JPS6115760B2 - - Google Patents
Info
- Publication number
- JPS6115760B2 JPS6115760B2 JP18876881A JP18876881A JPS6115760B2 JP S6115760 B2 JPS6115760 B2 JP S6115760B2 JP 18876881 A JP18876881 A JP 18876881A JP 18876881 A JP18876881 A JP 18876881A JP S6115760 B2 JPS6115760 B2 JP S6115760B2
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- secondary treatment
- liquid
- tank
- colloidal
- 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
Links
- 239000010802 sludge Substances 0.000 claims description 26
- 239000007788 liquid Substances 0.000 claims description 19
- 239000010800 human waste Substances 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 13
- 238000000926 separation method Methods 0.000 claims description 13
- 239000000084 colloidal system Substances 0.000 claims description 8
- 238000001179 sorption measurement Methods 0.000 claims description 6
- 238000001556 precipitation Methods 0.000 claims description 4
- 239000006228 supernatant Substances 0.000 claims description 4
- 210000002700 urine Anatomy 0.000 claims description 4
- 239000002244 precipitate Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 2
- 238000003756 stirring Methods 0.000 description 10
- 238000002156 mixing Methods 0.000 description 8
- 238000005187 foaming Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000010790 dilution Methods 0.000 description 4
- 239000012895 dilution Substances 0.000 description 4
- 238000004062 sedimentation Methods 0.000 description 4
- 230000008719 thickening Effects 0.000 description 4
- 239000000758 substrate Substances 0.000 description 3
- 238000005273 aeration Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000002518 antifoaming agent Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000004042 decolorization Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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)
Description
この発明は生し尿の無希釈処理における発泡を
低減させるし尿処理方法に関する。
従来の生し尿の処理方法は、前処理として生し
尿をドラムスクリーン等を通過させた後、好気性
消火法、活性汚泥法等により、10〜20倍希釈を行
い処理している。
ところで、近年の水資源の浪費防止、水質総量
規制の実施などから、し尿処理プロセスにおける
希釈水の節約が課題となり、近年では無希釈処理
は必須技術となつてきている。
しかしながら、希釈水を減少させると、脱色、
固液分離の困難性という問題の他に、ばつ気槽で
の発泡が著しくなり外観を損ねるという欠点があ
る。この欠点を解決手段として経費のかかる消泡
剤を使用しているのが現状である。
この発明は、上記欠点を解決するに際し、発泡
基質であるコロイド成分の除去ということに着目
し、前処理段階で生し尿と２次処理汚泥とを混合
撹拌し、コロイド成分を除去して、発泡を低減さ
せたし尿処理方法を提供することを目的とする。
以下、この発明の一実施例について図面を参照
して説明する。
この発明の一実施例の工程には、生し尿と２次
処理汚泥とを混合撹拌しコロイド成分の吸着を行
なわせる混合撹拌１と、この混合撹拌槽１からの
混合液の固液分離を行い、コロイド成分を沈殿さ
せる分離槽２と、この分離槽２の沈殿汚泥の濃縮
を行う汚泥濃縮槽３と、上記分離槽２の上層部の
上澄液を処理する２次処理部４と、この２次処理
部４からの２次処理液の沈殿を行う沈殿槽５とが
配置されている。
次にこの発明の動作について説明する。
処理されるべきし尿は後述する沈殿槽５から返
送された２次処理沈殿汚泥（引抜汚泥）と一緒に
混合撹拌槽１に導入され、混合撹拌されて、発泡
基質であるコロイド成分を汚泥に吸着させる。
（コロイド成分吸着工程）
ここでコロイド成分を効果的に吸着させるため
にし尿の混合撹拌槽１の滞留時間は30分〜２時間
程度とする。
そして、上記混合撹拌槽１の混合液は分離槽２
に導入され、固液分離されて、上層部と、コロイ
ド成分を吸着した汚泥等の沈殿物を含む下層部と
に分離される（コロイド成分吸着工程）。
この上層部と下層部の分析値を表に示すと以下
のようである。
The present invention relates to a method for treating human waste that reduces foaming during undiluted treatment of human waste. Conventional methods for processing raw human waste include passing the raw human waste through a drum screen or the like as a pretreatment, and then diluting it 10 to 20 times using an aerobic extinguishing method, an activated sludge method, or the like. By the way, in recent years, due to the prevention of waste of water resources and the implementation of total water quality regulations, saving dilution water in the human waste treatment process has become an issue, and non-dilution treatment has become an essential technology in recent years. However, reducing the dilution water causes decolorization,
In addition to the problem of difficulty in solid-liquid separation, there is a disadvantage that foaming in the aeration tank becomes significant and the appearance deteriorates. Currently, as a solution to this drawback, expensive antifoaming agents are used. In order to solve the above-mentioned drawbacks, this invention focuses on the removal of colloidal components, which are foaming substrates, and mixes and stirs human urine and secondary treatment sludge in the pre-treatment stage to remove colloidal components and foam. The purpose of the present invention is to provide a human waste disposal method that reduces the amount of waste. An embodiment of the present invention will be described below with reference to the drawings. The process of an embodiment of the present invention includes mixing and stirring 1 in which human waste and secondary treated sludge are mixed and stirred to adsorb colloid components, and solid-liquid separation of the mixed liquid from this mixing and stirring tank 1. , a separation tank 2 for precipitating colloidal components, a sludge concentration tank 3 for concentrating the precipitated sludge in this separation tank 2, a secondary treatment section 4 for treating the supernatant liquid in the upper layer of the separation tank 2, and A sedimentation tank 5 for sedimenting the secondary treatment liquid from the secondary treatment section 4 is arranged. Next, the operation of this invention will be explained. The human waste to be treated is introduced into the mixing and stirring tank 1 together with the secondary treatment settled sludge (drawn sludge) returned from the settling tank 5, which will be described later, and is mixed and stirred to adsorb colloidal components, which are foaming substrates, into the sludge. let
(Colloid Component Adsorption Step) Here, in order to effectively adsorb the colloid components, the residence time of the human waste in the mixing stirring tank 1 is set to about 30 minutes to 2 hours. The mixed liquid in the mixing and stirring tank 1 is then transferred to a separating tank 2.
The solid-liquid is separated into an upper layer and a lower layer containing precipitates such as sludge that have adsorbed colloidal components (colloidal component adsorption step). The analysis values for the upper and lower parts are shown in the table below.
【表】
ここで、分離槽２の固液分離効果をより効果的
に行うためには、メタン発酵が起こり、ガス発生
による撹拌がはじまらない範囲でなるべく長い滞
留時間が必要であり、２〜５日程度がよい。また
コロイド成分等の沈殿を効率よく行うために、必
要に応じて沈降助剤として汚泥焼却灰を投入して
もよい。
さらに、分離槽２の上槽部の２次処理流出側に
壁６を設け、スカムの流出や混合し尿の短絡流、
巻き上りによるSSの流出を防ぐ。
次に分離槽２の下層部に沈殿したコロイド成分
を吸着した沈殿汚泥は汚濃縮槽３に送られる。こ
の汚泥濃縮槽３は分離槽２の安全的機能をも有
し、滞留時間として約12時間程度を有し、沈殿汚
泥を分離液と、コロイド成分を吸着した余剰汚泥
とに分離する（汚泥濃縮工程）。そして上記分離
液は上記混合撹拌槽１へ返送され、余剰汚泥は外
部へ排出される。
他方、分離槽２の上層部の上澄液は２次処理の
ためにばつ気処理を主とする２次処理部４へ送ら
れる（２次処理工程）。
この２次処理部４への供給の際、上述のように
発泡の原因基質であるし尿中のコロイド成分は上
記吸着工程から沈殿工程を経る間にほとんど除去
されているので、無希釈処理であつても発泡は著
しく低減する。しかも、し尿中のSS等も上記一
連の工程を経る間に除去されるために、被処理有
機物量が減少し、コロイド成分のBODへの移行
が非常に少なくなるので、２次処理部４での汚泥
生成量も低減される。さらにSS流入量、汚泥生
成量が減少されるので２次処理部４で接触酸化も
可能となる。
そして最後に２次処理部４からの２次処理液は
さらに沈殿槽５へ供給され、この沈殿槽５で固液
分離されて、２次処理沈殿物の一部は２次処理汚
泥（引抜汚泥）として上記混合撹拌槽１へ返送
（２次処理汚泥返送工程）され、該沈殿物の残り
は２次処理部４へ返送される。他方、上澄液は処
理水として放流される。
以上のようにこの発明のし尿処理方法によれ
ば、処理において発泡を低減し、しかも汚泥生成
量をも減少できる等の極めて優れた効果である。[Table] Here, in order to make the solid-liquid separation effect of separation tank 2 more effective, it is necessary to have as long a residence time as possible within the range where methane fermentation occurs and stirring due to gas generation does not start. About a day is good. Furthermore, in order to efficiently precipitate colloidal components, etc., sludge incineration ash may be added as a sedimentation aid, if necessary. Furthermore, a wall 6 is provided on the secondary treatment outflow side of the upper tank part of the separation tank 2 to prevent the outflow of scum and the short-circuit flow of mixed human urine.
Prevents SS from flowing out due to rolling up. Next, the precipitated sludge adsorbing the colloid components precipitated in the lower layer of the separation tank 2 is sent to the sewage thickening tank 3. This sludge thickening tank 3 also has the safety function of the separation tank 2, has a residence time of about 12 hours, and separates settled sludge into a separated liquid and excess sludge that has adsorbed colloid components (sludge thickening tank 3). process). The separated liquid is then returned to the mixing and stirring tank 1, and excess sludge is discharged to the outside. On the other hand, the supernatant liquid in the upper layer of the separation tank 2 is sent for secondary treatment to the secondary treatment section 4 which mainly performs aeration treatment (secondary treatment step). During the supply to the secondary treatment section 4, most of the colloidal components in human urine, which are the substrates that cause foaming, are removed during the adsorption process and the precipitation process, as described above, so the process is performed without dilution. However, foaming is significantly reduced. Moreover, since SS etc. in human waste are also removed during the above series of steps, the amount of organic matter to be treated is reduced and the transfer of colloidal components to BOD is extremely reduced. The amount of sludge produced is also reduced. Furthermore, since the SS inflow amount and the sludge generation amount are reduced, catalytic oxidation is also possible in the secondary treatment section 4. Finally, the secondary treatment liquid from the secondary treatment section 4 is further supplied to the sedimentation tank 5, where it is separated into solid and liquid. ) is returned to the mixing stirring tank 1 (secondary treatment sludge return step), and the remainder of the sediment is returned to the secondary treatment section 4. On the other hand, the supernatant liquid is discharged as treated water. As described above, the human waste treatment method of the present invention has extremely excellent effects such as reducing foaming during treatment and also reducing the amount of sludge produced.
図はこの発明方法の一実施例を示すフローシー
トを示す。
１……混合撹拌槽、２……分離槽、３……汚泥
濃縮槽、４……２次処理部、５……沈殿槽。
The figure shows a flow sheet showing one embodiment of the method of this invention. 1... Mixing stirring tank, 2... Separation tank, 3... Sludge thickening tank, 4... Secondary treatment section, 5... Sedimentation tank.
Claims (1)
処理汚泥を混合撹拌し、該２次処理汚泥にし尿中
のコロイド成分を吸着させるコロイド成分吸着工
程と、このコロイド成分吸着工程からの混合液を
固液分離し、上記コロイド成分を沈殿させるコロ
イド成分沈殿工程と、このコロイド成分沈殿工程
からの沈殿物を濃縮する汚泥濃縮工程と、上記コ
ロイド成分沈殿工程での上澄液を２次処理する２
次処理工程と、この２次処理工程で処理された２
次処理液を固液分離し、沈殿した２次処理汚泥の
一部を上記コロイド成分吸着工程へ返送する２次
処理汚泥返送工程とを備えたし尿処理方法。1. A colloid component adsorption step in which highly concentrated human waste to be treated and secondary treatment sludge (described later) are mixed and stirred, and the colloid component in the urine is adsorbed in the secondary treatment sludge, and the mixed liquid from this colloid component adsorption step is A colloidal component precipitation step in which solid-liquid separation is performed and the colloidal component is precipitated, a sludge concentration step in which the precipitate from this colloidal component precipitation step is concentrated, and the supernatant liquid in the colloidal component precipitation step is subjected to secondary treatment 2
The next treatment step and the two treated in this second treatment step.
A method for treating human waste comprising a secondary treatment sludge return step of separating a secondary treatment liquid into solid and liquid and returning a part of the precipitated secondary treatment sludge to the colloidal component adsorption step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56188768A JPS5889992A (en) | 1981-11-25 | 1981-11-25 | Treatment for night soil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56188768A JPS5889992A (en) | 1981-11-25 | 1981-11-25 | Treatment for night soil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5889992A JPS5889992A (en) | 1983-05-28 |
| JPS6115760B2 true JPS6115760B2 (en) | 1986-04-25 |
Family
ID=16229433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56188768A Granted JPS5889992A (en) | 1981-11-25 | 1981-11-25 | Treatment for night soil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5889992A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6372394A (en) * | 1986-05-29 | 1988-04-02 | Tsurumi Mfg Co Ltd | Method and apparatus for treating sewage |
| JP3760815B2 (en) | 2001-07-27 | 2006-03-29 | 株式会社日立製作所 | Video display device |
| JP6533676B2 (en) * | 2015-03-17 | 2019-06-19 | 水ｉｎｇ株式会社 | Water treatment apparatus and water treatment method |
| JP2016172236A (en) * | 2015-03-17 | 2016-09-29 | 水ｉｎｇ株式会社 | Apparatus and method for treating water |
-
1981
- 1981-11-25 JP JP56188768A patent/JPS5889992A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5889992A (en) | 1983-05-28 |
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