化合物を使用していることから、生汚
泥、例えば、初沈生汚泥や混合生汚泥に対して、油化反
応中に発泡現象がｉｌＫ察された。The amount of sludge (sewage sludge) discharged from sewage treatment plants is a huge amount, approximately 50 million rr1' (98% water content) annually nationwide, and is increasing year by year. Conventionally, in the treatment of sewage sludge, around 80% of it was done after dewatering.
However, in this case, there is the problem of securing a landfill site, and with the development of urbanization, it is becoming more difficult to secure a landfill site every year. In addition, sewage sludge can also be incinerated, and in this method, the treated product is incinerated ash whose volume is significantly reduced compared to that of the sewage sludge, which is the raw material to be treated. This method is very effective in terms of reducing the volume of raw materials. However, this method requires a large amount of thermal energy to evaporate the water in the sewage sludge, so running costs are high and it is not economical. In response to this current situation, the present inventors have proposed a liquefaction treatment method for sewage sludge in Japanese Patent Application No. 60-279679. is heated under alkaline conditions at an elevated temperature under a pressure higher than the saturated original pressure at said temperature, and then the obtained reaction product is cooled.However, this method Since the method uses an alkali metal compound as a catalyst, a foaming phenomenon was observed during the oil conversion reaction for raw sludge, such as primary settled sludge and mixed raw sludge.
このような発泡現象は、反応生成物の分離性を悪化させ
るばかりではなく、ガスラインに侵入して圧力制御性を
著しく阻害するので、実用上、大変な問題である。Such foaming phenomenon not only deteriorates the separation of the reaction products, but also invades the gas line and significantly impedes pressure controllability, which is a serious problem in practice.
本発明は、前記下水汚泥処理に見られる問題を解決する
ことを目的とする。The present invention aims to solve the problems encountered in sewage sludge treatment.
本発明によれば、発泡性下水汚泥を１反応部度１５０〜
３５０℃において油化処理する方法において、反応前に
あらがしめ該下水汚泥の発泡を抑制するに十分な量のア
ルカリ土類金属化合物を添加することにより、油化反応
を阻害することなく１反応中に起こる発泡現象を防止す
ることを特徴とする下水汚泥の油化処理方法が提供され
る。According to the present invention, foamable sewage sludge is processed at a reaction rate of 150 to
In a method of oil conversion treatment at 350°C, by adding an alkaline earth metal compound in an amount sufficient to roughen the sewage sludge before the reaction and suppress foaming of the sewage sludge, one reaction can be carried out without inhibiting the oil conversion reaction. Provided is a method for treating sewage sludge to oil, which is characterized by preventing the foaming phenomenon that occurs in the sewage sludge.
本発明において彼処ＪＩＩｍ料として用いる発泡性下水
汚泥としては１通常の下水処理場から排出される各種の
汚泥があり、このようなものには、例えば、最初沈殿池
汚泥や、余剰汚泥及びそれらの混合汚泥等が包含砲れる
。The foamable sewage sludge used as the JIIm material in the present invention includes various types of sludge discharged from ordinary sewage treatment plants, such as primary sedimentation tank sludge, surplus sludge, and their Mixed sludge, etc. will be included.
なお、本発明で言う発泡性下水汚泥とは、下水、 汚
泥に対し、アルカリ金属化合物を外部から添加し、又は
添加しないで油化処理を行う時に、発泡現象を示す下水
汚泥を意味するものである。このような下水汚泥は、通
常、乾燥有機物基準で、脂肪分を少なくとも８重ｆｉｋ
％含むものである。The term "foaming sewage sludge" as used in the present invention refers to sewage sludge that exhibits a foaming phenomenon when sewage or sludge is subjected to oil treatment with or without adding an alkali metal compound from the outside. be. Such sewage sludge usually has a fat content of at least 8 times fik on a dry organic matter basis.
%.
本発明の方法を実施するには、単に、高温高圧に保持す
ればよい、ところが、本発明者らの研究によれば、多く
の場合、油化反応中に発泡現象が観察された。この現象
は、汚泥中に多く含まれている脂肪分とアルカリ金属化
合物とで脂肪酸のアルカリ塩、すなわち、石鹸が形成さ
れたためと考えられる０発泡現象は、反応生成物の分離
性を悪化させるばかりでなく、ガスラインに侵入し、圧
力制御性を著しく阻害するので、実用上、大変な問題で
ある。このような現象を防止するために、本発明では、
酸化カルシウム、水酸化カルシウム、炭酸カルシウム、
炭酸マグネシウム等のアルカリ土類金属化合物を添加す
る。これは、アルカリ土類金属化合物の添加により、汚
泥中の脂肪分と非発泡性の金属石鹸を形成させるもので
ある。この場合、アルカリ土類金属化合物の使用量は、
下水汚泥の発泡を抑制するに十分な量であればよく。In order to carry out the method of the present invention, it is sufficient to simply maintain the temperature and pressure. However, according to the research conducted by the present inventors, a foaming phenomenon was often observed during the oil conversion reaction. This phenomenon is thought to be due to the formation of alkali salts of fatty acids, i.e., soaps, between the fat contained in large amounts in the sludge and alkali metal compounds.The zero-foaming phenomenon only worsens the separation of the reaction products. Instead, it invades the gas line and significantly impedes pressure control, which is a serious problem in practice. In order to prevent such a phenomenon, in the present invention,
Calcium oxide, calcium hydroxide, calcium carbonate,
Add an alkaline earth metal compound such as magnesium carbonate. This is to form a non-foaming metal soap with the fat in the sludge by adding an alkaline earth metal compound. In this case, the amount of alkaline earth metal compound used is
The amount may be sufficient as long as it suppresses foaming of sewage sludge.
一般には、下水汚泥１重量部（乾燥固形物基準）に対し
て、通常、０．０１−０．５重量部の割合である。In general, the proportion is usually 0.01-0.5 parts by weight per 1 part by weight of sewage sludge (based on dry solids).
本発明における反応処理は高温高圧下で実施されるが、
この場合１反応部度は１５Ｇ−３５０℃で十分であり、
反応圧力は、その反応温度における飽和水蒸気圧以上１
例えば、２５０℃の場合、５０ｋｇ／ｄ。Although the reaction treatment in the present invention is carried out at high temperature and high pressure,
In this case, 15G-350℃ is sufficient for one reaction part,
The reaction pressure is 1 or more than the saturated water vapor pressure at the reaction temperature.
For example, at 250°C, 50 kg/d.
３００℃の場合、９０ｋｇ／−以上であればよい、この
時、反応温度での保持時間（反応時間）は、ｔｓｏ−ｚ
ｓｏ℃の場合、６０分以上、２５０℃以上の場合、 ６
０分以内であれば良いが、水相に移行する有機物量を減
らすためには、なるべく高い湿度で長時間反応させるこ
とが望ましい、但し、反応温度を高くすることや、長い
時間反応を行おせるということは、イニシャルコストの
増大をまねくので、反応温度は３００℃以下、保持時間
は６０分以下が妥当である。In the case of 300°C, it is sufficient if it is 90 kg/- or more. At this time, the holding time (reaction time) at the reaction temperature is tso-z
60 minutes or more at SO℃, 60 minutes or more at 250℃ or more
It is fine if the reaction is within 0 minutes, but in order to reduce the amount of organic matter transferred to the aqueous phase, it is desirable to react for a long time at as high a humidity as possible. However, do not raise the reaction temperature or conduct the reaction for a long time. Since increasing the temperature increases the initial cost, it is appropriate that the reaction temperature be 300° C. or less and the holding time be 60 minutes or less.
本発明において、圧力は、下水汚泥からの水蒸気による
自己発生圧を利用することができるが、必要に応じ１例
えば、窒素ガス、炭酸ガス、アルゴンガス等を用いて加
圧することもできる。In the present invention, self-generated pressure by water vapor from sewage sludge can be used as pressure, but pressure can also be increased using, for example, nitrogen gas, carbon dioxide gas, argon gas, etc., if necessary.
本発明においては、前記のようにして得られた反応処理
生成物を冷却処理するが、そ、こで得られた冷却処理生
成物は、相分離性の良好なもので、上部の水性相と下部
のスラリー相とに容易に分離される。この生成物の相分
離性の良いこと及び水性相の透明度の高いことは、本発
明の大きな特徴の１つである。この冷却処理生成物の分
離処理には１通常の固液分離手段が適用されるが、一般
には、スラリー相と水性相との間の密度差を利用した分
離手段、例えば、前記静置による重力分離の他、″ａ心
全分離を採用することができる。In the present invention, the reaction product obtained as described above is subjected to a cooling treatment. It is easily separated from the lower slurry phase. The good phase separation property of this product and the high transparency of the aqueous phase are one of the major features of the present invention. 1. Normal solid-liquid separation means are applied to the separation treatment of this cooling-treated product, but in general, separation means that utilize the density difference between the slurry phase and the aqueous phase, for example, gravity by the above-mentioned standing In addition to separation, "a-core total separation" can be adopted.
本発明において、生成された油状物質は、下水汚泥中に
初めから含まれていた無機物等と共にスラリー相を形成
する。このスラリー相から液状の油状物質を分離回収す
るには１通常の固液分離手段が用いられるが、油状物質
の回収率を高めるためには、スクリュウプレスや加圧濾
過等の加圧を伴った固液分離処理や、遠心分離等の加重
を伴った固液分離処理に付すのがよい。この場合、必要
に応じ、温度３０〜１００℃程度の加熱を併用すること
ができる。In the present invention, the produced oily substance forms a slurry phase together with the inorganic substances originally contained in the sewage sludge. Normal solid-liquid separation means are used to separate and recover liquid oily substances from this slurry phase, but in order to increase the recovery rate of oily substances, methods involving pressurization such as a screw press or pressure filtration are used. It is preferable to subject it to a solid-liquid separation treatment or a solid-liquid separation treatment accompanied by a load such as centrifugation. In this case, heating at a temperature of about 30 to 100° C. can be used in combination, if necessary.
本発明によれば、従来産業廃棄物として取り扱われてい
た下水汚泥を、液体燃料（発熱量的８０００ｋｃａｌ／
ｋｇ）として有用な油状物質に変換させることができる
。しかも、この場合、油状物質の収率は、乾燥有機物基
準で４０〜５０フもの高い値に達する。その上、本発明
では、水相に移行する有機物の割合が少なく、かつ透明
性が高いので、下水処理場の水処理工程に与える影響も
少ないと言える。さらに、本発明においては、油化反応
中の発泡現象を防止できるため、反応生成物の分離性の
向上及び圧力制御性の向上等が期待でき、実用上、非常
に有利である。この油化反応時の発泡現象並びに発泡防
止方法は本発明者らが初めて見出した意外な事実である
。それ故、本発明の下水汚泥処理方法は、技術的、経済
的に非常に有利な方法であるということができる。According to the present invention, sewage sludge, which was conventionally treated as industrial waste, can be converted into liquid fuel (calorific value of 8000 kcal/
kg) can be converted into a useful oil. Moreover, in this case, the yield of oily substances reaches values as high as 40 to 50 degrees Fahrenheit based on dry organic matter. Furthermore, in the present invention, since the proportion of organic matter transferred to the aqueous phase is small and the transparency is high, it can be said that it has little influence on the water treatment process of a sewage treatment plant. Furthermore, in the present invention, since the foaming phenomenon during the oil conversion reaction can be prevented, it is expected that the separability of the reaction product and the pressure controllability will be improved, which is very advantageous in practice. This foaming phenomenon during the oil conversion reaction and the method for preventing foaming are unexpected facts discovered for the first time by the present inventors. Therefore, the sewage sludge treatment method of the present invention can be said to be a technically and economically very advantageous method.
次に、本発明を実施例によりさらに詳細に説明する。 Next, the present invention will be explained in more detail with reference to Examples.
参考例１
下水汚泥として、標準活性汚泥法の処理場から排出され
た混合生汚泥の脱水ケーキを選び、試験に用いた。この
汚泥は高分子凝集剤を添加された後、ベルトプレスにて
脱水されたものである。その代表的な性状は表−１の通
りである。Reference Example 1 As sewage sludge, a dehydrated cake of mixed raw sludge discharged from a treatment plant using the standard activated sludge method was selected and used in the test. This sludge was dehydrated using a belt press after adding a polymer flocculant. Its typical properties are shown in Table-1.
表−１
上記脱水汚泥１００ｇに、あらかじめ炭酸ナトリウムを
乾燥固形物に対し０．０５重量部添加し、内容量３００
ｍ１のオートクレーブに充填し、３００’Ｃまで加熱し
た。この際、圧力はあらかじめ窒素ガスで１２０ｋｇ／
ｃｄまで加圧しておき、温度上昇に伴う圧力増加を圧力
調整弁を用いて、１２０ｋｇ／ｃｄに制御した。Table 1 To 100 g of the above dehydrated sludge, 0.05 parts by weight of sodium carbonate based on the dry solids was added in advance, and the content was 300 g.
A ml autoclave was filled and heated to 300'C. At this time, the pressure is set to 120 kg/120 kg with nitrogen gas in advance.
The pressure was increased to 120 kg/cd using a pressure regulating valve, and the increase in pressure accompanying temperature rise was controlled to 120 kg/cd.
しかし、温度が２００℃を越えるころから、圧力制御性
が悪くなり、一定値とならなかった。その後。However, when the temperature exceeded 200° C., the pressure controllability deteriorated and the pressure did not reach a constant value. after that.
反応は温度が３００℃に到達後ただちに１００℃以下ま
で冷却し、終了させた。Immediately after the temperature reached 300°C, the reaction was cooled to 100°C or less to complete the reaction.
温度が室温まで下がってから、オートクレーブ゛ を開
けたところ、発泡現象が観察され、その泡は一部ガスラ
インにまで侵入しており、この泡が圧力制御性を著しく
悪化させていたものと考えられた。When the autoclave was opened after the temperature had cooled to room temperature, foaming was observed, and some of the bubbles had penetrated into the gas line, and we believe that these bubbles were causing a significant deterioration in pressure control. It was done.
さらに１反応生成物を静置分離したところ、スラリー相
と水性相とがきれいに分離せず、プロダクト分離性もこ
の発泡現象により、阻害されることが明らかとなった。Furthermore, when one reaction product was separated by standing, it became clear that the slurry phase and the aqueous phase were not separated cleanly, and that the product separability was also inhibited by this foaming phenomenon.
しかしながら、油化反応そのものは円滑に進行し、オイ
ル収率は約４０％に達した。However, the oil conversion reaction itself proceeded smoothly, and the oil yield reached approximately 40%.
参考例２
下水汚泥として、参考例１とは異なる複数の処理場から
汚泥脱水ケーキを採取し、試験に用いた。Reference Example 2 As sewage sludge, sludge dewatering cakes were collected from multiple treatment plants different from those in Reference Example 1 and used in the test.
これらの汚泥はすべて高分子凝集剤を添加された後、ベ
ルトプレスにて脱水されたものである。これらの汚泥に
対し、参考例１と同様の油化処理を行ない、表−２に示
す結果を得た。但し、反応前に炭酸ナトリウムの添加は
行わなかった。All of these sludges were dehydrated using a belt press after adding a polymer flocculant. These sludges were subjected to the same oil conversion treatment as in Reference Example 1, and the results shown in Table 2 were obtained. However, sodium carbonate was not added before the reaction.
表−２油化結果（発泡について）
上表に示したごとく、汚泥中の脂肪分が、乾燥有機固形
物当たりで部以上含まれる汚泥の場合、油化反応中に発
泡現象がｉ察された。Table 2 Results of conversion to oil (foaming) As shown in the table above, in the case of sludge containing more than 1 part of fat per dry organic solid, a foaming phenomenon was observed during the conversion to oil reaction. .
実施例１
参考例２の汚泥Ｅに、あらかじめ炭酸カルシウムを乾燥
固形物に対し０．０５重量部及び０．２重量部添加し、
油化実験を行った。この後の操作は参考例１と同様であ
る。Example 1 To the sludge E of Reference Example 2, 0.05 parts by weight and 0.2 parts by weight of calcium carbonate based on the dry solids were added in advance,
An oil conversion experiment was conducted. The subsequent operations are the same as in Reference Example 1.
Claims (1)
おいて油化処理する方法において、反応前にあらかじめ
該下水汚泥の発泡を抑制するに十分な量のアルカリ土類
金属化合物を添加し、油化反応を阻害することなく、反
応中に起こる発泡現象を防止することを特徴とする下水
汚泥の油化処理方法。(1) In a method of treating foamable sewage sludge to oil at a reaction temperature of 150 to 350°C, an alkaline earth metal compound is added in advance in an amount sufficient to suppress the foaming of the sewage sludge before the reaction. A method for treating sewage sludge to oil, which is characterized by preventing the foaming phenomenon that occurs during the reaction without inhibiting the reaction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62069636A JPH072240B2 (en) | 1987-03-24 | 1987-03-24 | Oil treatment method for sewage sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62069636A JPH072240B2 (en) | 1987-03-24 | 1987-03-24 | Oil treatment method for sewage sludge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63235396A true JPS63235396A (en) | 1988-09-30 |
| JPH072240B2 JPH072240B2 (en) | 1995-01-18 |
Family
ID=13408548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62069636A Expired - Lifetime JPH072240B2 (en) | 1987-03-24 | 1987-03-24 | Oil treatment method for sewage sludge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH072240B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01270999A (en) * | 1988-04-25 | 1989-10-30 | Agency Of Ind Science & Technol | Liquefaction treatment process of sewage |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60262888A (en) * | 1984-06-08 | 1985-12-26 | Agency Of Ind Science & Technol | Liquefaction of wooden biomass |
| JPS6166789A (en) * | 1984-09-11 | 1986-04-05 | Agency Of Ind Science & Technol | Liquefaction of cellulosic biomass under supercritical conditions |
| JPS61225280A (en) * | 1985-03-30 | 1986-10-07 | Agency Of Ind Science & Technol | Liquefaction of cellulose-containing biomass |
| JPS61238399A (en) * | 1985-04-15 | 1986-10-23 | Japan Organo Co Ltd | Apparatus for converting sludge to oil |
-
1987
- 1987-03-24 JP JP62069636A patent/JPH072240B2/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60262888A (en) * | 1984-06-08 | 1985-12-26 | Agency Of Ind Science & Technol | Liquefaction of wooden biomass |
| JPS6166789A (en) * | 1984-09-11 | 1986-04-05 | Agency Of Ind Science & Technol | Liquefaction of cellulosic biomass under supercritical conditions |
| JPS61225280A (en) * | 1985-03-30 | 1986-10-07 | Agency Of Ind Science & Technol | Liquefaction of cellulose-containing biomass |
| JPS61238399A (en) * | 1985-04-15 | 1986-10-23 | Japan Organo Co Ltd | Apparatus for converting sludge to oil |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01270999A (en) * | 1988-04-25 | 1989-10-30 | Agency Of Ind Science & Technol | Liquefaction treatment process of sewage |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH072240B2 (en) | 1995-01-18 |
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