Umphumela wokusetshenziswa kwe-calcium chloride ukulawula ukunqwabelana kodaka
Ngenxa yokushintsha kwezinye izici, ikhwalithi ye-sludge esebenzayo iba lula, ikhuliswe, futhi ukusebenza kokuhlala kuyawohloka, inani le-SVI liyaqhubeka nokukhuphuka, futhi ukuhlukaniswa okuvamile kwamanzi odaka akukwazi ukwenziwa ethangini le-sedimentation yesibili. Izinga le-sludge lethangi le-sedimentation yesibili liyaqhubeka nokukhuphuka, futhi ekugcineni i-sludge iyalahleka, futhi ukuhlushwa kwe-MLSS ethangini lokungenisa umoya kuncipha kakhulu, ngaleyo ndlela kubhubhise i-sludge ekusebenzeni okuvamile kwenqubo. Lesi simo sibizwa ngokuthi i-sludge bulking. I-sludge bulking iyinto evamile engajwayelekile ohlelweni lwenqubo ye-sludge olusebenzayo.
Inqubo yodaka olusebenzayo manje isetshenziswa kabanzi ekuphatheni amanzi angcolile. Le ndlela ithole imiphumela emihle ekwelapheni izinhlobo eziningi zamanzi angcolile angokwemvelo njengendle kamasipala, ukwenza amaphepha nokudaya amanzi angcolile, ukunakekela amanzi angcolile kanye namanzi angcolile amakhemikhali. Kodwa-ke, kunenkinga evamile ekwelashweni kodaka olusebenzayo, okungukuthi, i-daka kulula ukuyivuvukala ngesikhathi sokusebenza. Udaka oluhlanganisiwe luhlukaniswe kakhulu ngodaka oluhlanganisiwe lohlobo lwebhaktheriya olunefilamentous kanye nodaka oluhlanganisiwe lohlobo lwebhaktheriya olungenafilamentous, futhi kunezizathu eziningi zokwakheka kwalo. Umonakalo wodaka oluhlanganisiwe unzima kakhulu, uma seluvele, kunzima ukululawula, futhi isikhathi sokululama side. Uma izinyathelo zokulawula zingathathwanga ngesikhathi, ukulahleka kodaka kungase kwenzeke, okulimaza kakhulu ukusebenza kwethangi lokungenisa umoya, okuholela ekuweni kohlelo lonke lokwelapha.
Ukwengeza i-calcium chloride kungavimbela ukukhula kwamabhaktheriya ane-filamentous, okusiza ekwakhekeni kwama-microcelles ebhaktheriya, futhi kuthuthukise ukusebenza kokuzinza kwe-sludge. I-calcium chloride izobola futhi ikhiqize ama-ion e-chloride ngemva kokuncibilika emanzini. Ama-ion e-chloride anomphumela wokubulala amagciwane kanye nokubulala amagciwane emanzini, okungabulala ingxenye yamabhaktheriya ane-filamentous futhi kuvimbele ukuvuvukala kwe-sludge okubangelwa amagciwane ane-filamentous. Ngemva kokumisa ukwengeza i-chlorine, ama-ion e-chloride angahlala emanzini isikhathi eside, futhi amagciwane ane-filamentous awakhuli ngokweqile esikhathini esifushane, futhi amagciwane asengakha i-floc evamile eningi, okubonisa nokuthi ukwengeza i-calcium chloride kungavimbela ukukhula kwamabhaktheriya ane-filamentous futhi kube nomphumela omuhle ekuxazululeni ukuvuvukala kwe-sludge.
Ukwengeza i-calcium chloride kungalawula ukuvuvukala kodaka ngokushesha nangendlela ephumelelayo, kanti i-SVI yodaka olusebenzayo ingancishiswa ngokushesha. I-SVI yehle isuka ku-309.5mL/g yaya ku-67.1mL/g ngemva kokufaka i-calcium chloride. Ngaphandle kokufaka i-calcium chloride, i-SVI yodaka olusebenzayo nayo ingancishiswa ngokushintsha indlela yokusebenza, kodwa izinga lokunciphisa lihamba kancane. Ukwengeza i-calcium chloride akunawo umphumela ocacile esilinganisweni sokususwa kwe-COD, futhi izinga lokususwa kwe-COD lokufaka i-calcium chloride liphansi ngo-2% kuphela kunelokungafaki i-calcium chloride.