JPH05253589A - Treatment of waste water - Google Patents
Treatment of waste waterInfo
- Publication number
- JPH05253589A JPH05253589A JP4089991A JP8999192A JPH05253589A JP H05253589 A JPH05253589 A JP H05253589A JP 4089991 A JP4089991 A JP 4089991A JP 8999192 A JP8999192 A JP 8999192A JP H05253589 A JPH05253589 A JP H05253589A
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- treatment
- waste water
- tannin
- activated sludge
- 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
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Activated Sludge Processes (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は廃水の処理方法、特に活
性汚泥を用いた廃水の処理方法に係る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wastewater treatment method, and more particularly to a wastewater treatment method using activated sludge.
【０００２】[0002]
【従来の技術】従来から活性汚泥を用いた廃水の処理方
法は、その代表例として曝気槽が挙げられ、広く普及し
ている。この方法は水中に存在するバクテリアによる活
性汚泥を用いたものであり、効率がよく手間がかからな
いものとして知られている。2. Description of the Related Art Conventionally, a method for treating wastewater using activated sludge has been widely used, with a typical example being an aeration tank. This method uses activated sludge caused by bacteria present in water and is known to be efficient and labor-free.
【０００３】[0003]
【発明が解決しようとする課題】しかし、かかる活性汚
泥法は、処理に伴い余剰汚泥量が増加し、かかる汚泥は
嵩高であり、大型の処理設備を必要とする外、かかる汚
泥の分離も容易でない等の課題があった。However, in the activated sludge method, the amount of surplus sludge increases with the treatment, the sludge is bulky, and large sludge treatment equipment is required, and the sludge can be easily separated. There was a problem such as not.
【０００４】[0004]
【課題を解決するための手段】本発明者はかかる課題を
解決し、活性汚泥の有効性を実質的に損なわず、嵩ばら
ず、かつ分離も容易で処理設備も小型化できる廃水の処
理方法を見出すことを目的として種々研究、検討した結
果、活性汚泥と共にある種のフェノール化合物を併用す
ることにより、前記目的を達成し得ることを見出した。Means for Solving the Problems The present inventor has solved the above problems and is a method for treating wastewater which does not substantially impair the effectiveness of activated sludge, is not bulky, is easy to separate, and can downsize treatment equipment. As a result of various studies and studies for the purpose of finding out the above, it was found that the above object can be achieved by using a certain phenol compound together with the activated sludge.
【０００５】かくして本発明は、廃水を活性汚泥と接触
せしめて処理する方法において、活性汚泥にタンニンを
存在せしめて廃水と接触せしめることを特徴とする廃水
の処理方法を提供する。Thus, the present invention provides a method for treating wastewater by bringing it into contact with activated sludge, which comprises treating the activated sludge with tannin to bring it into contact with the wastewater.
【０００６】本発明において、タンニンは活性汚泥中の
微生物に作用し、腐敗菌の増殖を抑制し、またある種の
微生物群と反応して活性汚泥をより活性化させる。In the present invention, tannin acts on the microorganisms in the activated sludge, suppresses the growth of spoilage bacteria, and reacts with a certain group of microorganisms to further activate the activated sludge.
【０００７】本発明において、タンニンの存在量は廃水
１リットルあたり０．００１〜３００ｍｇ程度が適当で
ある。０．００１ｍｇ未満では効果がはっきりせず、逆
に３００ｍｇ超では、水棲動物に毒性を与えることによ
り、廃水処理に不都合が生じる虞れがあるので好ましく
ない。とりわけ、前記範囲のうち、廃水１リットルあた
り０．１〜１０ｍｇを採用する場合には、上記の如き虞
れもなく安定して処理が行えるので特に好ましい。In the present invention, it is appropriate that the amount of tannin present is about 0.001 to 300 mg per liter of wastewater. If it is less than 0.001 mg, the effect is not clear, and if it exceeds 300 mg, toxicity to aquatic animals may be caused, which may cause inconvenience in wastewater treatment, which is not preferable. Above all, it is particularly preferable to use 0.1 to 10 mg per 1 liter of waste water, because the treatment can be performed stably without the above-mentioned fear.
【０００８】次に本発明に用いられる活性汚泥として
は、一般の曝気槽で用いられるものなら不都合はなく、
例えばニトロソモナス、アエロバクター、ニトロバクタ
ー等を適宜一種または複数種同時に用い得る。Next, the activated sludge used in the present invention is not inconvenient if it is used in a general aeration tank,
For example, nitrosomonas, aerobacter, nitrobacter and the like may be appropriately used alone or in combination.
【０００９】タンニンと活性汚泥との作用は、活性汚泥
の濃度とも関係する。活性汚泥の好ましい濃度は、５０
０〜２００００（ＭＬＳＳ）ｐｐｍである。５００（Ｍ
ＬＳＳ）ｐｐｍ未満では、タンニンを用いた効果がはっ
きりせず、逆に２００００（ＭＬＳＳ）ｐｐｍ超では、
タンニンとの反応バランスが悪く、はっきりした効果が
認められないのでいずれも好ましくない。この濃度が１
０００〜１５０００（ＭＬＳＳ）ｐｐｍであると、上記
の如き不都合さがなく、特に好ましい。The action of tannin and activated sludge is also related to the concentration of activated sludge. The preferred concentration of activated sludge is 50
It is 0 to 20000 (MLSS) ppm. 500 (M
Below LSS) ppm, the effect of using tannin is not clear, and conversely, above 20000 (MLSS) ppm,
The reaction balance with tannin is poor, and no clear effect can be observed. This concentration is 1
It is particularly preferable that the content is 000 to 15,000 (MLSS) ppm, because the above-mentioned inconvenience does not occur.
【００１０】本発明において処理される廃水としては、
例えば生活廃水、有機系工場廃水等であるが、とりわけ
生活廃水の処理は効果的である。The wastewater treated in the present invention includes:
For example, domestic wastewater, organic factory wastewater, etc., but the treatment of domestic wastewater is particularly effective.
【００１１】[0011]
【作用】本発明方法を採用すると、タンニンは構造上重
合しやすく高分子になるので、これを使わない場合に比
べると汚泥の性質が異なり、汚泥の濾過速度が２〜３倍
速くなる。また、腐敗菌を抑制することができ、処理槽
の生物相が多様化するので、処理効果が上り、かつ処理
自体も安定化する。When the method of the present invention is adopted, tannin is structurally easily polymerized and becomes a polymer. Therefore, the sludge has a different property as compared with the case where it is not used, and the sludge filtration rate becomes 2-3 times faster. In addition, since spoilage bacteria can be suppressed and the biota of the treatment tank is diversified, the treatment effect is enhanced and the treatment itself is stabilized.
【００１２】[0012]
【実施例】ある団地の合併式浄化槽の実プラント（処理
対象人員５０４人、１日の汚水量１２６ｍ3 ）を用いて
処理を行った。[Examples] Treatment was carried out using an actual plant of a merger-type septic tank in a housing complex (the number of persons to be treated was 504, and the amount of sewage per day was 126 m3).
【００１３】比較例として、表１に今迄の平均的な処理
状況を示した。流入水および２４時間処理後の処理水の
ｐＨ、およびＢＯＤ、ＣＯＤ、ＳＳ、Ｔ−Ｎ（全窒素
分）、Ｔ−Ｐ（全リン分）の各濃度と除去率（％）を示
した。ＭＬＳＳ（曝気槽中の活性汚泥濃度）、ＳＶ30
（１リットルのメスシリンダーに活性汚泥を入れ、３０
分間静置したときの沈降汚泥の体積を％で表したも
の）、余剰汚泥の含水率（脱水ケーキ）、濾過速度も示
した。As a comparative example, Table 1 shows the average processing conditions so far. The pH of the influent water and the treated water after the treatment for 24 hours, and the concentrations of BOD, COD, SS, TN (total nitrogen content) and TP (total phosphorus content) and the removal rate (%) are shown. MLSS (concentration of activated sludge in aeration tank), SV30
(Put activated sludge in a 1-liter graduated cylinder,
The volume of sedimented sludge when allowed to stand for a minute is expressed in%), the water content of excess sludge (dehydrated cake), and the filtration rate are also shown.
【００１４】実施例として、最初処理槽に濃度１ｐｐｍ
となるようにタンニンを投入し、その２０％が流出水と
共に槽外へ排出されると仮定して、その２０％分のタン
ニンを連続的に投入した。この場合の流入水、および２
４時間処理後の処理水について、各濃度などおよび除去
率を表２（単位は表１と同じ）に示した。As an example, a concentration of 1 ppm was first added to the treatment tank.
The tannins were added so that 20% of the tannin was discharged outside the tank together with the outflow water, and 20% of the tannin was continuously added. Inflow water in this case, and 2
With respect to the treated water after the treatment for 4 hours, each concentration and the removal rate are shown in Table 2 (the unit is the same as in Table 1).
【００１５】なお、１週間後、１か月後についても引続
き調べた（表２参照）が、２４時間後と大差なく、安定
して処理できることがうかがわれる。また、余剰汚泥の
含水率および濾過速度の点でも、従来法より優れてい
る。Further, after one week and one month, the results were continuously examined (see Table 2), and it is apparent that the treatment can be performed stably, not much different from that after 24 hours. It is also superior to the conventional method in terms of water content of excess sludge and filtration rate.
【００１６】[0016]
【表１】 [Table 1]
【００１７】[0017]
【表２】 [Table 2]
【００１８】[0018]
【発明の効果】同濃度のＭＬＳＳを維持することで容積
負荷を上げることができ、装置を小型化でき、また、余
剰汚泥の含水率が低くなるので発生汚泥量を少なくで
き、用地の確保が難しい都会での処理場建設に有効であ
る。EFFECTS OF THE INVENTION By maintaining the same concentration of MLSS, the volume load can be increased, the apparatus can be downsized, and the water content of surplus sludge can be reduced, so the amount of sludge generated can be reduced and the site can be secured. Effective for construction of treatment plants in difficult cities.
─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成４年９月１１日[Submission date] September 11, 1992
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１２[Correction target item name] 0012
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００１２】[0012]
【実施例】ある団地の合併式浄化槽の実プラント（処理
対象人員５０４人、１日の汚水量１２６ｍ3 ）を用いて
処理を行った。EXAMPLES there actual plant merger type septic tank complex was treated with (processed personnel 504 people, sewage amount 126m 3 per day).
【手続補正２】[Procedure Amendment 2]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１３[Correction target item name] 0013
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００１３】比較例として、表１に今迄の平均的な処理
状況を示した。流入水および２４時間処理後の処理水の
ｐＨ、およびＢＯＤ、ＣＯＤ、ＳＳ、Ｔ−Ｎ（全窒素
分）、Ｔ−Ｐ（全リン分）の各濃度と除去率（％）を示
した。ＭＬＳＳ（曝気槽中の活性汚泥濃度）、ＳＶ
30（１リットルのメスシリンダーに活性汚泥を入れ、３
０分間静置したときの沈降汚泥の体積を％で表したも
の）、余剰汚泥の含水率（脱水ケーキ）、濾過速度も示
した。As a comparative example, Table 1 shows the average processing conditions so far. The pH of the influent water and the treated water after the treatment for 24 hours, and the concentrations of BOD, COD, SS, TN (total nitrogen content) and TP (total phosphorus content) and the removal rate (%) are shown. MLSS (concentration of activated sludge in aeration tank), SV
30 (Put activated sludge in a 1-liter graduated cylinder and
The volume of the sedimented sludge when left standing for 0 minutes is expressed in%), the water content of the excess sludge (dehydrated cake), and the filtration rate are also shown.
【手続補正３】[Procedure 3]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１６[Correction target item name] 0016
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００１６】[0016]
【表１】 [Table 1]
【手続補正４】[Procedure amendment 4]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１７[Correction target item name] 0017
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００１７】[0017]
【表２】 [Table 2]
Claims (3)
法において、活性汚泥にタンニンを存在せしめて廃水と
接触せしめることを特徴とする廃水の処理方法。1. A method for treating wastewater by contacting the wastewater with activated sludge, wherein tannin is present in the activated sludge and brought into contact with the wastewater.
り０．００１〜３００ｍｇである請求項１の廃水の処理
方法。2. The method for treating wastewater according to claim 1, wherein the amount of tannin present is 0.001 to 300 mg per liter of wastewater.
ターまたはニトロバクターである請求項１の廃水の処理
方法。3. The method for treating wastewater according to claim 1, wherein the activated sludge is Nitrosomonas, Aerobactor or Nitrobacter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4089991A JPH05253589A (en) | 1992-03-13 | 1992-03-13 | Treatment of waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4089991A JPH05253589A (en) | 1992-03-13 | 1992-03-13 | Treatment of waste water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05253589A true JPH05253589A (en) | 1993-10-05 |
Family
ID=13986098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4089991A Pending JPH05253589A (en) | 1992-03-13 | 1992-03-13 | Treatment of waste water |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05253589A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010053826A2 (en) * | 2008-11-07 | 2010-05-14 | General Electric Company | Method of conditioning mixed liquor using a tannin contaning polymer |
-
1992
- 1992-03-13 JP JP4089991A patent/JPH05253589A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010053826A2 (en) * | 2008-11-07 | 2010-05-14 | General Electric Company | Method of conditioning mixed liquor using a tannin contaning polymer |
| WO2010053826A3 (en) * | 2008-11-07 | 2010-07-01 | General Electric Company | Method of conditioning mixed liquor using a tannin contaning polymer |
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