JP2004351269A - Method for microbial degradation treatment of waste water and apparatus for mixing waste water treating agent - Google Patents

Method for microbial degradation treatment of waste water and apparatus for mixing waste water treating agent Download PDF

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Publication number
JP2004351269A
JP2004351269A JP2003149472A JP2003149472A JP2004351269A JP 2004351269 A JP2004351269 A JP 2004351269A JP 2003149472 A JP2003149472 A JP 2003149472A JP 2003149472 A JP2003149472 A JP 2003149472A JP 2004351269 A JP2004351269 A JP 2004351269A
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Prior art keywords
water
mineral particles
wastewater
container
treating agent
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JP2003149472A
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Japanese (ja)
Inventor
Fumihiko Yoshimura
文彦 吉村
Yoshinobu Higashihara
吉伸 東原
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TENSHO GIKEN KK
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TENSHO GIKEN KK
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Priority to JP2003149472A priority Critical patent/JP2004351269A/en
Priority to CNB2004100321225A priority patent/CN1289410C/en
Priority to TW093110835A priority patent/TW200508156A/en
Priority to KR1020040031238A priority patent/KR20040101906A/en
Publication of JP2004351269A publication Critical patent/JP2004351269A/en
Priority to HK05105246A priority patent/HK1071881A1/en
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/02Aerobic processes
    • C02F3/06Aerobic processes using submerged filters
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00Specific treatment goals
    • C02F2303/02Odour removal or prevention of malodour
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00Technologies for wastewater treatment
    • Y02W10/10Biological treatment of water, waste water, or sewage

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for microbial degradation of waste water by which a bad smell can be eliminated simply from a sewage line of an anaerobic state to a sewage storage tank and the sewage can be treated in a satisfactorily clean condition without emitting the bad smell and leaving deposits such as waste oil in the sewage line, and to provide an apparatus which is used in this method the structure of which is made comparatively simpler and which is made compact. <P>SOLUTION: In an apparatus for mixing a waste water treating agent, a deposition layer of mineral particles 3 which contain aluminum oxide and have around 10 mm diameter is formed below the standard water surface of a stainless steel-made vessel 2 to which a city water pipeline 1 is connected. An air diffusing member 5 is arranged below the deposition layer via a water-permeating partition table 4 consisting of a punched metal plate between them. A pipe 14 of supplying the compressed air forcibly-sent from an air pump 12 is connected to the member 5. When the mineral particles 3 are vibrated by an air bubble stream emitted from the air diffusing member 5 into the water, each of the particles 3 is broken into pieces by mutual friction to yield a powdery treating agent. A treating agent-mixing pipeline 6 is provided for supplying the powdery treating agent-dispersed water to the water to be treated outside the vessel 2. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
この発明は、油脂などを含有する生活廃水や工業排水その他の廃水を微生物分解により浄化処理する廃水の微生物分解処理方法およびその方法に用いる廃水処理剤の混入装置に関する。
【0002】
【従来の技術】
一般に、生活廃水や工業排水などの廃水には、油脂、蛋白質、澱粉、界面活性剤など種々の有機物が混入し、これを浄化して自然界に戻すことが人間の生活環境を維持するためにも重要なことと考えられる。
【0003】
通常、油脂などを含有する生活廃水や工業排水を処理するには、まず発生源施設の近くに汚水溜槽やグリーストラップを設け、さらに最終的に処理される下水処理場などにはろ過、沈殿、物理化学的浄化処理の施設を設け、さらには生物学的浄化処理施設を設けるようにしている。
【0004】
廃水の発生源近くに設置される汚水溜槽やグリーストラップは、下水配管に固形物や油脂が流入するのを防止して、防臭機能もある程度は果たすものであるが、これらに油脂などが滞留すると、処理能力が低下し、さらには嫌気的な状態で放置されると滞留物が変質して、硫化水素、アミン、アンモニアなどが化学反応して悪臭のある硫黄性ガスなどを発生する。
【0005】
このような事態を防止するために、通常は、滞留した油脂などを汚水溜槽やグリーストラップの上層または下層に浮上させ、または沈殿させて分離し、定期的に槽外へ取り出して処理するメンテナンスが採用されている。
【0006】
また、廃水浄化のために好適な微生物を用いた処理方法としては、臭気や汚濁の原因となる有機物を分解する好気性微生物または嫌気性微生物を多孔質の培養基材に担持させ、これらの培養基材に有用な微生物群が繁殖した状態で廃水を接触ろ過させてこれを浄化処理するようにしている。
【0007】
例えば、動物性油脂などの油脂を含む廃水を微生物分解によって処理するには、低濃度のアルミニウムイオンおよびゼオライトなどの鉱物片を添加し、腐敗臭の発生を防止して微生物分解処理する方法が知られている(特許文献1参照)。
【0008】
【特許文献1】
特許第3267459号公報(特許請求の範囲、段落0049)
【0009】
【発明が解決しようとする課題】
しかし、上記した従来の廃水の微生物分解処理方法は、汚水処理槽の中で所定濃度のアルミニウムイオンを混ぜ、次の処理槽でゼオライトなどの鉱物片を混ぜ、さらにアルミニウムイオン濃度の検出を行なって処理能力の調整を行なう必要があり、汚水処理槽の稼動状態を詳細に管理するための手間がかかり、特に自動的にアルミニウムイオンを適量だけ連続的に供給したり、微生物を集中的に管理するために小規模な装置で稼動することは困難であった。
【0010】
一般的な活性汚泥法などの廃水の微生物分解処理方法では、定期的に所定量の微生物基材を供給したり、水の濃度調整などの管理に煩雑な手間がかかるという問題点がある。
【0011】
また、従来のアルミニウムイオンを供給する微生物分解処理方法では、汚水溜槽に至る嫌気的状態の水路から悪臭が発生したり、水路中に悪臭や廃油などの堆積物が生じやすいため、充分に清潔な状態で汚水処理できないという問題もある。
【0012】
そこで、この発明の課題は、上記した問題点を解決して、汚水溜槽に至る嫌気的状態におかれた汚水路から悪臭を簡便に消去でき、汚水路中に悪臭や廃油などの堆積物が生じることなく、充分に清潔な状態で汚水処理できる廃水の微生物分解処理方法とすることであり、またそのような方法に用いる比較的簡単な構造で小型化可能な装置とすることである。
【0013】
また、この発明の他の課題としては、廃水の微生物分解処理方法において、廃水中に所定量の微生物基材を供給して濃度調整する工程が簡単であり、微生物処理の管理に手間がかからず、低コストで稼動できる廃水の微生物分解処理方法とし、またその方法に用いる装置とすることである。
【0014】
【課題を解決するための手段】
上記の課題を解決するために、この発明においては、水酸化アルミニウムを含有する鉱物質粒子を隣り合う粒子同士が接触するように容器内に多数収容し、これら鉱物質粒子を物理的に振動させて鉱物質粒子同士を摩擦させ、生じた摩耗粉を前記容器内から廃水中に排出し、この廃水中に供給した前記摩耗粉から水中にアルミニウムイオンを供給すると共に前記摩耗粉を担体として有機物資化性微生物を高密度に増殖させることからなる廃水の微生物分解処理方法としたのである。
【0015】
上記したように構成されるこの発明の廃水の微生物分解処理方法は、多数の鉱物質粒子を隣り合う粒子同士が接触するように容器内に収容し、そしてこれらのの鉱物質粒子を周知の手法で物理的に振動させれば、粒子表面同士が擦れあって表面が摩耗し、その摩耗粉が生成する。
【0016】
生成した摩耗粉は、水酸化アルミニウムを含有する鉱物質であり、容器内に供給される水にアルミナ水和物またはその塩(アルミン酸塩など)として分散し、または一部が溶解して、水中にアルミニウムイオンを供給する。
【0017】
アルミニウムイオンは、有機成分を含有する水の分解過程で悪臭を発する微生物群などの増殖を抑制し、かつ悪臭を吸着するフェノール類を形成して悪臭成分を分解する微生物群を選択的に増殖することが判明しており、このように有用なアルミニウムイオンを水中に供給する非水溶性の鉱物質は、油脂その他の有機物資化性の多数の微生物が着生可能な担体となり、これを核として微生物のコロニーが形成され、巨大なバイオフィルムが作られる。
【0018】
水酸化アルミニウムを含有する鉱物質の摩耗粉を担体として増殖する微生物群としては、油脂その他の有機物資化性の微生物が周知であり、特に油脂資化性微生物としては、例えばアクロモバクター キシロゾキシダン(Achromobacter xylosoxidans)などが優占しやすい菌種の代表例として挙げられる。
【0019】
このようにして容器内の水に鉱物質粒子を物理的に振動させて鉱物質粒子同士の摩耗によって微生物担体を供給するとき、物理的振動の強度と水の供給量を調節するだけで一定の供給速度になり、単位時間当たり所要量の微生物担体を簡便に廃水中に供給できる。
【0020】
鉱物質の摩耗粉が供給された廃水は、油脂を含む有機物分解能の高い微生物が多数増殖しやすい環境となり、例えば廃水の配管内やグリーストラップなどの滞留しやすい箇所において油脂の微生物分解が活発に行なわれるようになる。
【0021】
そのため、汚水路中に悪臭や廃油などの堆積物が生じることなく、充分に清潔な衛生環境を保ちながら汚水処理できる廃水の微生物分解処理方法となる。
【0022】
また、この発明では、上記した廃水の微生物分解処理方法において、容器内に水を供給しながら鉱物質粒子を物理的に振動させ、生じた摩耗粉を水と共に容器外に取り出して被処理廃水中に混入する処理方法を採用することが好ましい。
【0023】
容器内に水を供給しながら振動させると、生じた摩耗粉が生成直後に水に混ざるから、均一に分散または溶解し、一定の濃度で容器外に取り出し易い状態になる。
【0024】
また、上記の課題を解決するために、採用できる廃水処理剤の混入装置としては、水の供給路が接続された容器内の水面下に水酸化アルミニウムを含有する鉱物質粒子の堆積層を設け、この堆積層の下方に散気部材を設けてこの散気部材に圧縮空気の供給路を接続し、前記散気部材から水中に放出される気泡流で鉱物質粒子を振動させた際、鉱物質粒子同士の摩擦で生じた粉状処理剤の分散した水を容器外の被処理水に供給する処理剤混入路を設けた廃水処理剤の混入装置とする構成を採用することができる。
【0025】
上記した構成の混入装置は、散気部材に圧縮空気を供給すると、水酸化アルミニウムを含有する鉱物質粒子の堆積層を下方から上方に通り抜けて気泡流が生じ、これにより鉱物質粒子が容器内の水中で振動する。
【0026】
これにより、鉱物質粒子同士の摩擦で生じた粉状処理剤の均質に分散した水が生成され、この水を処理剤混入路から容器外の被処理水に供給することにより、被処理水を、油脂その他の有機物資化性の微生物が選択増殖しやすい環境にすることができる。
【0027】
【発明の実施の形態】
この発明の実施形態である廃水の微生物分解処理方法は、水酸化アルミニウムを含有する粘土を焼成した所定粒径の鉱物質粒子を用意し、隣り合う粒子同士が接触するように容器内に多数収容し、これら鉱物質粒子を曝気に伴って発生する気泡流などで物理的に振動させて鉱物質粒子同士を摩擦させ、生じた摩耗粉を前記容器内から廃水中に排出し、この廃水中には前記摩耗粉からアルミニウムイオンを供給すると共に、前記摩耗粉を担体として油脂その他の有機物資化性の微生物を増殖させる廃水の微生物分解処理方法としたものである。
【0028】
この発明に用いる鉱物質粒子は、たとえば水酸化アルミニウムを含有する粘土を焼成した所定粒径のものを採用できるが、例えば泥岩、沸石、軽石などの粘土鉱物が挙げられる。特に、ケイ酸(例えば45%程度)と腐植酸を主要成分としてアルミニウム化合物を微量に含有する粘土系鉱物(pH2〜3程度)からなる粒子が挙げられる。粒子の大きさとしては、例えば最大直径が10〜13mmのものを採用すると、水中でよく振動するなどの点で好ましい。
【0029】
このような鉱物質粒子は、天然に産出される粘土鉱物のほか、粉状または砂状の粘土系鉱物を圧縮成型し、これを340〜380℃、好ましくは340〜350℃程度で焼成または焼結したセラミック質であってもよい。特に、軽石などのような多孔質の鉱物質粒子とすることが摩耗粉を効率よく生成するので、好ましいものである。
【0030】
水中に供給するアルミニウムイオン濃度は、0.1〜0.5mMとなるように鉱物質粒子の組成を調整することが好ましく、より好ましくは0.1〜0.2mMである。なぜなら、0.1mM未満のアルミニウムイオン濃度では、腐敗臭を抑制する微生物の増殖を選択的に高めることが困難であり、顕微鏡下では水酸化アルミニウムに微生物が包まれた微小粒子が見られるが、水中に沈降するまでには凝集せず、物理的に微生物を分離困難である。また、0.5mMを越えて高濃度のアルミニウムイオンを供給しても、腐敗臭を抑制する微生物の増殖の速度は変わらず、かえって鉱物質粒子の無用な摩耗量を増大させる結果となり、好ましくない。
【0031】
すなわち、水中に鉱物質粒子の摩耗粉と所定濃度のアルミニウムイオンが同時に供給されると、摩耗粉を油脂資化性微生物が取り囲むように増殖し、その外側を水酸化アルミニウムの膜が覆う粒子が形成され、このような粒子は、廃水中に沈降して分離して処理しやすいものになる。
【0032】
鉱物質粒子を物理的に振動させるには、気泡を接触通過させて振動させる手段のほか、鉱物質粒子を収容した籠状容器などをモータや電磁石を用いて電気的、磁気的に振動させたり、音波や超音波などを利用して振動させることもできる。
【0033】
この発明の実施形態の廃水処理剤の混入装置の実施形態を、以下に添付図面を参照しながら説明する。
【0034】
図1および図2に示すように、実施形態は、水道配管1を接続したステンレス鋼製の容器2内の基準水面下に水酸化アルミニウムを含有する直径10mm程度の鉱物質粒子(腐植酸とケイ酸を主成分とし、水酸化アルミニウムを2%含有する泥岩)3の堆積層を設け、この堆積層の下方にパンチングメタルからなる透水性の仕切り台4を介して散気部材5を設け、これにエアポンプ12から圧送される圧縮空気の供給管14を接続し、管状の散気部材5から水中に放出される気泡流で鉱物質粒子3を振動させた際、鉱物質粒子3同士の摩擦で生じた粉状処理剤の分散した水を容器外の被処理水に供給する処理剤混入管路6を接続して設けた廃水処理剤の混入装置である。
【0035】
容器2には、過剰な水の供給でオーバーフローが起こらないように、フロート(浮子)7付きの水位調節装置を設け、水道配管1を電磁弁8で開栓するだけで、常時定量の水位に保てるようにしている。また、水道の水圧が高すぎて基準水位を超えた場合にもオーバーフローが起こらないように、基準水位の高さに排水口9を設けている。
【0036】
また、仕切り台4に重ねて粉状処理剤の分散した水を漉しとって排出しやすくするようにパンチングメタル製の仕切り壁10を設け、処理剤混入管路6からの排水が確実にできるようにしている。
【0037】
また、図2に示すように、電磁弁8、11およびエアポンプ12を電気的に制御するためのタイマー13を設け、この操作および設定によって自動的に給排水を行えるようにしている。
【0038】
上記した廃水処理剤の混入装置は、容器内に水を供給しながらエアポンプ12を駆動すると、曝気が起こると共に鉱物質粒子3は上昇する空気泡に接して振動し、このとき生じた摩耗粉が生成直後に一定の濃度で水に混ざり、仕切り壁4を通過して、処理剤混入管路6から排水できるものである。
【0039】
【実施例】
図1および図2に示した50リットル容器内の仕切り台上に5kgの鉱物質粒子(腐植酸とケイ酸を主成分とし、水酸化アルミニウムを2%含有する直径10mmの泥岩粒子)5kgをほぼ同じ厚みの層状に収容し、エアポンプから散気部材に水圧以上の圧縮空気を2リットル/分程度で供給し、かつ鉱物質粒子一日当たり600リットルの水道水を供給して同量の粉状処理剤分散水を製造し、これを居酒屋厨房からの廃水に37日間連続して混入し、さらにグリーストラップ(容量200リットル)を通過させて排水するという微生物分解処理を試験的に行なった。30日間の排水量を18000リットルとした場合の摩耗した鉱物質粒子の量は、計量の結果41.57gであった。このときのグリーストラップ内の排水の水質検査(pH、生物学的酸素要求量(BOD)、浮遊物質量(SS)、ノルマルヘキサンを抽出物質量)の結果を表1に示した。
【0040】
【表1】

Figure 2004351269
【0041】
表1の結果からも明らかなように、処理後12日および37日後のBOD、SS量、ノルマルヘキサン抽出物質量は、顕著に減少しており、目視検査の結果も油脂分の堆積や滞留はなくなり、排水の透明度および臭気も顕著に改善されていた。
【0042】
【発明の効果】
この発明は、以上説明したように、水酸化アルミニウムを含有する鉱物質粒子を容器内に多数収容し、これら鉱物質粒子を振動させて摩耗粉を廃水中に排出して、廃水中の油脂資化性微生物を増殖させたので、汚水溜槽に至る嫌気的状態におかれた汚水路から悪臭を簡便にかつ確実に消去でき、そのような汚水路中に悪臭や廃油などの堆積物が生じることなく、清潔な状態で汚水処理できる廃水の微生物分解処理方法となる利点がある。
【0043】
また、この装置に係る発明は、容器内の水面下に水酸化アルミニウムを含有する鉱物質粒子の堆積層を設け、この堆積層の下方に配置した散気部材から水中に放出される気泡流で鉱物質粒子を振動させ、生じた粉状処理剤の分散した水を容器外の被処理水に供給する装置としたので、微生物を増殖するための処理槽を装置内に組み込む必要がなくなり、比較的簡単な装置を使用して確実に廃水中に所定量の微生物基材を供給でき、微生物処理の管理に手間が掛からず、低コストで稼動できる廃水の微生物分解処理装置となる利点がある。
【図面の簡単な説明】
【図1】処理装置の実施形態を容器を取り除いて示す斜視図
【図2】処理装置の実施形態の管路の配置状態を示す平面図
【符号の説明】
1 水道配管
2 容器
3 鉱物質粒子
4 仕切り台
5 散気部材
6 処理剤混入管路
7 フロート
8、11 電磁弁
9 排水口
10 仕切り壁
12 エアポンプ
13 タイマー
14 供給管[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a microbial decomposition treatment method for wastewater that purifies domestic wastewater, industrial wastewater, and other wastewater containing oils and fats by microbial decomposition, and an apparatus for mixing a wastewater treatment agent used in the method.
[0002]
[Prior art]
Generally, various organic substances such as fats and oils, proteins, starch, and surfactants are mixed in wastewater such as domestic wastewater and industrial wastewater, and it is necessary to purify and return the same to the natural world in order to maintain human living environment. It is considered important.
[0003]
Normally, to treat domestic wastewater or industrial wastewater containing oils and fats, first install a sewage tank or grease trap near the source facility, and then filter, settle, A facility for physicochemical purification treatment is provided, and a biological purification treatment facility is provided.
[0004]
Sewage tanks and grease traps installed near the source of wastewater prevent solids and oils and fats from flowing into the sewage pipes, and perform a certain degree of deodorizing function. If the treatment capacity is reduced, and if left in an anaerobic state, the retained matter is altered, and hydrogen sulfide, amine, ammonia and the like are chemically reacted to generate a foul-smelling sulfur gas.
[0005]
In order to prevent such a situation, it is usually necessary to float or sediment the accumulated oils and fats in the upper or lower layer of the sewage tank or grease trap, separate them, and periodically take them out of the tank for processing. Has been adopted.
[0006]
In addition, as a treatment method using microorganisms suitable for purifying wastewater, an aerobic microorganism or an anaerobic microorganism that decomposes organic substances that cause odor or pollution is supported on a porous culture substrate, and the culture of these microorganisms is performed. The wastewater is subjected to contact filtration in a state in which useful microorganisms have proliferated on the base material to purify the wastewater.
[0007]
For example, to treat wastewater containing fats and oils such as animal fats and fats by microbial decomposition, a method of adding low-concentration aluminum ions and mineral fragments such as zeolite to prevent the generation of putrefaction odor and performing a biodegradation treatment is known. (See Patent Document 1).
[0008]
[Patent Document 1]
Japanese Patent No. 3267449 (Claims, paragraph 0049)
[0009]
[Problems to be solved by the invention]
However, the above-mentioned conventional wastewater microbial decomposition treatment method involves mixing a predetermined concentration of aluminum ions in a sewage treatment tank, mixing mineral fragments such as zeolite in the next treatment tank, and detecting the aluminum ion concentration. It is necessary to adjust the processing capacity, and it takes time and effort to control the operation state of the sewage treatment tank in detail. Especially, it automatically and continuously supplies an appropriate amount of aluminum ions and centrally controls microorganisms. Therefore, it was difficult to operate on a small-scale device.
[0010]
In a general method for treating microorganisms in wastewater, such as a general activated sludge method, there is a problem in that a predetermined amount of a microbial base material is periodically supplied, and management such as adjustment of the concentration of water requires troublesome labor.
[0011]
In addition, in the conventional microbial decomposition treatment method for supplying aluminum ions, a bad odor is generated from an anaerobic water channel leading to a sewage tank, or a deposit such as a bad odor or waste oil is easily generated in the water channel. There is also a problem that sewage treatment cannot be performed in a state.
[0012]
Therefore, an object of the present invention is to solve the above-mentioned problems, and to easily eliminate odors from an anaerobic sewage channel leading to a sewage tank, and deposits such as odors and waste oil in the sewage channel. The present invention is to provide a method of treating microorganisms for wastewater that can be treated in a sufficiently clean state without causing wastewater, and a device that can be miniaturized with a relatively simple structure used in such a method.
[0013]
Another object of the present invention is that, in the method for decomposing microorganisms in wastewater, a step of supplying a predetermined amount of a microbial base material to the wastewater and adjusting the concentration is simple, and the management of microbial treatment is troublesome. Instead, it is a method of treating microorganisms for wastewater that can be operated at low cost, and an apparatus used for the method.
[0014]
[Means for Solving the Problems]
In order to solve the above problems, in the present invention, a large number of mineral particles containing aluminum hydroxide are accommodated in a container so that adjacent particles come into contact with each other, and these mineral particles are physically vibrated. The abrasion powder generated is discharged into the waste water from the container, aluminum ions are supplied into the water from the abrasion powder supplied into the waste water, and the organic material is used as a carrier using the abrasion powder as a carrier. Thus, a method of microbial treatment of wastewater, which consists of multiplying plasticizing microorganisms at high density, was adopted.
[0015]
The microbial decomposition treatment method of the wastewater of the present invention configured as described above accommodates a large number of mineral particles in a container such that adjacent particles come into contact with each other, and uses these well-known methods for the mineral particles. If the particles are physically vibrated in the above, the surfaces of the particles rub against each other and the surfaces are worn, and the wear powder is generated.
[0016]
The generated wear powder is a mineral substance containing aluminum hydroxide, and is dispersed or partially dissolved as alumina hydrate or a salt thereof (aluminate) in water supplied to the container. Supply aluminum ions into water.
[0017]
Aluminum ions inhibit the growth of microorganisms that emit malodor in the process of decomposing water containing organic components, and selectively grow microorganisms that decompose malodor components by forming phenols that adsorb malodor. It has been found that water-insoluble minerals that supply such useful aluminum ions to water become carriers on which a number of microorganisms capable of assimilating organic substances such as oils and fats can grow, and this is used as a core. Microbial colonies form, creating huge biofilms.
[0018]
As a group of microorganisms that proliferate using abrasion powder of a mineral substance containing aluminum hydroxide as a carrier, oil-and-fat and other organic assimilating microorganisms are well known. In particular, as the oil-and-fat assimilating microorganism, for example, Achromobacter xylosozidan ( Achromobacter xylosoxidans) and the like are typical examples of bacterial species that are likely to be dominant.
[0019]
In this way, when the mineral particles are physically vibrated in the water in the container and the microbial carrier is supplied by abrasion of the mineral particles, a constant level is obtained only by adjusting the intensity of the physical vibration and the amount of supplied water. At the feed rate, the required amount of the microbial carrier per unit time can be easily supplied to the wastewater.
[0020]
Wastewater supplied with abrasion powder of mineral matter is an environment where many microorganisms with high organic matter resolution including oils and fats are easy to proliferate.For example, microbial decomposition of oils and fats is active in places where wastewater pipes and grease traps tend to stay. Will be performed.
[0021]
Therefore, there is provided a microbial decomposition treatment method for wastewater that can perform sewage treatment while maintaining a sufficiently clean sanitary environment without generating a deposit such as a bad smell or waste oil in a sewage channel.
[0022]
Further, in the present invention, in the method for microbial decomposition treatment of wastewater described above, the mineral particles are physically vibrated while supplying water into the container, and the generated abrasion powder is taken out of the container together with the water, and the wastewater to be treated is discharged. It is preferable to adopt a processing method that mixes with the water.
[0023]
When vibration is caused while supplying water into the container, the generated abrasion powder mixes with the water immediately after generation, so that the abrasion powder is uniformly dispersed or dissolved, and is easily taken out of the container at a certain concentration.
[0024]
Further, in order to solve the above problems, as a mixing device of a wastewater treatment agent that can be adopted, a deposition layer of mineral particles containing aluminum hydroxide is provided below the water surface in a vessel to which a water supply path is connected. When a diffuser member is provided below the sedimentary layer, a supply path of compressed air is connected to the diffuser member, and when the mineral particles are vibrated by a bubble flow released from the diffuser member into water, the mineral It is possible to adopt a configuration in which a wastewater treatment agent mixing device provided with a treatment agent mixing passage for supplying water in which the powdery processing agent generated by friction between the porous particles is dispersed to the water to be treated outside the container.
[0025]
In the mixing device having the above-described configuration, when compressed air is supplied to the air diffuser, a bubble flow is generated from below through the deposition layer of the mineral particles containing aluminum hydroxide, thereby generating a bubble flow. Vibrates in water.
[0026]
As a result, water in which the powdery processing agent generated by friction between the mineral particles is homogeneously dispersed is generated, and this water is supplied to the water to be treated outside the vessel from the treatment agent mixing passage, whereby the water to be treated is removed. In addition, an environment in which microorganisms capable of assimilating fats and oils and other organic substances can be selectively propagated can be provided.
[0027]
BEST MODE FOR CARRYING OUT THE INVENTION
In the method for microbial decomposition of wastewater according to an embodiment of the present invention, mineral particles having a predetermined particle size obtained by calcining clay containing aluminum hydroxide are prepared, and a large number of mineral particles are accommodated in a container so that adjacent particles come into contact with each other. Then, these mineral particles are physically vibrated by a bubble flow or the like generated by aeration to cause friction between the mineral particles, and the generated abrasion powder is discharged from the container into wastewater, and into the wastewater. The invention provides a method for microbial decomposition of wastewater in which aluminum ions are supplied from the abrasion powder and the abrasion powder is used as a carrier to proliferate microorganisms capable of assimilating oils and other organic substances.
[0028]
As the mineral particles used in the present invention, for example, those having a predetermined particle size obtained by calcining a clay containing aluminum hydroxide can be used, and examples thereof include clay minerals such as mudstone, zeolite and pumice. In particular, particles made of clay minerals (about pH 2 to 3) containing silicic acid (for example, about 45%) and humic acid as main components and a trace amount of an aluminum compound are exemplified. As the size of the particles, for example, it is preferable to employ a particle having a maximum diameter of 10 to 13 mm in terms of vibrating well in water.
[0029]
Such mineral particles are obtained by compressing and molding powdery or sandy clay minerals in addition to naturally occurring clay minerals, and firing or firing at 340 to 380 ° C, preferably about 340 to 350 ° C. It may be a tied ceramic material. In particular, it is preferable to use porous mineral particles such as pumice or the like since the wear powder is efficiently generated.
[0030]
The composition of the mineral particles is preferably adjusted so that the concentration of aluminum ions supplied to the water is 0.1 to 0.5 mM, and more preferably 0.1 to 0.2 mM. Because, at an aluminum ion concentration of less than 0.1 mM, it is difficult to selectively enhance the growth of microorganisms that suppress putrefaction odor, and microscopic particles in which microorganisms are wrapped in aluminum hydroxide are seen under a microscope. It does not aggregate before sedimentation in water, and it is physically difficult to separate microorganisms. In addition, even if a high concentration of aluminum ions is supplied in excess of 0.5 mM, the growth rate of microorganisms that suppress putrefaction odor does not change, but the amount of unnecessary wear of the mineral particles is increased, which is not preferable. .
[0031]
That is, when the wear powder of the mineral particles and aluminum ions of a predetermined concentration are simultaneously supplied to the water, the wear powder grows so as to be surrounded by the fat-and-acid assimilating microorganisms, and the particles covered with the aluminum hydroxide film on the outer side are formed. Once formed, such particles settle in the wastewater and become separated and easy to treat.
[0032]
To physically vibrate the mineral particles, in addition to the means for causing bubbles to come into contact with and vibrate, the basket-shaped container containing the mineral particles can be electrically and magnetically vibrated using a motor or electromagnet. Vibration can also be performed using sound waves or ultrasonic waves.
[0033]
An embodiment of an apparatus for mixing a wastewater treatment agent according to an embodiment of the present invention will be described below with reference to the accompanying drawings.
[0034]
As shown in FIG. 1 and FIG. 2, in the embodiment, mineral particles having a diameter of about 10 mm (humic acid and silica) containing aluminum hydroxide are provided below a reference water level in a stainless steel container 2 to which a water supply pipe 1 is connected. A mudstone (3) containing acid as a main component and containing 2% of aluminum hydroxide) is provided, and a diffuser member (5) is provided below the sedimentary layer through a permeable partition (4) made of punched metal. Is connected to a supply pipe 14 of compressed air pumped from an air pump 12, and when the mineral particles 3 are vibrated by a bubble flow released from the tubular air diffusion member 5 into water, the friction between the mineral particles 3 causes This is a wastewater treatment agent mixing device provided by connecting a treatment agent mixing pipe 6 for supplying the water in which the generated powdery processing agent is dispersed to the water to be treated outside the container.
[0035]
The container 2 is provided with a water level adjusting device with a float 7 so as not to cause overflow due to excessive water supply. I can keep it. In addition, a drain port 9 is provided at the height of the reference water level so that overflow does not occur even when the water pressure of the tap water is too high and exceeds the reference water level.
[0036]
Further, a partition wall 10 made of a punching metal is provided so as to strain the water in which the powdery processing agent is dispersed on the partitioning table 4 so as to be easily drained, so that the drainage from the processing agent mixing pipe 6 can be surely performed. I have to.
[0037]
Further, as shown in FIG. 2, a timer 13 for electrically controlling the solenoid valves 8, 11 and the air pump 12 is provided, and the operation and the setting make it possible to automatically supply and drain water.
[0038]
When the air pump 12 is driven while supplying water into the container, the mixing device of the wastewater treatment agent described above causes aeration and causes the mineral particles 3 to vibrate in contact with the rising air bubbles. Immediately after the production, it is mixed with water at a certain concentration, passes through the partition wall 4, and can be drained from the treatment agent mixing pipe 6.
[0039]
【Example】
5 kg of mineral particles (10 mm diameter mudstone particles containing humic acid and silicic acid as main components and containing 2% of aluminum hydroxide) were placed on the partition in the 50-liter container shown in FIGS. 1 and 2. The same amount of powdery treatment is accommodated in layers with the same thickness, compressed air above the water pressure is supplied from the air pump to the diffusing member at about 2 liters / minute, and tap water of 600 liters per day is supplied to the mineral particles. An agent-dispersed water was produced, mixed with wastewater from a izakaya kitchen for 37 consecutive days, and further subjected to a biodegradation treatment by passing through a grease trap (capacity: 200 liters) and draining. The amount of the abraded mineral particles when the amount of drainage for 30 days was 18,000 liters was 41.57 g as a result of measurement. Table 1 shows the results of the water quality tests (pH, biological oxygen demand (BOD), suspended solids (SS), and extracted amount of normal hexane) of the wastewater in the grease trap at this time.
[0040]
[Table 1]
Figure 2004351269
[0041]
As is clear from the results in Table 1, the BOD, SS content, and normal hexane extractable material content on the 12th and 37th days after the treatment are remarkably reduced. The clarity and odor of the wastewater were significantly improved.
[0042]
【The invention's effect】
As described above, the present invention accommodates a large number of mineral particles containing aluminum hydroxide in a container, vibrates the mineral particles, discharges abrasion powder into wastewater, and removes fats and oils in wastewater. The odorous odors from the anaerobic sewage channel leading to the sewage basin can be easily and reliably eliminated because of the growth of the activating microorganisms. Therefore, there is an advantage that the method can be used as a method for microbial decomposition treatment of wastewater that can be treated in a clean state.
[0043]
In addition, the invention according to this device provides a deposit layer of mineral particles containing aluminum hydroxide below the surface of the water in the container, and a bubble flow released into the water from a diffuser member disposed below the deposit layer. The system is designed to vibrate mineral particles and supply the water in which the generated powdery processing agent is dispersed to the water to be treated outside the container.Therefore, there is no need to incorporate a treatment tank for growing microorganisms in the device. It is possible to supply a predetermined amount of microbial base material into wastewater reliably using a simple and simple apparatus, and there is an advantage that a microbial decomposition treatment apparatus of wastewater which can be operated at low cost without troublesome management of microbial treatment.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of a processing apparatus with a container removed. FIG. 2 is a plan view showing an arrangement state of pipes in an embodiment of the processing apparatus.
DESCRIPTION OF SYMBOLS 1 Water supply pipe 2 Container 3 Mineral particle 4 Partitioning plate 5 Air diffusing member 6 Treatment agent mixing conduit 7 Float 8, 11 Solenoid valve 9 Drain port 10 Partition wall 12 Air pump 13 Timer 14 Supply pipe

Claims (3)

水酸化アルミニウムを含有する鉱物質粒子を隣り合う粒子同士が接触するように容器内に多数収容し、これら鉱物質粒子を物理的に振動させて鉱物質粒子同士を摩擦させ、生じた摩耗粉を前記容器内から廃水中に排出し、この廃水中に供給した前記摩耗粉から水中にアルミニウムイオンを供給すると共に前記摩耗粉を担体として有機物資化性微生物を増殖させることからなる廃水の微生物分解処理方法。A large number of mineral particles containing aluminum hydroxide are housed in a container so that adjacent particles come into contact with each other, and the mineral particles are physically vibrated to cause friction between the mineral particles. A microbial decomposition treatment of wastewater comprising discharging aluminum ions into the water from the abrasion powder supplied into the wastewater and supplying aluminum ions into the water from the abrasion powder supplied to the wastewater, and using the abrasion powder as a carrier to grow organic assimilating microorganisms. Method. 容器内に水を供給しながら鉱物質粒子を振動させ、生じた摩耗粉を水と共に容器外に取り出して被処理廃水中に混入する請求項1に記載の廃水の微生物分解処理方法。The method of claim 1, wherein the mineral particles are vibrated while supplying water into the container, and the generated abrasion powder is taken out of the container together with the water and mixed into the wastewater to be treated. 水の供給路が接続された容器内の水面下に水酸化アルミニウムを含有する鉱物質粒子の堆積層を設け、この堆積層の下方に散気部材を設けてこの散気部材に圧縮空気の供給路を接続し、前記散気部材から水中に放出される気泡流で鉱物質粒子を振動させた際、鉱物質粒子同士の摩擦で生じた粉状処理剤の分散した水を容器外の被処理水に供給する処理剤混入路を設けた廃水処理剤の混入装置。A deposition layer of aluminum hydroxide-containing mineral particles is provided below the surface of the water in the vessel connected to the water supply path, and a diffusing member is provided below the deposition layer to supply compressed air to the diffusing member. When the mineral particles are vibrated by a bubble flow released into the water from the air diffusing member, the water in which the powdery processing agent generated by the friction between the mineral particles is dispersed is treated outside the container. A wastewater treatment agent mixing device provided with a treatment agent mixing passage for supplying water.
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