JP2002018460A - Method and apparatus for treating wastewater containing oil - Google Patents
Method and apparatus for treating wastewater containing oilInfo
- Publication number
- JP2002018460A JP2002018460A JP2000210622A JP2000210622A JP2002018460A JP 2002018460 A JP2002018460 A JP 2002018460A JP 2000210622 A JP2000210622 A JP 2000210622A JP 2000210622 A JP2000210622 A JP 2000210622A JP 2002018460 A JP2002018460 A JP 2002018460A
- Authority
- JP
- Japan
- Prior art keywords
- biological filter
- wastewater
- oil
- grease trap
- filter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Biological Treatment Of Waste Water (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、レストラン、ホ
テルなどの厨房廃水、給食センター、弁当加工場、食品
加工場などの廃水に含まれる油脂分を低減する方法及び
装置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 and an apparatus for reducing fats and oils contained in kitchen wastewater from restaurants, hotels and the like, foodservice centers, lunch boxes and food processing plants.
【０００２】[0002]
【従来の技術】油脂分を含む廃水の一般的な処理は、廃
水の経路にスクリーンフィルターを設置して油脂分を回
収する方法が採られているが、スクリーンフィルターに
付着した油脂分を除去するのに多大な労力と大量の洗浄
水を要している。2. Description of the Related Art In general treatment of wastewater containing fats and oils, a method of collecting a fats and oils by installing a screen filter in a path of the wastewater is employed, but the fats and oils attached to the screen filter are removed. It requires a great deal of labor and a large amount of washing water.
【０００３】この種のトラブルを解消する手段として、
培養した微生物を廃水に接触させる方法が提案されてい
る。（例えば特開平７−５１０４８号、同８−１８２９
９５号、同９−１３７４９９号公報） しかしながら、油脂分を含む廃水は特定の時間帯に集中
することが多く、一般的に使用されているグリストラッ
プ装置においては、廃水量が多い場合に油脂分が微生物
によって消化されない状態で素通りし、またグリストラ
ップ装置に粘着状態で蓄積したオイルスカムを取り除く
ことは至難である。[0003] As a means of solving this kind of trouble,
A method of contacting cultured microorganisms with wastewater has been proposed. (For example, JP-A-7-51048 and 8-18129
However, wastewater containing fats and oils often concentrates in a specific time zone, and in a grease trap device generally used, when the amount of wastewater is large, the fats and oils are reduced. It is extremely difficult to remove oil scum that has passed through in a state that is not digested by microorganisms and that has adhered to the grease trap device.
【０００４】特開平８−６６６９１号公報には、グリス
分解装置を既にオイルスカムが発生している部分あるい
はオイルスカムが蓄積するトラップの上層部に浮上さ
せ、グリス分解装置に流入する分離されたグリスを、微
生物を含浸させた天然軽量骨材に接触させ、エアレーシ
ョンを行いながら分解させる装置が開示されている。し
かしながら、この装置によればグリストラップ内に導か
れ、第１室を経由して浮上するオイルスカムのうち、主
としてエアレーションによる自然の動きによってグリス
分解装置内に導かれるオイルスカムのみが微生物分解さ
れるものであって、油脂分の分解に関しては必ずしも満
足しうる状態にあるとは言えない。[0004] Japanese Patent Application Laid-Open No. 8-66691 discloses a grease decomposition apparatus in which a grease decomposing device is floated on a portion where oil scum has already been generated or on an upper layer of a trap where oil scum is accumulated, and separated grease flowing into the grease decomposition device. Is contacted with a natural lightweight aggregate impregnated with microorganisms to decompose while performing aeration. However, according to this device, of the oil scum guided into the grease trap and floating via the first chamber, only the oil scum guided into the grease decomposition device by natural movement mainly due to aeration is microbial degraded. Therefore, it cannot be said that the decomposition of fats and oils is always in a satisfactory state.
【０００５】[0005]
【発明が解決しようとする課題】この発明はレストラ
ン、ホテルなどの厨房廃水、給食センター、弁当加工
場、食品加工場などの廃水に含まれる油脂分の除去効率
を飛躍的を高め、且つ既存のグリストラップ装置に容易
に適応しうる新規なシステムを提供しようとするもので
ある。SUMMARY OF THE INVENTION The present invention dramatically improves the efficiency of removing fats and oils contained in wastewater from kitchen wastewater in restaurants, hotels, etc., food service centers, bento processing plants, food processing plants, and the like. It is an object of the present invention to provide a new system that can be easily adapted to a grease trap device.
【０００６】[0006]
【課題を解決するための手段】このような事情に鑑み本
発明者らは数多くの試験を重ねた結果、グリストラップ
装置の上部位置に、表層部に微生物を担持させた複数個
の微生物担持体を充填した生物フィルターを設け、前記
生物フィルター内を好気性雰囲気に維持し、含油廃水を
生物フィルター内に供給し、生物膜濾過された処理水を
生物フィルターから放出させることによって、所期の目
的を達成しうることを認め本発明を完成するに至った。In view of such circumstances, the present inventors have conducted a number of tests, and as a result, have found that a plurality of microorganism carriers having microorganisms supported on the surface layer are located at the upper position of the grease trap device. By providing a biological filter filled with, maintaining the inside of the biological filter in an aerobic atmosphere, supplying oil-containing wastewater into the biological filter, and discharging the treated water subjected to biofilm filtration from the biological filter, That the present invention can be achieved, and completed the present invention.
【０００７】本発明方法を実施するに当たっては、表層
部に微生物を担持させた複数個の微生物担持体を充填し
た生物フィルターを、グリストラップ装置の上部位置に
配設し、含油廃水を前記生物フィルター内に導入する廃
水供給管を施し、生物フィルター内を曝気させるエアー
レイションパイプを設け、生物フィルターを通過した排
水を系外に放出させる排水管を施した装置が好適であ
る。[0007] In carrying out the method of the present invention, a biological filter filled with a plurality of microorganism carriers having microorganisms supported on a surface layer is disposed at an upper position of a grease trap device, and the oil-containing wastewater is subjected to the biological filter. It is preferable to use a device provided with a wastewater supply pipe introduced into the inside, an aeration pipe for aerating the inside of the biological filter, and a drainage pipe for discharging wastewater passing through the biological filter to the outside of the system.
【０００８】またスクリーンフィルターによって油水化
したスカムを除去する装置を備えている場合は、グリス
トラップ装置の上部位置に表層部に微生物を担持させた
微生物担持体を充填した生物フィルターを設け、スクリ
ーンフィルターによってスカムを除去した含油廃水を生
物フィター内に導く揚水装置を施し、生物フィルター内
を曝気させるエアーレイションパイプを設けて、生物フ
ィルターを通過した排水を系外に放出させることによっ
て、所期の目的を達成することができる。When a device for removing oily scum by a screen filter is provided, a biological filter filled with a microorganism carrier having microorganisms supported on a surface layer is provided at an upper position of the grease trap device. A pumping device that guides the oil-containing wastewater from which scum has been removed into the biological filter is installed, and an aeration pipe is installed to aerate the biological filter, and the wastewater that has passed through the biological filter is released out of the system. Can be achieved.
【０００９】本発明の基本的構成は、グリストラップ装
置の上部位置に、微生物を担持させた複数個の微生物担
持体を充填した生物フィルターを設け、油脂分を含有す
る廃水の多くの部分を生物フィルター内に供給し、流入
する油脂分を生物フィルター内に停留させ、油脂分と微
生物担持体に展着した微生物の接触時間を長らえること
により、油脂の微生物による分解を促進することを意図
したものである。The basic constitution of the present invention is that a biological filter filled with a plurality of microorganism carriers carrying microorganisms is provided at the upper position of the grease trap device, and a large part of wastewater containing oils and fats is biologically filtered. It was intended to promote the decomposition of fats and oils by microorganisms by supplying them into the filter and retaining the inflowing fats and oils in the biological filter and prolonging the contact time between the fats and oils and the microorganisms spread on the microorganism carrier. Things.
【００１０】[0010]
【発明の実施の形態】図面は本発明方法の実施に適する
装置を示したものであり、図１はグリストラップ装置１
の上部位置にステンレス製の生物フィルター３を懸架
し、その開口部に廃水供給管２を導き、図３に示したよ
うに生物フィルター３には、表層部に微生物を担持させ
た複数個の微生物担持体４を充填し、水没する位置に多
数の小孔を穿設したエアレーションパイプ６を配置し
て、エアポンプ５から塩化ビニール管等を介して供給さ
れる圧縮空気を生物フィルター内でバブリングさせ、生
物フィルター内の雰囲気を好気性に維持している。微生
物担持体４は無機系の濾材からなるものが好適であり、
これらは静止状態において少なくともエアレーションパ
イプ６より高い位置に留まる量を添加すべきである。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an apparatus suitable for carrying out the method of the present invention, and FIG.
The biological filter 3 made of stainless steel is suspended at the upper position of the, and the wastewater supply pipe 2 is led to the opening of the biological filter 3. As shown in FIG. An aeration pipe 6 having a large number of small holes is arranged at a position where the carrier 4 is filled and submerged, and compressed air supplied from the air pump 5 via a vinyl chloride pipe or the like is bubbled in the biological filter. The atmosphere inside the biological filter is kept aerobic. The microorganism carrier 4 is preferably made of an inorganic filter medium.
These should be added in such an amount that they remain at least higher than the aeration pipe 6 in the stationary state.
【００１１】図中７は微生物剤供給装置であり、市販さ
れている液状酵素剤入り微生物製剤の水溶液を収納し、
定量ポンプを介してこれを生物フィルター内に供給し
て、微生物担持体中に存在する菌類の活性化を図ってい
る。なお生物フィルター３の隔壁には、径３〜５ｍｍの
多数の透孔８が形成されており、生物フィルターによっ
て浄化された廃水は、透孔８を経由して排水管９に至り
放流される。図中１０は水流を規制する堰板を表わす。In the figure, reference numeral 7 denotes a microbial agent supply device which stores a commercially available aqueous solution of a microbial preparation containing a liquid enzyme agent.
This is supplied into the biological filter via a metering pump to activate the fungi present in the microorganism carrier. A large number of through holes 8 having a diameter of 3 to 5 mm are formed in the partition wall of the biological filter 3, and the wastewater purified by the biological filter is discharged to the drain pipe 9 via the through holes 8. In the figure, reference numeral 10 denotes a weir plate that regulates a water flow.
【００１２】図２に示した含油廃水処理装置は、スクリ
ーンフィルター１１によって油水化したスカムを除去す
る装置を備えており、廃水供給管から廃水を直接生物フ
ィルターに供給できないので、スクリーンフィルターを
通過させてスカムを除去した含油廃水を揚水装置１２に
よって生物フィルター３に供給し、含油廃水を好気性の
雰囲気に維持された生物フィルター内において、表層部
に微生物を担持させた複数個の微生物担持体４と接触さ
せて生物膜濾過を行ない、生物フィルターを通過した排
水を系外に放出させたものである。揚水装置としては、
含油廃水をエアーポンプ１６から供給する空気と同伴さ
せるものが適している。またこの方法の実施に当たって
は、グリストラップ装置１に含油廃水の貯水室１３と生
物フィルター３を施した廃水処理室１４を隔壁１５によ
って分離させることが望ましい。The oil-containing wastewater treatment apparatus shown in FIG. 2 is provided with a device for removing scum converted to oily water by the screen filter 11. Since wastewater cannot be directly supplied to the biological filter from the wastewater supply pipe, the wastewater is passed through the screen filter. The oil-containing wastewater from which the scum has been removed is supplied to the biological filter 3 by the water pumping device 12, and in the biological filter in which the oil-containing wastewater is maintained in the aerobic atmosphere, a plurality of microorganism carriers 4 having microorganisms supported on the surface layer are provided. , And biofilm filtration is performed, and the wastewater that has passed through the biological filter is discharged outside the system. As a pumping device,
It is suitable that the oil-containing wastewater is accompanied by air supplied from the air pump 16. In carrying out this method, it is desirable to separate the oil-containing wastewater storage chamber 13 and the wastewater treatment chamber 14 provided with the biological filter 3 in the grease trap device 1 by a partition wall 15.
【００１３】図中４は微生物担持体であり、代表的なも
のとしては無機系の濾材に微生物を被着させたものであ
る。これらは静止状態において少なくとも逆洗パイプ５
より高い位置に留まる量を添加すべきである。生物フィ
ルター３の外側位置には揚水装置（エアーリフト）９が
設けられ、前記エアーポンプ１６から供給される圧搾空
気によって、貯水室１３内の含油廃水が生物フィルター
３の上方に送られ散水される。本発明の実施に当たっ
て、通常のグリストラップ装置１における槽の容積と生
物フィルター３の容積比は、１０００：３００〜４００
の範囲が理想的である。油水分離槽のような容積の大き
い施設に設置する場合、生物フィルターの大きさは、微
生物担持体に掛かるｎ−ヘキサン抽出量の負荷が、一日
当たり５〜１０ｋｇ／ｍ３になるよう決定すべきである
が、これにより求められた生物フィルターが非現実的な
大きさになる場合には、本発明方法は必ずしも有効なも
のと認められない。In the figure, reference numeral 4 denotes a microorganism carrier, which is typically formed by adhering microorganisms to an inorganic filter medium. These are at least the backwash pipe 5 at rest.
An amount that stays higher should be added. A water pump (air lift) 9 is provided at a position outside the biological filter 3, and the oil-containing wastewater in the water storage chamber 13 is sent above the biological filter 3 and sprinkled by compressed air supplied from the air pump 16. . In carrying out the present invention, the volume ratio of the tank to the biological filter 3 in the ordinary grease trap device 1 is 1000: 300 to 400.
Range is ideal. When installed in a large facility volume, such as oil-water separation tank, the size of the biological filter is applied to the microbial support n- hexane extraction of the load, to be determined to be the daily 5 to 10 kg / m 3 However, the method of the present invention is not always considered to be effective if the biological filter obtained by this method has an unrealistic size.
【００１４】グリストラップ装置の大きさは、廃水の処
理量によって定められるので、格別に油脂分が高くない
限り、通常使用されているすべてのグリストラップ装置
に本発明方法を適用することができる。また生物フィル
ターの形状は、グリストラップの形状によって特に限定
を受けることはない。生物フィルター３に微生物担持体
４を設置した初期の段階では、未だその表面に微生物の
膜が形成されていないので、早期のうちにその表面に微
生物膜を成長させる必要があることから、微生物担持体
としては無機系の多孔質構造からなるものが望ましい。Since the size of the grease wrapping apparatus is determined by the amount of wastewater to be treated, the method of the present invention can be applied to all normally used grease wrapping apparatuses unless the oil content is particularly high. Further, the shape of the biological filter is not particularly limited by the shape of the grease trap. At the initial stage of the installation of the microorganism carrier 4 on the biological filter 3, no microbial film has yet been formed on the surface, and it is necessary to grow the microorganism film on the surface at an early stage. It is desirable that the body has an inorganic porous structure.
【００１５】本発明の実施に適する代表的な微生物担持
体としては、活性炭、レンガ粗粒品、ゼオライトなどの
天然鉱物、セラミック、ポリエチレンなどの石油精製品
を発泡造粒加工したものが挙げられ、これらは単独もし
くは組み合わせて使用することが出来る。微生物担持体
の粒度は使用時に嫌気性雰囲気になることを避けるた
め、担持体相互の間に適度な間隙を設ける必要があり、
粒度の異なるものを適宜に混ぜ合わせて使用すべきであ
る。この種の微生物担持体として通常は、粒径３ｍｍ〜
１０ｍmの範囲にあるものを組み合わせて使用すればよ
い。担持体の粒径がこれより小さい場合には目詰まりを
生じて濾過が円滑に行なえず、また担持体が大きくなり
過ぎると空隙が多くなって、油脂類の濾取を充分に行う
ことが出来ない。微生物担持体の内部に蓄積した油分も
微生物によって分解を促進させる必要があるため、エア
レーションを行なって常に微生物担持体の内部を好気性
の環境に維持する必要がある。Typical microorganism carriers suitable for the practice of the present invention include activated carbon, coarse-grained bricks, natural minerals such as zeolite, ceramics, and refined petroleum products such as polyethylene. These can be used alone or in combination. The particle size of the microorganism carrier must be provided with an appropriate gap between the carriers to avoid becoming an anaerobic atmosphere during use.
Those having different particle sizes should be appropriately mixed and used. This type of microorganism carrier usually has a particle size of 3 mm to
What is necessary is just to combine and use what is in the range of 10 mm. If the particle size of the carrier is smaller than this, clogging occurs and filtration cannot be carried out smoothly.If the carrier is too large, voids increase, and sufficient filtration of fats and oils can be performed. Absent. Since it is necessary to promote the decomposition of the oil accumulated inside the microorganism carrier by the microorganisms, it is necessary to always maintain the inside of the microorganism carrier in an aerobic environment by performing aeration.
【００１６】生物フィルター内における油脂分の蓄積分
布を調べると、表層部から下層部に至るに連れて減少し
ており、特に表層部からその１０％位の内部位置に極端
に蓄積されている。従って、生物フィルター内のエアレ
ーションの位置は微生物担持体の中間層に設置すべきで
ある。本発明の実施に適するエアレーションパイプは、
塩化ビニルなどの合成樹脂管、ステンレス鋼管等に適宜
に孔を開けたものを用い、これを生物フィルター内で静
止させた状態に設置し、エアレーションパイプとエアー
ポンプをホースによって連結したもので差し支えない。
本発明におけるエアレーション操作は、油分の蓄積度合
いあるいは分解度合いに応じて連続もしくは間欠のいず
れかを選ぶことができる。When the accumulation distribution of fats and oils in the biological filter is examined, it decreases from the surface layer to the lower layer, and particularly, it is extremely accumulated at about 10% of the internal position from the surface layer. Therefore, the location of the aeration in the biological filter should be located in the middle layer of the microorganism carrier. Aeration pipes suitable for the practice of the invention are:
Use a synthetic resin tube such as vinyl chloride, stainless steel tube, etc. with perforated holes, place it in a biological filter stationary, and connect the aeration pipe and air pump with a hose. .
In the aeration operation in the present invention, either continuous or intermittent can be selected according to the degree of accumulation or decomposition of oil.
【００１７】廃水中の油脂分には、乳化した状態のもの
と遊離状になったものがあり、乳化状のものは微生物分
解を受けやすいが、遊離状のものは乳化させる必要があ
る。特に微生物担持体の表層部には遊離状の油脂が蓄積
されているため、これによって微生物担持体の濾過能力
を低下させ、引いては担持体の寿命を短命化させる惧れ
がある。このようなトラブルを防ぐため、微生物剤とし
て酵素剤入り微生物製剤を用いるべきであり、これによ
って担持体に吸着した微生物の働きを活性化し、油脂分
の分解が促進される。多くの液状酵素剤入り微生物製剤
が市販されているので、適当なものを使用すれば良い。The fats and oils in the wastewater include those in an emulsified state and those in a free state. The emulsified state is susceptible to microbial degradation, but the free state needs to be emulsified. In particular, since free fats and oils are accumulated in the surface layer of the microorganism carrier, there is a possibility that the filtration ability of the microorganism carrier is reduced, and the life of the carrier is shortened. In order to prevent such troubles, a microbial preparation containing an enzyme agent should be used as a microbial agent, whereby the action of the microorganisms adsorbed on the carrier is activated, and the decomposition of fats and oils is promoted. Since many microbial preparations containing a liquid enzyme preparation are commercially available, an appropriate one may be used.
【００１８】本発明の実施に当たっては、自動運転管理
するためのタイマーを設け、エアレーションの間隔、微
生物剤を供給すべきタイミングの設定を行なうことがで
きる。。これらの処理において注意すべき点として、グ
リストラップ装置の構造によっては、厨房残飯が生物フ
ィルターに同伴して目詰まりを起こすことがあり、これ
を回避するため残飯は調理場のシンクで充分に除去する
必要がある。このような場合の微生物担持体の交換は、
濾過能力が極端に低下した場合に上層部における担持体
のみを交換すれば良い。In practicing the present invention, a timer for managing automatic operation can be provided to set the aeration interval and the timing for supplying the microbial agent. . It should be noted that, depending on the structure of the grease trap device, kitchen residue may accompany the biological filter and cause clogging. To avoid this, the residue is sufficiently removed at the kitchen sink. There is a need to. In such a case, the replacement of the microorganism carrier is
When the filtration capacity is extremely reduced, only the carrier in the upper layer needs to be replaced.
【００１９】[0019]
【実施例】以下、本発明を実施例によって具体的に説明
する。The present invention will be specifically described below with reference to examples.
【００２０】実施例１ 図１に示した形式の容量7リットルのグリストラップ装
置１を用いて、人工厨房廃水の濾過試験を行った。微生
物担持体４として粒径３〜８mmの活性炭と粒径２〜７mm
の高温殺菌した軽石（火山質珪酸アルミニウム）を混ぜ
合わせたものを用い、２．５リットル容量の予め底に多
数の透孔４を設けたバケツ状生物フィルター３に、前記
担持体を容量として２．２Ｌ充填し、これをグリストラ
ップ装置１の上部に懸架した。Example 1 Using a grease trap apparatus 1 having a capacity of 7 liters of the type shown in FIG. 1, a filtration test of artificial kitchen wastewater was performed. Activated carbon with a particle size of 3 to 8 mm and a particle size of 2 to 7 mm as the microorganism carrier 4
A mixture of high-temperature-sterilized pumice (volcanic aluminum silicate) and a 2.5-liter bucket-shaped biological filter 3 having a large number of through-holes 4 at the bottom in advance, and the above-mentioned carrier as a capacity of 2 .2 L, and this was suspended above the grease trap device 1.
【００２１】エアレーションパイプ６は直径１０ｍｍ、
長さ１０ｃｍのアクリルパイプに直径１ｍｍの孔を１．
５ｃｍ間隔で開けたものを用い、微生物担持体の表層か
ら５ｃｍの深さに埋設させた。本装置に供給する人工厨
房廃水は、ＢＯＤ３７０，ＣＯＤ１８０，全窒素１２．
４，全リン５．０，ノルマルヘキサン抽出物質量３００
（いずれも単位はｍｇ／Ｌ）のものを用い、毎日７０リ
ットルを１０時間掛けて供給した。The aeration pipe 6 has a diameter of 10 mm,
1. A hole with a diameter of 1 mm was formed in an acrylic pipe having a length of 10 cm.
It was used at intervals of 5 cm and buried at a depth of 5 cm from the surface layer of the microorganism carrier. The artificial kitchen wastewater supplied to the apparatus is BOD370, COD180, total nitrogen12.
4, Total phosphorus 5.0, Normal hexane extractables 300
(All the units are mg / L), and 70 liters were supplied every day for 10 hours.
【００２２】本発明装置の運転はエアレーションを１時
間毎の間欠運転とし、廃水の供給停止のち酵素を含む微
生物剤として、リアルコ社製「ＣＰＬ−６０」（商品
名）の１００倍希釈溶液を１３ｍＬ添加し、その後、翌
日の廃水供給開始までエアーポンプ５の運転を行った。
なおこれらの操作は２台のタイマーを用いて自動的に処
理をさせた。廃水処理の状況は、毎月定期的に濾過され
た排水中のノルマルヘキサン抽出物質量及び生物フィル
ター内の油脂分の蓄積量を測定し、油脂分の除去能力を
調べた。これらの試験結果は表１及び表２に示したとお
りであり、微生物担持体を全く取り替えることなく概ね
１年間使用しても、油脂分の除去能力は低下することは
なく、微生物担持体の目詰まりによる濾過能力の低下も
認められなかった。The operation of the apparatus of the present invention is performed by intermittently operating the aeration every hour. After stopping the supply of wastewater, 13 mL of a 100-fold diluted solution of "CPL-60" (trade name) manufactured by Realco is used as a microbial agent containing enzymes. After the addition, the air pump 5 was operated until the start of wastewater supply the next day.
These operations were automatically processed using two timers. Regarding the state of wastewater treatment, the amount of normal hexane extract in the wastewater filtered periodically and the accumulated amount of oil and fat in the biological filter were measured every month, and the ability to remove oil and fat was examined. The test results are as shown in Tables 1 and 2. Even if the microorganism carrier is used for almost one year without any replacement, the ability to remove fats and oils does not decrease, and No decrease in filtration capacity due to clogging was observed.
【００２３】[0023]
【表１】 [Table 1]
【００２４】[0024]
【表２】 [Table 2]
【００２５】実施例２ 実施例１と同様のグリストラップ装置を用い、異なる微
生物担持体を使用して人工厨房廃水の濾過試験を行っ
た。微生物担持体として、粒径２〜８mmの発泡ポリエチ
レンビーズと粒径２〜７ｍｍのゼオライトを混ぜ合わせ
たものを使用し、その他の処理条件及び試験方法は全て
実施例１と同様にした。Example 2 Using a grease trap apparatus similar to that of Example 1, a filtration test of artificial kitchen wastewater was performed using different microorganism carriers. A mixture of foamed polyethylene beads having a particle size of 2 to 8 mm and zeolite having a particle size of 2 to 7 mm was used as a microorganism carrier, and all other treatment conditions and test methods were the same as in Example 1.
【００２６】廃水処理の状況は、毎月定期的に濾過され
た排水中のノルマルヘキサン抽出物質量を測定し、油脂
分の除去能力を調べた。これらの試験結果は表３に示し
たとおりであり、実施例１と同様に微生物担持体を取り
替えることなく、概ね１年間使用しても油脂分の除去能
力の低下は認められず、微生物担持体の目詰まりによる
濾過能力の低下も観察されなかった。また同様に生物フ
ィルター内の蓄積油分を測定した結果は表４のとおりで
あり、実施例１と同様に１ケ月をピークに減少傾向が見
られた。The condition of the wastewater treatment was determined by measuring the amount of normal hexane extract in the wastewater that was periodically filtered every month, and examining the ability to remove fats and oils. These test results are as shown in Table 3. As in Example 1, there was no decrease in the ability to remove oil and fat even after approximately one year of use without replacing the microorganism carrier. No decrease in filtration capacity due to clogging was observed. The results of similarly measuring the accumulated oil content in the biological filter are as shown in Table 4, and as in Example 1, there was a downward trend with a peak at one month.
【００２７】[0027]
【表３】 [Table 3]
【００２８】[0028]
【表４】 [Table 4]
【００２９】実施例３ 某食鳥肉加工工場のグリストラップ装置を図２に示した
構成として、廃水の油脂分を除去する試験を実施した。
処理廃水の性質は、鳥肉解体時の洗浄廃水と冷凍肉解凍
時の解凍水であり、前者は排水量は少ないが油脂濃度が
高く、後者は水量は多いが油脂濃度が低いという性状を
有している。Example 3 A grease trap device of a certain poultry processing plant was configured as shown in FIG. 2, and a test for removing fats and oils from wastewater was conducted.
The properties of the treated wastewater are washing wastewater at the time of breaking down poultry meat and thawing water at the time of thawing frozen meat.The former has a small amount of wastewater but a high concentration of fats and oils, and the latter has a property that the amount of water is large but the concentration of fats and oils is low. ing.
【００３０】平均的な廃水の流入水量４ｍ３／日、ＣＯ
Ｄ１５０ｍｇ／Ｌ、ノルマルヘキサン抽出物質量は２２
０ｍｇ／Ｌであり、これに１．２m３のグリストラップ
装置を４連設けその後段に個別合併浄化槽があって、生
物処理された排水を河川に放流している。廃水の規模の
割には大きいグリストラップ装置が使用されている理由
については、油分が動物油でありオイルスカムの発生が
大きいこと並びに作業時間が短いことにより、時間当た
りの排水量が多いことに起因している。Average wastewater inflow 4 m 3 / day, CO
D150mg / L, normal hexane extraction substance amount is 22
0 mg / L, and four 1.2 m 3 grease traps were installed in the tank, followed by a separate combined septic tank. The biologically treated wastewater was discharged into the river. The reason why a grease trap device is used for the scale of wastewater is that the oil content is animal oil, oil scum is large, and the work time is short, so the amount of wastewater per hour is large. ing.
【００３１】前記廃水処理装置におけるグリストラップ
装置に、縦６０ｃｍ、横６０ｃｍ、高さ６０ｃｍ（容量
２１６リットル）のステンレス製生物フィルターを設置
した。生物フィルター３の底部には平均径２cmの透孔８
を多数穿ち、そこに金網を敷いて活性炭、ゼオライト、
木炭、軽石の混ぜ合わせた粒径３〜１０ｍｍの微生物担
持体４を１８０リットル充填し、微生物担持体の表層が
グリストラップ装置１の水面レベルと同じになる位置に
生物フィルター３を懸架した。A stainless biological filter having a length of 60 cm, a width of 60 cm, and a height of 60 cm (capacity: 216 liters) was installed in the grease trap device in the wastewater treatment device. The bottom of the biological filter 3 has a through hole 8 with an average diameter of 2 cm.
, Lay a wire mesh there, activated carbon, zeolite,
180 liters of a microorganism carrier 4 having a particle size of 3 to 10 mm in which charcoal and pumice were mixed was filled, and the biological filter 3 was suspended at a position where the surface layer of the microorganism carrier was at the same water level as the grease trap device 1.
【００３２】エアレーションパイプ６は直径1６ｍｍの
塩ビパイプに直径１．５５mmの孔を５ｃｍ間隔で設けた
ものを３本、微生物担持体の表層から１５ｃｍの深さに
埋設した。運転操作は１時間間隔でエアレーションを行
ない、夕方に微生物剤供給装置の定量ポンプを作動して
酵素を含有する微生物剤［リアルコ社製「ＣＰＬ−６
０」］の原液を１０ｍＬ添加した。なおこれらの操作は
タイマーリレー装置を用い自動化して実施し、工場が休
業し廃水が生じない日も同様の運転操作を行った。As the aeration pipe 6, three pipes each having a diameter of 1.55 mm provided at intervals of 5 cm in a PVC pipe having a diameter of 16 mm were buried at a depth of 15 cm from the surface layer of the microorganism carrier. The operation is performed by aeration at hourly intervals, and in the evening, the metering pump of the microbial agent supply device is operated to activate the enzyme-containing microbial agent [CPL-6 manufactured by Realco Inc.]
0 ”] of the stock solution was added. These operations were automated using a timer relay device, and the same operation was performed on days when the factory was closed and no wastewater was generated.
【００３３】廃水処理の状況は、毎月定期的に流入廃水
とグリストラップ装置からの流出する水の水質分析を行
い、油脂分の除去能力を調べた。これらの試験結果は表
５に示したとおりであり、微生物担持体を全く取り替え
ることなく９ヵ月間使用したのちも、油脂分の除去能力
は低下することはなく、また微生物担持体のる目詰まり
に起因する濾過能力の低下も認められなかった。The quality of the wastewater treatment was determined by periodically analyzing the quality of the inflow wastewater and the water flowing out of the grease trap device every month, and examining the ability to remove fats and oils. The results of these tests are shown in Table 5, which shows that the ability to remove fats and oils did not decrease even after the microorganism carrier was used for 9 months without any replacement, and that the microorganism carrier was not clogged. No decrease in the filtration capacity due to the above was also observed.
【００３４】[0034]
【表５】 [Table 5]
【００３５】[0035]
【発明の効果】本発明は、グリストラップの上部位置に
微生物担持体を充填した生物フィルターを設け、油脂分
を含有する廃水のすべてを生物フィルター内に供給し、
流入する油脂分を生物フィルター内に停留させ、油脂分
と微生物担持体に展着した微生物の接触時間を長くさせ
ているため、油脂分の微生物による分解が極めて円滑に
行われ、また常に生物フィルター内を好気性の雰囲気に
維持しているので、長期に亘る連続的処理を為し得るな
ど実践面における効果は多大である。According to the present invention, a biological filter filled with a microorganism carrier is provided at an upper position of a grease trap, and all wastewater containing fats and oils is supplied into the biological filter.
The inflowing fats and oils are retained in the biological filter, and the contact time between the fats and the microorganisms spread on the microorganism carrier is prolonged. Since the interior is maintained in an aerobic atmosphere, there is a great effect in practice, such as continuous processing for a long period of time.
【図１】本発明の実施に適するグリストラップ装置の一
例を示す縦断面図。FIG. 1 is a longitudinal sectional view showing an example of a grease trap device suitable for carrying out the present invention.
【図２】本発明の実施に適するグリストラップ装置の他
の例を示す縦断面図。FIG. 2 is a longitudinal sectional view showing another example of a grease trap device suitable for carrying out the present invention.
【図３】本発明における生物フィルター部分の一例を示
す拡大縦断面図。FIG. 3 is an enlarged vertical sectional view showing an example of a biological filter portion according to the present invention.
１ グリストラップ装置 ２ 廃水供給管 ３ 生物フィルター ４ 微生物担持体 ５ エアポンプ ６ エアレーションパイプ ７ 微生物剤供給装置 ８ 透孔 ９ 排水管 １０ 堰板 １１ スクリーントラップ １２ 揚水装置 １３ 貯水室 １４ 廃水処理室 １５ 隔壁 １６ エアポンプ REFERENCE SIGNS LIST 1 grease trap device 2 wastewater supply pipe 3 biological filter 4 microorganism carrier 5 air pump 6 aeration pipe 7 microbial agent supply device 8 through hole 9 drainage pipe 10 dam plate 11 screen trap 12 pumping device 13 water storage room 14 wastewater treatment room 15 partition wall 16 air pump
Claims (3)
部に微生物を担持させた複数個の微生物担持体を充填し
た生物フィルターを設け、前記生物フィルター内を好気
性雰囲気に維持し、含油廃水を生物フィルター内に供給
し、生物膜濾過された排水を生物フィルターから放出さ
せることを特徴とする含油廃水の処理方法。A biological filter filled with a plurality of microorganism carriers having microorganisms supported on a surface layer is provided at an upper position of a grease trap device, and the biological filter is maintained in an aerobic atmosphere to remove oil-containing wastewater. A method for treating oil-containing wastewater, wherein the wastewater is supplied into a biological filter and discharged from the biological filter after being subjected to biofilm filtration.
部に微生物を担持させた複数個の微生物担持体を充填し
た生物フィルターを配設し、含油廃水を前記生物フィル
ター内に導入する廃水供給管を施し、生物フィルター内
の処理水を曝気させるエアーレイションパイプを設け、
生物フィルターを通過した排水を系外に放出させる排水
管を施したことを特徴とする含油廃水の処理装置。2. A wastewater supply pipe in which a biological filter filled with a plurality of microorganism carriers having microorganisms supported on a surface layer is provided at an upper position of the grease trap device, and an oil-containing wastewater is introduced into the biological filter. To provide an aeration pipe to aerate the treated water in the biological filter,
An oil-containing wastewater treatment device, which is provided with a drain pipe for discharging wastewater that has passed through a biological filter to the outside of the system.
部に微生物を担持させた複数個の微生物担持体を充填し
た生物フィルターを配設し、含油廃水を生物フィター内
に導く揚水装置を施し、生物フィルター内の処理水を曝
気させるエアーレイションパイプを設け、生物フィルタ
ーを通過した排水を系外に放出させる排水管を施したこ
とを特徴とする含油廃水の処理装置。3. A biological filter filled with a plurality of microorganism carriers having microorganisms supported on the surface thereof is disposed at an upper position of the grease trap device, and a pumping device for guiding oil-containing wastewater into the biological filter is provided. An oil-containing wastewater treatment device, comprising: an aeration pipe for aerating treated water in a biological filter; and a drainage pipe for discharging wastewater passing through the biological filter to the outside of the system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000210622A JP2002018460A (en) | 2000-07-12 | 2000-07-12 | Method and apparatus for treating wastewater containing oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000210622A JP2002018460A (en) | 2000-07-12 | 2000-07-12 | Method and apparatus for treating wastewater containing oil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002018460A true JP2002018460A (en) | 2002-01-22 |
Family
ID=18706861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000210622A Pending JP2002018460A (en) | 2000-07-12 | 2000-07-12 | Method and apparatus for treating wastewater containing oil |
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| Country | Link |
|---|---|
| JP (1) | JP2002018460A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004358372A (en) * | 2003-06-05 | 2004-12-24 | Kuniyoshi Higuchi | Method of treating grease-trap waste solution |
| JP2005199167A (en) * | 2004-01-15 | 2005-07-28 | Matsushita Electric Ind Co Ltd | Oil-containing wastewater treatment method and apparatus |
| EP1690833A1 (en) * | 2003-11-04 | 2006-08-16 | Amano Enzyme Inc. | Oil and fat-containing waste water treating apparatus for grease trap and grease trap |
| JP2009050765A (en) * | 2007-08-24 | 2009-03-12 | Hiroshi Takemura | Apparatus for treatment of food waste water |
| JP2017089984A (en) * | 2015-11-11 | 2017-05-25 | 有限会社アクアテック | Filter device in auxiliary cooling device of condenser |
| CN114057359A (en) * | 2021-11-29 | 2022-02-18 | 丽瑾(浙江)环保科技有限公司 | Device for purifying water by microorganisms |
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| JP2017089984A (en) * | 2015-11-11 | 2017-05-25 | 有限会社アクアテック | Filter device in auxiliary cooling device of condenser |
| CN114057359A (en) * | 2021-11-29 | 2022-02-18 | 丽瑾(浙江)环保科技有限公司 | Device for purifying water by microorganisms |
| CN114057359B (en) * | 2021-11-29 | 2024-03-29 | 丽瑾(浙江)环保科技有限公司 | Microorganism water purifying device |
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