Phosphorus ee dhalinyarada carruurtida waxay ku jirin shacab dheer, oo dhintay phosphorus ee la sameyn doono macluumaad u hore.

1, Xiriiradda Fosfor

Haddii aad ugu sameeyo, caqabadaha ee ku jirin phosphorus waxaa la mid ahayd inkaas oo ku jirin biological phosphorus removal, chemical phosphorus removal, iyo xogta badbaadaha biological iyo chemical. Biological phosphorus removal waxay noqon doontaa caqabi ah ee dhan, laakiin haddii ku jiraan qaabka taajada iyo phosphorus removal process ku saabsan ayaa ka mid ahayd carbon source iyo qofka mudaaqa, si aad ku jirto TP concentration ee outflow ah oo aan uga soo jeedo daqiiqadda dibadda. Halkaas, haddii biological phosphorus removal ma ogolaanto daqiiqadda dibadda, wuxuu yimid in chemical agents ku yidhi carruurta ah phosphorus removal. Chemical phosphorus removal waa in laga yaabo metal salts ee ku jirin wastahda looga tagaystaystada (sida phosphates) ee ku jirin wastahda, si uu ku horjeedso granular iyo substances ee la isku diyaarayo. Caqabadaha ee ku jirin chemical phosphorus removal waxaa lagu yeero metal salt agents iyo calcium hydroxide. Haddii u baahan yihiin caqabadaha, metal salt agents ee ku jirin phosphorus precipitation waxaa lagu yeero Fe salts, Al salts. Markaasaa, macluumaadkii nolosha, waxaan ku yidhi polyaluminum chloride (PAC) si goobaha ugu muuqata iyo ku jiran caqabadaha ee ku jirin wastahda.

2. Kasoosa polyaluminum chloride waxaa ka mid ah inta badan ee daryeelka xiriirka malmalooda

1. Dhaqanka

Waxbarashada Wenzhou Xipian ee daryeelka malmalooda ay siiyey talo kale ee 250,000 m3/d. Proseska daryeelka malmalooda ee qoraalka kasta ee shaqsiinta waa "CAST-MBBR+daacadkasiga magneetka+qarabka filterka gudbinaha fibeerka"; Proseska daryeelka malmalooda ee qoraalka labaad ee shaqsiinta waxaa lagu yeedhay in uu ku jiro tank biyoobiyaal multi-stage A/0 (A2/O la xiriira), tankka daacadka dhexe-geedka carruurta carruurtida, tank magneetka daacadka, iyo qarabka fibeerka si aad ugu yaraan adsorption colloid iyo dad weyn ee ku caddeysaan.

A1Cl+KPO → AlPO ↓+3KCl (1)

Al+30H → Al (OH) ↓ (2)

3. Fiqiinta dosigga polyaluminum chloride

Ku saabsan Wenzhou Xipian Sewage Treatment Plant, jiradda kuwaas oo dhexeeya badbadiyaha carruurta ahayd 250000 m3/d, oo concentration-ka TP ee carruurta ahayd 1.5 mg/L. Oo aan ugu yaraan standard-ka A adeegga ah ee carruurta luqada, concentration-ka TP ee outflow ayaa la mid ahayd kula duusan 0.5 mg/L. PAC reagent waxaa isku dooneyeysaa labarka oo A1 content-ka uu ka mid ahayd 5.32%. Density-ka PAC ayaa 1.12kg/L. Haddii chemical precipitation ka soo diriray phosphorus removal, 1mol aluminum wuxuu sameeyey 1mol phosphorus, si aad ugu yarantahay in removal-ka 1g phosphorus u baahan yihiin 0.87g aluminum. Fartaan, reaction ayaa sida maanta aan ku jiro 100%. Masalan, metal ions iyo OH waxaa lagu talagalayn doonaa hydroxides. Kuna fiiri kartaa dosing-ka kale oo la mid ahayd standard-ka carruurta ahayd. Dajalmarka ayaa sugayaa addition coefficient β degmada addition coefficient ayaa la talagalayn doonaa factor-cadooda, oo dhan, β= 1 haddii optimal conditions ahayn; haddii conditions kale ahayn, β= 2 to 3 ama waxba caddeed, oo ku yaal dosing tests kuwaas oo qoray dosing.

P load=25000m/d × (0.0015-0.0005) kg/m=250kg/d dosing coefficient β Alkaanti la'eenka Al ee ugu yaraan 2.5 si toos ah waxaa: 2.5 × (27/31) × 250 kg/d=543.75 kg/d, ku saabsan PAC dosage: 543.75 kg/d ÷ 5.32%~10220 kg/d, ku saabsan PAC volume: 10220 kg/d ÷ 1.12 kg/L=9125 L/d

4. Dosage optimaalka polyaluminum chloride ka soo diriraystayii

Ismaha dhibaatooyinka farsha badbaadada, ku jiraan inaad ku sameeyo waxbarashada xiriir ah ee ku jiraa. Kaliya 1mL oo reejentka LPAC ugu baahan iyo ku saarso in ay leedahay 100mL flask ee qaybta. Kaliya 6 beaker ee 500mL, siin 500mL maalmeed oo ka mid ah iyo soo diriro TP ee maalmooda. Siin 40mg qaaxda magneetka iyo PAMO ee 0.15% caafimaadka iyo 3mL kooxka ah ee ku jiraa haddii ugu yaraan beaker. Waxbarashada ku jiraan, soo socda volume ee dilaynta PAC ee la sheegayo wakhtiga ah ee dosing coefficients. Siin dilaynka ah ee ugu yaraan haddii ugu yaraan beaker iyo stirrer. Markii aan ugaadi doonaa, soo diriro supernatant iyo soo diriro TP ee maalmooda. Qoraalka ku jiraan waxbarashada loogu talagalay Table 1. Haddii u fahmo Table 1, markaasaa coefficient ee isku soo galo β= Saac 5, phosphorus ee outflow waxaa lagu yeero standard ee outflow ee la xiriira A, iyo concentration ee outflow waxaa 0.5mg/L. Dhibaatooyinka phosphorus ee ku jiraa plant ee badbaadada, waxaa lagu talagalay bio iyo chemical phosphorus removal processes. Dhibaatooyinka biological phosphorus removal, microorganisms ee ku jiraa anaerobic conditions waxaan ugu yaraan inay farsha badbaadiso phosphorus, iyo ugu yaraan inay absahay phosphorus under aerobic conditions, sidaas daraaddeed ayuu ku cadayno phosphorus ee ku jiraa sludge, sidaas daraaddeed ayaa la yeero partial phosphorus removal effect. Sidaas daraaddeed, addition coefficient ee PAC β= Saac 5, waxaa la talagalay outflow requirements ee ku jiraa stable. Dosage ee PAC ee la talagalay waxaa about 21t/d.

3, Dhammaad

PAC waxaa u leeyahay qof kasta oo ah ku jiraan badbaadada fosiyaasha. Haddii coecientka dosiiska ee gaar ah ee dhalinyaraha fosiyaashaha ku yaal 5, waxay ka socda midkooda ee la xiriira, iyo dosiiska PAC ayaa 21t/d. Kuwaas oo badbaadada fosiyaasha ah ku jiraan macluumaadka kale ee badbaadada fosiyaasha ah, haddii badbaadada fosiyaasha ah ee macluumaadka kale ee ku jiraan ku yaal, coecientka lacagta ayaa ka leeyahay inuu sameeyo haddii lagu yeero bogga sidaas daraaddeedka si aan ugu yaraan midkooda ee la xiriira.