Fosfooraska ku jira maareynta biyaha wasakhda ayaa keenay cadaadis badan, iyo ka saarista fosfooraska si hufan ayaa degdeg ah.

1. Ka saarista fosfooraska kiimikada

Waqtigan xaadirka ah, hababka fosfooraska looga saaro bulaacada magaalooyinka waxaa ka mid ah ka saarista fosfooraska noolaha, ka saarista fosfooraska kiimikada, iyo isku darka hababka daaweynta kiimikada. Habka ka saarista fosfooraska bayooloji waa hab ilaa xad dhaqaale, laakiin ay sabab u tahay iska hor imaadka u dhexeeya denitrification iyo hababka saarista fosfooraska marka la eego da'da wasakhda, isha kaarboonka, iwm, fiirsashada wasakhda TP waa mid aan degganayn oo xitaa ma buuxin karto heerarka qiiqa qaranka. Sidaa darteed, marka ka saarista fosfooraska noolaha aysan buuxin karin heerarka qiiqa, wakiilada kiimikaad ayaa badanaa loo isticmaalaa si kor loogu qaado saarista fosfooraska. Ka saarista fosfooraska kiimikada inta badan waxay ku lug leedahay ku darista milixda birta ah ee aan organic ahayn biyaha wasakhda ah si ay ula falgasho milixyada milmay (sida phosphates) ee biyaha wasakhda ah, abuurista walxo granular ah iyo kuwa aan milmi karin. Walxaha ka saara fosfooraska kiimikaad ee caadiga ah waxay u badan yihiin wakiilada cusbada birta ah iyo kalsiyum hydroxide. Tixgelinta dhaqaalaha awgeed, milixda birta ah ee loo isticmaalo roobabka fosfooraska ayaa u badan cusbada Fe, cusbada Fe, iyo Al cusbada. Maqaalkani waxa uu qaadanayaa polyaluminum chloride (PAC) sida shayga cilmi-baarista oo u sahmiya isticmaalkiisa daaweynta biyaha wasakhda ah.

2. Isticmaalka chloride polyaluminum ee daaweynta biyaha wasakhda ah

1. Taariikhda

Wenzhou Xipian ee daawaynta bulaacada waxay leedahay wadarta guud ee daaweynta biyaha wasakhda ah 250000 m3/d. Habka daaweynta biyaha wasakhda ah ee wajiga koowaad ee cusboonaysiinta mashruuca waa "CAST-MBBR+ taangiga sedimentation magnetic+ fiber rotary disc filter filter"; Habka daaweynta biyaha wasakhda ah ee mashruuca ballaarinta Wajiga II waxaa ka mid ah taangiga A/0 oo badan (A2/O oo la hagaajiyay), xayndaab leydi ah oo gudaha ah iyo taangiga sedimentation sare, taangiga sedimentation magnetic, iyo fiber si ay u adsorption kolloid sida walax. iyo qaybo ganaax ah oo ganaax ah.

A1Cl+KPO → AlPO ↓+3KCl (1)

Al+30H → Al (OH) ↓ (2)

3. Xisaabinta qiyaasta chloride polyaluminum

Qaadashada Wenzhou Xipian ee daawaynta bullaacadaha tusaale ahaan, wadarta guud ee daawaynta biyaha wasakhda ah ee warshaddu waa 250000 m3/d, xooga TP ee saamaynta lehna waa 1.5 mg/L. Marka loo eego heerka koowaad A heerka dheecaanka bulaacada magaalooyinka, fiirsashada wasakhda TP waa in ay ka yaraataa 0.5 mg/L. PAC reagent-ka waxa tijaabiyay shaybaadhka oo waxa ku jira A1 waa 5.32%. Cufnaanta wakiilka PAC waa 1.12kg/L. Marka roobka kiimikaad loo isticmaalo ka saarista fosfooraska, 1mol oo aluminium ah wuxuu cunaa 1mol oo fosfooras ah, taas oo macnaheedu yahay in 1g oo fosfooraska laga saaro waxay u baahan tahay 0.87g oo aluminium ah. Xaqiiqda, falcelinta 100% lama fuliyo. Tusaale ahaan, ion birta iyo OH ayaa ku tartami doona samaynta hydroxides. Sidaa darteed, qiyaasta dhabta ah waxay u baahan tahay in la dhaafo si loo hubiyo in uruurinta wasakhdu ay la kulanto heerka. Jarmalku wuxuu soo jeediyay isku-darka isku-darka inta lagu jiro xisaabinta β Fikradda isku-darka isku-darka waxaa saameeya arrimo badan, iyo xaaladaha ugu wanaagsan, β= 1; Xaalado aan fiicneyn, β= 2 ilaa 3 ama ka sareeya, oo lagu go'aamiyo tijaabooyinka qiyaasta inta lagu jiro qiyaasta dhabta ah.

P load=25000m/d × (0.0015-0.0005) kg/m=250kg/d qiyaasta qiyaasta qiyaasta β Qadarka loo baahan yahay ee 2.5 tusaale ahaan waa: 2.5 × (27/31) × 250 kg/d=543.75 kg/ d, loo beddelay qiyaasta PAC: 543.75 kg/d ÷ 5.32% ~ 10220 kg/d, loo beddelay mugga PAC: 10220 kg/d ÷ 1.12 kg/L=9125 L/d

4. Qiyaasta ugu fiican ee chloride polyaluminum ee isticmaalka dhabta ah

Iyada oo ku saleysan xaaladda dhabta ah ee warshadda nadiifinta wasakhda, samee tijaabooyinka yar yar ee soo socda. Qaado 1ml oo ah reagent LPAC oo ku mili galaas mug leh oo 100ml ah. Qaado 6 500mL beaker, ku dar 500mL oo biyo ah si gooni ah, oo cabbir TP biyaha. Ku dar 40mg oo budada magnetic iyo 0.15% fiirsashada PAMO.3mL gaas kasta. Xisaabinta, xisaabi mugga dareeraha PAC ee ay tahay in lagu daro qiyaasaha kala duwan ee qiyaasaha. Ku dar dareeraha u dhigma digsi kasta oo walaaq. Ka dib markaad dejiso, qaado dusha sare oo cabbir biyaha TP. Qiimaha gaarka ah ayaa lagu muujiyay shaxda 1. Waxaa laga arki karaa shaxda 1 in marka isku-darka isku-darka β= saacadu markay tahay 5, wadarta fosfooraska ee dareeraha asal ahaan waxay gaadheen heerka koowaad A heerka dareeraha, iyo xoojinta dheecaanku wuxuu ahaa 0.5 mg/L. Sababtoo ah isku dhafka bayoolojiga iyo kiimikooyinka ka saarista fosfooraska ee geeddi-socodka ka saarista fosfooraska ee geedka, inta lagu jiro habka ka saarista fosfooraska noolaha, fosfooraska ururinta microorganisms waxay sii daayaan fosfooraska hoos yimaada xaaladaha anaerobic, nuugista fosfooraska ee xaaladaha aerobic, ka dibna ka sii daaya dhoobada. gaaritaanka qayb ka mid ah saamaynta ka saarista fosfooraska. Sidaa darteed, isku-darka isku-darka ah ee PAC β= Saacadda 5, waxay si adag u buuxin kartaa shuruudaha dareeraha. Qiyaasta u dhiganta ee PAC waxay ku saabsan tahay 21t/d.

3. Kooban

PAC waxay saameyn weyn ku leedahay ka saarida wadarta fosfooraska. Marka isku-dhafka qiyaasta ee warshadda daawaynta bulaacadaha ay tahay 5, waxay buuxin kartaa heerka dareeraha ee loo baahan yahay, iyo qiyaasta PAC ee la isticmaalay waa 21t/d. Sababtoo ah saamaynta saamaynta u dhiganta ee ka saarista wadarta fosfooraska, marka wadarta guud ee fosfooraska saamaynta leh ay duugowday, isku-darka isku-darka ah ayaa si habboon loo hagaajin karaa iyadoo lagu saleynayo tijaabadan yar-yar si loo buuxiyo heerarka dheecaanka dareeraha ah.