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生(sheng)活汙(wu)水(shui)處理(li)設(she)備(bei)
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壹(yi)體化生(sheng)活汙(wu)水(shui)處理(li)設(she)備(bei)是(shi)將(jiang)生(sheng)活汙(wu)水(shui)中(zhong)的有(you)害(hai)物(wu)質(zhi)和(he)汙染環境(jing)成(cheng)份清除(chu)、降(jiang)解(jie)做(zuo)無(wu)害(hai)處理(li)。 農(nong)村生(sheng)活汙(wu)水(shui)處理(li)要著重考慮(lv)選(xuan)用成(cheng)熟(shu)可(ke)靠,適合農(nong)村特點和實(shi)際汙(wu)水(shui)處理(li)適用技(ji)術。農(nong)村汙水(shui)處理(li),可(ke)根據實(shi)際情(qing)況將水(shui)質(zhi)進(jin)行中(zhong)和(he)農(nong)用產(chan)品,從(cong)而達(da)到回用及(ji)環(huan)保降解排(pai)放(fang)。
目(mu)前(qian)國(guo)內外應(ying)用治理(li)的處理(li)技(ji)術比(bi)較多(duo),名稱也多(duo)種多(duo)樣,但(dan)從(cong)工藝(yi)原理(li)上(shang)通(tong)常(chang)可(ke)歸為(wei)兩(liang)類(lei):壹(yi)類(lei)是(shi)自(zi)然處理(li)系統。利用土(tu)壤(rang)過濾、植(zhi)物(wu)吸收和微生(sheng)物(wu)分解的原理(li),又(you)稱為(wei)生(sheng)態處(chu)理(li)系統。第二(er)類是(shi)生(sheng)物(wu)處理(li)系統,又可(ke)分為(wei)好(hao)氧(yang)生(sheng)物(wu)處理(li)和(he)厭氧(yang)生(sheng)物(wu)處理(li);處(chu)於(yu)運(yun)行維護管理(li)的需要,又將(jiang)此類(lei)生(sheng)物(wu)處理(li)系統做(zuo)成(cheng)農(nong)村生(sheng)活汙(wu)水(shui)處理(li)設(she)備(bei)。
去(qu)除(chu)有(you)機(ji)物(wu)汙染物(wu)及(ji)氨(an)氮(dan)主(zhu)要依賴(lai)於設(she)備(bei)中(zhong)的AO生(sheng)物(wu)處理(li)工(gong)藝(yi)。其(qi)工(gong)作原理(li)是(shi)在(zai)*,由(you)於汙(wu)水(shui)有(you)機(ji)物(wu)濃(nong)度(du)很(hen)高(gao),微生(sheng)物(wu)處於缺(que)氧(yang)狀態,此(ci)時(shi)微生(sheng)物(wu)為(wei)兼(jian)性(xing)微(wei)生(sheng)物(wu),它們將(jiang)汙(wu)水(shui)中(zhong)的有(you)機(ji)氮(dan)轉(zhuan)化分解成(cheng)NH3-N,同(tong)時(shi)利用有(you)機(ji)碳源作為(wei)電(dian)子供(gong)體,將NO2-N、NO3-N轉(zhuan)換成N2,而且(qie)還(hai)利用部(bu)分有(you)機(ji)碳源和NH3-N合成新的細胞物(wu)質(zhi)。所以*池(chi)不(bu)僅具(ju)有(you)壹定的有(you)機(ji)物(wu)去(qu)除(chu)功(gong)能,減輕後(hou)續好(hao)氧(yang)池(chi)的有(you)機(ji)負荷。有(you)利於硝(xiao)化作(zuo)用的進(jin)行,而且(qie)依靠(kao)原水(shui)中(zhong)存(cun)在(zai)的較高(gao)濃(nong)度(du)有(you)機(ji)物(wu),完成反(fan)硝(xiao)化作(zuo)用,zui終(zhong)消(xiao)除(chu)氮(dan)的富(fu)營(ying)養化汙(wu)染。在O級(ji),由(you)於有(you)機(ji)物(wu)濃(nong)度(du)已(yi)大(da)幅(fu)度(du)降(jiang)低(di),但(dan)汙(wu)水(shui)中(zhong)仍(reng)有(you)壹定量的有(you)機(ji)物(wu)及(ji)較(jiao)高(gao)NH3-N存在(zai)。為(wei)了(le)使(shi)有(you)機(ji)物(wu)得到進(jin)壹步(bu)氧化分解,同(tong)時(shi)在碳化作(zuo)用完(wan)成(cheng)情(qing)況下,硝(xiao)化作(zuo)用能順(shun)利進(jin)行。在O級設(she)置有(you)機(ji)負荷較低的好(hao)氧(yang)生(sheng)物(wu)接(jie)觸(chu)氧(yang)化池(chi)。在(zai)O級(ji)池中(zhong)主(zhu)要存在(zai)好(hao)氧(yang)微(wei)生(sheng)物(wu)及(ji)自(zi)氧型(xing)細菌(硝(xiao)化菌).其中(zhong)好(hao)氧(yang)微(wei)生(sheng)物(wu)將有(you)機(ji)物(wu)分解成(cheng)CO2和H2O;自(zi)氧型(xing)細菌(硝(xiao)化菌)利用有(you)機(ji)物(wu)分解產(chan)生(sheng)的無(wu)機(ji)碳或(huo)空(kong)氣(qi)中(zhong)的CO2作為(wei)營(ying)養源,將汙水(shui)中(zhong)的NH3-N轉化成(cheng)NO2-N、NO3—N,O級(ji)池(chi)的出水(shui)部(bu)分回流到*池。為(wei)*池(chi)提(ti)供(gong)電(dian)子接(jie)受體,通過反(fan)硝(xiao)化作(zuo)用zui終(zhong)消(xiao)除(chu)氮(dan)汙(wu)染。
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