unitank
UNITANK廢(fei)水處理(li)工藝(yi)是SBR 工藝(yi)的一種(zhong)變(bian)型(xing)(xing),其廢(fei)水處理(li)池的池型(xing)(xing)為矩形,三池共用池壁(bi),節(jie)省投資(zi),同時(shi)占地面積省;系統(tong)在恒定水位下運(yun)(yun)行,運(yun)(yun)行方(fang)式較為靈活(huo),可用于脫(tuo)氮除(chu)磷。
作用
用(yong)于UNITANK系(xi)統(tong)有(you)效容積系(xi)數不(bu)高,僅適用(yong)于中小(xiao)型污水處理廠。現提出增大系(xi)統(tong)有(you)效容積的(de)對策.并就其應(ying)用(yong)進行分析探討(tao)。
關鍵(jian)詞(ci)
UNITANK工藝;廢水處(chu)理;有(you)效容積;應用
UNI—TANK廢水處(chu)理工藝(yi)是由(you)比(bi)利(li)時史格(ge)斯清水公司(SEGHERS ENGINEERING WA’11Eli NV)開發(fa)的(de)一種(zhong)專(zhuan)利(li)工藝(yi)。它是傳統(tong)SBR工藝(yi)的(de)一種(zhong)變型和發(fa)展(zhan),類似于三溝(gou)式氧化(hua)溝(gou)工藝(yi),是一種(zhong)高效、經濟(ji)、靈(ling)活的(de)污水處(chu)理工藝(yi),具有(you)良好的(de)發(fa)展(zhan)前景。
系統(tong)構造特點
1.1基本結構(gou)
UNITANK系統(tong)由3個矩形池(chi)(chi)(chi)(chi)組成,3個池(chi)(chi)(chi)(chi)平行而又相(xiang)通(tong),每(mei)個池(chi)(chi)(chi)(chi)均設(she)有供氧(yang)設(she)備,可采(cai)用鼓(gu)風曝氣(qi)。其(qi)中中間池(chi)(chi)(chi)(chi)只作為曝氣(qi)池(chi)(chi)(chi)(chi),兩個邊池(chi)(chi)(chi)(chi)交(jiao)替(ti)作為曝氣(qi)池(chi)(chi)(chi)(chi)和沉淀池(chi)(chi)(chi)(chi),邊池(chi)(chi)(chi)(chi)設(she)有固(gu)定出水(shui)(shui)(shui)堰和剩余污泥排(pai)放口。進(jin)(jin)入系統(tong)的(de)污水(shui)(shui)(shui)通(tong)過管道或者(zhe)渠道配水(shui)(shui)(shui),交(jiao)替(ti)進(jin)(jin)入3個池(chi)(chi)(chi)(chi)中的(de)任(ren)意一個,系統(tong)實現連續進(jin)(jin)水(shui)(shui)(shui)連續排(pai)水(shui)(shui)(shui),如(ru)圖1所示。
1.2運(yun)行方式
由于UNITANK工藝是傳統(tong)SBR 工藝的(de)(de)一種變型,具有SBR工藝運行(xing)方式(shi)靈(ling)活(huo)的(de)(de)優點,可以通過時間及空(kong)間上(shang)的(de)(de)控(kong)制及曝氣(qi)、攪拌的(de)(de)控(kong)制,使3個池內形成好(hao)氧(yang)(yang)、缺氧(yang)(yang)或者厭氧(yang)(yang)環境(jing),實現多種工藝目的(de)(de),如(ru):碳源有機物的(de)(de)去(qu)除(chu)、脫氨或者除(chu)磷。根據具體處理(li)對(dui)象的(de)(de)不同,UNITANK系統(tong)的(de)(de)運行(xing)方式(shi)不同,下面對(dui)好(hao)氧(yang)(yang)UNITANK處理(li)系統(tong)作(zuo)一介紹(shao)。
好氧UNITANK系統的運行過程(cheng)包(bao)括6個階段(duan):
(1)污水(shui)進(jin)入邊池(chi)(chi)A,池(chi)(chi)內(nei)進(jin)行曝氣,池(chi)(chi)內(nei)混合液 經中間池(chi)(chi)B進(jin)入邊池(chi)(chi)C,C池(chi)(chi)通過固定(ding)出水(shui)堰排水(shui);
(2)A池停止進水,繼續曝(pu)氣(qi),污水進入B池,C 池繼續排(pai)水;
(3)A池停止曝氣,靜沉(chen),污水繼續進入(ru)B池,C 池繼續排水;
(4)污水進入邊池C,池內進行曝氣,混合液經中間池B進入A池,A池通過固(gu)定(ding)出水堰排水;
(5)C池停(ting)止進(jin)水(shui),繼(ji)續(xu)曝氣,污(wu)水(shui)進(jin)入(ru)B池,A池繼(ji)續(xu)排水(shui);
(6)C池(chi)(chi)停止(zhi)曝(pu)氣,靜沉,污水(shui)(shui)繼(ji)(ji)續進(jin)(jin)入B池(chi)(chi),A池(chi)(chi)繼(ji)(ji)續排水(shui)(shui),直至排水(shui)(shui)完畢,完成一個(ge)運(yun)行(xing)周期(qi)。整個(ge)周期(qi)內中(zhong)間(jian)池(chi)(chi)B始終(zhong)進(jin)(jin)行(xing)曝(pu)氣,其中(zhong)(1)~(3)階段(duan)和(4)~(6)階段(duan)運(yun)行(xing)方向正好相反。
當脫氮除磷時,UNITANK系統(tong)的曝氣池內(nei)除了設(she)有曝氣設(she)備外,還(huan)(huan)設(she)有攪拌設(she)備等,根(gen)據(ju)工(gong)藝要求,通過對曝氣和攪拌沒備的控制存池內(nei)形(xing)成交替的好氧(yang)、缺氧(yang)、厭氧(yang)狀態。這些工(gong)藝過程的實現(xian)依賴于在(zai)線(xian)溶氧(yang)儀、在(zai)線(xian)氧(yang)化還(huan)(huan)原電位等監(jian)控設(she)備和系統(tong)。
1 3工藝特點(dian)
UNITANK工藝具有傳(chuan)統(tong)SBR工藝的(de)一(yi)些優(you)點(dian)(dian),同時在其(qi)基(ji)礎上又有較(jiao)大的(de)改進,其(qi)特點(dian)(dian)如下:
(1)與(yu)傳統(tong)活(huo)性污(wu)泥法相比,UNlTANK系統(tong)小省去了污(wu)泥回流(liu),節(jie)省了大量的(de)投資,運行費用較(jiao)低(di)。
(2)所(suo)有的池體均采用矩形,可(ke)以共用池壁(bi),而且3個(ge)池之(zhi)間(jian)水力押通,中間(jian)池壁(bi)水受單(dan)向水壓(ya),因而土建省,同時(shi)占地(di)面積小(xiao)。
(3)系統(tong)在(zai)恒定(ding)水位下運(yun)行,水力負(fu)荷穩定(ding),不僅可以(yi)充分利用反應池的(de)有(you)效(xiao)容積,而且(qie)可以(yi)降(jiang)低(di)對(dui)管(guan)道閥等(deng)設備的(de)要求。同時(shi),在(zai)恒定(ding)水位下運(yun)行,曝氣(qi)系統(tong)可以(yi)采(cai)(cai)用表(biao)面(mian)曝氣(qi)設備,使曝氣(qi)系統(tong)的(de)管(guan)理(li)和維護較為方便;采(cai)(cai)用構造簡單的(de)固定(ding)出水堰(yan)代替價(jia)格(ge)昂貴的(de)潷水器,節省(sheng)了投資。
(4)可(ke)以(yi)根據(ju)反應(ying)池內的溶解氧(yang)(yang)、氧(yang)(yang)化還原電位等(deng)在線監測數據(ju),通(tong)過改(gai)變(bian)供氧(yang)(yang)量,切換進出水(shui)閥門,以(yi)及(ji)改(gai)變(bian)好氧(yang)(yang)、缺氧(yang)(yang)及(ji)厭氧(yang)(yang)反應(ying)時間等(deng)控制手段,在空(kong)間上營造合適(shi)的反應(ying)條(tiao)件,高(gao)效(xiao)地去除(chu)污水(shui)中的碳源(yuan)有(you)機物,以(yi)及(ji)脫氮除(chu)磷(lin)。
系(xi)統的應用
2.I應用概況
UNITANKT藝自問世以來,已經(jing)在世界(jie)各地得到廣泛的(de)研究和(he)隨用(yong)(yong)。世界(jie)各地已經(jing)有160多個此外,廣東珠(zhu)江啤酒采用(yong)(yong)了該項(xiang)技術(shu),建成投(tou)產后效槊良好。2.2應用(yong)(yong)方向(xiang)的(de)思考
目前國內(nei)已經有(you)科研(yan)(yan)院所對(dui)UNlTANK工(gong)藝進行研(yan)(yan)究。東南(nan)大學環境工(gong)程系(xi)和南(nan)京市(shi)政設計(ji)研(yan)(yan)究院采用(yong)(yong)UNITANK工(gong)藝處理城市(shi)污水(shui),研(yan)(yan)究UNITANK工(gong)藝的脫氯除磷性能(neng),取得(de)良好的效(xiao)(xiao)果。但在實際應(ying)用(yong)(yong)中,UNITANK工(gong)藝是(shi)否適合我國的國情,足否適合污水(shui)處理的各(ge)個領域,對(dui)于工(gong)業廢水(shui)處理是(shi)否有(you)著不同的下豈特性,這些(xie)都是(shi)值(zhi)得(de)探討的。下面對(dui)此進行初(chu)步的分(fen)析(xi)和討論。2.2.1有(you)效(xiao)(xiao)容積(ji)分(fen)析(xi)
由于UNITANK系(xi)(xi)統(tong)連續進水連續出水,中間(jian)(jian)(jian)池(chi)(chi)(chi)(chi)連續曝(pu)(pu)氣(qi),其(qi)容(rong)(rong)積利用(yong)(yong)(yong)率為(wei)(wei)100%,兩個(ge)邊(bian)(bian)池(chi)(chi)(chi)(chi)交替(ti)作(zuo)為(wei)(wei)曝(pu)(pu)氣(qi)池(chi)(chi)(chi)(chi)和(he)(he)沉(chen)淀(dian)池(chi)(chi)(chi)(chi),這(zhe)(zhe)樣在(zai)一(yi)(yi)個(ge)運(yun)行周期(qi)內,實(shi)(shi)際(ji)上相當于一(yi)(yi)個(ge)邊(bian)(bian)池(chi)(chi)(chi)(chi)完(wan)全起著沉(chen)淀(dian)池(chi)(chi)(chi)(chi)的(de)作(zuo)用(yong)(yong)(yong),進行泥(ni)水分(fen)離,同時(shi)由于排(pai)水之前還(huan)必須(xu)(xu)安排(pai)沉(chen)淀(dian)時(shi)間(jian)(jian)(jian),因此,邊(bian)(bian)池(chi)(chi)(chi)(chi)的(de)有(you)(you)(you)效(xiao)(xiao)容(rong)(rong)積不(bu)足50%,實(shi)(shi)際(ji)應(ying)(ying)用(yong)(yong)(yong)中邊(bian)(bian)池(chi)(chi)(chi)(chi)和(he)(he)中間(jian)(jian)(jian)池(chi)(chi)(chi)(chi)一(yi)(yi)般容(rong)(rong)積相等(deng),這(zhe)(zhe)樣整個(ge)系(xi)(xi)統(tong)的(de)有(you)(you)(you)效(xiao)(xiao)容(rong)(rong)積與(yu)總池(chi)(chi)(chi)(chi)容(rong)(rong)之比小于66.7%,假定(ding)某個(ge)好(hao)氧UNITANK系(xi)(xi)統(tong)的(de)運(yun)行周期(qi)為(wei)(wei)8 h,每(mei)個(ge)邊(bian)(bian)池(chi)(chi)(chi)(chi)廢(fei)水的(de)沉(chen)淀(dian)時(shi)間(jian)(jian)(jian)為(wei)(wei)3h.則每(mei)個(ge)邊(bian)(bian)池(chi)(chi)(chi)(chi)的(de)實(shi)(shi)際(ji)曝(pu)(pu)氣(qi)時(shi)間(jian)(jian)(jian)為(wei)(wei)3 b,其(qi)余(yu)5 h用(yong)(yong)(yong)于排(pai)水,則系(xi)(xi)統(tong)的(de)有(you)(you)(you)效(xiao)(xiao)容(rong)(rong)積僅(jin)占58.3%、,這(zhe)(zhe)就意味(wei)著該UNITANK系(xi)(xi)統(tong)4l .7%的(de)池(chi)(chi)(chi)(chi)容(rong)(rong)用(yong)(yong)(yong)于沉(chen)淀(dian)和(he)(he)排(pai)水,而(er)傳統(tong)的(de)二沉(chen)池(chi)(chi)(chi)(chi)廢(fei)水的(de)水力(li)(li)停(ting)留(liu)時(shi)間(jian)(jian)(jian)僅(jin)為(wei)(wei)2 h~3 h。當傳統(tong)活性污泥(ni)系(xi)(xi)統(tong)(包括(kuo)曝(pu)(pu)氣(qi)池(chi)(chi)(chi)(chi)和(he)(he)二沉(chen)池(chi)(chi)(chi)(chi))的(de)水力(li)(li)停(ting)留(liu)時(shi)間(jian)(jian)(jian)較長時(shi),假定(ding)為(wei)(wei)lO h,則系(xi)(xi)統(tong)的(de)容(rong)(rong)積利用(yong)(yong)(yong)書可(ke)達70%以上。在(zai)實(shi)(shi)際(ji)應(ying)(ying)用(yong)(yong)(yong)中必須(xu)(xu)對UNITANK系(xi)(xi)統(tong)的(de)有(you)(you)(you)效(xiao)(xiao)容(rong)(rong)積加(jia)(jia)以考(kao)慮。為(wei)(wei)了提(ti)高UNITANK系(xi)(xi)統(tong)的(de)有(you)(you)(you)效(xiao)(xiao)容(rong)(rong)積,可(ke)以采取(qu)加(jia)(jia)大中間(jian)(jian)(jian)池(chi)(chi)(chi)(chi)的(de)辦法,以提(ti)高系(xi)(xi)統(tong)的(de)經濟性。例如,可(ke)將邊(bian)(bian)池(chi)(chi)(chi)(chi)容(rong)(rong)積設計(ji)為(wei)(wei)中間(jian)(jian)(jian)池(chi)(chi)(chi)(chi)容(rong)(rong)積的(de)一(yi)(yi)半(ban)。實(shi)(shi)際(ji)應(ying)(ying)用(yong)(yong)(yong)中,還(huan)必須(xu)(xu)考(kao)慮其(qi)他(ta)有(you)(you)(you)關問題,比如反(fan)應(ying)(ying)池(chi)(chi)(chi)(chi)的(de)平面(mian)布置,進水點的(de)布置以及邊(bian)(bian)池(chi)(chi)(chi)(chi)承受的(de)水力(li)(li)負(fu)荷等(deng):
中天恒遠(yuan)污水處理設備聯系(xi)方(fang)式:
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