JP2002086180A - Waste water treating method and waste water treating facility by aeration and fermentation decomposition - Google Patents

Waste water treating method and waste water treating facility by aeration and fermentation decomposition

Info

Publication number
JP2002086180A
JP2002086180A JP2000324653A JP2000324653A JP2002086180A JP 2002086180 A JP2002086180 A JP 2002086180A JP 2000324653 A JP2000324653 A JP 2000324653A JP 2000324653 A JP2000324653 A JP 2000324653A JP 2002086180 A JP2002086180 A JP 2002086180A
Authority
JP
Japan
Prior art keywords
treatment
organic matter
wastewater
tank
aeration
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
Application number
JP2000324653A
Other languages
Japanese (ja)
Other versions
JP3562760B2 (en
Inventor
Akimichi Kobayashi
昭道 小林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to JP2000324653A priority Critical patent/JP3562760B2/en
Publication of JP2002086180A publication Critical patent/JP2002086180A/en
Application granted granted Critical
Publication of JP3562760B2 publication Critical patent/JP3562760B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • 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
    • Y02W10/20—Sludge processing

Landscapes

  • Activated Sludge Processes (AREA)
  • Treatment Of Sludge (AREA)

Abstract

PROBLEM TO BE SOLVED: To solve the problems in dealing with environmental conservation as the treatment and disposal of the organic sludge discharged as excess sludge, etc., and associated themes in the conventional waste water treatment (activated sludge method). SOLUTION: The organic matter in the waste water to be treated is segmented and incorporated respectively into sewage and mud water by the characteristics thereof. The organic matter in the sewage is subjected to aeration decomposition treatment and the organic matter in the mud water to fermentation decomposition treatment, by which the entire amount organic matter included in the waste water to be treated is made into the object for the decomposition treatment. The integral and parallel implementation of the cleaning and composting of the waste water to be treated is eventually made possible, by which the simultaneous and integral solution of the problems of the treatment and disposal of the sludge in the conventional method and the problems relating to the environmental conservation is thus made possible.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】この発明は、し尿及び雑排水
を主とする生活排水をはじめ有機物を含む各種排水を生
物的に処理する、通称「活性汚泥法」と呼ばれる排水の
浄化処理方法とその処理施設に係るものであって、特に
中小規模を対象とした農業集落排水に適した排水処理方
法とその処理施設に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for purifying wastewater, commonly called "activated sludge method", for biologically treating various wastewater containing organic matter such as domestic wastewater mainly containing human waste and gray water, and a method therefor. The present invention relates to a treatment facility, and particularly to a wastewater treatment method and a treatment facility suitable for drainage of agricultural settlements for small and medium-sized enterprises.

【０００２】[0002]

【従来の技術】生活排水など有機物を含む各種排水を生
物的に処理する方法として前記活性汚泥法は周知であ
る。この活性汚泥法は、好気性の微生物と汚水とをばっ
気槽内で混合接触させ汚水のＢＯＤ成分を溶存酸素の存
在下で酸化分解し、その混合液を沈殿槽（沈降分離槽）
において固液分離させ、上澄水と沈降汚泥に分離し上澄
水は処理水として河川に放流し、フロック化して沈降し
た汚泥（沈降汚泥）はその一部を前記ばっ気分解槽へ返
送し、再度汚水のＢＯＤ除去に利用する操作の繰り返し
により被処理排水の浄化を行うものである。2. Description of the Related Art The activated sludge method is well known as a method for biologically treating various wastewater containing organic matter such as domestic wastewater. In this activated sludge method, aerobic microorganisms and sewage are mixed and contacted in an aeration tank to oxidatively decompose the BOD component of the sewage in the presence of dissolved oxygen, and the mixture is settled in a settling tank (sedimentation separation tank).
, And separated into supernatant water and settled sludge, and the supernatant water is discharged to a river as treated water, and the sludge that has settled by flocking (settled sludge) is partially returned to the aeration decomposition tank, and again. The wastewater to be treated is purified by repeating the operation used for removing the BOD of the wastewater.

【０００３】今日、この処理法は標準活性汚泥法として
比較的大規模な都市下水の終末処理施設等に多く採用さ
れていると共に、長時間滞留型として、中小規模の汚水
処理施設での採用も目立っている。しかも処理施設に対
する被処理排水の流入量や負荷の変動に対する運転上の
ノウハウ、維持管理上の経験知識及び構造上の対応等も
ほぼ集約され、各種規模の排水処理法として広く普及
し、評価を受けている。[0003] At present, this treatment method is widely used as a standard activated sludge method in relatively large-scale sewage treatment facilities for municipal sewage and the like, and is also employed in small and medium-sized sewage treatment facilities as a long-term residence type. Standing out. In addition, the operational know-how, the operational knowledge and the structural response to fluctuations in the inflow and load of the wastewater to be treated into the treatment facility, and almost all of its structural measures, etc., are almost integrated. is recieving.

【０００４】[0004]

【発明が解決しようとする課題】ところで、この活性汚
泥法をとる排水処理施設においては、どのような方式を
採用するにしろ、ばっ気分解処理後の混合液を固液分離
させる沈降分離槽（沈殿槽）において沈降（沈殿）分離
された汚泥（沈降汚泥）が（一部返送汚泥として利用さ
れるものを除き大部分が）余剰汚泥として蓄積される。In a wastewater treatment facility employing this activated sludge method, a sedimentation separation tank (solid-liquid separation) for the mixed solution after the aerated decomposition treatment is adopted regardless of the method employed. The sludge settled (sedimented) in the sedimentation tank (sedimentation sludge) is accumulated as surplus sludge (mostly except for partly used as returned sludge).

【０００５】そこで現在では、その蓄積された余剰汚泥
を沈降分離槽（沈殿槽）より引き抜き、農村型において
は別途集合型汚泥処理施設等へ搬出する方法が最も多く
採用され、都市型においては最初沈殿池汚泥と共に焼却
処分とするか、さらに焼却灰を建築資材に再生すると
か、事例は少ないが脱水処理して発酵分解させ堆肥（コ
ンポスト）化するなどの再利用法なども提案され実施さ
れている。At present, the most common method is to extract the accumulated excess sludge from a sedimentation tank (sedimentation tank) and carry it out to a separate sludge treatment facility or the like in a rural type. Recycling methods such as incineration with sedimentation tank sludge or recycling of incineration ash into building materials have been proposed and implemented, although there are few cases, such as dehydration, fermentation and decomposition to compost. I have.

【０００６】しかし、いずれの試みも、本来の汚水処理
施設の系外に、（例えば建築資材や堆肥化するための）
専用の施設を設置して自然還元等を行うようにしてい
る。その結果、例えば汚泥を堆肥化する場合、排水施設
の系外に専用のコンポスト化施設の建設が必要となりそ
の建設費や、発生した汚泥をその発生した施設から再生
施設（ほとんどが他の場所に設置されている）へ搬入し
なければならずその経費など、排水処理全体に関連する
各種経費のコストアップを招かざるを得ない要因とさえ
なっている場合が多い。特にこの傾向は中小規模、例え
ば農業集落排水の処理施設建設に関連して大きく（汚泥
については他の集合型汚泥処理施設等への搬出がほとん
どのケースを占めるため）、農業集落排水処理施設普及
の、今後のネックともなりかねない問題を含んでいる。[0006] However, all of these attempts are carried out outside the system of the original sewage treatment facility (for example, for building materials or composting).
A dedicated facility has been set up to return nature. As a result, for example, when composting sludge, it is necessary to construct a dedicated composting facility outside the drainage system, and the construction cost and the sludge generated from the facility where the sludge was generated to a recycling facility (mostly in other places) In many cases, the cost of the wastewater treatment must be increased, such as the cost of the wastewater treatment. In particular, this tendency is large in relation to the construction of small and medium scale agricultural wastewater treatment facilities (since sludge is mostly transported to other collective sludge treatment facilities, etc.). However, it contains problems that could be a bottleneck in the future.

【０００７】この発明は、このような問題を解消した排
水処理施設の建設を目的とし、処理の過程において、処
理方法に応じてさまざまな態様で残留する有機性汚泥の
堆肥土化を、汚水の浄水化と一体的並立的に同一排水処
理系内において行うことを可能とした、排水処理方法と
その排水処理施設を提供するものであり、特に地域性が
強く、また中小規模を対象とする農業集落排水の、汚水
の浄水化と有機性汚泥の堆肥土化を一体・並立化させる
ことは、立地的及び規模的条件を最大限に活用・配慮す
ることにつながる。[0007] The present invention aims at constructing a wastewater treatment facility that solves such a problem, and in the course of treatment, composting of organic sludge that remains in various modes depending on the treatment method is performed, and the wastewater is treated as compost. A wastewater treatment method and a wastewater treatment facility that can be performed in the same wastewater treatment system in parallel with water purification. Integrating and purifying the wastewater purification of the settlement drainage and the composting of organic sludge leads to the maximum use and consideration of the location and scale conditions.

【０００８】[0008]

【課題を解決するための手段】まず処理方法の特徴とす
るところは、被処理排水を主として浮遊性及び溶解性有
機物を含む汚水と、同じく沈降性有機物を含む泥水とに
区分（分離）することにある。そして、この区分した浮
遊性及び溶解性有機物（を含む汚水）をばっ気分解処理
したのち固液分離し、上澄水と残留沈降性有機物とに再
分離のうえ上澄水は放流するようにした。他方、当初の
沈降性有機物を含む区分泥水は、ばっ気分解処理後の残
留沈降性有機物を含む分離泥水と共に脱水処理ののち、
発酵分解処理し堆肥土化することとした。すなわち、被
処理排水中に含まれる全量有機物処理の対応策として、
ばっ気分解処理と発酵分解処理という二つの分解処理方
法を並立的に採用することにより、主として浮遊性及び
溶解性の有機物を含む汚水と同じく沈降性有機物及び残
留沈降性有機物を含む区分及び分離泥水の、一体的かつ
同水準的な分解処理が可能となり、従来の排水処理方法
が抱えていた別分野としての汚泥処理の問題が、排水処
理と同一系内の中で浄水化と同次元的に解決できること
とした。First, the feature of the treatment method is to separate (separate) the wastewater to be treated into sewage mainly containing buoyant and soluble organic matter and muddy water containing the same sedimentable organic matter. It is in. Then, the separated floating and soluble organic matter (including wastewater) was subjected to aeration decomposition treatment, and then subjected to solid-liquid separation. The supernatant water and the residual sedimentable organic matter were separated again, and the supernatant water was discharged. On the other hand, the initially classified mud containing sedimentable organic matter is dehydrated together with the separated muddy water containing residual sedimentable organic matter after aeration decomposition,
The fermentation decomposition treatment was performed and composted. In other words, as a countermeasure for the treatment of total organic matter contained in the treated wastewater,
By adopting two decomposition treatment methods, aerobic decomposition treatment and fermentation decomposition treatment, in parallel, separation and separation mud containing sedimentable organic matter and residual sedimentable organic matter as well as sewage containing mainly floating and soluble organic matter However, the problem of sludge treatment as a separate field that the conventional wastewater treatment method had was one of the same issues as wastewater treatment. I decided to solve it.

【０００９】次に上記処理方法を実施する装置として、
被処理排水を浮遊性及び溶解性有機物を含む汚水と沈降
性有機物を含む泥水とに区分（分離）する手段として、
まず沈降区分槽を設置した。そしてこの沈降区分槽にそ
れぞれ汚水処理系のフローと泥水処理系のフローとの二
系統を接続した。ついで汚水処理系には、ばっ気分解槽
と固液分離する沈降分離槽（ないし沈殿槽）からなるば
っ気分解処理設備を組み込み、他方、泥水処理系統のフ
ローには、脱水装置と発酵分解槽からなる発酵分解処理
設備を組み込み、双方で被処理排水に含まれる全量有機
物の分解処理を行わせる施設構成とした。Next, as an apparatus for carrying out the above processing method,
As a means to separate (separate) the treated wastewater into sewage containing floating and soluble organic matter and muddy water containing sedimentable organic matter,
First, a sedimentation tank was installed. The sedimentation tank was connected to two systems, a sewage treatment system flow and a muddy water treatment system flow. Next, the wastewater treatment system incorporates an aeration decomposition equipment consisting of an aeration decomposition tank and a sedimentation separation tank (or sedimentation tank) for solid-liquid separation. On the other hand, the flow of the muddy water treatment system includes a dehydrator and a fermentation decomposition tank. A fermentation decomposition treatment facility consisting of is constructed, and both are configured to decompose all organic matter contained in the wastewater to be treated.

【００１０】[0010]

【発明の実施の形態】図１は、この発明に係る排水処理
方法の基本的な処理フローを示すものである。FIG. 1 shows a basic processing flow of a wastewater treatment method according to the present invention.

【００１１】[0011]

【実施例】図２は、本発明による排水処理方法を適用し
た場合の農業集落排水の処理施設の具体的な処理フロー
を示すが、処理対象人数は約５００〜５，０００人規模
のいわゆる中小規模の処理施設である。まず、図２にお
いて前処理装置１は、流入してきた被処理排水のいわゆ
る前処理装置で、従来の農業集落排水処理施設に適用さ
れているものと同様な機能を持つ装置である。ばっ気調
整槽２は、標準活性汚泥法における予備エアレーション
タンクと長時間滞留型の流量調整槽の機能を両備したも
のである。これは、後述する沈降区分槽３における汚水
と泥水との沈降分離を、標準活性汚泥法における最初沈
殿池での汚泥の沈殿分離と同様に、効率的に促進させる
予備エアレーションと中小規模の排水処理施設が附随的
な問題として抱えている被処理排水量の変動を主原因と
する、各種負荷変動に対応させるための流量調整機能を
両立的要件とするためのものであり、ばっ気調整槽の存
在は、沈降区分槽の有効的活用にとって、臨場的に不可
欠といえる。なお、実施例ではばっ気調整槽２の容量は
農業集落排水施設設計指針による流量調整槽と同等の６
時間以上とした。ただし実質的なばっ気調整槽２のばっ
気時間は、被処理排水のＢＯＤ量や沈降効率等を配慮し
決定することが好ましい。FIG. 2 shows a concrete treatment flow of an agricultural settlement wastewater treatment facility when the wastewater treatment method according to the present invention is applied. It is a processing facility of a scale. First, in FIG. 2, a pretreatment device 1 is a so-called pretreatment device for inflowing treated wastewater, and has a function similar to that applied to a conventional agricultural settlement wastewater treatment facility. The aeration control tank 2 has both a function of a preliminary aeration tank in the standard activated sludge method and a function of a long-term residence type flow control tank. This is the same as the preliminary aeration and medium- and small-scale wastewater treatment that efficiently promote the sedimentation and separation of sewage and muddy water in the sedimentation tank 3 described later, similarly to the sedimentation and separation of sludge in the first sedimentation basin in the standard activated sludge method. The purpose of the facility is to provide a flow control function to cope with various load fluctuations, mainly due to fluctuations in the amount of wastewater to be treated, which is an incidental problem of the facility. Can be said to be practically indispensable for the effective use of the sedimentation tank. In the embodiment, the capacity of the aeration control tank 2 is 6 equivalent to that of the flow control tank according to the agricultural village drainage facility design guidelines.
It was more than time. However, it is preferable that the substantial aeration time of the aeration adjusting tank 2 is determined in consideration of the BOD amount of the wastewater to be treated, the sedimentation efficiency, and the like.

【００１２】次に沈降区分槽３は、本発明方法を実施す
る上で主要な役割機能を果たすもので、被処理排水を浮
遊性及び溶解性有機物を含む汚水と沈降性有機物を含む
泥水とに区分（分離）し、以後その汚水と泥水を汚水処
理系４及び泥水処理系５の系統に分けてフローさせるよ
うにした。なお、この沈降区分槽３は、表面的には従来
の最初沈殿槽の役割と共通した役割を備えたものである
が、本質的には被処理排水を汚水と泥水とに区分（分
離）することによって、以後のばっ気分解発酵分解によ
る処理を同水準的並立的に行わしめるための役割をもた
せたものである。実施例でこの沈降区分槽３の容量は、
下水道施設計画設計指針と解説における標準活性汚泥法
による最初沈殿池に係わる設計指針に基づいて設計し
た。Next, the sedimentation tank 3 plays a major role in carrying out the method of the present invention, and converts the wastewater to be treated into sewage containing floating and soluble organic matter and muddy water containing sedimentable organic matter. The sewage and muddy water were separated (separated), and thereafter separated into a sewage treatment system 4 and a muddy water treatment system 5 so as to flow. The sedimentation separation tank 3 superficially has the same role as the conventional first sedimentation tank, but essentially separates (separates) the wastewater to be treated into sewage and muddy water. This has a role to make the subsequent processing by aerobic fermentation decomposition at the same level and parallel. In the embodiment, the capacity of the settling tank 3 is:
It was designed based on the design guideline for the primary sedimentation tank by the standard activated sludge method in the sewerage facility plan design guideline and explanation.

【００１３】次に、汚水処理系４と泥水処理系５の二つ
の処理系４、５には、図２で示すようなばっ気分解処理
設備と発酵分解処理設備を組み込んだ。まず汚水処理系
４には、浮遊性及び溶解性有機物を含む汚水のばっ気分
解槽４１、沈降分離槽４２、滅菌槽４３からなるばっ気
分解処理設備４４を組み込んだ。なお、ばっ気分解槽４
１の容量は、前段の沈降区分槽３における沈降効率や被
処理排水中のＢＯＤ量とＭＬＳＳ濃度やＤＯ等の関連及
び被処理排水の負荷変動等を配慮して設定することが好
ましい。実施例では、農業集落排水施設設計指針・及び
下水道施設計画・設計指針と解説における標準活性汚泥
法等の設計指針を参考とし、さらに安全性を加味し以下
の計算式により容量を決定することとした。 容量＝Ｖ 対象人数＝Ｎ とする Ｖ＝（０．１２Ｎ＋３０）ｍ３ Next, an aeration decomposition treatment facility and a fermentation decomposition treatment facility as shown in FIG. 2 were incorporated in two treatment systems 4, 5 of a sewage treatment system 4 and a muddy water treatment system 5. First, in the sewage treatment system 4, an aeration decomposition treatment facility 44 including a sewage aeration decomposition tank 41, a sedimentation separation tank 42, and a sterilization tank 43 containing spillable and soluble organic matter was incorporated. In addition, the aeration decomposition tank 4
The capacity of 1 is preferably set in consideration of the sedimentation efficiency in the settling tank 3 in the preceding stage, the relationship between the BOD amount and the MLSS concentration and DO in the wastewater to be treated, the load fluctuation of the wastewater to be treated, and the like. In the embodiment, referring to the design guideline such as the standard activated sludge method in the agricultural settlement drainage facility design guideline and the sewerage facility plan / design guideline and commentary, and further considering safety, determine the capacity by the following formula. did. Capacity = V Number of target persons = N V = (0.12N + 30) m 3

【００１４】沈降分離槽４２は、前段のばっ気分解槽４
１において酸化分解されそれ以上分解不可能となった残
留有機物を含む汚水を、上澄水と残留沈降性有機物から
なる沈降汚泥水に分離させる役割をもたせたものであ
る。そして分離された上澄水は滅菌槽４３を介して処理
水として河川に放流し、沈降汚泥水は分離泥水として次
に説明する泥水処理系５の混合貯留槽５１に送り込み、
必要に応じ一部は前段のばっ気分解槽４１及びばっ気調
整槽２に返送するように構成した。なおこの実施例で
は、沈降分離槽４２の容量を農業集落排水施設設計指針
の沈殿槽と同じく３時間以上に設計した。The sedimentation / separation tank 42 is provided in the first stage
In this method, the wastewater containing residual organic matter that has been oxidatively decomposed and cannot be decomposed any more is separated into settled sludge water consisting of supernatant water and residual sedimentable organic matter. Then, the separated supernatant water is discharged into a river as treated water via a sterilization tank 43, and the settled sludge water is sent to a mixed storage tank 51 of a mud water treatment system 5 described below as separated mud water,
If necessary, a portion was returned to the aeration decomposition tank 41 and the aeration adjustment tank 2 at the preceding stage. In this example, the capacity of the sedimentation / separation tank 42 was designed to be 3 hours or more in the same manner as the sedimentation tank in the agricultural settlement drainage facility design guideline.

【００１５】泥水処理系５の構成は、図２の左側に示す
ように混合貯留槽５１、脱水装置５２、発酵分解槽５
３、発酵調整槽５４からなる発酵分解処理設備５５を組
み込んだ構成とした。まず、混合貯留槽５１は、前記沈
降区分槽３において区分された泥水を前記沈降分離槽４
２において分離された沈降汚泥水（正確にいうと未分解
の残留沈降性有機物を含む分離泥水）と混合し、貯留さ
せておくためのものであると同時に、混合泥水を次段の
脱水装置５２に定量的に移送するための補助的な機能を
もたせたものである。The configuration of the muddy water treatment system 5 is as shown on the left side of FIG.
3. A configuration in which a fermentation decomposition treatment facility 55 including a fermentation adjustment tank 54 is incorporated. First, the mixed storage tank 51 separates the muddy water separated in the sedimentation separation tank 3 from the sedimentation separation tank 4.
2 to mix with the sedimented sediment separated in the second step (more precisely, separated muddy water containing undecomposed residual sedimentable organic matter) and to store the mixed muddy water in the next stage of the dehydrating device 52. It has an auxiliary function for quantitatively transporting it.

【００１６】脱水装置５２は、混合貯留槽５１から定量
移送されてきた泥水（含水率９８〜９９％）を発酵分解
に適した含水率８５％前後以下に脱水処理することによ
り、発酵分解槽５３における発酵効率を向上させるため
の装置である。なお、脱水処理による離脱水は図２で示
すように前段のばっ気調整槽２に返送するようにした。
発酵分解槽５３は、いうまでもなく脱水調整した汚泥を
発酵分解させて堆肥土化させるためのものである。発酵
分解に際しては、発酵熱が生じるが、別途酸素を供給
し、効果的な有機物の分解が促進されるよう配慮してあ
る。The dewatering device 52 dehydrates muddy water (98-99% water content) quantitatively transferred from the mixing storage tank 51 to a water content of about 85% or less, which is suitable for fermentation decomposition. This is a device for improving the fermentation efficiency in. The dewatering by dewatering was returned to the aeration control tank 2 at the preceding stage as shown in FIG.
Needless to say, the fermentation decomposition tank 53 is for fermenting and decomposing sludge dewatered and adjusted to form compost. At the time of fermentation decomposition, fermentation heat is generated, but oxygen is separately supplied so that effective decomposition of organic substances is promoted.

【００１７】発酵分解に要する日数は文献により様々で
あるが、各種の理論＋実験データを参考し、この実施例
では１１日以上とし、好ましい堆肥土化が得られた。な
お、次の発酵調整槽５４であるが、これは概ね発酵分解
の終了した成分の微調整発酵を促し、良質な堆肥土を得
るためのものである。Although the number of days required for the fermentation decomposition varies depending on the literature, in this example, it was set to 11 days or more by referring to various theoretical and experimental data, and preferable composting was obtained. Incidentally, the next fermentation adjusting tank 54 is used for generally promoting fine adjustment fermentation of the components that have undergone fermentation and decomposition to obtain high-quality compost.

【発明の効果】【The invention's effect】

【００１８】本発明は以上説明したことから理解される
ように、被処理排水を主に浮遊性及び溶解性有機物を含
む汚水と同じく沈降性有機物を含む泥水に区分し、双方
が汚水処理系と泥水処理系において各々ばっ気分解処理
と発酵分解処理を受けることにより、浄水化と堆肥土化
が並立的かつ一体的にできるようにしたもので、例えば
従来の処理施設においてみられるような、コンポストな
いし建築資材等の再生に専用の別途施設の建設が不要と
なる。従って、農業集落排水の処理施設のようなもとも
と地域的一体感の強い中小規模の処理施設に最も適して
おり、しかも堆肥土化すれば多くの場合供給地が近接し
好都合である。さらに処理方法の特徴として、従来の活
性汚泥法による各種処理方式のように発生する余剰汚泥
等有機性汚泥の処理を別途汚泥処理として計画する必要
性を有さず、全量の有機性汚泥を泥水中含有物として同
一排水処理系内としての発酵分解処理設備に送り込むた
め、搬送等の手間が相対的に省力化される。要するに本
発明に係わる処理方法及び処理施設は、従来の処理方法
及び処理施設が被処理排水中の有機物の処理をばっ気分
解と沈殿分離とに求めているのとは異なり、被処理排水
中に含まれる全量有機物をばっ気分解と発酵分解により
一体的並立的に処理することを要件としており、従っ
て、被処理排水の浄水化と堆肥土化を経常的必然的目的
とすることが可能となり、従来法のごとく、沈降（沈
殿）区分（分離）した沈降性の有機物（汚泥）を別途汚
泥処理の対象として系外（ほとんどが排水処理施設場
外）へ排出する必要性を有していないため、きわめて完
結型であると同時に、この上なく環境保全型の排水処理
施設として効用を発揮することができる。As will be understood from the above description, the present invention classifies the wastewater to be treated mainly into sewage containing floating and soluble organic matter and muddy water containing sedimentable organic matter as well, and both of them are treated with a sewage treatment system. The muddy water treatment system undergoes aeration decomposition treatment and fermentation decomposition treatment, respectively, so that water purification and composting can be performed simultaneously and integrally.For example, compost as seen in conventional treatment facilities In addition, there is no need to construct a separate facility dedicated to the recycling of building materials. Therefore, it is most suitable for small and medium-sized treatment facilities that have a strong sense of unity in nature, such as treatment facilities for agricultural settlement drainage. In addition, if composting is used, the supply areas are often close and convenient. Another characteristic of the treatment method is that there is no need to separately plan the treatment of organic sludge such as excess sludge that occurs as in various treatment methods using the conventional activated sludge method, and the entire amount of organic sludge is treated as muddy water. Since the contents are sent to the fermentation decomposition treatment equipment in the same wastewater treatment system, labor such as transportation is relatively reduced. In short, the treatment method and the treatment facility according to the present invention are different from the conventional treatment methods and treatment facilities that require the treatment of organic substances in the treated wastewater by aeration and sedimentation separation. It is a requirement that all the organic substances contained be treated in an integrated and parallel manner by aerobic decomposition and fermentation decomposition.Therefore, it becomes possible to purify the wastewater to be treated and to make compost soil a routine and inevitable object. Unlike the conventional method, there is no need to discharge the sedimentable organic matter (sludge) that has settled (sedimented) (separated) separately from the system (mostly outside the wastewater treatment plant) as a target for sludge treatment. At the same time, it is extremely complete and can be used as an environmentally friendly wastewater treatment facility.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明の基本的な処理系統図を示す。FIG. 1 shows a basic processing system diagram of the present invention.

【図２】本発明方法を農業集落排水に適合した場合の処
理フローを示す。FIG. 2 shows a processing flow when the method of the present invention is adapted to agricultural settlement drainage.

【符号の説明】[Explanation of symbols]

１ ‥‥‥前処理装置 ２ ‥‥‥ばっ気調整槽 ３ ‥‥‥沈降区分槽 ４ ‥‥‥汚水処理系 ５ ‥‥‥泥水処理系 ４１‥‥‥ばっ気分解槽 ４２‥‥‥沈降分離槽 ４３‥‥‥滅菌槽 ４４‥‥‥ばっ気分解処理設備 ５１‥‥‥混合貯留槽 ５２‥‥‥脱水装置 ５３‥‥‥発酵分解槽 ５４‥‥‥発酵調整槽 ５５‥‥‥発酵分解処理設備 1 ‥‥‥ Pretreatment device 2 ‥‥‥ Aeration control tank 3 ‥‥‥ Sedimentation tank 4 ‥‥‥ Sewage treatment system 5 ‥‥‥ Mud water treatment system 41 ‥‥‥ Aeration decomposition tank 42 ‥‥‥ Sedimentation separation Tank 43 ‥‥‥ Sterilization tank 44 ‥‥‥ Aeration decomposition treatment equipment 51 ‥‥‥ Mixed storage tank 52 ‥‥‥ Dehydrator 53 ‥‥‥ Fermentation decomposition tank 54 ‥‥‥ Fermentation adjustment tank 55 ‥‥‥ Fermentation decomposition treatment Facility

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】 被処理排水を処理の初期の段階におい
て、主として浮遊性及び溶解性有機物を含む汚水と同じ
く沈降性有機物を含む泥水とに区分し、区分した汚水は
ばっ気分解処理したのち上澄水と残留沈降性有機物とに
分離し、区分した泥水はばっ気分解処理後の残留沈降性
有機物を含む分離泥水と共に脱水調整後、発酵分解処理
して堆肥土化し、被処理排水中に含まれる有機物の全量
を同一排水処理系内において一体的並立的かつ同次元的
に分解処理すること、を特徴とする排水処理方法。In the initial stage of treatment, the wastewater to be treated is mainly divided into sewage containing floating and soluble organic matter and muddy water containing sedimentable organic matter. Separated muddy water is separated into clear water and residual sedimentable organic matter, and the separated muddy water is subjected to dehydration adjustment together with separated muddy water containing residual sedimentable organic matter after aeration decomposition treatment, fermented and decomposed to compost, and contained in the wastewater to be treated A wastewater treatment method, wherein the whole amount of organic matter is decomposed in one and the same dimension in the same wastewater treatment system. 【請求項２】 被処理排水を浮遊性及び溶解性有機物を
含む汚水と沈降性有機物を含む泥水とに区分するため
の、沈降区分槽を設置し、この沈降区分槽にそれぞれ汚
水のばっ気分解槽と沈降分離槽からなるばっ気分解処理
設備と、泥水の脱水装置と発酵分解槽とからなる発酵分
解処理設備を接続したことを特徴とする、ばっ気・発酵
分解による排水処理施設。2. A sedimentation tank is provided for separating treated wastewater into sewage containing floating and soluble organic matter and muddy water containing sedimentable organic matter. A wastewater treatment facility for aeration and fermentation decomposition, characterized by connecting an aeration decomposition treatment facility consisting of a tank and a sedimentation separation tank, and a fermentation decomposition treatment facility consisting of a muddy water dewatering device and a fermentation decomposition tank.
JP2000324653A 2000-09-20 2000-09-20 Wastewater treatment method and wastewater treatment facility by aeration and fermentation decomposition Expired - Fee Related JP3562760B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2000324653A JP3562760B2 (en) 2000-09-20 2000-09-20 Wastewater treatment method and wastewater treatment facility by aeration and fermentation decomposition

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2000324653A JP3562760B2 (en) 2000-09-20 2000-09-20 Wastewater treatment method and wastewater treatment facility by aeration and fermentation decomposition

Publications (2)

Publication Number Publication Date
JP2002086180A true JP2002086180A (en) 2002-03-26
JP3562760B2 JP3562760B2 (en) 2004-09-08

Family

ID=18802151

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2000324653A Expired - Fee Related JP3562760B2 (en) 2000-09-20 2000-09-20 Wastewater treatment method and wastewater treatment facility by aeration and fermentation decomposition

Country Status (1)

Country Link
JP (1) JP3562760B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104230101A (en) * 2014-09-04 2014-12-24 浙江双灯家纺有限公司 Printing and dyeing wastewater sludge treatment and recycling method
CN114467396A (en) * 2022-02-10 2022-05-13 中国建筑土木建设有限公司 Rapid salt elimination equipment for improving muddy saline-alkali soil and rapid salt elimination method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104230101A (en) * 2014-09-04 2014-12-24 浙江双灯家纺有限公司 Printing and dyeing wastewater sludge treatment and recycling method
CN114467396A (en) * 2022-02-10 2022-05-13 中国建筑土木建设有限公司 Rapid salt elimination equipment for improving muddy saline-alkali soil and rapid salt elimination method thereof

Also Published As

Publication number Publication date
JP3562760B2 (en) 2004-09-08

Similar Documents

Publication Publication Date Title
Draaijer et al. Performance of the 5 MLD UASB reactor for sewage treatment at Kanpur, India
US6083386A (en) Method of treating animal waste
US5114587A (en) Method of sewage treatment
CN103073149B (en) Harmless processing method of night soil
FI70566C (en) TVAOSTEGS AKTIVSLAMFOERFARANDE FOER RENING AV AVLOPPSVATTEN
JPH09201599A (en) Method for recovering useful substance from organic waste and utilizing the same as resources
US20020066701A1 (en) Unified fermentation and thickening process
JPH07106360B2 (en) Method and equipment for cleaning wastewater, especially urban wastewater
EP1786735A2 (en) Waste activated sludge anaerobic contact waste stream treatment process-recycle
KR100229237B1 (en) Advanced treatment method and its device of night soil
KR100274534B1 (en) Nitrogen and phosphorus removal methods with using fermented organic wastes
CN107445403A (en) A kind of method for cooperateing with processing landfill percolate and burning electricity generation factory percolate
Amuda et al. Conversion of sewage sludge to biosolids
JP3562760B2 (en) Wastewater treatment method and wastewater treatment facility by aeration and fermentation decomposition
KR102340961B1 (en) Apparatus for treating waste water using iron oxide powder
US20050247622A1 (en) Anaerobic biological treatments
Ramzanipour et al. Overview of Municipal Wastewater and Sludge Treatment Process
JP3364018B2 (en) Wastewater treatment method
JP2003117597A (en) Biological treating method for excess sludge by utilizing hydrothermal reaction
US3300401A (en) Process for dewatering organic sludge which has been separated during treatment of waste water
JPS6157300A (en) Treatment of sludge of excretion purification tank
CA2221407A1 (en) Aerobic bioreactor for treating aqueous wastes at high organic and solids loadings
JP3369915B2 (en) Night soil treatment equipment
KR100254523B1 (en) Natural purification method and apparatus thereof
KR102299806B1 (en) Organic Waste Disposal Devices and Methods for Organic Waste Disposal Using them

Legal Events

Date Code Title Description
A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20040506

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20040507

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20040528

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20040528

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

LAPS Cancellation because of no payment of annual fees