JP3851399B2 - Rotating disc type wastewater treatment equipment - Google Patents

Rotating disc type wastewater treatment equipment Download PDF

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Publication number
JP3851399B2
JP3851399B2 JP1868397A JP1868397A JP3851399B2 JP 3851399 B2 JP3851399 B2 JP 3851399B2 JP 1868397 A JP1868397 A JP 1868397A JP 1868397 A JP1868397 A JP 1868397A JP 3851399 B2 JP3851399 B2 JP 3851399B2
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Prior art keywords
rotating disk
tank
waste water
treatment apparatus
wastewater treatment
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JP1868397A
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JPH10216759A (en
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宏之 荒木
章彦 岡川
博 加藤
哲夫 杉原
文治 福田
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Sekisui Aqua Systems Co Ltd
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Sekisui Aqua Systems Co Ltd
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    • 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

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Description

【0001】
【発明の属する技術分野】
本発明は、回転円板式廃水処理装置に関する。
【0002】
【従来の技術】
従来、工業用水や家庭用水の廃水の富栄養化の生じる原因物質である窒素と燐を除去することは廃水処理上重要な課題となっている。
特に生物膜内では好気性領域と嫌気性領域が共存し、有機物酸化、硝化、及び脱窒反応が同時に進行し易いため、一つの生物膜反応槽においても有機物と窒素の同時除去が有効に行われることが知られている。
【0003】
しかるに、廃水の酸化、硝化、は酸素の存在下で行われる好気性処理で効果的に進行し、脱窒は酸素の供給が遮断された嫌気性処理で効果的に進行する。従って、好気性処理と嫌気性処理の両方を同時に行うことによって、効果的な廃水処理を行うことができる。
【0004】
このように、好気性処理と嫌気性処理の両方を行うことのできる廃水処理の工業化された例としては、廃水を回転円板法により生物学的に酸化、硝化、脱窒、再ばっ気を行って浄化排水する、所謂回転円板式廃水処理装置が知られている。
【0005】
この回転円板法を利用した回転円板式廃水処理装置は、その処理効果を上げるため複数の回転円板が隙間をあけて並設された回転円板ブロックを複数形成し、これらの回転円板ブロックを軸体に串刺し状に軸着して、処理槽内の区画内にそれぞれに配設した上、処理槽内の廃水に半没状態または全没状態で浸漬し、回転駆動させることにより廃水を連続的に浄化排水するものであって、具体的な例としては、第15回下水道研究発表会(昭和53年開催)における発表文献(6−43)「回転円板を用いた単一槽内における下水の2次処理及び脱窒」に記載されたものが挙げられる。
【0006】
上記文献記載の回転円板式廃水処理装置は、処理槽が左右に第1ステージ用と第2ステージ用の2槽からなり、各槽(即ち各ステージ)には上部に廃水に半没状態に浸漬した好気性回転円板、下部に廃水に全没状態に浸漬した嫌気性回転円板が配設され、好気性回転円板と嫌気性回転円板の中間にスリットを設けた隔離板、第1ステージ用処理槽の下部に廃水の流入口、第2ステージ用処理槽の上部に廃水の流出口が配設されているものである。
【0007】
廃水は第1ステージ用処理槽の下部より流入して、第2ステージ用処理槽の上部より流出するが、この間に各ステージでは上部の好気性回転円板によってばっ気が行われ、酸化によるBOD除去、硝化、再ばっ気が行われ、下部の嫌気性回転円板では脱窒が行われる。
【0008】
【発明が解決しようとする課題】
しかるに、上記文献記載の回転円板式廃水処理装置は、好気性回転円板と嫌気性回転円板が処理槽の上下に別々の駆動軸に軸着されて配設されているために、駆動装置が複雑となり、また、設備全体が大がかりとなる上、設備コストやランニングコストが割高になるなどの問題がある。
【0009】
本発明は上記のような問題点に着目してなされたものであり、その目的とするところはこれらの問題点を解消し、好気性処理と嫌気性処理を同時に行うことにより、廃水処理を効果的・効率的に行うことができ、しかも一槽一軸式のコンパクトで簡単な構造を有し、設備コストやランニングコストが低廉な回転円板式廃水処理装置を提供するものである。
【0010】
【課題を解決するための手段】
請求項1記載の本発明の回転円板式廃水処理装置においては、複数の回転円板が並設されて構成された回転円板ブロックが、適宜間隔をあけて軸体に回転可能に装着されて回転円板体となされ、この回転円板体が処理槽の槽本体内にほぼ水平方向に装備されてなる回転円板式廃水処理装置であって、上記回転円板体を構成する回転円板ブロックの内、少なくとも1つがその他の回転円板ブロックの外径より小径の回転円板ブロックとなされ、この小径の回転円板ブロックが処理槽内に供給された廃水に没した状態で、その他の回転円板ブロックがその上方を廃水の水面上に露出した状態で浸漬された上、回転駆動されて廃水の浄化処理が連続的に行われることを特徴とする。
【0011】
請求項2記載の本発明の回転円板式廃水処理装置においては、請求項1記載の回転円板式廃水処理装置の回転円板体の小径の回転円板ブロックの上面に、その上方を覆うカバーが設けられていることを特徴とする。
【0012】
【作用】
請求項1記載の本発明の回転円板式廃水処理装置においては、回転円板体を構成する回転円板ブロックの内、少なくとも1つがその他の回転円板ブロックの外径より小径の回転円板ブロックとなされ、この小径の回転円板ブロックが処理槽内に供給された廃水に没した状態で、その他の回転円板ブロックがその上方を廃水の水面上に露出した状態で浸漬された上、回転駆動されて廃水の浄化処理が連続的に行われる。
【0013】
従って、回転円板体のその他の回転円板ブロックが廃水に半没し、上方が空気に曝された状態で回転駆動されるので、好気性の酸化、硝化、及び再ばっ気処理が効果的且つ効率的に行われる。
【0014】
又、本発明の回転円板式廃水処理装置は、一槽一軸式のコンパクトな回転円板式であるため構造が簡単であり、設備コストやランニングコストを低廉にすることができる。
【0015】
請求項2記載の本発明の回転円板式廃水処理装置においては、請求項1記載の回転円板式廃水処理装置の回転円板体の小径の回転円板ブロックの上面に、その上方を覆うカバーが設けられているので、上記カバーと廃水の水面との間で空気の遮断がより確実に行われる。
【0016】
又、廃水の水位が万が一基準水位より下がって、回転円板ブロックの上方が空気に曝されるようなことがあっても、回転円板ブロックの上方の周囲より空気の浸入する隙間がなく、酸素が消耗されて酸素不在の空気が存在するだけであるから、脱窒が阻害されることなく効果的に行われる。
【0017】
【発明の実施の形態】
本発明の実施の形態を図面を参照して以下に説明する。
図1は、本発明の回転円板式廃水処理装置の一例を示す断面図であり、図2は、図1の側面図である。
又、図3は図1のX−X断面図、図4は図1のY−Y断面図、及び図5は図1のZ−Z断面図である。
図1、2において、本実施例の廃水処理装置10は、処理槽11と、この処理槽11内に装備された下記詳述の回転円板体16とにより主要部が構成され、上記処理槽11は槽本体11aと、この槽本体11aの上面に着脱可能に設けられた蓋体11bとにより構成されている。
【0018】
この処理槽11には、廃水が槽本体11a内に供給される供給口12が蓋体11bの一端側の側面に設けられ、処理された浄水が排出される排水口13が、上記供給口12と反対側である槽本体11aの上端に設けられている。
【0019】
上記槽本体11a内部は、上記供給口12が設けられた側により、仕切板14a、14ab、14c、14dにより5ブロックに仕切られ、順に酸化室15a、硝化室15b、脱窒室15c、再ばっ気室15dが形成され、酸化、硝化、脱窒、再ばっ気がこの順に行われるようになっている。
又、最端に攪拌室15eが形成されている。
【0020】
上記酸化室15a、硝化室15b、脱窒室15c、再ばっ気室15dには、多数の円板が隙間をあけて並設された回転円板ブロック16a、16b、16c、16dがそれぞれに配設されて回転円板体16が構成されている。
尚、本実施例においては、回転円板ブロック16cが、その他の回転円板ブロック16a、16b、16dよりも小径となされている。
【0021】
この回転円板体16は、両端をそれぞれ槽本体11aの側面と仕切板14dに軸着されて回転可能に支持された角形の軸体18に串刺し状に装着されている。
【0022】
又、槽本体11aの他端側の攪拌室15eには、上記軸体18の延設された端部に、攪拌羽根17が装着され、廃水の攪拌が行われるようになっている。
【0023】
上記のように処理槽11内部が構成された廃水処理装置10は、処理槽11の外側端部に設けられた駆動装置19により動力が軸体18に伝達され、回転円板体16、即ち各室の回転円板ブロック16a、16B、16c、16dが同時に回転される。
【0024】
浄化するための廃水は、供給口12より槽本体11a内に水位Lまで供給された状態で、又、常にこの水位Lを保持するように連続的に供給される。
一方、逐次に処理された廃水を隣室に送り出すため、仕切板14aの下端には流路14eが、又仕切板14cの下端には流路14fがそれぞれに設けられている。
又、上記仕切板14a、仕切板14cの間の仕切板14b、14dにおいては流路を設けず、オーバーフローにより隣室に廃水が供給される。
【0025】
上記のようにして供給された廃水は、順次に酸化室15a、硝化室15b、脱窒室15c、再ばっ気室15dを通過しながら、酸化、硝化、脱窒、再ばっ気処理される。
【0026】
上記、酸化室15a、硝化室15b、及び再ばっ気室15dにおいては、廃水の好気性である酸化、硝化、再ばっ気の処理が、回転円板ブロック16a、16b、及び16dの上方を空気に曝され、廃水に半没状態で効果的に行われる。
一方、脱窒室15cにおける嫌気性である脱窒処理は、小径の回転円板ブロック16cが廃水に完全に没した状態で空気が遮断された状態で行われるので、確実で効果的な脱窒処理が可能である。
【0027】
最後に、攪拌室15eに移送された廃水は、上方の注入口11cより凝集剤を添加され、攪拌羽根17により攪拌されて脱燐処理がされ、排出口13より排出され、固液分離後放流処理される。
【0028】
図6は、図1に示す本発明の回転円板式廃水処理装置の変形例を示す断面図である。
本実施例の回転円板式廃水処理装置20は、その基本構造はほぼ同等であるので、詳細の説明は省略する。
【0029】
本実施例の廃水処理装置20は、図1に示す廃水処理装置10の脱窒室15cに配置された小径の回転円板ブロック16cの上方に、その下端が廃水の水位L下に水没する程度の深さの側壁1aが設けられたカバー1が配設された例を示すものである。
【0030】
上記、カバー1が設けられることにより、上記カバーと廃水の水面との間で空気の遮断がより確実に行われる。
又、廃水の水位が万が一基準水位より下がって、回転円板ブロック16cの上方が空気に曝されるようなことがあっても、上記説明のように回転円板ブロック16cの周囲に空気の浸入する隙間がなく、酸素が消耗されて酸素不在の空気が存在するだけであるから、脱窒が阻害されることなくより効果的に行われる。
【0031】
図7は、本発明の回転円板式廃水処理装置の他の例を示す断面図であり、図8は、図7の側面図である。
又、図9は図7のA−A断面図、図10は図7のB−B断面図、及び図11は図7のC−C断面図である。
図7、8において、本実施例の廃水処理装置30は、処理槽31に下記詳述の回転円板体36が装備されてなるものであり、上記処理槽31は槽本体31aと、この槽本体31aの上面に着脱可能に設けられた蓋体31bとにより構成されている。
【0032】
この処理槽31には、廃水が槽本体31a内に供給される供給口32が蓋体31bの一端側の側面に設けられ、処理された浄水が排出される排水口33が、上記供給口32と反対側である槽本体31aの上端に設けられている。
【0033】
上記槽本体31a内部は、上記供給口32が設けられた側により、区画板34a、34ab、34c、34dにより5ブロックに区画され、順に酸化部35a、硝化部35b、脱窒部35c、再ばっ気部35dが形成され、酸化、硝化、脱窒、再ばっ気がこの順に行われるようになっている。
又、最端に攪拌部35eが形成されている。
【0034】
上記区画板34a、34ab、34c、34dは、各部を完全に仕切るものではなく、下記詳述の回転円板体36の各回転円板部の境界に、回転円板の周囲を包囲するような形(図9の断面図参照)で設けられている。
【0035】
上記酸化部35a、硝化部35b、脱窒部35c、再ばっ気部35dには、多数の円板が隙間をあけて並設された回転円板部36a、36b、36c、36dが配設されて回転円板体36が構成されている。
【0036】
尚、本実施例においては、回転円板ブロック16cが、その他の回転円板ブロック16a、16b、16dよりも小径となされている。
【0037】
上記回転円板部36a、36b、36c、36d間には隙間が設けられておらず、角形の軸体38に串刺し状に互いに側面を当接された状態で一体に装着されている。
又、軸体38は、両端をそれぞれ槽本体31aの側面と仕切板34dに軸着されて回転可能に支持されている。
【0038】
槽本体31aの他端側の攪拌部35eには、上記軸体38の延設された端部に、攪拌羽根37が装着され、廃水の攪拌が行われるようになっている。
【0039】
上記のように処理槽31内部が構成された廃水処理装置30は、処理槽31の外側端部に設けられた駆動装置39により動力が軸体38に伝達され、各部の回転円板部36a、36B、36c、36dが同時に回転される。
【0040】
浄化するための廃水は、供給口32より槽本体31a内に水位Lまで供給された状態で、又、常にこの水位Lを保持するように連続的に供給される。
一方、逐次に処理された廃水を隣室に送り出すため、区画板34aの下端には流路34eが、又区画板34cの下端には流路34fがそれぞれに設けられている。
又、上記区画板34a、区画板34cの間の区画板34b、34dにおいては流路を設けず、オーバーフローにより隣室に廃水が供給される。
【0041】
上記のようにして供給された廃水は、順次に酸化部35a、硝化部35b、脱窒部35c、再ばっ気部35dを通過しながら、酸化、硝化、脱窒、再ばっ気処理される。
【0042】
上記、酸化部35a、硝化部35b、及び再ばっ気部35dにおいては、廃水の好気性である酸化、硝化、再ばっ気の処理が、回転円板部36a、36b、及び36dの上方を空気に曝され、廃水に半没状態で効果的に行われる。
一方、脱窒部35cにおける嫌気性である脱窒処理は、従来の廃水処理装置のように、回転円板ブロックの上方が空気に曝されて行われるのと異なり、回転円板部36cが廃水に全没状態で空気を遮断して行われるので、確実で効果的な脱窒処理が可能である。
【0043】
最後に、攪拌部35eに移送された廃水は、上方の注入口31cより凝集剤を添加され、攪拌羽根37により攪拌されて脱燐処理がされ、排出口33より排出され、固液分離後放流処理される。
【0044】
図12は、本発明の回転円板式廃水処理装置の他の変形例を示す断面図であり、図13は図12の半部断面を示す側面図である。
図12、13において、本実施例の廃水処理装置40は、処理槽41に下記詳述の回転円板体4が装備されてなるものであり、上記処理槽41は槽本体41aと、この槽本体41aの上面に着脱可能に設けられた蓋体41bとにより構成されている。
【0045】
この処理槽41には、廃水が槽本体41a内に供給される供給口42が蓋体41bの一端側の側面に設けられ、処理された浄水が排出される排水口43が、上記供給口42と反対側である槽本体41aの上端に設けられている。
【0046】
上記槽本体41a内部に装備された回転円板体4は、大きい外径の多数の円板が隙間を設けて並設された回転円板部44と、この回転円板部44より小径の回転円板部45とが交互に角形の軸体46に串差し状に配設されて構成されている。
上記軸体46は、槽本体41aの両端の側壁内側に設けられた軸受け46aにより回転可能に支持されている。
【0047】
本実施例の廃水処理装置40は、廃水の供給口42側から順次に、廃水に半没状態の上記回転円板部44により、酸化、脱硝、再ばっ気、及び脱燐処理を行い、廃水に完全に水没(全没)した状態の小径の回転円板部45により脱窒を繰り返して効果的に行おうとするものである。
【0048】
上記のように処理槽41内部が構成された廃水処理装置40には、処理槽41の外側上端に駆動装置47が設けられ、この回転動力が処理槽41内の端部において、チェン或いはベルト等を用いて軸体38に伝達され、各回転円板体4が回転駆動される。
【0049】
浄化するための廃水は、供給口42より槽本体41a内に水位Lまで供給された状態で、又、常にこの水位Lを保持するように連続的に供給される。
槽本体41a内に供給された廃水は移送されながら、酸化、脱窒、脱硝、脱窒、再ばっ気、脱窒、更に脱燐処理がこの順に行われ、浄化されて排出口43より排出される。
【0050】
上記説明のように、嫌気性である脱窒処理は、回転円板部45が廃水に全没状態で空気を遮断して行われるので、確実で効果的な脱窒処理が可能である。
【0051】
【発明の効果】
請求項1記載の本発明の回転円板式廃水処理装置においては、回転円板体を構成する回転円板ブロックの内、少なくとも1つがその他の回転円板ブロックの外径より小径の回転円板ブロックとなされ、この小径の回転円板ブロックが処理槽内に供給された廃水に没した状態で、その他の回転円板ブロックがその上方を廃水の水面に露出した状態で浸漬された上、回転駆動されて廃水の浄化処理が連続的に行われる。
【0052】
従って、回転円板体のその他の回転円板ブロックが廃水に半没し、上方が空気に曝された状態で回転駆動されるので、好気性の酸化、硝化、及び再ばっ気処理が効果的且つ効率的に行われる。
【0053】
又、本発明の回転円板式廃水処理装置は、一槽一軸式のコンパクトで簡単な構造を有し、設備コストやランニングコストを低廉に抑えることができる。
【0054】
請求項2記載の本発明の回転円板式廃水処理装置においては、請求項1記載の回転円板式廃水処理装置の回転円板体の小径の回転円板ブロックの上面に、その上方を覆うカバーが設けられているので、上記カバーと廃水の水面との間で空気の遮断がより確実に行われる。
【0055】
又、廃水の水位が万が一基準水位より下がって、回転円板ブロックの上方が空気に曝されるようなことがあっても、回転円板ブロックの上方の周囲より空気の浸入する隙間がなく、酸素が消耗されて酸素不在の空気が存在するだけであるから、脱窒が阻害されることなく効果的に行われる。
従って、回転円板式廃水処理装置として好適に用いられる。
【図面の簡単な説明】
【図1】本発明の回転円板式廃水処理装置の一例を示す断面図。
【図2】図1の側面図。
【図3】図1のX−X断面図。
【図4】図1のY−Y断面図。
【図5】図1のZ−Z断面図。
【図6】図1に示す本発明の回転円板式廃水処理装置の変形例を示す断面図。
【図7】本発明の回転円板式廃水処理装置の他の例を示す断面図。
【図8】図7の側面図。
【図9】図7のA−A断面図。
【図10】図7のB−B断面図。
【図11】図7のC−C断面図。
【図12】本発明の回転円板式廃水処理装置の更に他の例を示す断面図。
【図13】図12の半部断面を示す側面図。
【符号の説明】
1 カバー
1a 側壁
4、16、36 回転円板体
10、20、30、40 廃水処理装置
11、31、41 処理槽
11a、31a、41a 槽本体
11b、31b、41b 蓋体
12、32、42 供給口
13、33、43 排水口
14a、14b、14c、14d 仕切板
14e、14f、34e、34f 流路
15a 酸化室
15b 硝化室
15c 脱窒室
15d 再ばっ気室
15e 攪拌室
16a、16b、16c、16d 回転円板ブロック
17、37 攪拌羽根
18、38、46 軸体
19、39、47 駆動装置
34a、34b、34c、34d 区画板
35a 酸化部
35b 硝化部
35c 脱窒部
35d 再ばっ気部
35e 攪拌部
36a、36b、36c、36d、44、45 回転円板部
46a 軸受け
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rotating disk type wastewater treatment apparatus.
[0002]
[Prior art]
Conventionally, removal of nitrogen and phosphorus, which are causative substances that cause eutrophication of industrial and household wastewater, has become an important issue in wastewater treatment.
In particular, aerobic and anaerobic regions coexist in a biofilm, and organic matter oxidation, nitrification, and denitrification reactions tend to proceed simultaneously. Therefore, simultaneous removal of organic matter and nitrogen is effective even in a single biofilm reactor. It is known that
[0003]
However, the oxidation and nitrification of wastewater proceeds effectively by an aerobic treatment performed in the presence of oxygen, and denitrification proceeds effectively by an anaerobic treatment in which the supply of oxygen is blocked. Therefore, effective wastewater treatment can be performed by performing both aerobic treatment and anaerobic treatment at the same time.
[0004]
In this way, as an industrialized example of wastewater treatment that can perform both aerobic treatment and anaerobic treatment, wastewater is biologically oxidized, nitrified, denitrified and re-aerated by the rotating disk method. A so-called rotating disk type waste water treatment apparatus is known which performs purification and drainage.
[0005]
In order to improve the treatment effect, this rotating disk type wastewater treatment apparatus using the rotating disk method forms a plurality of rotating disk blocks in which a plurality of rotating disks are arranged side by side with a gap therebetween. The block is skewered on the shaft body and placed in each compartment in the treatment tank, and then immersed in the waste water in the treatment tank in a half-immersion state or a full immersion state, and driven to rotate. As a concrete example, the 15th sewer research presentation (held in 1978), a publication (6-43) “Single tank using a rotating disk” And those described in “Secondary treatment and denitrification of sewage”.
[0006]
In the rotating disk type wastewater treatment apparatus described in the above document, the treatment tank is composed of two tanks for the first stage and the second stage on the left and right, and each tank (that is, each stage) is immersed in the wastewater in a semi-submerged state at the top. A first aerobic rotating disk, an anaerobic rotating disk immersed in waste water at the bottom, and a separator provided with a slit between the aerobic rotating disk and the anaerobic rotating disk; A waste water inflow port is disposed in the lower part of the stage treatment tank, and a waste water outflow port is disposed in the upper part of the second stage treatment tank.
[0007]
Wastewater flows in from the lower part of the first stage treatment tank and flows out from the upper part of the second stage treatment tank. During this time, each stage is aerated by the upper aerobic rotating disk, and BOD due to oxidation Removal, nitrification, and re-aeration are performed, and denitrification is performed in the lower anaerobic rotating disk.
[0008]
[Problems to be solved by the invention]
However, the rotating disk type wastewater treatment apparatus described in the above document is provided with a driving device because the aerobic rotating disk and the anaerobic rotating disk are mounted on separate drive shafts at the top and bottom of the treatment tank. In addition, there is a problem that the entire facility becomes large, and the facility cost and running cost become high.
[0009]
The present invention has been made paying attention to the above-mentioned problems, and the object of the present invention is to solve these problems and to effectively treat waste water by performing aerobic treatment and anaerobic treatment simultaneously. The present invention provides a rotating disk type wastewater treatment apparatus that can be carried out efficiently and efficiently, and has a compact and simple structure of one tank and one shaft type, and has low equipment costs and running costs.
[0010]
[Means for Solving the Problems]
In the rotating disk type wastewater treatment apparatus according to the first aspect of the present invention, the rotating disk block formed by arranging a plurality of rotating disks in parallel is rotatably mounted on the shaft body at appropriate intervals. A rotating disk type wastewater treatment apparatus, which is a rotating disk body, and the rotating disk body is mounted in a substantially horizontal direction in a tank body of a processing tank, and the rotating disk block constituting the rotating disk body Of these, at least one of the rotating disk blocks is a rotating disk block having a diameter smaller than the outer diameter of the other rotating disk block, and the other rotating disk block is immersed in the waste water supplied into the treatment tank. The disk block is immersed in a state where the disk block is exposed on the water surface of the waste water, and is rotated to be continuously purified of the waste water.
[0011]
In the rotating disk type wastewater treatment apparatus according to the second aspect of the present invention, a cover that covers the upper surface of the rotating disk block having a small diameter of the rotating disk body of the rotating disk type wastewater treatment apparatus according to the first aspect is provided. It is provided.
[0012]
[Action]
In the rotating disk type waste water treatment apparatus of the present invention according to claim 1, at least one of the rotating disk blocks constituting the rotating disk body has a smaller diameter than the outer diameter of the other rotating disk blocks. This small-diameter rotating disk block is immersed in the waste water supplied into the treatment tank, and the other rotating disk block is immersed in a state where the upper part of the rotating disk block is exposed on the water surface of the waste water. The wastewater purification process is continuously performed by being driven.
[0013]
Therefore, since the other rotating disk blocks of the rotating disk body are half-immersed in the wastewater and are driven to rotate with the upper part exposed to air, aerobic oxidation, nitrification, and re-aeration treatment are effective. And efficient.
[0014]
Moreover, since the rotating disk type wastewater treatment apparatus of the present invention is a single tank uniaxial compact rotating disk type, the structure is simple, and the equipment cost and running cost can be reduced.
[0015]
In the rotating disk type wastewater treatment apparatus according to the second aspect of the present invention, a cover that covers the upper surface of the rotating disk block having a small diameter of the rotating disk body of the rotating disk type wastewater treatment apparatus according to the first aspect is provided. Since it is provided, air is more reliably blocked between the cover and the surface of the waste water.
[0016]
In addition, even if the wastewater level drops below the reference water level and the upper part of the rotating disk block is exposed to air, there is no gap for air to enter from the periphery above the rotating disk block. Since only oxygen is exhausted and oxygen-free air exists, denitrification is effectively performed without being inhibited.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a cross-sectional view showing an example of a rotating disk type wastewater treatment apparatus of the present invention, and FIG. 2 is a side view of FIG.
3 is a sectional view taken along line XX in FIG. 1, FIG. 4 is a sectional view taken along line YY in FIG. 1, and FIG. 5 is a sectional view taken along line ZZ in FIG.
1 and 2, the wastewater treatment apparatus 10 of the present embodiment includes a treatment tank 11 and a rotating disk body 16 described below in detail, which is provided in the treatment tank 11. 11 is comprised by the tank main body 11a and the cover body 11b provided in the upper surface of this tank main body 11a so that attachment or detachment was possible.
[0018]
In the treatment tank 11, a supply port 12 through which waste water is supplied into the tank body 11 a is provided on a side surface on one end side of the lid body 11 b, and a drain port 13 through which the treated purified water is discharged is provided in the supply port 12. It is provided in the upper end of the tank main body 11a which is the opposite side.
[0019]
The inside of the tank body 11a is divided into five blocks by partition plates 14a, 14ab, 14c, and 14d by the side on which the supply port 12 is provided. The oxidation chamber 15a, the nitrification chamber 15b, the denitrification chamber 15c, An air chamber 15d is formed, and oxidation, nitrification, denitrification, and re-aeration are performed in this order.
A stirring chamber 15e is formed at the extreme end.
[0020]
In the oxidation chamber 15a, the nitrification chamber 15b, the denitrification chamber 15c, and the re-aeration chamber 15d, rotating disk blocks 16a, 16b, 16c, and 16d each having a large number of disks arranged in parallel with gaps are respectively arranged. A rotating disk 16 is provided.
In the present embodiment, the rotating disk block 16c has a smaller diameter than the other rotating disk blocks 16a, 16b, and 16d.
[0021]
The rotating disk body 16 is attached in a skewered manner to a rectangular shaft body 18 that is rotatably supported by being pivotally attached to the side surface of the tank body 11a and the partition plate 14d at both ends.
[0022]
In addition, the stirring chamber 17e on the other end side of the tank body 11a is equipped with a stirring blade 17 at the end of the shaft body 18 so that the waste water is stirred.
[0023]
In the wastewater treatment apparatus 10 in which the inside of the treatment tank 11 is configured as described above, power is transmitted to the shaft body 18 by the driving device 19 provided at the outer end of the treatment tank 11, and the rotating disk body 16, that is, each The rotating disk blocks 16a, 16B, 16c, 16d of the chamber are rotated simultaneously.
[0024]
Waste water for purification is continuously supplied so that the water level L is always maintained in a state where the water level L is supplied from the supply port 12 into the tank body 11a.
On the other hand, a flow path 14e is provided at the lower end of the partition plate 14a, and a flow path 14f is provided at the lower end of the partition plate 14c in order to send out the sequentially treated wastewater to the adjacent chamber.
Further, the partition plates 14b and 14d between the partition plate 14a and the partition plate 14c are not provided with a flow path, and waste water is supplied to the adjacent chamber due to overflow.
[0025]
The wastewater supplied as described above is subjected to oxidation, nitrification, denitrification, and re-aeration treatment while sequentially passing through the oxidation chamber 15a, the nitrification chamber 15b, the denitrification chamber 15c, and the re-aeration chamber 15d.
[0026]
In the oxidation chamber 15a, the nitrification chamber 15b, and the re-aeration chamber 15d, the wastewater aerobic oxidation, nitrification, and re-aeration processes are performed above the rotating disk blocks 16a, 16b, and 16d. It is carried out effectively in a semi-submerged state in wastewater.
On the other hand, the denitrification process, which is anaerobic in the denitrification chamber 15c, is performed in a state where the air is shut off while the small-diameter rotating disk block 16c is completely submerged in the wastewater. Processing is possible.
[0027]
Finally, the waste water transferred to the stirring chamber 15e is added with a flocculant from the upper injection port 11c, stirred by the stirring blade 17, dephosphorized, discharged from the discharge port 13, and discharged after solid-liquid separation. It is processed.
[0028]
FIG. 6 is a cross-sectional view showing a modification of the rotating disk wastewater treatment apparatus of the present invention shown in FIG.
Since the basic structure of the rotating disk type wastewater treatment apparatus 20 of the present embodiment is substantially the same, detailed description thereof is omitted.
[0029]
The wastewater treatment apparatus 20 of the present embodiment is submerged below the water level L of the wastewater above the small-diameter rotating disk block 16c disposed in the denitrification chamber 15c of the wastewater treatment apparatus 10 shown in FIG. It shows an example in which a cover 1 provided with a side wall 1a of a depth of is provided.
[0030]
By providing the cover 1, the air is more reliably blocked between the cover and the water surface of the waste water.
Even if the water level of the waste water drops below the reference water level and the upper part of the rotating disk block 16c is exposed to air, the intrusion of air around the rotating disk block 16c as described above. Since there is no gap to be exhausted and only oxygen is exhausted and oxygen-free air exists, denitrification is performed more effectively without being inhibited.
[0031]
FIG. 7 is a cross-sectional view showing another example of the rotating disk type wastewater treatment apparatus of the present invention, and FIG. 8 is a side view of FIG.
9 is a sectional view taken along line AA in FIG. 7, FIG. 10 is a sectional view taken along line BB in FIG. 7, and FIG. 11 is a sectional view taken along line CC in FIG.
7 and 8, the wastewater treatment apparatus 30 of this embodiment is a treatment tank 31 provided with a rotating disk body 36 described in detail below. The treatment tank 31 includes a tank body 31a and this tank. It is comprised with the cover body 31b provided in the upper surface of the main body 31a so that attachment or detachment was possible.
[0032]
In the treatment tank 31, a supply port 32 through which waste water is supplied into the tank body 31 a is provided on the side surface on one end side of the lid 31 b, and a drain port 33 through which the treated purified water is discharged is provided in the supply port 32. It is provided in the upper end of the tank main body 31a which is the other side.
[0033]
The inside of the tank body 31a is divided into five blocks by partition plates 34a, 34ab, 34c, and 34d on the side where the supply port 32 is provided, and in turn, an oxidation part 35a, a nitrification part 35b, a denitrification part 35c, A gas portion 35d is formed, and oxidation, nitrification, denitrification, and re-aeration are performed in this order.
Moreover, the stirring part 35e is formed in the extreme end.
[0034]
The partition plates 34a, 34ab, 34c, 34d do not completely partition each part, and surround the periphery of the rotating disk at the boundary of each rotating disk part of the rotating disk body 36 described in detail below. It is provided in a shape (see the cross-sectional view of FIG. 9).
[0035]
The oxidation part 35a, the nitrification part 35b, the denitrification part 35c, and the re-aeration part 35d are provided with rotating disk parts 36a, 36b, 36c, 36d in which a large number of disks are arranged in parallel with a gap. Thus, a rotating disk body 36 is configured.
[0036]
In the present embodiment, the rotating disk block 16c has a smaller diameter than the other rotating disk blocks 16a, 16b, and 16d.
[0037]
No gap is provided between the rotating disk portions 36a, 36b, 36c, and 36d, and they are integrally attached to the rectangular shaft body 38 with the side surfaces in contact with each other like a skewer.
The shaft body 38 is rotatably supported by having both ends pivotally attached to the side surface of the tank body 31a and the partition plate 34d.
[0038]
A stirring blade 37 is attached to the end of the shaft body 38 extended to the stirring portion 35e on the other end side of the tank body 31a so that the waste water is stirred.
[0039]
In the wastewater treatment apparatus 30 in which the inside of the treatment tank 31 is configured as described above, the power is transmitted to the shaft body 38 by the driving device 39 provided at the outer end of the treatment tank 31, and the rotating disk part 36a of each part, 36B, 36c, and 36d are simultaneously rotated.
[0040]
Waste water for purification is continuously supplied in a state where the water level L is supplied from the supply port 32 into the tank body 31a up to the water level L, and the water level L is always maintained.
On the other hand, a flow path 34e is provided at the lower end of the partition plate 34a, and a flow path 34f is provided at the lower end of the partition plate 34c, respectively, in order to send out the sequentially treated wastewater to the adjacent chamber.
Further, the partition plates 34b and 34d between the partition plate 34a and the partition plate 34c are not provided with a flow path, and waste water is supplied to the adjacent chamber due to overflow.
[0041]
The wastewater supplied as described above is subjected to oxidation, nitrification, denitrification, and re-aeration treatment while sequentially passing through the oxidation unit 35a, the nitrification unit 35b, the denitrification unit 35c, and the re-aeration unit 35d.
[0042]
In the oxidation part 35a, the nitrification part 35b, and the re-aeration part 35d, oxidation, nitrification, and re-aeration processes, which are aerobic wastewater, are performed above the rotating disk parts 36a, 36b, and 36d. It is carried out effectively in a semi-submerged state in wastewater.
On the other hand, unlike the conventional wastewater treatment apparatus, the denitrification process that is anaerobic in the denitrification part 35c is performed by exposing the upper part of the rotating disk block to air, and the rotating disk part 36c is disposed of wastewater. Therefore, the denitrification process can be performed reliably and effectively.
[0043]
Finally, the waste water transferred to the stirring unit 35e is added with a flocculant from the upper injection port 31c, stirred by the stirring blade 37, dephosphorized, discharged from the discharge port 33, and discharged after solid-liquid separation. It is processed.
[0044]
FIG. 12 is a cross-sectional view showing another modification of the rotating disk type wastewater treatment apparatus of the present invention, and FIG. 13 is a side view showing a half section of FIG.
12 and 13, the wastewater treatment apparatus 40 of this embodiment is a treatment tank 41 equipped with the rotating disk body 4 described in detail below. The treatment tank 41 includes a tank body 41a and this tank. It is comprised with the cover body 41b provided in the upper surface of the main body 41a so that attachment or detachment was possible.
[0045]
In the treatment tank 41, a supply port 42 through which waste water is supplied into the tank body 41a is provided on the side surface on one end side of the lid body 41b, and a drain port 43 through which the treated purified water is discharged is provided in the supply port 42. It is provided in the upper end of the tank main body 41a which is the opposite side.
[0046]
The rotating disc body 4 provided inside the tank body 41a includes a rotating disc portion 44 in which a large number of discs having a large outer diameter are arranged side by side with a gap, and a rotating portion having a smaller diameter than the rotating disc portion 44. The disk portions 45 are alternately arranged on a rectangular shaft 46 in a skewered manner.
The said shaft body 46 is rotatably supported by the bearing 46a provided in the side wall of the both ends of the tank main body 41a.
[0047]
The wastewater treatment apparatus 40 of this embodiment performs oxidation, denitration, re-aeration, and dephosphorization processes sequentially from the wastewater supply port 42 side by the rotating disk portion 44 half-immersed in the wastewater. The denitrification is repeatedly performed effectively by the small-diameter rotating disc portion 45 in a state of being completely submerged (completely submerged).
[0048]
In the wastewater treatment apparatus 40 in which the inside of the treatment tank 41 is configured as described above, a driving device 47 is provided at the outer upper end of the treatment tank 41, and this rotational power is supplied to the chain or belt at the end in the treatment tank 41. Is transmitted to the shaft body 38, and each rotating disk body 4 is rotationally driven.
[0049]
Waste water for purification is continuously supplied in a state where the water level L is supplied from the supply port 42 into the tank body 41a up to the water level L, and the water level L is always maintained.
While the wastewater supplied into the tank body 41a is transferred, oxidation, denitrification, denitration, denitrification, re-aeration, denitrification, and dephosphorization processes are performed in this order, and are purified and discharged from the discharge port 43. The
[0050]
As described above, the denitrification treatment that is anaerobic is performed by blocking the air in the state in which the rotating disk portion 45 is fully immersed in the wastewater, and thus a reliable and effective denitrification treatment is possible.
[0051]
【The invention's effect】
In the rotating disk type waste water treatment apparatus of the present invention according to claim 1, at least one of the rotating disk blocks constituting the rotating disk body has a smaller diameter than the outer diameter of the other rotating disk blocks. This small-diameter rotating disk block is immersed in the wastewater supplied into the treatment tank, and the other rotating disk block is immersed in a state where the upper surface of the rotating disk block is exposed to the wastewater surface. Then, the waste water purification process is continuously performed.
[0052]
Therefore, since the other rotating disk blocks of the rotating disk body are half-immersed in the wastewater and are driven to rotate with the upper part exposed to air, aerobic oxidation, nitrification, and re-aeration treatment are effective. And efficient.
[0053]
Moreover, the rotating disk type wastewater treatment apparatus of the present invention has a single tank and single shaft type compact and simple structure, and can suppress the equipment cost and the running cost at a low cost.
[0054]
In the rotating disk type wastewater treatment apparatus according to the second aspect of the present invention, a cover that covers the upper surface of the rotating disk block having a small diameter of the rotating disk body of the rotating disk type wastewater treatment apparatus according to the first aspect is provided. Since it is provided, air is more reliably blocked between the cover and the surface of the waste water.
[0055]
In addition, even if the wastewater level drops below the reference water level and the upper part of the rotating disk block is exposed to air, there is no gap for air to enter from the periphery above the rotating disk block. Since only oxygen is exhausted and oxygen-free air exists, denitrification is effectively performed without being inhibited.
Therefore, it is suitably used as a rotating disk type wastewater treatment apparatus.
[Brief description of the drawings]
FIG. 1 is a sectional view showing an example of a rotating disk type wastewater treatment apparatus of the present invention.
FIG. 2 is a side view of FIG.
3 is a sectional view taken along line XX in FIG.
4 is a YY sectional view of FIG.
5 is a ZZ cross-sectional view of FIG. 1. FIG.
6 is a cross-sectional view showing a modification of the rotating disk wastewater treatment apparatus of the present invention shown in FIG.
FIG. 7 is a sectional view showing another example of the rotating disk type wastewater treatment apparatus of the present invention.
8 is a side view of FIG. 7. FIG.
9 is a cross-sectional view taken along the line AA in FIG.
10 is a sectional view taken along line BB in FIG.
11 is a cross-sectional view taken along the line CC of FIG.
FIG. 12 is a cross-sectional view showing still another example of the rotating disk type wastewater treatment apparatus of the present invention.
13 is a side view showing a half section of FIG. 12. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cover 1a Side wall 4, 16, 36 Rotating disc body 10, 20, 30, 40 Waste water treatment apparatus 11, 31, 41 Processing tank 11a, 31a, 41a Tank main body 11b, 31b, 41b Cover body 12, 32, 42 Supply Ports 13, 33, 43 Drain ports 14a, 14b, 14c, 14d Partition plates 14e, 14f, 34e, 34f Channel 15a Oxidation chamber 15b Nitrification chamber 15c Denitrification chamber 15d Re-aeration chamber 15e Stirring chambers 16a, 16b, 16c, 16d Rotating disk block 17, 37 Agitating blades 18, 38, 46 Shaft bodies 19, 39, 47 Drive devices 34a, 34b, 34c, 34d Partition plate 35a Oxidizing part 35b Nitrification part 35c Denitrification part 35d Re-aeration part 35e Stirring Portions 36a, 36b, 36c, 36d, 44, 45 Rotating disc portion 46a Bearing

Claims (2)

複数の回転円板が並設されて構成された回転円板ブロックが、適宜間隔をあけて軸体に回転可能に装着されて回転円板体となされ、この回転円板体が処理槽の槽本体内にほぼ水平方向に装備されてなる回転円板式廃水処理装置であって、上記回転円板体を構成する回転円板ブロックの内、少なくとも1つがその他の回転円板ブロックの外径より小径の回転円板ブロックとなされ、この小径の回転円板ブロックが処理槽内に供給された廃水に没した状態で、その他の回転円板ブロックがその上方を廃水の水面上に露出した状態で浸漬された上、回転駆動されて廃水の浄化処理が連続的に行われることを特徴とする回転円板式廃水処理装置。A rotating disk block composed of a plurality of rotating disks arranged in parallel is rotatably mounted on a shaft body at an appropriate interval to form a rotating disk body, and this rotating disk body is a tank of a processing tank. A rotating disk type wastewater treatment apparatus equipped in a substantially horizontal direction in the body, wherein at least one of the rotating disk blocks constituting the rotating disk body has a diameter smaller than the outer diameter of the other rotating disk blocks. This rotating disk block is immersed in the waste water supplied into the treatment tank, and the other rotating disk block is immersed with the upper surface exposed on the surface of the waste water. In addition, the rotary disk type waste water treatment apparatus is characterized in that the waste water purification process is continuously performed by being driven to rotate. 上記回転円板体の小径の回転円板ブロックの上面に、その上方を覆うカバーが設けられていることを特徴とする請求項1記載の回転円板式廃水処理装置。The rotating disk waste water treatment apparatus according to claim 1, wherein a cover is provided on an upper surface of the rotating disk block having a small diameter of the rotating disk body.
JP1868397A 1997-01-31 1997-01-31 Rotating disc type wastewater treatment equipment Expired - Lifetime JP3851399B2 (en)

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JP1868397A JP3851399B2 (en) 1997-01-31 1997-01-31 Rotating disc type wastewater treatment equipment

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JPH10216759A JPH10216759A (en) 1998-08-18
JP3851399B2 true JP3851399B2 (en) 2006-11-29

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Publication number Priority date Publication date Assignee Title
KR19990073490A (en) * 1999-07-13 1999-10-05 이영호 Wastewater Treatment Apparatus and Method Using Rotating Biofilm Contact Tube Reactor
KR100465884B1 (en) * 2002-04-24 2005-01-13 한영교 High strength BOD, N, P and low product sludge in piggery waste water treatment by rotating biological contactors
CN105293824B (en) * 2015-10-27 2017-07-14 沈阳建筑大学 A kind of disk type multistage composite biological cleaning integrated technique

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