JPS60110400A - Microbiological treatment of sludge due to wooden fine piece - Google Patents
Microbiological treatment of sludge due to wooden fine pieceInfo
- Publication number
- JPS60110400A JPS60110400A JP58218281A JP21828183A JPS60110400A JP S60110400 A JPS60110400 A JP S60110400A JP 58218281 A JP58218281 A JP 58218281A JP 21828183 A JP21828183 A JP 21828183A JP S60110400 A JPS60110400 A JP S60110400A
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- treatment
- medium layer
- wood chips
- treated
- 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
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
Landscapes
- Treatment Of Sludge (AREA)
- Fertilizers (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は汚泥の処理方法に係り、特に各種汚泥を微生物
活性によって処理する汚泥の微生物処理方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sludge treatment method, and more particularly to a sludge microbial treatment method for treating various types of sludge by microbial activity.
種々の環境から排出される汚泥の種類はその処理工程か
らみて発生源別にスクリーンかす、沈砂、最初沈澱池汚
泥、散水Ｆ床処理後の沈澱汚泥、活性汚泥処理後の余剰
汚泥、嫌気性消化汚泥、好気性消化汚泥等々に大別され
る。The types of sludge discharged from various environments are categorized by source based on the treatment process: screen sludge, sediment, primary settling tank sludge, settled sludge after sprinkler F bed treatment, surplus sludge after activated sludge treatment, and anaerobic digested sludge. , aerobic digestion sludge, etc.
これら各種汚泥の主な化学的組成、含有量および物理化
学的特性は次表１〜３０通りである。The main chemical compositions, contents, and physicochemical properties of these various sludges are shown in Tables 1 to 30 below.
表１：各種汚泥の化学的組成（乾燥固形物基準（鉤）表
２：各種汚泥の質と量
表３：各種汚泥の物理的化学的諸特性
このように各種汚泥は大量の有機物および水分を含んで
いるので、これをそのまま地上投棄することは腐敗、悪
臭の発生を生じて環境衛生上の観点からもとより許容さ
れず適切な汚泥処理が必要である。Table 1: Chemical composition of various sludges (dry solids basis) Table 2: Quality and quantity of various sludges Table 3: Physical and chemical characteristics of various sludges As shown above, various sludges contain large amounts of organic matter and moisture. Therefore, dumping the sludge on the ground as it is will cause decomposition and the generation of a foul odor, which is unacceptable from the viewpoint of environmental hygiene, and appropriate sludge treatment is required.
一般にこのような各種汚泥？投棄可能な形態に処理する
方法としては従来からの酸化−燃焼などの物理、化学的
な処理に加えて近年微生物の活性を利用した嫌気消化、
好気消化などの生物化学的処理方法が注目され、各分野
で開発実用化されている。しかしこれらの処理方法につ
いては関連する工程、すなわち濃縮や脱水などについて
その適用性の優劣や操作上の諸問題ならびに最終的な処
分までの経費等に多くの延点が残されている。In general, various types of sludge like this? In addition to conventional physical and chemical treatments such as oxidation and combustion, methods for processing into a form that can be disposed of include anaerobic digestion, which utilizes the activity of microorganisms, and
Biochemical processing methods such as aerobic digestion are attracting attention and are being developed and put into practical use in various fields. However, these treatment methods still have many drawbacks, such as the applicability of the processes involved, such as concentration and dehydration, various operational issues, and the costs involved in final disposal.
また、各種汚泥の最終的な処理方法は具体的には、（１
）地上処分、（２）水中処分（海洋処分）、（３）利用
処分に分けられ、（１） 、 （３）は内陸都市におい
て、また（１） 、 （２）は海岸都市において実施さ
れ、これらの処分に際して汚泥は固体または液体の形態
として輸送される。地上処分としては、たとえば消化汚
泥分水分含有のまま、あるψは天日乾燥または機械脱水
したもの？粉砕して畑地の土壌改良に利用する方法又は
乾燥物を空地に投棄するなどの方法がある。しかし、消
化汚泥の肥料価は低く、経済的でなく農家からも歓迎さ
れない。また、わが国では汚泥の排出される都市からの
経済的な輸送距離圏内にこのような投棄用地を見出すこ
とは容易でない。In addition, the final treatment method for each type of sludge is specifically (1)
) terrestrial disposal, (2) underwater disposal (marine disposal), and (3) utilization disposal. (1) and (3) are carried out in inland cities, and (1) and (2) are carried out in coastal cities. During these disposals, sludge is transported in solid or liquid form. For above-ground disposal, for example, digested sludge that still contains water may be dried in the sun or mechanically dehydrated? There are methods such as pulverizing it and using it for soil improvement in fields, or dumping the dried material in open space. However, the fertilizer value of digested sludge is low, making it uneconomical and not welcomed by farmers. Furthermore, in Japan, it is not easy to find such a dumping site within an economical transportation distance from the cities where sludge is being discharged.
−力水中処分では消化汚泥？液状のまま、または脱水し
て船で漢洋投棄するか、消化汚泥を海中にパイプ輸送し
て海水中に拡散する。しかし、船による処分方法は常時
汚泥の運搬のために少なからぬコストを必要とする。ま
たパイプ輸送投棄による海中拡散は適当な沿岸流のある
こと、水深が大で拡散上の水理条件を備えていること等
の地理的条件によって制約され、さらにスクリーンかす
、油などの浮遊性物質を予め除去すること、海底での汚
泥の沈積がないこと、外観的および実質的に海水を汚染
しないこと、漁業権にふれないこと等が必要であってそ
の実施が実際上ｖＡ難である。-Is digested sludge treated in water? The sludge is either dumped in a liquid form or dehydrated and dumped in Hanyang by ship, or the digested sludge is transported via pipes into the sea and dispersed into the seawater. However, the method of disposal by ship requires a considerable amount of cost to constantly transport the sludge. In addition, dispersion into the sea by pipe transport and dumping is limited by geographical conditions such as appropriate coastal currents, large water depths, and hydraulic conditions for dispersion. It is necessary to remove sludge in advance, to avoid the accumulation of sludge on the seabed, to not contaminate the seawater visually or substantially, and not to violate fishing rights, etc., and it is difficult to implement this in practice.
本発明者等はこのような汚泥処理における処理方法およ
び投棄方法にっ―ての従来技術の問題点を克服すべく研
究を重ねた結果、驚くべきことに所定粒度の微細な木質
細片中に各種の被処理汚泥分注入することのみからなる
簡単な処理によって汚泥が完全に分解、消化および濾過
され、しかもかかる木質細片を透過した後の水は８８．
ＢＯＤ等の規制基準の点で直接放流もしくは地中への滲
透を許容される程度にまで処理できることを発見した（
尚本明細書中において「木質細片」とは共形的には鋸屑
と称せられる微細な木粉および木片等を指すが、一般的
には鋸屑と同様に多孔性を有しかつ屑状に充填した状態
で適宜の空隙率を与えるような全ての木質細片を含むも
のとする）。The inventors of the present invention have conducted repeated research to overcome the problems of the conventional technology regarding treatment methods and dumping methods for sludge treatment, and have surprisingly found that fine wood particles of a predetermined particle size The sludge is completely decomposed, digested, and filtered through a simple process consisting of simply injecting various types of sludge to be treated, and the water after passing through the wood particles is 88.
It was discovered that it is possible to treat the water to the extent that direct discharge or seepage into the ground is acceptable in terms of regulatory standards such as BOD (
Note that in this specification, "wood chips" refer to fine wood powder and wood chips, etc., which are conformally called sawdust, but generally, like sawdust, they have porous properties and are in the form of scraps. shall contain all wood chips which, when filled, will provide suitable porosity).
さらに、本発明者等の引き続く実験および研究によれば
、かかる木質細片を微生物培養基を兼ねた処理媒質層と
して汚泥処理に用いることにより、層中に各種汚泥中の
脂肪質、タン白質、セルロース分等々に対応する順応菌
が発生、繁殖する結果、汚泥が比較的短時間で完全に分
解、消化され、処理槽中には処理残渣がほとんど認めら
れず木質細片を含む処理媒質層は保守および補給の必要
がなく半永久的に用すられるどとが判明した。Further, according to subsequent experiments and research by the present inventors, by using such wood chips as a treatment medium layer that also serves as a microbial culture medium in sludge treatment, the layer contains fats, proteins, cellulose, and other substances in various sludges. As a result of the generation and propagation of adapted bacteria corresponding to each minute, the sludge is completely decomposed and digested in a relatively short period of time, and almost no treatment residue is observed in the treatment tank, and the treatment medium layer containing wood particles is maintained. It was also found that there was no need for replenishment and that it could be used semi-permanently.
すなわち本発明によれば、被処理汚泥１重量部を粒度一
定の木質細片分含む処理媒質層１〜１０重量部に対して
注加し、かつ所定時間間隔で間歇的に前記処理媒質層に
通気を行ないながら周囲温度下で処理することを特徴と
する汚泥の微生物処理方法が提供される。That is, according to the present invention, 1 part by weight of the sludge to be treated is poured into 1 to 10 parts by weight of the treatment medium layer containing wood particles having a constant particle size, and the treatment medium layer is intermittently added at predetermined time intervals. A method for treating sludge with microorganisms is provided, which is characterized by treating sludge at ambient temperature while providing aeration.
尚汚泥の種類によっては砂等の重質で不溶性の無機物分
天・量に含有することが多いが、このような際には長時
間の使用中に砂が木質細片からなる処理媒質層に堆積し
て目詰りを生じさせその処理機能と低下させるおそれが
ある。Depending on the type of sludge, it often contains heavy, insoluble inorganic substances such as sand, but in such cases, during long-term use, the sand may form a treatment medium layer consisting of wood particles. There is a risk that it will accumulate and cause clogging, which may impair its processing performance.
このため、本発明の好ましい具体例においては、被処理
汚泥を予め水によって適宜な濃度に希釈する。これによ
って汚泥中の砂等が直ちに沈降するのでこれらと分離さ
れた上澄汚水分処理媒質層中に注入することによりすで
に述べたようにして汚泥分を効果的に処理することがで
きる。前記希釈濃度は汚泥水からの砂等の充分な分離お
よび処理水量の経済性などによって定められるが約１ｏ
ｏｏ ｐｐｍ以下とすれば実用上充分である。Therefore, in a preferred embodiment of the present invention, the sludge to be treated is diluted in advance with water to an appropriate concentration. As a result, sand and the like in the sludge immediately settles, and by injecting it into the supernatant sewage treatment medium layer separated from these, the sludge can be effectively treated as described above. The dilution concentration is determined by sufficient separation of sand etc. from the sludge water and economical efficiency of the amount of treated water, but it is approximately 1o.
A level of oo ppm or less is sufficient for practical use.
本発明の方法においては、汚泥の微生物工学的な処理に
用いられる木質細片の粒度、粒度分布および化学的成分
組成と特定の範囲内に維持することが極めて重要である
。特にその粒度についてはこれを平均細片径にして０．
２〜９．５ ｉｎ 。In the method of the present invention, it is extremely important to maintain the particle size, particle size distribution, and chemical composition of the wood chips used in the microbiological treatment of sludge within specific ranges. In particular, regarding the particle size, this is the average particle diameter of 0.
2-9.5 in.
好ましくは０．２〜３顛の範囲とすべきである。Preferably it should be in the range of 0.2 to 3 times.
細片径が０．２ Ｍ以下ではＰ材としての機能が低下し
て目詰り？生じ易くなり、一方５′ｍｍ以上では微生物
培養基質としての比表面積が小さくなり過ぎて充分な汚
泥処理能力を得ることができない。If the particle diameter is less than 0.2 M, the function as P material will deteriorate and cause clogging? On the other hand, if the thickness exceeds 5' mm, the specific surface area as a microbial culture substrate becomes too small, making it impossible to obtain sufficient sludge treatment ability.
さらに、かかる木質細片の化学的組成は原木の種類や固
体差によって多少変動するがおよそ次表の範囲のものが
好ましく、現在容易に入手できる種類のほとんどのもの
がかかる範囲の組成を満足する。Furthermore, the chemical composition of such wood chips varies somewhat depending on the type of wood and individual differences, but it is preferably within the range shown in the following table, and most of the types that are currently easily available satisfy this range of composition. .
表４
このような木質細片の供給源としては製材所から排出さ
れる鋸屑（通常は平均細片径０．１〜０．６１１ｍ）等
が一応対象となるが、かかる鋸屑と大量に得るために各
所の製材所から一括集収した鋸屑は必然的に種々の鋸屑
の混合物の形態となる。したがってその化学的組成は全
く不特定となり、また粒径につ−てもこれを篩分する必
要があるので著しく歩留りが低下する。また木材の国内
資源が減少しつつある現状では組成および粒度が一定し
た木質細片を限られた量の製材副産物としての鋸屑にめ
ることには自ら限度がある。Table 4 The source of such wood chips is sawdust discharged from sawmills (usually with an average diameter of 0.1 to 0.611 m). The sawdust collected in bulk from sawmills in various locations is inevitably in the form of a mixture of various sawdust. Therefore, its chemical composition is completely unspecified, and since it is necessary to sieve it for particle size, the yield is significantly reduced. In addition, in the current situation where domestic wood resources are decreasing, there is a limit to the amount of wood chips with a constant composition and particle size that can be included in the limited amount of sawdust as a lumber by-product.
このような観点から本発明者等は汚泥処理用の特定の木
質細片を得ることを目的とした装置を開発し原木から１
００％近い収率で木質細片のみを製造することに成功し
木質細片の安定した供給源を確保するに至っている。か
かる装置については本発明者等による昭和閏年１１月９
日付の特許願「木質細片製造装置」中に詳細に開示およ
び図示されている。From this point of view, the present inventors developed a device for the purpose of obtaining specific wood chips for sludge treatment.
We have succeeded in producing only wood chips with a yield of nearly 00%, and have secured a stable source of wood chips. Regarding such a device, the present inventor et al.
It is disclosed and illustrated in detail in the patent application ``Apparatus for producing wood strips'' dated 1996.
尚本発明の方法において用いる処理媒質層は前記木質細
片を含むことを必須の要件とするが、場合によってはそ
の一部をゼオライトあるいは多孔質セラミック等のよう
な周知の無機質吸着材ないしはｐ材又はその他同様なＦ
！Ａ能を有する多孔質料によって置き換えることもでき
る。このような場合の多孔質材と木質１１１１片との混
合比は通常１：４〜３：８の範囲とすることが好ましい
。It is essential that the treatment medium layer used in the method of the present invention contains the wood chips, but in some cases, a part of it may be made of well-known inorganic adsorbents or p-materials such as zeolite or porous ceramics. or other similar F
! It can also be replaced by a porous material having A capability. In such a case, the mixing ratio of the porous material and the wood 1111 pieces is usually preferably in the range of 1:4 to 3:8.
本発明の方法における汚泥処理温度は通常周囲温度と同
程度で良く、特に温度制御？必要としない。たとえば冬
期または寒冷地においてさえも周囲温度が約３°Ｃ以上
であれば、微生物の分解、醗酵反応によって生じる熱が
木質細片中に保持蓄積されるので常に充分な処理が可能
である。したがって、本発明の方法における「周囲温度
下で」という条件は処理ｔＪＬ質層中における微生物の
前記生化学的反応を何等積極的な温度制御と加えること
なく自然に進行させることと意味する。The sludge treatment temperature in the method of the present invention may normally be at the same level as the ambient temperature, and especially temperature control? do not need. For example, even in winter or in cold regions, if the ambient temperature is about 3° C. or higher, sufficient treatment is always possible because the heat generated by microbial decomposition and fermentation reactions is retained and accumulated in the wood chips. Therefore, the condition "at ambient temperature" in the method of the present invention means that the biochemical reaction of the microorganisms in the treated tJL layer is allowed to proceed naturally without any active temperature control.
尚本発明の方法においては前記木質細片を含む処理媒質
層の湿度と処理４５全体の平均として少なくとも６０％
以上に保持しておくことが望ましい。In the method of the present invention, the humidity of the treatment medium layer containing the wood chips and the average of the entire treatment 45 are at least 60%.
It is desirable to keep it above that level.
本発明の方法における汚泥処理のもっとも重要な特色の
一つは、汚泥の微生物活性による分解、消化、醗酵等の
生化学的な処理が、前記汚泥および／又は土中等の外部
環境から木質細片全台む処理媒質層（以下簡単のために
木質細片という）中に侵入して繁殖する微生物によって
行なわれる点にある。このような微生倹処理はもとより
通常の好気性および嫌気性菌による消化にもよるが、本
発明の場合これらの菌の夫々の至適繁殖条件の中間の条
件下で特に著しい汚泥消化の進行が認められる。かかる
中間期間において汚泥消化に顕著に寄与する微生物は現
在本発明等によって検索中であるが、本発明の方法にお
いては木質細片中に好気性菌および嫌気性菌の繁殖至適
条件ならびにその中間にあたる条件を経時的かつ逐次的
に反復して形成することにより極めて優れた汚泥処理効
果が得られる。One of the most important features of the sludge treatment in the method of the present invention is that biochemical treatments such as decomposition, digestion, and fermentation by microbial activity of the sludge remove wood particles from the external environment such as the sludge and/or soil. The process is carried out by microorganisms that invade and reproduce in the treatment medium layer (hereinafter referred to as wood chips for simplicity) that is contained throughout the machine. Such microbial thrift treatment is based on digestion by normal aerobic and anaerobic bacteria, but in the case of the present invention, sludge digestion progresses particularly markedly under conditions intermediate between the optimal breeding conditions for each of these bacteria. is recognized. The present invention is currently searching for microorganisms that significantly contribute to sludge digestion during such an intermediate period, but the method of the present invention requires optimal conditions for the growth of aerobic bacteria and anaerobic bacteria in wood chips, as well as intermediate conditions between them. An extremely excellent sludge treatment effect can be obtained by repeating the conditions corresponding to the following over time and sequentially.
このために、本発明においては汚泥の微生物処理に際し
て、木質細片中に空気を間歇的に送気することが重要で
ある〇
尚本発明の方法による汚泥処理にあっては、はとんど全
ての汚泥について微生物処理の進行と共に木質細片と含
む反応処理槽内のＩ）Ｈが酸性領域側に移行する傾向を
示したが、漁業水産廃棄物と主体とする汚泥の場合には
ｐＨが弱アルカリ性を示す場合がある。これはこの種汚
泥中に含まれるＮａｃｚのイオン解離によるものと考え
られる。For this reason, in the present invention, it is important to intermittently supply air into the wood particles during the microbial treatment of sludge. For all sludges, as the microbial treatment progressed, I)H in the reaction treatment tank containing wood particles tended to shift to the acidic region, but in the case of sludge mainly composed of fishery waste, the pH increased. May be slightly alkaline. This is considered to be due to ion dissociation of Nacz contained in this type of sludge.
以上説明したように、本発明の処理方法においては、処
理すべき汚泥を木質細片を含む処理媒質層中に注加し、
送気および送気の中断を所定時間間隔で反復しながら周
囲温度で処理と行なう極めて簡単な方法によって汚泥を
短時間で完全に分解、消化することができ、しかもこの
ようにして木質細片製造装置させることにより処理され
た汚水はそのＳＳ含有分、ＢＯＤ等が充分現行の法的規
制値頃下に減少されそのままで直接放流もしくは地中に
滲透させることが可能である。As explained above, in the treatment method of the present invention, sludge to be treated is poured into a treatment medium layer containing wood chips,
The sludge can be completely decomposed and digested in a short period of time by an extremely simple method of treatment at ambient temperature with repeated air supply and interruption of air supply at predetermined time intervals, and in this way it is possible to produce wood chips. The treated wastewater has SS content, BOD, etc. sufficiently reduced to below the current legal regulation values, and can be directly discharged as is or permeated into the ground.
このような優れた効果は、本発明の方法において用いら
れる処理媒質層の主成分としての木質細片が有機物の多
孔質構造からなることに起因している。すなわち、前記
木質細片はその比表面積が大きい点で従来の無機質のモ
レキュラシープに匹敵する機能と有するのみならず、特
に外部から木質細片中に入り込む汚泥消化細菌に対して
極めて好ましい繁殖環境と形成する。Such excellent effects are due to the fact that the wood chips, which are the main component of the treatment medium layer used in the method of the present invention, have a porous structure of organic material. In other words, the wood chips not only have a function comparable to conventional inorganic molecular sheep in terms of their large specific surface area, but also provide an extremely favorable breeding environment for sludge-digesting bacteria that enter the wood chips from the outside. to form.
すなわち木質細片はその多孔性によって微生物に対して
物理的および化学的に吸着表面積の大きな繁殖サイト？
与えると共に、有機培養基としてこれら細菌の汚泥成分
に対する分解、消化、醗酵等の生化学的反応に際して温
度、湿度、通気量さらにはｐｍ等の反応条件を好適に緩
衝保持するものと考えられる。かかる作用はたとえば自
然環境の土中における微生物の繁殖場所として周知ない
わゆる土壌有機腐植の機能にも相当するものであり、こ
れはゼオライト等の通常の多孔質吸着材には全く見られ
ない優れた効果である。In other words, wood chips provide a breeding site with a large surface area for physical and chemical adsorption of microorganisms due to their porosity?
At the same time, it is thought to serve as an organic culture medium to suitably buffer and maintain reaction conditions such as temperature, humidity, aeration rate, and even pm during biochemical reactions such as decomposition, digestion, and fermentation of sludge components by these bacteria. This effect corresponds to the function of so-called soil organic humus, which is well-known as a breeding ground for microorganisms in the soil of the natural environment, and this is an excellent function that is not found in ordinary porous adsorbents such as zeolite. It is an effect.
さらに本発明の方法においてはかかる木質細片による好
適な微生物繁殖環境を形成する一方、空気を間歇的に木
質細片中に送気することによって好気性および嫌気性菌
の繁殖に適した条件を交互に形成することによって汚泥
中等に存在するこれら菌類の消化活性と夫々充分に活用
することによって汚泥の効果的な消化が得られる。Furthermore, in the method of the present invention, while forming a suitable microbial breeding environment using the wood chips, conditions suitable for the growth of aerobic and anaerobic bacteria are created by intermittently blowing air into the wood chips. By alternately forming these fungi and making full use of the digestive activity of these fungi present in the sludge, effective digestion of the sludge can be achieved.
しかも本発明において注目すべき事実はこれら好気性お
よび嫌気性消化条件が逐次反復される中間の各期間にお
いて、従来知られている好気性および嫌気性菌による消
化に比較してはるかに迅速かつ完全な汚泥の分解、消化
が行なわれることである。これはかかる中間的な条件で
木質細片中に至適に繁殖する汚泥順応菌の活性によるも
のと思われ、その菌体については本発明者が現在調査中
である。その汚泥分解活性は極めて広汎な各種汚泥成分
にわたっており、処理後には通常開められるような菌体
残渣もほとんど残存せずまたゴム質さらには毛髪等のよ
うな成分まで数ケ月間程度の処理で実質的に分解される
事実が確認されている。Moreover, a noteworthy fact in the present invention is that during each intermediate period in which these aerobic and anaerobic digestion conditions are repeated, the digestion is much faster and more complete than in conventional aerobic and anaerobic digestion. This means that the sludge is decomposed and digested. This is thought to be due to the activity of sludge-adapted bacteria that optimally reproduce in wood chips under such intermediate conditions, and the present inventor is currently investigating the bacteria. Its sludge decomposition activity covers an extremely wide range of various sludge components, and almost no bacterial cell residue that would normally be left remains after treatment, and components such as rubber and even hair can be treated for several months. The fact that it is virtually decomposed has been confirmed.
したがって、本発明の方法による汚泥処理によれば、こ
のような完全な分解、消化によって処理後の廃水中の８
８．ＢＯＤ等が廃水処理基準を充分に満足させる程度に
低下されるので、廃水はそのまま放流もしくは地中滲透
させることができ処理槽およびその付帯設備を極めて簡
単な構造により容易に必要な場所に設置することができ
る。Therefore, according to the sludge treatment according to the method of the present invention, by such complete decomposition and digestion, 8
8. Since the BOD etc. are reduced to a level that fully satisfies wastewater treatment standards, the wastewater can be discharged as is or permeated into the ground, and the treatment tank and its ancillary equipment can be easily installed at the required location due to its extremely simple structure. be able to.
また前記のように本発明の方法による汚泥分解処理υ゛
完全進行するため、処理槽には何等の処理残渣も堆積せ
ず、かつ処理媒質としこの木質細片は長年にわたってほ
とんど消耗しないので、処理槽の設置後には実質的な保
守を必要とせずに半永久的に使用することができる。In addition, as mentioned above, since the sludge decomposition treatment υ゛ by the method of the present invention progresses completely, no treatment residue is deposited in the treatment tank, and the wood chips used as the treatment medium are hardly consumed over many years, so the treatment After the tank is installed, it can be used semi-permanently without requiring substantial maintenance.
さらに、本発明の方法は常温で行なわれかつ処理槽の撹
拌等分全く必要としないので前記空気の吹込み以外には
何等の操作を行なう必要がなく操作の労力およびコスト
と著しく低減させることができる。Furthermore, since the method of the present invention is carried out at room temperature and does not require any stirring of the processing tank, there is no need to perform any other operations other than the above-mentioned blowing of air, and the labor and cost of the operation can be significantly reduced. can.
以下本発明の方法を実施例に基いて詳細に説明する。The method of the present invention will be explained in detail below based on Examples.
実施例１
散水渥床汚泥１ ｋｇを粒径約０，５〜ｌｉｉの木質細
片５壁に均一に混合して水分を５０〜７５％に調整した
。かかる混合物を含む処理槽に対して空気を９０ ｔ
７時の流量で８時間送気し次いで１６時間送気全中断す
る操作を反復して行ない、常温で汚泥の微生物処理を行
なった。４ｇ崎囚／′ｌハエ［゛、汚泥は全て極めて迅
速に消化されかつ処理槽内の木質細片層中にはほとんど
弘返残渣が認められなかった。処理槽からの排出液のｐ
Ｈは６．５であり、ＢＯＤ値は約７であった。Example 1 1 kg of sprinkling bed sludge was uniformly mixed with 5 walls of wood strips having a particle size of about 0.5 to lii to adjust the moisture content to 50 to 75%. 90 t of air was pumped into the treatment tank containing the mixture.
The operation of supplying air at a flow rate of 7:00 for 8 hours and then completely discontinuing the supply of air for 16 hours was repeated to perform microbial treatment of the sludge at room temperature. All the sludge was digested very quickly, and almost no filtration residue was observed in the woody debris layer in the treatment tank. p of the liquid discharged from the treatment tank
H was 6.5 and BOD value was approximately 7.
実施例２
不溶性無機物の含有分の高い嫌気性消化汚泥を前記実施
例１と同様な手順で処理すると処理槽に短期間で目詰り
を生じた。Example 2 When anaerobic digested sludge with a high content of insoluble inorganic substances was treated in the same manner as in Example 1, the treatment tank became clogged in a short period of time.
本例ではかかる汚泥に予め水を加えてｉｏｏｏｐｐｍの
濃度に希釈しまず汚泥中に含有された砂等の不溶性無機
物を沈降させた。次いで分離された汚泥液１ ｍ’ ｋ
粒径約０．５〜１ｎの木質細片５ｋｙを装填した処理槽
に対してその上部から１００ｔ／時の流量で注加した。In this example, water was added to the sludge in advance to dilute it to a concentration of ioooppm, and insoluble inorganic substances such as sand contained in the sludge were allowed to settle. Then the separated sludge liquid 1 m'k
The mixture was poured into a treatment tank loaded with 5 ky of wood chips having a particle size of about 0.5 to 1 nm from the top at a flow rate of 100 t/hour.
これと同時に処理槽の下部から空気Ｔｈ６（１／時の流
量で８時間送気し次いで１６時間送気を中断する操作を
反復し常温で微生物処理を行なった。At the same time, microbial treatment was carried out at room temperature by repeating an operation in which air was supplied from the lower part of the treatment tank at a flow rate of Th6 (1/hour) for 8 hours, and then the supply of air was interrupted for 16 hours.
汚泥は全て極めて迅速に消化されかつ処理槽内の木質細
片層中にはほとんど処理残渣が認められなかった。処理
槽からの排出液のｐＨは６．０であり、ＢＯＤ値は約８
であった。All the sludge was digested very quickly and almost no treatment residue was found in the wood debris layer in the treatment tank. The pH of the liquid discharged from the treatment tank is 6.0, and the BOD value is approximately 8.
Met.
実施例３
活性汚泥０．７ｋｌに水を加えて汚泥分濃度７００ ｐ
ｐｍの懸濁液を調整し、充分に攪拌して不溶性の無機物
を沈降分離させた。Example 3 Add water to activated sludge 0.7kl to make sludge concentration 700p
A suspension of pm was prepared and thoroughly stirred to separate insoluble inorganic substances by sedimentation.
粒径０．２〜５１１ｍの木質細片８トンおよび粒径０．
３〜１０簡の多孔質セラミック３トン分充分均−に混合
した処理媒質混合物と処理槽に充填した。8 tons of wood chips with a particle size of 0.2 to 511 m and a particle size of 0.
A treatment tank was filled with a sufficiently uniformly mixed treatment medium mixture equivalent to 3 tons of porous ceramic of 3 to 10 pieces.
処ｆＢ！、槽の上部から前記分離後の懸濁液を１２０１
Ａの流量で注入すると共に処理槽の下部から空気を９０
１７時の流量で８時間送気しその後１６時間送気を中断
する操作全圧後し常温で微生物処理を行なった。Treatment fB! , the suspension after separation from the upper part of the tank 1201
At the same time as injecting air at a flow rate of A, air is pumped in from the bottom of the treatment tank at a rate of 90
Air was supplied at a flow rate of 17:00 for 8 hours, and then air supply was stopped for 16 hours.
汚泥分は全て極めて迅速に消化されかつ処理槽内の処理
媒質混合物中には＃理残渣はほとんど認められなかった
。処理槽からの排出液のｐＨは６．２であり、ＥＯＤ値
は１７に減少された。All of the sludge content was digested very quickly and almost no residue was found in the treatment medium mixture in the treatment tank. The pH of the effluent from the treatment tank was 6.2 and the EOD value was reduced to 17.
実施例４
インホフ槽消化汚泥Ｑ、７ｋｙに水を加えて汚泥分濃度
７００ ｐｐｍの懸濁液を調製し、充分に攪拌して不溶
性の無機物を沈降分離させた。Example 4 Water was added to Inhof tank digested sludge Q, 7ky to prepare a suspension having a sludge concentration of 700 ppm, and the suspension was sufficiently stirred to separate insoluble inorganic substances by sedimentation.
粒径０．２〜５ｇＱの木質細片８トン、粒径０．３〜１
０」屡の膠質上１トンおよび粒径０．２〜４ｍ７１のゼ
オライト１トンと充分均一に混合した処理媒質混合物２
゛処理槽に充填した。処理槽の上部から前記分離後の懸
濁液をまた下部から空気を前記実施例３と同様にして夫
々注入および送気して常温で微生物処理を行なった。汚
泥分は全て極めて迅速に消化されかつ処理槽内の処理媒
質混合物中には幻五ヱ残渣はほとんど認められなかった
。8 tons of wood chips with a particle size of 0.2 to 5 gQ, a particle size of 0.3 to 1
Processing medium mixture 2 sufficiently uniformly mixed with 1 ton of colloid and 1 ton of zeolite with a particle size of 0.2 to 4 m71
゛The treatment tank was filled. Microbial treatment was carried out at room temperature by injecting and supplying the separated suspension from the upper part of the treatment tank and air from the lower part in the same manner as in Example 3. All of the sludge was digested very quickly, and almost no Gengoe residue was found in the treatment medium mixture in the treatment tank.
処理槽からの排出液のｐＨは６．２でありＥＯＤは約１
２に減少された。The pH of the liquid discharged from the treatment tank is 6.2, and the EOD is approximately 1.
It was reduced to 2.
尚前記実施例３および４で木質細片に対して増散剤とし
て混合した多孔質セラミック、膠質上（鹿沼土）および
ゼオライトの化学組成は次表の通りである。The chemical compositions of the porous ceramic, colloid (Kanuma clay) and zeolite mixed as a dispersing agent with the wood chips in Examples 3 and 4 are as shown in the following table.
表５
前記各実施例における廃水中の各成分の測定法はいずれ
も関連するＪＩＳ規格によるものであるＯ
前記各実施例１〜４に加えて下水腐敗槽汚泥、浄化槽汚
泥、終沈汚泥、コミユニティプラント最終汚泥、汲取り
し尿汚泥、ｌ−尿消化汚泥、し尿消化終沈汚泥、生活廃
水汚泥、食品工場廃水汚泥、および動物し尿汚泥につφ
てこれら実施例と同様な方法で処理を施した場合にも処
理後の廃水は全て廃水処理の基準を満足するものであっ
た。Table 5 The methods for measuring each component in wastewater in each of the above Examples are based on the relevant JIS standards. Unity plant final sludge, pumped human waste sludge, l-urine digested sludge, human waste digested final sludge, domestic wastewater sludge, food factory wastewater sludge, and animal human waste sludge
Even when the treatment was carried out in the same manner as in these Examples, all of the treated wastewater satisfied the standards for wastewater treatment.
Claims (4)
処理媒質層１〜ｌＯ重量部に対して注加し、かつ所定時
間間隔で間歇的に前記処理媒質層に通気を行ないながら
周囲温度で処理することを特徴とする汚泥の微生物処理
方法。(1) Pour 1 to 10 parts by weight of a treatment medium layer containing 1 part by weight of sludge and wood chips with a constant particle size, and while aerating the treatment medium layer intermittently at predetermined time intervals. A method for microbial treatment of sludge, characterized by treatment at ambient temperature.
希釈し、希釈された汚水から不溶性の無機物を沈降除去
し、次いで分離された上澄汚水を前記木質細片を含む処
理媒質層中に注加して処理することを特徴とする特許 載の汚泥の微生物処理方法。(2) Dilute the sludge to be treated with water to about ioooppm or less, remove insoluble inorganic substances by sedimentation from the diluted sewage, and then pour the separated supernatant sewage into the treatment medium layer containing the wood chips. A patented method for microbial treatment of sludge.
５Ｕの範囲内にあることを特徴とする前記特許請求の範
囲外１項記載の汚泥の微生物処理方法。(3) The particle size of the wood chips in the treatment medium layer is Q, 2im ~
The method for microbial treatment of sludge according to claim 1, characterized in that the amount of sludge is within the range of 5U.
無機物をさらに含むことを特徴とする前記特許請求の範
囲外１項記載の汚泥の微生物処理方法。(4) The method for microbial treatment of sludge according to claim 1, wherein the treatment medium layer further contains a porous inorganic material in addition to the wood chips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58218281A JPS60110400A (en) | 1983-11-20 | 1983-11-20 | Microbiological treatment of sludge due to wooden fine piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58218281A JPS60110400A (en) | 1983-11-20 | 1983-11-20 | Microbiological treatment of sludge due to wooden fine piece |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60110400A true JPS60110400A (en) | 1985-06-15 |
| JPH0234679B2 JPH0234679B2 (en) | 1990-08-06 |
Family
ID=16717389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58218281A Granted JPS60110400A (en) | 1983-11-20 | 1983-11-20 | Microbiological treatment of sludge due to wooden fine piece |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60110400A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006305531A (en) * | 2005-03-29 | 2006-11-09 | Sanwa Seisakusho:Kk | Method and apparatus for treating organic waste |
| JP4547394B2 (en) * | 2007-03-05 | 2010-09-22 | 県南環境保全センター株式会社 | Waste water purification treatment method and waste water purification treatment apparatus |
| CN102515901B (en) * | 2011-12-02 | 2013-12-04 | 南京市环境保护科学研究院 | Method for utilizing sludge from municipal sewage treatment plant as forestry soil matrix |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5358375A (en) * | 1976-11-09 | 1978-05-26 | Taiyo Kogyo Co Ltd | Process for disposing manure |
| JPS5369169A (en) * | 1976-11-25 | 1978-06-20 | Ngk Insulators Ltd | Method for fermentative treatment of organic wastes |
| JPS5648469A (en) * | 1979-09-27 | 1981-05-01 | Okabe Kk | Mobile form construction |
| JPS5670896A (en) * | 1979-11-15 | 1981-06-13 | Takara Kako Sangyo Kk | Treatment of organic waste material by using shell fossil remains |
| JPS5874186A (en) * | 1981-10-29 | 1983-05-04 | Kureha Chem Ind Co Ltd | Biological treating agent for sewage |
-
1983
- 1983-11-20 JP JP58218281A patent/JPS60110400A/en active Granted
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5358375A (en) * | 1976-11-09 | 1978-05-26 | Taiyo Kogyo Co Ltd | Process for disposing manure |
| JPS5369169A (en) * | 1976-11-25 | 1978-06-20 | Ngk Insulators Ltd | Method for fermentative treatment of organic wastes |
| JPS5648469A (en) * | 1979-09-27 | 1981-05-01 | Okabe Kk | Mobile form construction |
| JPS5670896A (en) * | 1979-11-15 | 1981-06-13 | Takara Kako Sangyo Kk | Treatment of organic waste material by using shell fossil remains |
| JPS5874186A (en) * | 1981-10-29 | 1983-05-04 | Kureha Chem Ind Co Ltd | Biological treating agent for sewage |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0234679B2 (en) | 1990-08-06 |
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