JP7130280B1 - Kitchen wastewater treatment system - Google Patents

Kitchen wastewater treatment system Download PDF

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JP7130280B1
JP7130280B1 JP2021112370A JP2021112370A JP7130280B1 JP 7130280 B1 JP7130280 B1 JP 7130280B1 JP 2021112370 A JP2021112370 A JP 2021112370A JP 2021112370 A JP2021112370 A JP 2021112370A JP 7130280 B1 JP7130280 B1 JP 7130280B1
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直史 江渕
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Teral Inc
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    • 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
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Abstract

【課題】油脂分離槽を不要にすることができる、厨房排水処理システムを、提供する。【解決手段】この発明の厨房排水処理システム１は、ファインバブル発生装置３と、厨房排水からなる被処理水が流入される、流量調整槽４と、流量調整槽の直接後段に設けられ、微生物により被処理水が処理される、第１生物反応槽５１と、を備えた、厨房排水処理システムであって、ファインバブル発生装置は、流量調整槽に対しファインバブルを供給し、流量調整槽から第１生物反応槽に、被処理水が、流量が調整されつつ移送され、第１生物反応槽から流量調整槽に、被処理水の一部が返送される。【選択図】図１A kitchen waste water treatment system that eliminates the need for a fat separation tank. A kitchen wastewater treatment system (1) of the present invention includes a fine bubble generator (3), a flow rate adjustment tank (4) into which water to be treated consisting of kitchen wastewater flows, and is provided directly after the flow rate adjustment tank. A kitchen wastewater treatment system comprising a first biological reaction tank 51 in which the water to be treated is treated by the fine bubble generator supplying fine bubbles to the flow rate adjustment tank, and The water to be treated is transferred to the first biological reaction tank while the flow rate is adjusted, and part of the water to be treated is returned from the first biological reaction tank to the flow rate adjustment tank. [Selection drawing] Fig. 1

Description

この発明は、厨房排水処理システムに関するものである。 The present invention relates to a kitchen wastewater treatment system.

従来より、厨房排水から油脂が分離される油脂分離槽を備えた、厨房排水処理システムがある（例えば、特許文献１）。 Conventionally, there is a kitchen wastewater treatment system provided with a fat separation tank for separating fats and oils from kitchen wastewater (for example, Patent Document 1).

特開2018-30098号公報Japanese Patent Application Laid-Open No. 2018-30098

しかしながら、上述のような従来の厨房排水処理システムにおいては、油脂分離槽において浮上した油脂を定期的に引き抜き、引き抜いた油脂を廃棄処分する等の処理が必要であり、ランニングコストが高くなるという問題があった。 However, in the conventional kitchen wastewater treatment system as described above, it is necessary to periodically pull out the fat that has surfaced in the fat separation tank and dispose of the pulled fat, which raises the problem of high running costs. was there.

この発明は、上述した課題を解決するためのものであり、油脂分離槽を不要にすることができる、厨房排水処理システムを、提供することを、目的とするものである。 An object of the present invention is to solve the above-described problems, and to provide a kitchen wastewater treatment system that eliminates the need for a fat separation tank.

本発明の厨房排水処理システムは、
ファインバブル発生装置と、
厨房排水からなる被処理水が流入される、流量調整槽と、
前記流量調整槽の直接後段に設けられ、微生物により前記被処理水が処理される、第１生物反応槽と、
を備えた、厨房排水処理システムであって、
前記ファインバブル発生装置は、前記流量調整槽に対しファインバブルを供給し、
前記流量調整槽から前記第１生物反応槽に、前記被処理水が、流量が調整されつつ移送され、
前記第１生物反応槽から前記流量調整槽に、前記被処理水の一部が返送される。 The kitchen wastewater treatment system of the present invention is
a fine bubble generator;
a flow rate adjustment tank into which the water to be treated consisting of kitchen wastewater flows;
a first biological reaction tank provided immediately after the flow rate adjustment tank, in which the water to be treated is treated with microorganisms;
A kitchen wastewater treatment system comprising
The fine bubble generator supplies fine bubbles to the flow rate adjustment tank,
The water to be treated is transferred from the flow rate adjustment tank to the first biological reaction tank while the flow rate is adjusted,
Part of the water to be treated is returned from the first biological reaction tank to the flow control tank.

本発明の厨房排水処理システムにおいて、
前記流量調整槽では、前記ファインバブルによって、前記被処理水内の油脂が細分化されると、好適である。 In the kitchen wastewater treatment system of the present invention,
It is preferable that the oil in the water to be treated is subdivided by the fine bubbles in the flow rate adjusting tank.

本発明の厨房排水処理システムにおいて、
前記第１生物反応槽では、有機物を処理する有機物処理微生物と、油脂を処理する油脂処理微生物とが、自然発生すると、好適である。 In the kitchen wastewater treatment system of the present invention,
In the first bioreactor, it is preferable that organic matter-treating microorganisms for treating organic matter and oil-and-fat-treating microorganisms for treating oils and fats naturally occur.

本発明の厨房排水処理システムにおいて、
前記第１生物反応槽には、微生物が投入されないと、好適である。 In the kitchen wastewater treatment system of the present invention,
Preferably, the first bioreactor is free of microorganisms.

本発明の厨房排水処理システムにおいて、
前記第１生物反応槽は、微生物保持担体を有し、
前記油脂処理微生物は、前記微生物保持担体に保持されると、好適である。 In the kitchen wastewater treatment system of the present invention,
The first biological reaction tank has a microorganism-retaining carrier,
It is preferable that the fat-treating microorganisms are retained on the microorganism-retaining carrier.

本発明の厨房排水処理システムにおいて、
前記第１生物反応槽から前記流量調整槽に返送される前記被処理水には、前記有機物処理微生物が含まれると、好適である。 In the kitchen wastewater treatment system of the present invention,
It is preferable that the water to be treated returned from the first biological reaction tank to the flow rate adjusting tank contains the organic matter-treating microorganisms.

本発明の厨房排水処理システムにおいて、
前記流量調整槽では、前記有機物処理微生物によって、前記被処理水内の有機物が処理されると、好適である。 In the kitchen wastewater treatment system of the present invention,
It is preferable that organic matter in the water to be treated is treated by the organic matter-treating microorganism in the flow rate adjusting tank.

本発明の厨房排水処理システムにおいて、
前記第１生物反応槽の直接後段に設けられ、微生物により前記被処理水が処理される、第２生物反応槽を、さらに備え、
前記第２生物反応槽から前記流量調整槽に、前記被処理水の一部が返送されてもよい。 In the kitchen wastewater treatment system of the present invention,
further comprising a second biological reaction tank provided immediately after the first biological reaction tank, in which the water to be treated is treated with microorganisms,
A part of the water to be treated may be returned from the second biological reaction tank to the flow rate adjustment tank.

本発明の厨房排水処理システムにおいて、
前記被処理水から油脂が分離される油脂分離槽を、備えないと、好適である。 In the kitchen wastewater treatment system of the present invention,
It is preferable not to provide a fats and oils separation tank for separating fats and oils from the water to be treated.

この発明によれば、油脂分離槽を不要にすることができる、厨房排水処理システムを、提供できる。 ADVANTAGE OF THE INVENTION According to this invention, the kitchen waste water treatment system which can make a fat-and-oils separation tank unnecessary can be provided.

本発明の一実施形態に係る厨房排水処理システムを概略的に示す、概略図である。BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram which shows roughly the kitchen wastewater treatment system which concerns on one Embodiment of this invention. 本発明の他の実施形態に係る厨房排水処理システムを概略的に示す、概略図である。It is a schematic diagram showing roughly a kitchen wastewater treatment system concerning other embodiments of the present invention.

本発明に係る厨房排水処理システムは、任意の厨房（例えばホテルや飲食店等の厨房）からの排水を処理するために好適に利用できるものである。 INDUSTRIAL APPLICABILITY The kitchen wastewater treatment system according to the present invention can be suitably used to treat wastewater from any kitchen (for example, kitchens of hotels, restaurants, etc.).

以下に、図面を参照しつつ、本発明に係る厨房排水処理システムの実施形態を例示説明する。本発明の各実施形態に係る厨房排水処理システム１は、任意の厨房（例えばホテルや飲食店等の厨房）からの排水（以下、「厨房排水」という。）からなる被処理水を処理するために好適に利用できるものである。厨房排水処理システム１によって処理された被処理水は、下水道に放流される。
一般的に、厨房排水は、有機物や油脂を多く含み得る。有機物は、厨房排水内に溶け込む一方、油脂は、厨房排水内に溶け込まない。下水道に放流される排水に対しては、下水道法により、有機物及び油脂の量がそれぞれ所定基準を満たすことが要求されている。具体的に、排水中の有機物に関しては、BOD（生物化学的酸素要求量）が所定範囲内（例えば、600 mg/L未満）であることが要求されており、排水中の油脂に関しては、n-Hex（ノルマルヘキサン抽出物質含有量）が所定範囲内（例えば、30 mg/L以下）であることが要求されている。本発明の各実施形態に係る厨房排水処理システム１は、厨房排水からなる被処理水の有機物及び油脂の量がそれぞれ上記所定基準を満たすように、厨房排水からなる被処理水を処理するように構成されることができる。 An embodiment of a kitchen wastewater treatment system according to the present invention will be exemplified below with reference to the drawings. The kitchen wastewater treatment system 1 according to each embodiment of the present invention is for treating water to be treated consisting of wastewater (hereinafter referred to as "kitchen wastewater") from any kitchen (for example, a kitchen of a hotel or a restaurant). It can be suitably used for The water to be treated that has been treated by the kitchen waste water treatment system 1 is discharged into the sewage system.
In general, kitchen wastewater can contain a large amount of organic matter and fats and oils. Organic matter dissolves in the kitchen wastewater, while fats and oils do not dissolve in the kitchen wastewater. Wastewater discharged into the sewage system is required by the Sewerage Act to satisfy predetermined standards for the amounts of organic substances and oils and fats. Specifically, for organic matter in wastewater, BOD (biochemical oxygen demand) is required to be within a predetermined range (e.g., less than 600 mg/L), and for fats and oils in wastewater, n -Hex (normal-hexane extractable substance content) is required to be within a predetermined range (for example, 30 mg/L or less). The kitchen wastewater treatment system 1 according to each embodiment of the present invention treats the water to be treated, which is kitchen wastewater, so that the amounts of organic substances and fats and oils in the water to be treated, which is kitchen wastewater, satisfy the above-described predetermined standards. can be configured.

図１は、本発明の一実施形態に係る厨房排水処理システム１を概略的に示している。本実施形態の厨房排水処理システム１は、原水受槽２と、ファインバブル発生装置３と、流量調整槽４と、第１生物反応槽５１と、第２生物反応槽５２と、を備えている。
厨房排水処理システム１は、被処理水から油脂が分離される油脂分離槽を、備えていない。 FIG. 1 schematically shows a kitchen wastewater treatment system 1 according to one embodiment of the invention. The kitchen wastewater treatment system 1 of this embodiment includes a raw water receiving tank 2 , a fine bubble generator 3 , a flow rate adjusting tank 4 , a first biological reaction tank 51 and a second biological reaction tank 52 .
The kitchen wastewater treatment system 1 does not have a fat separation tank for separating fats and oils from the water to be treated.

原水受槽２は、厨房（図示せず）からの排水（厨房排水）からなる被処理水を受けるように構成されている。原水受槽２が受けた被処理水は、ポンプ８１等によって、流量調整槽４に移送される。 The raw water receiving tank 2 is configured to receive water to be treated which is waste water (kitchen waste water) from a kitchen (not shown). The water to be treated received by the raw water receiving tank 2 is transferred to the flow rate adjusting tank 4 by a pump 81 or the like.

流量調整槽４は、原水受槽２の直接後段に設けられている。本明細書において、「直接後段に設けられ」とは、間に他の槽を介さずに後段に設けられていることを意味する。
流量調整槽４は、原水受槽２から、被処理水が流入されるように構成されている。流量調整槽４から第１生物反応槽５１には、被処理水が、流量が調整されつつ移送される。例えば、流量調整槽４から第１生物反応槽５１には、被処理水が、所定時間毎に所定量だけ移送されてもよい。流量調整槽４から第１生物反応槽５１に移送される被処理水の流量が調整されることで、第１生物反応槽５１での処理効率を向上できる。流量調整槽４から第１生物反応槽５１への被処理水の移送は、例えば、図示しないポンプ及び／又は計量装置を介して、行われる。 The flow rate adjusting tank 4 is provided directly behind the raw water receiving tank 2 . In the present specification, "provided directly in the subsequent stage" means provided in the subsequent stage without intervening another tank.
The flow rate adjusting tank 4 is configured so that the water to be treated flows from the raw water receiving tank 2 . The water to be treated is transferred from the flow rate adjustment tank 4 to the first biological reaction tank 51 while the flow rate is adjusted. For example, a predetermined amount of water to be treated may be transferred from the flow rate adjusting tank 4 to the first biological reaction tank 51 at predetermined intervals. By adjusting the flow rate of the water to be treated transferred from the flow rate adjusting tank 4 to the first biological reaction tank 51, the treatment efficiency in the first biological reaction tank 51 can be improved. Transfer of the water to be treated from the flow rate adjustment tank 4 to the first biological reaction tank 51 is performed, for example, via a pump and/or metering device (not shown).

ファインバブル発生装置３は、流量調整槽４に対しファインバブルを供給するように構成されている。ファインバブル発生装置３は、任意の構成により、流量調整槽４に対しファインバブルを供給するように構成されてよい。例えば、ファインバブル発生装置３は、流量調整槽４から、被処理水の一部を、ポンプ８２を介して、外部からの空気とともに受け取り、当該被処理水を、ファインバブルを含む状態で流量調整槽４に戻すことにより、流量調整槽４に対しファインバブルを供給するように構成されてもよい。
ファインバブル発生装置３によって流量調整槽４に供給されるファインバブルは、直径の平均値が、１００μｍ未満であると好適であり、１μｍ以下であるとより好適であり、０．４μｍ以下であるとさらに好適である。 The fine bubble generator 3 is configured to supply fine bubbles to the flow rate adjusting tank 4 . The fine bubble generator 3 may be configured to supply fine bubbles to the flow rate adjusting tank 4 by any configuration. For example, the fine bubble generator 3 receives part of the water to be treated from the flow rate adjustment tank 4 via the pump 82 together with air from the outside, and adjusts the flow rate of the water to be treated while containing fine bubbles. It may be configured to supply fine bubbles to the flow rate adjustment tank 4 by returning it to the tank 4 .
The fine bubbles supplied to the flow rate adjustment tank 4 by the fine bubble generator 3 preferably have an average diameter of less than 100 μm, more preferably 1 μm or less, and 0.4 μm or less. It is even more preferable.

流量調整槽４では、ファインバブル発生装置３から供給されるファインバブルによって、被処理水内の油脂が細分化（微細化）される。また、流量調整槽４では、ファインバブル発生装置３から供給されるファインバブルによって、仮にファインバブル発生装置３からファインバブルが供給されない場合に比べて、被処理水の酸素溶解効率が向上される。 In the flow rate adjusting tank 4 , the fine bubbles supplied from the fine bubble generator 3 subdivide (miniaturize) fats and oils in the water to be treated. In addition, in the flow rate adjusting tank 4, the oxygen dissolution efficiency of the water to be treated is improved by the fine bubbles supplied from the fine bubble generator 3, compared to the case where the fine bubbles are not supplied from the fine bubble generator 3.

流量調整槽４において、被処理水は、略所定時間（例えば約１２時間）にわたって、留まる（処理される）。 In the flow rate adjusting tank 4, the water to be treated stays (is treated) for a substantially predetermined period of time (for example, about 12 hours).

第１生物反応槽５１は、流量調整槽４の直接後段に設けられている。第２生物反応槽５２は、第１生物反応槽５１の直接後段に設けられている。第１生物反応槽５１から第２生物反応槽５２には、被処理水が移送される。第１生物反応槽５１及び第２生物反応槽５２では、それぞれ、微生物により被処理水が処理される。
第１生物反応槽５１及び第２生物反応槽５２では、それぞれ、有機物を処理（具体的には、分解）する有機物処理微生物と、油脂を処理（具体的には、分解）する油脂処理微生物とが、自然発生する。ここで、「自然発生する」とは、外部から投入されることなく存在することを意味する。具体的には、空気中等に存在する微生物（有機物処理微生物及び油脂処理微生物）がそれぞれ第１生物反応槽５１及び第２生物反応槽５２内で増殖することにより、これらの微生物が第１生物反応槽５１及び第２生物反応槽５２で自然発生する。第１生物反応槽５１及び第２生物反応槽５２には、微生物が投入されないと好適である。したがって、第１生物反応槽５１及び第２生物反応槽５２内の微生物は、すべて自然発生によるものであると、好適である。
有機物処理微生物によって被処理水内の有機物が処理（具体的には、分解）され、油脂処理微生物によって被処理水内の油脂が処理（具体的には、分解）される。有機物処理微生物としては、例えば、ラクトコッカス属、アシネトバクター属が挙げられる。油脂処理微生物としては、例えば、スフィンゴビウム属が挙げられる。
本実施形態において、有機物処理微生物及び油脂処理微生物は、それぞれ、好気性微生物であり、酸素を必要とする。 The first biological reaction tank 51 is provided directly behind the flow rate adjusting tank 4 . The second biological reactor 52 is provided immediately after the first biological reactor 51 . Water to be treated is transferred from the first biological reaction tank 51 to the second biological reaction tank 52 . In each of the first biological reaction tank 51 and the second biological reaction tank 52, water to be treated is treated with microorganisms.
In the first biological reaction tank 51 and the second biological reaction tank 52, respectively, organic substance processing microorganisms for processing (specifically, decomposing) organic substances and oil and fat processing microorganisms for processing (specifically, decomposing) oils and fats are used. is naturally occurring. Here, "naturally occurring" means existing without input from the outside. Specifically, microorganisms (organic matter processing microorganisms and oil processing microorganisms) present in the air or the like proliferate in the first biological reaction tank 51 and the second biological reaction tank 52, respectively, so that these microorganisms become the first biological reaction. It occurs spontaneously in tank 51 and second bioreactor 52 . Microorganisms are preferably not introduced into the first biological reaction tank 51 and the second biological reaction tank 52 . Therefore, it is preferable that the microorganisms in the first biological reactor 51 and the second biological reactor 52 are all naturally occurring.
Organic substances in the water to be treated are treated (specifically, decomposed) by the organic matter-treating microorganisms, and oils and fats in the water to be treated are treated (specifically, decomposed) by the oil-and-fat-treating microorganisms. Examples of organic matter-treating microorganisms include Lactococcus and Acinetobacter. Examples of fat-processing microorganisms include the genus Sphingobium.
In this embodiment, the organic matter-processing microorganisms and the fat-processing microorganisms are aerobic microorganisms and require oxygen.

第１生物反応槽５１及び第２生物反応槽５２のそれぞれから流量調整槽４には、被処理水の一部が返送される。つまり、流量調整槽４と第１生物反応槽５１及び第２生物反応槽５２との間で、被処理水の一部が循環する。第１生物反応槽５１及び第２生物反応槽５２のそれぞれから流量調整槽４に返送される被処理水には、微生物が含まれる。
第１生物反応槽５１及び第２生物反応槽５２は、それぞれ、微生物保持担体７を有していると、好適である。微生物保持担体７は、微生物を保持できるように構成されており、例えば多孔質体からなり、例えばウレタンフォームから構成される。
本実施形態において、有機物処理微生物は流量調整槽４で有機物を処理する。このとき有機物処理微生物の大半は、凝集（フロック化）され、第１生物反応槽５１、第２生物反応槽５２へ移行する。有機物処理微生物は、水中でフロック化しており、その一部または全部が、微生物保持担体７に付着しない（すなわち、微生物保持担体７に保持されない）傾向がある。一方、第１生物反応槽５１、第２生物反応槽５２では、油脂処理微生物が微生物保持担体７上でファインバブル発生装置３により微細化された油脂を処理できる環境となり、結果的に油脂処理微生物が微生物保持担体７上に優先的に残り、安定的に油脂処理が実現できる。そのため、第１生物反応槽５１及び第２生物反応槽５２のそれぞれから流量調整槽４に返送される被処理水には、有機物処理微生物が含まれる。油脂処理微生物は、微生物保持担体７に保持されるため、第１生物反応槽５１及び第２生物反応槽５２のそれぞれから流量調整槽４に返送される被処理水にはほとんど含まれない。微生物保持担体７（及び、それに付着している微生物）は、流量調整槽４に返送されない。 Part of the water to be treated is returned to the flow rate adjusting tank 4 from each of the first biological reaction tank 51 and the second biological reaction tank 52 . That is, part of the water to be treated circulates between the flow rate adjusting tank 4 and the first biological reaction tank 51 and the second biological reaction tank 52 . The water to be treated that is returned from each of the first biological reaction tank 51 and the second biological reaction tank 52 to the flow control tank 4 contains microorganisms.
It is preferable that the first biological reaction tank 51 and the second biological reaction tank 52 each have a microorganism holding carrier 7 . The microorganism-retaining carrier 7 is configured to retain microorganisms, and is made of, for example, a porous material such as urethane foam.
In this embodiment, the organic matter-treating microorganisms treat organic matter in the flow control tank 4 . At this time, most of the organic matter-treating microorganisms are aggregated (flocculated) and transferred to the first biological reactor 51 and the second biological reactor 52 . The organic matter-treating microorganisms are flocculated in water, and some or all of them tend not to adhere to the microorganism-holding carrier 7 (that is, not held on the microorganism-holding carrier 7). On the other hand, in the first biological reaction tank 51 and the second biological reaction tank 52, an environment is created in which the oil-treating microorganisms can treat the oil that has been micronized by the fine bubble generator 3 on the microorganism-holding carrier 7, and as a result, the oil-treating microorganisms preferentially remains on the microorganism-holding carrier 7, and stable oil treatment can be realized. Therefore, the water to be treated that is returned from each of the first biological reaction tank 51 and the second biological reaction tank 52 to the flow rate adjusting tank 4 contains organic matter-treating microorganisms. Since the oil-processing microorganisms are retained in the microorganism-retaining carrier 7, they are hardly contained in the water to be treated returned to the flow rate adjustment tank 4 from the first biological reaction tank 51 and the second biological reaction tank 52, respectively. The microorganism-holding carrier 7 (and the microorganisms adhering to it) are not returned to the flow control tank 4 .

第１生物反応槽５１及び第２生物反応槽５２では、ばっ気処理がされていると、好適である。これにより、第１生物反応槽５１及び第２生物反応槽５２内の被処理水に、より多くの酸素を供給でき、第１生物反応槽５１及び第２生物反応槽５２内の微生物をより活性化できる。具体的に、例えば、第１生物反応槽５１及び第２生物反応槽５２は、それぞれ、散気管６２ａ、６２ｂを有し、ばっ気ブロワ６１から散気管６２ａ、６２ｂを介して第１生物反応槽５１及び第２生物反応槽５２内の被処理水内に空気が送られるようにされていると、好適である。 It is preferable that the first biological reaction tank 51 and the second biological reaction tank 52 are aerated. As a result, more oxygen can be supplied to the water to be treated in the first biological reaction tank 51 and the second biological reaction tank 52, and the microorganisms in the first biological reaction tank 51 and the second biological reaction tank 52 are more activated. can be Specifically, for example, the first bioreactor 51 and the second bioreactor 52 have air diffusers 62a and 62b, respectively. It is preferable to send air into the water to be treated in 51 and second biological reactor 52 .

第１生物反応槽５１及び第２生物反応槽５２において、被処理水は、略所定時間（例えば、第１生物反応槽５１及び第２生物反応槽５２を合わせて見たときに約２０時間）にわたって、留まる（処理される）。 In the first biological reaction tank 51 and the second biological reaction tank 52, the water to be treated is treated for approximately a predetermined time (for example, about 20 hours when the first biological reaction tank 51 and the second biological reaction tank 52 are combined). stays (processed) over

流量調整槽４では、第１生物反応槽５１及び第２生物反応槽５２のそれぞれから流量調整槽４に返送される被処理水に含まれる有機物処理微生物によって、被処理水内の有機物が処理される。
流量調整槽４では、有機物処理微生物が有機物を処理する分、被処理水内の有機物処理微生物及び有機物は減少する。第１生物反応槽５１及び第２生物反応槽５２では、残りの有機物処理微生物によって、流量調整槽４で処理しきれずに残った有機物が処理され得る。 In the flow regulating tank 4, the organic matter in the water to be treated is treated by the organic matter-treating microorganisms contained in the water to be treated that is returned to the flow regulating tank 4 from the first biological reaction tank 51 and the second biological reaction tank 52, respectively. be.
In the flow rate adjusting tank 4, the amount of organic matter-treating microorganisms and organic matter in the water to be treated is reduced as the organic matter-treating microorganisms treat the organic matter. In the first biological reaction tank 51 and the second biological reaction tank 52 , the remaining organic matter that has not been completely treated in the flow rate adjusting tank 4 can be treated by the remaining organic matter treating microorganisms.

第２生物反応槽５２から流出した被処理水は、下水道に放流される。 The water to be treated that has flowed out of the second biological reaction tank 52 is discharged into the sewage system.

ここで、本実施形態の効果を説明する。
本実施形態によれば、ファインバブル発生装置３が流量調整槽４に対しファインバブルを供給するので、流量調整槽４において被処理水内の油脂が細分化（微細化）される。そのため、第１生物反応槽５１や第２生物反応槽５２において、油脂処理微生物による油脂の処理がし易くなるので、油脂処理微生物による油脂の処理効率が向上する。
また、本実施形態によれば、上述のように、第１生物反応槽５１や第２生物反応槽５２から流量調整槽４に被処理水の一部が返送されるので、流量調整槽４において、第１生物反応槽５１や第２生物反応槽５２から返送された被処理水に含まれる微生物によって、被処理水をある程度処理できるので、その分、第１生物反応槽５１や第２生物反応槽５２における被処理水の処理負荷を軽減でき、ひいては、第１生物反応槽５１や第２生物反応槽５２での被処理水の処理効率を向上できる。具体的には、流量調整槽４において、有機物処理微生物が有機物を処理する分、流量調整槽４において有機物処理微生物が減少するため、第１生物反応槽５１や第２生物反応槽５２においては、有機物処理微生物が少なくなり、その分、油脂処理微生物が酸素をより多く摂取でき、ひいては、油脂処理微生物による油脂の処理効率が向上する。特に、本実施形態によれば、上述のように、流量調整槽４の直接後段の第１生物反応槽５１から流量調整槽４に被処理水の一部が返送されるので、仮に流量調整槽４より複数後段の槽から流量調整槽４に被処理水の一部が返送される場合に比べて、より活性のある微生物を、また、より多くの微生物を、流量調整槽４に返送することができ、ひいては、流量調整槽４における処理効率をさらに向上できる。なお、微生物の生存時間は、例えば半日程度と短いため、微生物が各槽に存在する時間を考慮すると、第１生物反応槽５１に存在する微生物の方が、それより後段の槽に存在する微生物よりも、より多く存在し、また、より活性が高い傾向がある。また、微生物の数は、処理対象（有機物や油脂）が減少すると、減少するため、処理の初期段階にある第１生物反応槽５１の方が、それより後段の槽に比べて、微生物は多く存在する。
また、本実施形態によれば、上述のように、流量調整槽４にファインバブルが供給されるとともに、第１生物反応槽５１や第２生物反応槽５２から流量調整槽４に被処理水の一部が返送される。そのため、流量調整槽４において、ファインバブルによって被処理水の酸素溶解効率が向上されるので、流量調整槽４において、第１生物反応槽５１から流量調整槽４に返送される被処理水に含まれる微生物（有機物処理微生物）が活性化され、ひいては、流量調整槽４において、当該微生物（有機物処理微生物）による被処理水の処理効率（有機物の処理効率）が向上する。また、その分、第１生物反応槽５１や第２生物反応槽５２における被処理水の処理負荷を軽減できる。
このように、本実施形態によれば、油脂の処理効率が向上するので、油脂分離槽が不要になり、ひいては、ランニングコストを低減できる。また、油脂の処理効率が向上するので、第１生物反応槽５１や第２生物反応槽５２の小型化、ひいては、厨房排水処理システム１の省スペース化も、可能になる。また、第１生物反応槽５１や第２生物反応槽５２での処理時間の短縮も可能になる。 Here, the effects of this embodiment will be described.
According to the present embodiment, the fine bubble generator 3 supplies fine bubbles to the flow rate adjusting tank 4 , so that the oils and fats in the water to be treated are subdivided (miniaturized) in the flow rate adjusting tank 4 . Therefore, in the first biological reaction tank 51 and the second biological reaction tank 52, it becomes easy to process the fats and oils by the fat-treating microorganisms, so that the processing efficiency of the fats and oils by the fat-treating microorganisms is improved.
Further, according to the present embodiment, as described above, part of the water to be treated is returned from the first biological reaction tank 51 and the second biological reaction tank 52 to the flow rate adjustment tank 4. Since the water to be treated can be treated to some extent by the microorganisms contained in the water to be treated returned from the first biological reaction tank 51 and the second biological reaction tank 52, the first biological reaction tank 51 and the second biological reaction can be used accordingly. The treatment load of the water to be treated in the tank 52 can be reduced, and the treatment efficiency of the water to be treated in the first biological reaction tank 51 and the second biological reaction tank 52 can be improved. Specifically, in the flow rate adjusting tank 4, the organic matter treating microorganisms treat the organic matter, and the organic matter treating microorganisms in the flow rate adjusting tank 4 are reduced. The number of organic matter-treating microorganisms is reduced, so that the fat-treating microorganisms can take in more oxygen, and the efficiency of the fat-treating microorganisms is improved. In particular, according to the present embodiment, as described above, part of the water to be treated is returned from the first biological reaction tank 51 directly downstream of the flow rate adjustment tank 4 to the flow rate adjustment tank 4. Returning more active microorganisms and more microorganisms to the flow rate adjustment tank 4 compared to the case where a part of the water to be treated is returned to the flow rate adjustment tank 4 from a plurality of tanks subsequent to 4. , and the treatment efficiency in the flow rate adjusting tank 4 can be further improved. Since the survival time of microorganisms is short, for example, about half a day, considering the time that microorganisms exist in each tank, the microorganisms that exist in the first biological reaction tank 51 are the microorganisms that exist in the subsequent tanks. It tends to be more abundant and more active than In addition, since the number of microorganisms decreases as the number of objects to be treated (organic substances and oils and fats) decreases, the number of microorganisms in the first biological reaction tank 51, which is in the initial stage of treatment, is greater than in the tanks in the later stages. exist.
Further, according to the present embodiment, as described above, fine bubbles are supplied to the flow rate adjustment tank 4, and the water to be treated is supplied from the first biological reaction tank 51 and the second biological reaction tank 52 to the flow rate adjustment tank 4. Some are sent back. Therefore, in the flow adjustment tank 4, the oxygen dissolution efficiency of the water to be treated is improved by the fine bubbles. The microorganisms (organic matter-treating microorganisms) are activated, and the treatment efficiency (organic matter treatment efficiency) of the water to be treated by the microorganisms (organic matter-treating microorganisms) in the flow rate adjusting tank 4 is improved. Moreover, the processing load of the water to be treated in the first biological reaction tank 51 and the second biological reaction tank 52 can be reduced accordingly.
Thus, according to this embodiment, since the processing efficiency of fats and oils is improved, the fats and oils separation tank becomes unnecessary, and the running cost can be reduced. In addition, since the efficiency of treating oils and fats is improved, the size of the first biological reaction tank 51 and the second biological reaction tank 52 can be reduced, and the space of the kitchen wastewater treatment system 1 can be reduced. Moreover, the processing time in the first biological reaction tank 51 and the second biological reaction tank 52 can be shortened.

また、本実施形態によれば、第１生物反応槽５１や第２生物反応槽５２は微生物保持担体７を有し、油脂処理微生物は微生物保持担体７に保持される（微生物保持担体７は流量調整槽４に返送されない）ので、第１生物反応槽５１や第２生物反応槽５２において、油脂処理微生物を第１生物反応槽５１や第２生物反応槽５２内に安定的に留めることができ、ひいては、油脂処理微生物による油脂の処理効率が向上する。
また、本実施形態によれば、流量調整槽４に対しファインバブルが供給され、第１生物反応槽５１や第２生物反応槽５２は微生物保持担体７を有し、油脂処理微生物は微生物保持担体７に保持されるので、微生物保持担体７に保持される油脂処理微生物に酸素をより効率的に供給でき、油脂処理微生物による油脂の処理効率が向上する。
また、本実施形態によれば、流量調整槽４において、ファインバブルによって被処理水内の油脂が細分化（微細化）されるので、第１生物反応槽５１や第２生物反応槽５２において、油脂が微生物保持担体７を覆いにくくなる。そのため、微生物保持担体７の内部へ酸素が届きやすくなり、ひいては、微生物保持担体７の内部に存在する油脂処理微生物がより活性化されるので、油脂処理微生物による油脂の処理効率が向上する。
また、本実施形態によれば、流量調整槽４に対しファインバブルが供給され、第１生物反応槽５１や第２生物反応槽５２から流量調整槽４に被処理水の一部が返送され、第１生物反応槽５１や第２生物反応槽５２は微生物保持担体７を有し、油脂処理微生物は微生物保持担体７に保持されるので、流量調整槽４で有機物が処理されて有機物処理微生物が減少する分、第１生物反応槽５１や第２生物反応槽５２において油脂処理微生物により多くの酸素が行きわたるとともに、微生物保持担体７によって油脂処理微生物を安定的に留めることができ、また、ファインバブルが微生物保持担体７に付着することによって、微生物保持担体７に保持される油脂処理微生物に酸素をより効率的に供給できるので、第１生物反応槽５１や第２生物反応槽５２に微生物を投入せずとも、自然発生する微生物だけで十分に処理が可能である。 Further, according to the present embodiment, the first biological reaction tank 51 and the second biological reaction tank 52 have the microorganism holding carrier 7, and the oil-processing microorganism is held in the microorganism holding carrier 7 (the microorganism holding carrier 7 has a flow rate of Therefore, in the first biological reaction tank 51 and the second biological reaction tank 52, the oil-treating microorganisms can be stably retained in the first biological reaction tank 51 and the second biological reaction tank 52. Furthermore, the processing efficiency of fats and oils by the fat-treating microorganisms is improved.
Further, according to this embodiment, fine bubbles are supplied to the flow rate adjusting tank 4, the first biological reaction tank 51 and the second biological reaction tank 52 have the microorganism holding carrier 7, and the oil and fat treatment microorganisms are the microorganism holding carrier 7, oxygen can be more efficiently supplied to the fat-treating microorganisms retained in the microorganism-holding carrier 7, and the efficiency of processing the fats and oils by the fat-treating microorganisms is improved.
Further, according to the present embodiment, in the flow rate adjustment tank 4, the oil and fat in the water to be treated are subdivided (miniaturized) by the fine bubbles, so in the first biological reaction tank 51 and the second biological reaction tank 52, It becomes difficult for fats and oils to cover the microorganism holding carrier 7 . Therefore, it becomes easier for oxygen to reach the inside of the microorganism-holding carrier 7, and the oil-treating microorganisms existing inside the microorganism-holding carrier 7 are further activated, so that the efficiency of treating the oil by the oil-treating microorganisms is improved.
Further, according to the present embodiment, fine bubbles are supplied to the flow rate adjustment tank 4, part of the water to be treated is returned from the first biological reaction tank 51 and the second biological reaction tank 52 to the flow rate adjustment tank 4, Since the first biological reaction tank 51 and the second biological reaction tank 52 have the microorganism holding carrier 7, and the oil and fat treating microorganisms are held in the microorganism holding carrier 7, the organic matter is treated in the flow rate adjusting tank 4 and the organic matter treated microorganisms are produced. Due to the decrease, more oxygen is distributed to the oil-processing microorganisms in the first biological reaction tank 51 and the second biological reaction tank 52, and the microorganism-retaining carrier 7 can stably retain the oil-processing microorganisms. By attaching the bubbles to the microorganism-holding carrier 7, oxygen can be more efficiently supplied to the oil-processing microorganisms held in the microorganism-holding carrier 7, so that the microorganisms can be supplied to the first biological reaction tank 51 and the second biological reaction tank 52. It is possible to sufficiently treat with naturally occurring microorganisms alone without inputting.

なお、上述した第１実施形態では、第１生物反応槽５１及び第２生物反応槽５２が設けられているが、図２に示す第２実施形態のように、第２生物反応槽５２を設けずに、第１生物反応槽５１のみを設けるようにしてもよい。その場合、第１生物反応槽５１から流出した被処理水は、下水道に放流される。第２実施形態においても、上述した第１実施形態と同様の効果が得られる。
また、上述した第１実施形態において、第２生物反応槽５２から流量調整槽４に、被処理水が返送されないようにしてもよい。 In the first embodiment described above, the first biological reaction tank 51 and the second biological reaction tank 52 are provided, but the second biological reaction tank 52 is provided as in the second embodiment shown in FIG. Instead, only the first biological reaction tank 51 may be provided. In that case, the water to be treated that has flowed out of the first biological reaction tank 51 is discharged into the sewage system. Also in the second embodiment, effects similar to those of the above-described first embodiment can be obtained.
Moreover, in the first embodiment described above, the water to be treated may not be returned from the second biological reaction tank 52 to the flow rate adjustment tank 4 .

上述した各実施形態において、原水受槽２は設けられなくてもよい。その場合、厨房排水は、流量調整槽４に直接流入するようにされてもよい。 In each embodiment described above, the raw water receiving tank 2 may not be provided. In that case, the kitchen waste water may flow directly into the flow rate adjusting tank 4 .

本発明に係る厨房排水処理システムは、任意の厨房（例えばホテルや飲食店等の厨房）からの排水を処理するために好適に利用できるものである。 INDUSTRIAL APPLICABILITY The kitchen wastewater treatment system according to the present invention can be suitably used to treat wastewater from any kitchen (for example, kitchens of hotels, restaurants, etc.).

１ 厨房排水処理システム
２ 原水受槽
３ ファインバブル発生装置
４ 流量調整槽
５１ 第１生物反応槽
５２ 第２生物反応槽
６１ ばっ気ブロワ
６２ａ、６２ｂ 散気管
７ 微生物保持担体
８１、８２ ポンプ 1 Kitchen wastewater treatment system 2 Raw water receiving tank 3 Fine bubble generator 4 Flow rate adjusting tank 51 First biological reaction tank 52 Second biological reaction tank 61 Aeration blowers 62a, 62b Air diffuser 7 Microorganism holding carriers 81, 82 Pump

Claims (4)

ファインバブル発生装置と、
厨房排水からなる被処理水が流入される、流量調整槽と、
前記流量調整槽の直接後段に設けられ、微生物により前記被処理水が処理される、第１生物反応槽と、
を備えた、厨房排水処理システムであって、
前記ファインバブル発生装置は、前記流量調整槽に対しファインバブルを供給し、
前記流量調整槽から前記第１生物反応槽に、前記被処理水が、流量が調整されつつ移送され、
前記第１生物反応槽から前記流量調整槽に、前記被処理水の一部が返送され、
前記ファインバブルは、直径の平均値が０．４μｍ以下であり、
前記流量調整槽では、前記ファインバブルによって、前記被処理水内の油脂が細分化され、
前記第１生物反応槽では、有機物を処理する有機物処理微生物と、油脂を処理する油脂処理微生物とが、自然発生し、
前記第１生物反応槽は、微生物保持担体を有し、
前記油脂処理微生物は、前記微生物保持担体に保持され、
前記第１生物反応槽から前記流量調整槽に返送される前記被処理水には、前記有機物処理微生物が含まれ、
前記流量調整槽では、前記有機物処理微生物によって、前記被処理水内の有機物が処理される、厨房排水処理システム。 a fine bubble generator;
a flow rate adjustment tank into which the water to be treated consisting of kitchen wastewater flows;
a first biological reaction tank provided immediately after the flow rate adjustment tank, in which the water to be treated is treated with microorganisms;
A kitchen wastewater treatment system comprising
The fine bubble generator supplies fine bubbles to the flow rate adjustment tank,
The water to be treated is transferred from the flow rate adjustment tank to the first biological reaction tank while the flow rate is adjusted,
Part of the water to be treated is returned from the first biological reaction tank to the flow rate adjustment tank ,
The fine bubbles have an average diameter of 0.4 μm or less,
In the flow rate adjusting tank, the oil and fat in the water to be treated are subdivided by the fine bubbles,
In the first biological reaction tank, organic matter-treating microorganisms for treating organic matter and oil-and-fat-treating microorganisms for treating oils and fats are naturally generated,
The first biological reaction tank has a microorganism-retaining carrier,
The fat-treating microorganisms are retained in the microorganism-retaining carrier,
The water to be treated returned from the first biological reaction tank to the flow rate adjustment tank contains the organic matter-treating microorganisms,
A kitchen wastewater treatment system , wherein organic matter in the water to be treated is treated by the organic matter-treating microorganism in the flow rate adjusting tank . 前記第１生物反応槽には、微生物が投入されない、請求項１に記載の厨房排水処理システム。 The kitchen wastewater treatment system according to claim 1 , wherein no microorganisms are introduced into said first biological reactor. 前記第１生物反応槽の直接後段に設けられ、微生物により前記被処理水が処理される、第２生物反応槽を、さらに備え、
前記第２生物反応槽から前記流量調整槽に、前記被処理水の一部が返送される、請求項１又は２に記載の厨房排水処理システム。 further comprising a second biological reaction tank provided immediately after the first biological reaction tank, in which the water to be treated is treated with microorganisms,
3. The kitchen wastewater treatment system according to claim 1 or 2 , wherein part of said water to be treated is returned from said second biological reaction tank to said flow rate adjusting tank. 前記被処理水から油脂が分離される油脂分離槽を、備えない、請求項１～３のいずれか一項に記載の厨房排水処理システム。 The kitchen wastewater treatment system according to any one of claims 1 to 3 , which does not include a fat separation tank for separating fats and oils from the water to be treated.
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