JPS63242400A - Treatment of excess sludge - Google Patents
Treatment of excess sludgeInfo
- Publication number
- JPS63242400A JPS63242400A JP62075905A JP7590587A JPS63242400A JP S63242400 A JPS63242400 A JP S63242400A JP 62075905 A JP62075905 A JP 62075905A JP 7590587 A JP7590587 A JP 7590587A JP S63242400 A JPS63242400 A JP S63242400A
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- saponin
- treatment
- excess sludge
- excess
- 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
- 239000010802 sludge Substances 0.000 title claims abstract description 48
- 229930182490 saponin Natural products 0.000 claims abstract description 24
- 150000007949 saponins Chemical class 0.000 claims abstract description 24
- 239000001397 quillaja saponaria molina bark Substances 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 11
- 239000010865 sewage Substances 0.000 claims abstract description 5
- 239000001653 FEMA 3120 Substances 0.000 claims abstract description 4
- 235000004552 Yucca aloifolia Nutrition 0.000 claims abstract description 4
- 235000012044 Yucca brevifolia Nutrition 0.000 claims abstract description 4
- 235000017049 Yucca glauca Nutrition 0.000 claims abstract description 4
- 239000000284 extract Substances 0.000 claims description 10
- 241001092473 Quillaja Species 0.000 claims description 3
- 235000009001 Quillaja saponaria Nutrition 0.000 claims description 3
- 241000157282 Aesculus Species 0.000 claims description 2
- 244000068988 Glycine max Species 0.000 claims description 2
- 235000010469 Glycine max Nutrition 0.000 claims description 2
- 240000004670 Glycyrrhiza echinata Species 0.000 claims description 2
- 235000001453 Glycyrrhiza echinata Nutrition 0.000 claims description 2
- 235000006200 Glycyrrhiza glabra Nutrition 0.000 claims description 2
- 235000017382 Glycyrrhiza lepidota Nutrition 0.000 claims description 2
- 244000131316 Panax pseudoginseng Species 0.000 claims description 2
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 claims description 2
- 235000003140 Panax quinquefolius Nutrition 0.000 claims description 2
- ZINJLDJMHCUBIP-UHFFFAOYSA-N ethametsulfuron-methyl Chemical compound CCOC1=NC(NC)=NC(NC(=O)NS(=O)(=O)C=2C(=CC=CC=2)C(=O)OC)=N1 ZINJLDJMHCUBIP-UHFFFAOYSA-N 0.000 claims description 2
- 235000008434 ginseng Nutrition 0.000 claims description 2
- 235000010181 horse chestnut Nutrition 0.000 claims description 2
- 229940010454 licorice Drugs 0.000 claims description 2
- NGZUCVGMNQGGNA-UHFFFAOYSA-N 7-[5-(2-acetamidoethyl)-2-hydroxyphenyl]-3,5,6,8-tetrahydroxy-9,10-dioxoanthracene-1,2-dicarboxylic acid 7-[5-(2-amino-2-carboxyethyl)-2-hydroxyphenyl]-3,5,6,8-tetrahydroxy-9,10-dioxoanthracene-1,2-dicarboxylic acid 3,5,6,8-tetrahydroxy-7-[2-hydroxy-5-(2-hydroxyethyl)phenyl]-9,10-dioxoanthracene-1,2-dicarboxylic acid 3,6,8-trihydroxy-1-methyl-9,10-dioxoanthracene-2-carboxylic acid Chemical compound Cc1c(C(O)=O)c(O)cc2C(=O)c3cc(O)cc(O)c3C(=O)c12.OCCc1ccc(O)c(c1)-c1c(O)c(O)c2C(=O)c3cc(O)c(C(O)=O)c(C(O)=O)c3C(=O)c2c1O.CC(=O)NCCc1ccc(O)c(c1)-c1c(O)c(O)c2C(=O)c3cc(O)c(C(O)=O)c(C(O)=O)c3C(=O)c2c1O.NC(Cc1ccc(O)c(c1)-c1c(O)c(O)c2C(=O)c3cc(O)c(C(O)=O)c(C(O)=O)c3C(=O)c2c1O)C(O)=O NGZUCVGMNQGGNA-UHFFFAOYSA-N 0.000 claims 1
- 241001080798 Polygala tenuifolia Species 0.000 claims 1
- 244000149006 Yucca filamentosa Species 0.000 claims 1
- 239000010017 yuan zhi Substances 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 10
- 208000005156 Dehydration Diseases 0.000 abstract description 3
- 244000295923 Yucca aloifolia Species 0.000 abstract description 3
- 230000018044 dehydration Effects 0.000 abstract description 3
- 238000006297 dehydration reaction Methods 0.000 abstract description 3
- 241000605385 Ruscus Species 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract description 2
- 241000218208 Caltha Species 0.000 abstract 1
- 239000011343 solid material Substances 0.000 abstract 1
- 235000017709 saponins Nutrition 0.000 description 20
- 238000005273 aeration Methods 0.000 description 10
- 238000004062 sedimentation Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 230000008719 thickening Effects 0.000 description 3
- 210000003608 fece Anatomy 0.000 description 2
- 239000008394 flocculating agent Substances 0.000 description 2
- 230000003311 flocculating effect Effects 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 230000016615 flocculation Effects 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 229920002401 polyacrylamide Polymers 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- VCUFZILGIRCDQQ-KRWDZBQOSA-N N-[[(5S)-2-oxo-3-(2-oxo-3H-1,3-benzoxazol-6-yl)-1,3-oxazolidin-5-yl]methyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C1O[C@H](CN1C1=CC2=C(NC(O2)=O)C=C1)CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F VCUFZILGIRCDQQ-KRWDZBQOSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000010800 human waste Substances 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 229930002600 steroidal saponin Natural products 0.000 description 1
- 150000008130 triterpenoid saponins Chemical class 0.000 description 1
Landscapes
- Treatment Of Sludge (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、活性汚泥法による汚水処理において発生する
余剰汚泥の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 a method for treating excess sludge generated in sewage treatment using an activated sludge method.
従来の技術
下水、し尿、各種有機性産業廃水など、有機汚濁質を含
有する汚水の活性汚泥法による処理においては、細菌、
かび、原生動物等の増殖にともない曝気槽内の活性汚泥
が増加する。Conventional technology In the treatment of wastewater containing organic pollutants, such as sewage, human waste, and various organic industrial wastewater, using the activated sludge method, bacteria,
Activated sludge in the aeration tank increases with the growth of mold, protozoa, etc.
活性汚泥は二次沈殿池において大部分の水と分離され、
一部はいわゆる返送汚泥として曝気槽に戻されるが、大
部分はいわゆる余剰汚泥として、沈降、遠心脱水、ろ過
等の手段により親水されてケーキ状になり、廃棄または
燃焼等の処理に付される。しかしながら、活性汚泥は一
般に嵩高で脱水困難なものであるか呟ポリアクリルアミ
ド系コ疑集剤等を用いて凝集させてから脱水処理するの
が普通である。Activated sludge is separated from most of the water in the secondary sedimentation tank,
Some of it is returned to the aeration tank as so-called return sludge, but most of it is returned to the aeration tank as so-called surplus sludge, which is made hydrophilic by means such as sedimentation, centrifugal dewatering, and filtration, and then turned into a cake-like form, which is then subjected to treatment such as disposal or combustion. . However, activated sludge is generally bulky and difficult to dewater, so it is common to coagulate it using a polyacrylamide-based coagulant or the like and then dewater it.
発明が解決しようとする問題点
ポリアクリルアミド等の凝集剤を用いる従来の方法は、
活性汚泥凝集効果はすぐれていても、分解し難い合成凝
集剤によって汚泥の脱水ケーキや流出水が汚染されると
いう問題があった。Problems to be Solved by the Invention Conventional methods using flocculants such as polyacrylamide,
Although the activated sludge flocculation effect is excellent, there is a problem in that the dewatered sludge cake and runoff water are contaminated by synthetic flocculants that are difficult to decompose.
そこで本発明の目的は、微生物によって分解され易い凝
集剤により余剰汚泥を凝集させて脱水を容易にする余剰
汚泥処理方法を提供することにある。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a method for treating surplus sludge that facilitates dewatering by flocculating surplus sludge using a flocculant that is easily decomposed by microorganisms.
問題点を解決するための手段
上記目的を達成することに成功した本発明は、余剰汚泥
の脱水処理に先立って汚泥をサポニンで処理することを
特徴とするものである。Means for Solving the Problems The present invention, which has succeeded in achieving the above objects, is characterized in that the sludge is treated with saponin prior to the dewatering treatment of the excess sludge.
サポニンには、ユッカ、サルサ、ルスカス等から抽出さ
れるステロイドサポニンと、キラヤ、ムクロジ、マロニ
エ、ル−ト、甘草、大豆、人参、紫胡、遠志から抽出さ
れるトリテルペノイドサポニンとがあるが、本発明で用
いるサポニンはこれらのいずれであっても差支えない。Saponins include steroidal saponins extracted from yucca, salsa, ruscus, etc., and triterpenoid saponins extracted from Quillaja, Sapindrum, horse chestnut, root, licorice, soybean, ginseng, Shihu, and Enzhi. The saponin used in the invention may be any of these.
またサポニンとして精製サポニンを用いる必要はなく、
粗サポニンすなわち上述のような原料植物体から水、低
級アルコールまたはこれらの混合物を用いて得られたサ
ポニン含有抽出物をそのまま用いてもよい。In addition, there is no need to use purified saponin as the saponin.
Crude saponin, ie, a saponin-containing extract obtained from the above-mentioned raw material plants using water, lower alcohol, or a mixture thereof, may be used as is.
本発明の処理方法は、普通には、活性汚泥法の常法によ
る汚水処理の余剰汚泥処理工程において実施される。す
なわち、曝気槽から第二次沈殿池に移された水より沈降
により分離された活性汚泥のうち、返送汚泥として曝気
槽に戻される部分と分けられた残りの余剰汚泥に対して
、それが最終的な脱水処理に付されるまでの任意の段階
でサポニンを混入することにより行う。しかしなが呟サ
ポニンの汚泥凝集作用は余剰汚泥として分離される以前
の活性汚泥に対しても当然有効であり且つサポニンが返
送汚泥に入って曝気槽に入っても特に支障はないから、
返送汚泥分離前に、たとえば第二次沈殿池における沈降
処理の段階で、サポニンを添加しても差支えなりゝ。The treatment method of the present invention is normally carried out in the surplus sludge treatment step of sewage treatment using the conventional activated sludge method. In other words, among the activated sludge separated by sedimentation from the water transferred from the aeration tank to the secondary settling tank, the remaining surplus sludge is separated from the part that is returned to the aeration tank as return sludge. This is done by mixing saponin at any stage up to the final dehydration treatment. However, the sludge flocculation effect of Nagamusaponin is naturally effective on activated sludge before it is separated as surplus sludge, and there is no particular problem even if saponin enters the returned sludge and enters the aeration tank.
Before the return sludge is separated, saponin may be added, for example, at the stage of sedimentation treatment in the secondary sedimentation tank.
汚泥に対するサポニンの好適添加量は、サポニンの種類
および汚泥の種類や状態、固形分濃度等により異なるが
、通常、固形分濃度８，０００−１．５，０００ｐｐｍ
の汚泥に対してサポニンとして３〜３００ｐｐ＋ｎが適
当である。The preferred amount of saponin added to sludge varies depending on the type of saponin, the type and condition of sludge, the solid content concentration, etc., but usually the solid content concentration is 8,000-1.5,000 ppm.
3 to 300 pp+n of saponin is appropriate for the sludge.
サポニンで凝集させた余剰汚泥の脱水処理は、遠心脱水
機、フィルタープレス等、任意の脱水（幾を用いて行う
ことができる。The excess sludge flocculated with saponin can be dehydrated using any dehydrator such as a centrifugal dehydrator or a filter press.
発明の効果 本発明は次のような効果を奏する。Effect of the invention The present invention has the following effects.
（ａ）サポニンのすぐれた凝集作用により余剰汚泥がき
わめて脱水し易い性状になるため、含水率の低い汚泥脱
水ケーキを容易に得ることができ、ケーキの運搬、処理
およびフンポスト等への利用が容易になる。(a) The excellent flocculating action of saponin makes excess sludge extremely easy to dehydrate, making it easy to obtain a dehydrated sludge cake with a low water content, making it easy to transport, process, and use the cake in dung posts, etc. become.
（ｂ）サポニンはもちろん、サポニン含有抽出物をその
まま用いる場合におけるサポニン以外の成分ち、微生物
によって分解され易いものであるか駅長期間使用を続け
ても曝気槽内蓄積や流出水汚染にともなう不都合を招く
恐れがない。また、脱水ケーキのフンポスト生成物の有
効利用の妨げになることらない。(b) Not only saponin, but also components other than saponin when using saponin-containing extracts as they are, whether they are easily decomposed by microorganisms or may cause inconveniences due to accumulation in the aeration tank or contamination of runoff water even after long-term use. There is no danger of inviting. Moreover, it does not interfere with the effective utilization of the dung post product of the dehydrated cake.
χ美例 以下、実施例を示して本発明を説明する。χ beautiful example The present invention will be explained below with reference to Examples.
実施例 １
ユッカの根１０ｋｇを細断し、９０°Ｃの熱水５０ｅで
３時間抽出後、固液を分離した。同様の操作をさらに２
回くり返して、抽出液合計２３０Ｃを得た。この抽出液
を濃縮し次いで乾燥して、サポニン含有量１０．５％の
抽出物３ 、２ ｋｇを得た。Example 1 10 kg of yucca roots were shredded and extracted with 90°C hot water 50e for 3 hours, after which the solid and liquid were separated. 2 more similar operations
This was repeated several times to obtain a total of 230C of extract liquid. This extract was concentrated and then dried to obtain 3.2 kg of an extract with a saponin content of 10.5%.
一方、食品工場の廃水（日４ｉ１７３Ｑｍコ、 ＢＯＤ
２１０ｍｇ／ｅ）をｐ）（７，０、空気量１３００ｍ
’／Ｈで曝気処理し、曝気槽から溢流した被処理水を第
二次沈殿池に送った。そこで沈降分離された活性汚泥の
一部は曝気槽に戻し、残りを余剰汚泥として沈降濃縮槽
に送った。濃縮槽中の余剰汚泥に対して、上記ユソカ抽
出物ＳＯｐｐｍを添加し、攪拌してから静置し、汚泥を
沈降させた。このとき５Ｖ３０（沈降性の目安となる３
０分後のスラッジ体積）は８５％から２１％に改善され
、処理時間が短縮された。On the other hand, wastewater from food factories (day 4i173Qm, BOD
210mg/e) p) (7,0, air volume 1300m
Aeration treatment was carried out with '/H, and the water to be treated overflowing from the aeration tank was sent to a secondary settling tank. A portion of the activated sludge separated by sedimentation was returned to the aeration tank, and the remainder was sent to the sedimentation thickening tank as surplus sludge. The above-mentioned Yusoka extract SOppm was added to the excess sludge in the thickening tank, stirred, and allowed to stand to settle the sludge. At this time, 5V30 (3 which is a guideline for sedimentation)
The sludge volume (after 0 minutes) was improved from 85% to 21%, and the processing time was shortened.
このときの流出水はＢＯＤ１０ｐｐｎ＋であった。沈降
した汚泥は７０％を返送し、３０％を濃縮槽においてさ
らに沈降分離した後、遠心分離磯で脱水した。得られた
脱水ケーキの含水率は８８％から７６％に改善された。The effluent water at this time had a BOD of 10 ppn+. 70% of the settled sludge was returned, and 30% was further separated by sedimentation in a thickening tank, and then dehydrated in a centrifugal rock. The moisture content of the resulting dehydrated cake was improved from 88% to 76%.
実施例 ２
キラヤ樹皮１０に８を細断し、５０％ｖ ／ ｖメタノ
ール１００ｅで２時間還流抽出後、固液を分離した。同
様の操作をくり返して、抽出液合計１９０Ｑを得た。こ
の抽出液を濃縮し次いで乾燥して、サポニン含有量１９
％の抽出物２．１ｋｇを得た。Example 2 Quillaja bark was chopped into 8 to 10 pieces and solid-liquid was separated after extraction under reflux with 50% v/v methanol 100e for 2 hours. The same operation was repeated to obtain a total of 190Q of extracts. This extract was concentrated and then dried to obtain a saponin content of 19
2.1 kg of % extract was obtained.
Claims (2)
剰汚泥を脱水処理するに当り、余剰汚泥をあらかじめサ
ポニンで処理しておくことを特徴とする余剰汚泥処理方
法。(1) A method for treating surplus sludge, which is characterized in that the surplus sludge generated during sewage treatment by the activated sludge method is treated with saponin in advance when the surplus sludge is dehydrated.
キラヤ、ムクロジ、マロニエ、ルート、甘草、大豆、人
参、紫胡または遠志の抽出物を用いて余剰汚泥を処理す
る特許請求の範囲第１項記載の方法。(2) Yucca, salsa, ruscas containing saponin,
2. The method according to claim 1, wherein the excess sludge is treated using extracts of Quillaja, Sapindrum, horse chestnut, root, licorice, soybean, ginseng, Shiko or Yuanzhi.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62075905A JPH07115040B2 (en) | 1987-03-31 | 1987-03-31 | Excess sludge treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62075905A JPH07115040B2 (en) | 1987-03-31 | 1987-03-31 | Excess sludge treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63242400A true JPS63242400A (en) | 1988-10-07 |
| JPH07115040B2 JPH07115040B2 (en) | 1995-12-13 |
Family
ID=13589816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62075905A Expired - Lifetime JPH07115040B2 (en) | 1987-03-31 | 1987-03-31 | Excess sludge treatment method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07115040B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2309036A (en) * | 1996-01-11 | 1997-07-16 | Garth M Henderson | Saponin and carbohydrate promote bio-degradation of organic waste |
| JPH09295000A (en) * | 1996-04-30 | 1997-11-18 | Eiichi Tashiro | Anaerobic digestion of sludge or raw excretion |
| JPH11192500A (en) * | 1997-09-28 | 1999-07-21 | Eiichi Tashiro | Anaerobical digestion of sludge |
| CN104788007A (en) * | 2015-04-29 | 2015-07-22 | 北京同创碧源水务科技发展有限公司 | Deep dehydration method of sludge after domestic sewage treatment |
-
1987
- 1987-03-31 JP JP62075905A patent/JPH07115040B2/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2309036A (en) * | 1996-01-11 | 1997-07-16 | Garth M Henderson | Saponin and carbohydrate promote bio-degradation of organic waste |
| WO1997025411A1 (en) * | 1996-01-11 | 1997-07-17 | Henderson Garth M | A bio-enhancer |
| US6228265B1 (en) | 1996-01-11 | 2001-05-08 | Digestco Limited | Bio-enhancer |
| JPH09295000A (en) * | 1996-04-30 | 1997-11-18 | Eiichi Tashiro | Anaerobic digestion of sludge or raw excretion |
| JPH11192500A (en) * | 1997-09-28 | 1999-07-21 | Eiichi Tashiro | Anaerobical digestion of sludge |
| CN104788007A (en) * | 2015-04-29 | 2015-07-22 | 北京同创碧源水务科技发展有限公司 | Deep dehydration method of sludge after domestic sewage treatment |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07115040B2 (en) | 1995-12-13 |
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