JPH0683836B2 - Human waste treatment method - Google Patents
Human waste treatment methodInfo
- Publication number
- JPH0683836B2 JPH0683836B2 JP8973086A JP8973086A JPH0683836B2 JP H0683836 B2 JPH0683836 B2 JP H0683836B2 JP 8973086 A JP8973086 A JP 8973086A JP 8973086 A JP8973086 A JP 8973086A JP H0683836 B2 JPH0683836 B2 JP H0683836B2
- Authority
- JP
- Japan
- Prior art keywords
- biological reaction
- treatment
- liquid
- reaction tank
- concentrated
- 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 - Fee Related
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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/20—Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses
-
- 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
- Separation Using Semi-Permeable Membranes (AREA)
- Activated Sludge Processes (AREA)
- Treatment Of Sludge (AREA)
- Fertilizers (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、し尿処理方法に関する。TECHNICAL FIELD The present invention relates to a method for treating human waste.
し尿等の有機性汚泥を生物反応槽において活性汚泥処理
した際に発生する余剰汚泥は、資源化の観点から好気性
発酵処理してコンポスト化し、有機性肥料として使用さ
れることがある。Excess sludge generated when an organic sludge such as human waste is treated by an activated sludge in a bioreactor is sometimes used as an organic fertilizer by aerobic fermentation for composting from the viewpoint of recycling.
この肥料としての価値は、窒素、リン酸、カリに代表さ
れる成分の含有量により決定され、特にリン酸の含有量
が重要な要素となる。The value of this fertilizer is determined by the content of components represented by nitrogen, phosphoric acid, and potassium, and the content of phosphoric acid is an important factor.
ところで、し尿等の被処理液中に含まれるリン酸は、従
来、凝集沈澱処理により凝集汚泥としてほぼ全量回収さ
れているが、この凝集汚泥は脱水しても含水率が高く、
また、無機汚泥であるため発熱量の低い脱水ケーキとな
り、好気性発酵するのには適していないという問題があ
った。By the way, the phosphoric acid contained in the liquid to be treated such as human waste is conventionally recovered almost entirely as coagulated sludge by coagulating sedimentation treatment, but this coagulated sludge has a high water content even when dehydrated,
Further, since it is an inorganic sludge, it is a dehydrated cake with a low calorific value, which is not suitable for aerobic fermentation.
そこで、この発明は、被処理中に含まれるリン酸を凝集
沈澱することなく回収し、この回収したリン酸がコンポ
ストに含有されるし尿処理方法を提供することを目的と
する。Therefore, an object of the present invention is to provide a method for treating human waste, in which phosphoric acid contained in a subject to be treated is recovered without aggregation and precipitation, and the recovered phosphoric acid is contained in compost.
上記の問題点を解決するために、この発明は、し尿等の
被処理液を生物反応槽において活性汚泥処理すると共
に、上記生物反応槽から排出される余剰汚泥を好気性発
酵槽に投入して好気性発酵を行ないコンポスト化するし
尿処理方法において、上記生物反応槽内の混合液を限外
濾過膜処理して膜透過液と濃縮混合液とに分離した後、
濃縮混合液を上記生物反応槽に返送すると共に、膜透過
液を低圧浸透膜処理して処理液と濃縮液とに分離し、こ
の濃縮液を上記好気性発酵槽へ滴下するようにしたもの
である。In order to solve the above problems, the present invention performs activated sludge treatment of a liquid to be treated such as human waste in a biological reaction tank, and inputs excess sludge discharged from the biological reaction tank to an aerobic fermentation tank. In the human sewage treatment method of performing aerobic fermentation and composting, after separating the mixed solution in the biological reaction tank by ultrafiltration membrane treatment into a membrane permeate and a concentrated mixed solution,
While returning the concentrated mixed solution to the biological reaction tank, the membrane permeate is subjected to low-pressure permeation membrane treatment to separate into a processing solution and a concentrated solution, and the concentrated solution is added dropwise to the aerobic fermentation tank. is there.
この発明においては、生物反応槽内の混合液を限外濾過
膜処理して膜透過液と濃縮混合液とに分離した後、濃縮
混合液を上記生物反応槽に返送するようにしているの
で、生物反応処理後における混合液の凝集沈澱処理を省
略することができる。次に、限外濾過膜処理した膜透過
液を低圧逆浸透膜処理すれば、膜透過液中に含まれるCO
DMN、色度、リン酸は逆浸透膜を透過せず、CODMN、色
度、リン酸の濃縮液と、これらの物質が除去された処理
液に分離される。この濃縮液を好気性発酵槽へ滴下する
と、発酵汚泥の有するエネルギーによって濃縮液の水分
が蒸発し、濃縮液中のリン酸はリン酸ソーダ、リン酸カ
ルシウム等の粉末となり、リン酸分に富むコンポストが
得られる。In this invention, since the mixed solution in the biological reaction tank is subjected to ultrafiltration membrane treatment to separate into a membrane permeate and a concentrated mixed solution, the concentrated mixed solution is returned to the biological reaction tank. The coagulation-precipitation treatment of the mixed solution after the biological reaction treatment can be omitted. Next, if the membrane permeate subjected to the ultrafiltration membrane treatment is subjected to a low pressure reverse osmosis membrane treatment, the CO contained in the membrane permeate will be reduced.
D MN , chromaticity and phosphoric acid do not permeate the reverse osmosis membrane, and are separated into a concentrated solution of COD MN , chromaticity and phosphoric acid, and a treatment solution from which these substances have been removed. When this concentrated solution is dropped into the aerobic fermentation tank, the water content of the concentrated solution evaporates due to the energy of the fermentation sludge, and the phosphoric acid in the concentrated solution becomes powders of sodium phosphate, calcium phosphate, etc., and compost rich in phosphoric acid is formed. can get.
以下、この発明の実施例を説明する。 Examples of the present invention will be described below.
まず、し尿等の被処理液１に含まれる夾雑物や、繊維分
等のし渣３を除渣工程２において除去した後、被処理液
１を生物反応槽４に供給して活性汚泥処理する。First, after removing impurities such as human waste contained in the liquid to be treated 1 and residue 3 such as fibers in the residue removal step 2, the liquid to be processed 1 is supplied to the biological reaction tank 4 for active sludge treatment. .
上記除渣工程２において取除かれたし渣３及び上記生物
反応槽４から発生する余剰汚泥５を、好気性１次発酵槽
６、好気性２次発酵槽７に順次投入して好気性発酵を行
なってコンポスト化する。上記し渣３及び余剰汚泥５は
１次発酵槽６に投入する前に、それぞれ脱水機８、脱水
機９にによって脱水されている。上記し渣３の除去及び
脱水は、通常、極細目スクリーン及びスクリュープレス
脱水機を使用するが、遠心脱水機を使用することによっ
て除渣工程と脱水を同時に行なうようにしてもよい。ま
た、余剰汚泥の脱水に使用する脱水機９としては、フィ
ルタープレスが望ましいが、遠心脱水機を使用してもよ
い。上記し渣３及び余剰汚泥５を脱水することによって
発生する濾液10は生物反応槽４に投入される。The residue 3 removed in the removal step 2 and the surplus sludge 5 generated from the biological reaction tank 4 are sequentially charged into the aerobic primary fermentation tank 6 and the aerobic secondary fermentation tank 7 to perform aerobic fermentation. To compost. The residue 3 and the excess sludge 5 are dehydrated by a dehydrator 8 and a dehydrator 9, respectively, before being put into the primary fermentation tank 6. The residue 3 is usually removed and dehydrated by using an ultrafine screen and a screw press dehydrator, but a centrifugal dehydrator may be used to perform the residue removal process and dehydration at the same time. A filter press is preferable as the dehydrator 9 used for dehydrating the excess sludge, but a centrifugal dehydrator may be used. The filtrate 10 generated by dehydrating the residue 3 and the excess sludge 5 is put into the biological reaction tank 4.
上記好気性１次発酵槽６には、投入される余剰汚泥５等
の脱水ケーキ１の含水率に応じて返送コンポスト12が供
給され、１次発酵槽６内の発酵原料の含水率が60％程度
になるように調節される。例えば、返送コンポスト12の
含水率が50％、脱水ケーキ11の含水率が70％であれば、
それぞれの重量比を1:1にして１次発酵槽６へ投入す
る。Returning compost 12 is supplied to the aerobic primary fermentation tank 6 in accordance with the moisture content of the dehydrated cake 1 such as surplus sludge 5 to be fed, and the moisture content of the fermentation raw material in the primary fermentation tank 6 is 60%. It is adjusted to the extent. For example, if the water content of the returned compost 12 is 50% and the water content of the dehydrated cake 11 is 70%,
The weight ratio of each is set to 1: 1 and the mixture is put into the primary fermentation tank 6.
上記好気性１次発酵槽６及び好気性２次発酵槽７にはブ
ロア13によって空気が吹き込まれており、両発酵槽６、
７から排出される排ガス14は生物反応槽４に供給され、
生物脱臭が行なわれている。Air is blown into the aerobic primary fermentation tank 6 and the aerobic secondary fermentation tank 7 by a blower 13, and both fermentation tanks 6,
The exhaust gas 14 discharged from 7 is supplied to the biological reaction tank 4,
Biological deodorization is being performed.
上記生物反応槽４はブロア15によって曝気されている。
生物反応槽４において活性汚泥処理された混合液16は、
次に限外濾過膜処理17によって膜透過液18と濃縮混合液
19とに分離される。限外濾過膜処理17に使用する限外濾
過膜は材質、モジュール形状を問わず、孔径が0.2μｍ
以下のものがよい。The biological reaction tank 4 is aerated by a blower 15.
The mixed liquid 16 treated with activated sludge in the biological reaction tank 4 is
Next, by ultrafiltration membrane treatment 17, the membrane permeate 18 and the concentrated mixed solution
Separated into 19. The ultrafiltration membrane used in the ultrafiltration membrane treatment 17 has a pore size of 0.2 μm regardless of the material and module shape.
The following are good:
次いで、上記濃縮混合液19は生物反応槽４へ返送されて
再び活性汚泥処理され、膜透過液18は低圧逆浸透膜処理
20される。低圧逆浸透膜20は、５〜15kg/cm2程度の低圧
で供給することにより、液中の有機物、イオン等を物質
のイオン半径の大きさで排除するものであり、例えばNa
Cl等の１価の塩類は膜を透過するが、２価、３価の塩Ca
3(PO4)2、Na3PO4等やCOD物質は透過せず排除される。し
たがって、膜透過液18を低圧逆浸透膜処理20すれば、膜
透過液18中に含まれるCODMN、色度、リン酸は逆浸透膜
を透過せず、CODMN、色度、リン酸の濃縮液21と、これ
らの物質が除去された処理液22とに分離される。Next, the concentrated mixed liquid 19 is returned to the biological reaction tank 4 and treated again with activated sludge, and the membrane permeate 18 is treated with a low pressure reverse osmosis membrane.
Twenty. The low-pressure reverse osmosis membrane 20 removes organic substances, ions, etc. in the liquid by the size of the ionic radius of the substance by supplying at a low pressure of about 5 to 15 kg / cm 2 , for example, Na
Monovalent salts such as Cl pass through the membrane, but divalent and trivalent salts Ca
3 (PO 4 ) 2 , Na 3 PO 4, etc. and COD substances are not permeated and eliminated. Therefore, if the membrane permeate 18 is subjected to low-pressure reverse osmosis membrane treatment 20, COD MN , chromaticity, and phosphoric acid contained in the membrane permeate 18 do not permeate the reverse osmosis membrane, and COD MN , chromaticity, and phosphoric acid The concentrated liquid 21 and the treatment liquid 22 from which these substances have been removed are separated.
次に、上記濃縮液21を好気性２次発酵槽７へ滴下投入す
る。これにより、濃縮液21は、好気性２次発酵槽７にお
いて残存有機物の発酵により発生するエネルギーによっ
て水分が蒸発し、濃縮液21の中のリン酸はリン酸ソー
ダ、リン酸カルシウム等の粉末となり、リン酸分に富む
コンポスト23が得られる。Next, the concentrated liquid 21 is dropped into the aerobic secondary fermentation tank 7. As a result, the concentrated liquid 21 has its water content evaporated by the energy generated by the fermentation of the residual organic matter in the aerobic secondary fermentation tank 7, and the phosphoric acid in the concentrated liquid 21 becomes a powder of sodium phosphate, calcium phosphate, etc. A compost 23 rich in acid is obtained.
この発明によれば、以上のように、被処理液中のリンを
凝集沈澱処理することなく回収し、リン酸分に富むコン
ポストが得られるという効果を奏する。As described above, according to the present invention, phosphorus in the liquid to be treated can be recovered without coagulation-precipitation treatment, and a compost rich in phosphoric acid can be obtained.
図面はこの発明のし尿処理方法のフロートシートであ
る。 １……被処理液、４……生物反応槽、５……余剰汚泥、
６……好気性１次発酵槽、７……好気性２次発酵槽、16
……混合液、17……限外濾過膜処理、18……膜透過液、
19……濃縮混合液、20……低圧逆浸透膜処理、21……濃
縮液、22……処理液、23……コンポスト。The drawing is a float sheet of the method for treating human waste of the present invention. 1 ... Liquid to be treated, 4 ... Biological reaction tank, 5 ... Excess sludge,
6 …… Aerobic primary fermentation tank, 7 …… Aerobic secondary fermentation tank, 16
…… Mixed liquid, 17 …… Ultrafiltration membrane treatment, 18 …… Membrane permeation liquid,
19 …… Concentrated mixed solution, 20 …… Low-pressure reverse osmosis membrane treatment, 21 …… Concentrated solution, 22 …… Treated solution, 23 …… Compost.
Claims (1)
性汚泥処理すると共に、上記生物反応槽から排出される
余剰汚泥を好気性発酵槽に投入して好気性発酵を行ない
コンポスト化するし尿処理方法において、上記生物反応
槽の混合液を限外濾過膜処理して膜透過液と濃縮混合液
とに分離した後、濃縮混合液を上記生物反応槽に返送す
ると共に、膜透過液を低圧逆浸透膜処理して処理液と濃
縮液とに分離し、この濃縮液を上記好気性発行槽へ滴下
することを特徴とするし尿処理方法。Claims: 1. A liquid to be treated such as human waste is treated with activated sludge in a biological reaction tank, and excess sludge discharged from the biological reaction tank is put into an aerobic fermentation tank to perform aerobic fermentation to form compost. In the treatment method, the mixed solution in the biological reaction tank is subjected to an ultrafiltration membrane treatment to separate it into a membrane permeate and a concentrated mixed solution, and then the concentrated mixed solution is returned to the biological reaction tank, and the membrane permeated solution is subjected to low pressure. A method for treating human waste, which comprises performing reverse osmosis membrane treatment to separate a treatment liquid and a concentrated liquid, and dropping the concentrated liquid into the aerobic issuing tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8973086A JPH0683836B2 (en) | 1986-04-17 | 1986-04-17 | Human waste treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8973086A JPH0683836B2 (en) | 1986-04-17 | 1986-04-17 | Human waste treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62244494A JPS62244494A (en) | 1987-10-24 |
| JPH0683836B2 true JPH0683836B2 (en) | 1994-10-26 |
Family
ID=13978877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8973086A Expired - Fee Related JPH0683836B2 (en) | 1986-04-17 | 1986-04-17 | Human waste treatment method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0683836B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3815271A1 (en) * | 1988-05-05 | 1989-11-16 | Sandoz Ag | METHOD FOR CLEANING INDUSTRIAL SEWAGE |
| FR2744119B1 (en) * | 1996-01-29 | 1998-04-10 | Rhone Poulenc Chimie | PROCESS FOR TREATING AQUEOUS LIQUID EFFLUENTS CONTAINING ORGANIC AND MINERAL MATERIALS FOR THEIR RECOVERY |
| KR100377947B1 (en) * | 2000-11-17 | 2003-03-29 | 한국과학기술연구원 | Aqua-composting BNR Device and Method for Clearing Wastewater Employing the Same |
| JP5194783B2 (en) * | 2007-12-27 | 2013-05-08 | 栗田工業株式会社 | Biological treatment method and apparatus for water containing organic matter |
| JP5980474B2 (en) * | 2010-09-27 | 2016-08-31 | エムシー・ファーティコム株式会社 | Method for promoting phosphate absorption of crops and method for producing phosphate absorption promoting material using fertilizer made from fertilizer |
-
1986
- 1986-04-17 JP JP8973086A patent/JPH0683836B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62244494A (en) | 1987-10-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |