Mmetụta ojiji nke calcium chloride iji chịkwaa mmụba sludge
N'ihi mgbanwe nke ihe ụfọdụ, àgwà sludge a na-arụ ọrụ na-aghọ ìhè, gbasaa, arụmọrụ nke idozi ahụ na-aka njọ, uru SVI na-aga n'ihu na-arị elu, enweghịkwa ike ime nkewa mmiri apịtị nkịtị na tankị sedimentation nke abụọ. Ọkwa sludge nke tankị sedimentation nke abụọ na-aga n'ihu na-arị elu, n'ikpeazụkwa, sludge ahụ na-efunahụ, a na-ebelatakwa mkpokọta MLSS na tankị aeration nke ukwuu, si otú a na-ebibi sludge ahụ n'ọrụ usoro nkịtị. A na-akpọ ihe a sludge bulking. Sludge bulking bụ ihe a na-ahụkarị na sistemụ usoro sludge a na-arụ ọrụ.
A na-ejikarị usoro sludge eme ihe ugbu a n'ịgwọ mmiri mkpofu. Usoro a enwetala ezigbo nsonaazụ n'ịgwọ ọtụtụ ụdị mmiri mkpofu organic dịka nsị obodo, ime akwụkwọ na ịcha mmiri mkpofu, inye mmiri mkpofu na mmiri mkpofu kemịkalụ. Agbanyeghị, enwere nsogbu a na-ahụkarị na ọgwụgwọ sludge emelitere, ya bụ, sludge dị mfe ịza n'oge a na-arụ ọrụ. A na-ekewa sludge bulking n'ụzọ bụ isi n'ụdị nje bacteria filamentous, sludge bulking na nje bacteria na-abụghị filamentous, enwere ọtụtụ ihe kpatara ya. Mmebi nke sludge bulking dị oke njọ, ozugbo ọ mere, ọ na-esiri ike ijikwa, oge mgbake na-adịkwa ogologo. Ọ bụrụ na ewereghị usoro njikwa n'oge, mfu sludge nwere ike ime, nke na-emebi ọrụ nke tankị ikuku, nke na-ebute ọdịda nke usoro ọgwụgwọ dum.
Ịtinye calcium chloride nwere ike igbochi uto nke nje bacteria filamentous, nke na-enyere aka ịmepụta micelles nje bacteria, ma melite arụmọrụ nke sludge. Calcium chloride ga-ere ere ma mepụta ion chloride mgbe agbazere na mmiri. ion chloride nwere mmetụta mgbochi nje na nje bacteria na mmiri, nke nwere ike igbu akụkụ nke nje bacteria filamentous ma gbochie mbufụt nke nje bacteria filamentous kpatara. Mgbe ịkwụsị itinye chlorine, ion chloride nwekwara ike ịnọ n'ime mmiri ruo ogologo oge, nje bacteria filamentous anaghị eto nke ukwuu n'oge dị mkpirikpi, nje bacteria ka nwekwara ike ịmepụta floc nkịtị dị oke njọ, nke na-egosikwa na mgbakwunye nke calcium chloride nwere ike igbochi uto nke nje bacteria filamentous ma nwee mmetụta dị mma na idozi ọzịza sludge.
Ịtinye calcium chloride nwere ike ijikwa ọzịza sludge ngwa ngwa na nke ọma, a pụkwara ibelata SVI nke sludge activated ngwa ngwa. SVI belatara site na 309.5mL/g ruo 67.1mL/g mgbe etinyere calcium chloride. Na-etinyeghị calcium chloride, enwere ike ibelata SVI nke sludge activated site na ịgbanwe ụdị ọrụ, mana ọnụego mbelata ahụ na-ebelata nwayọ. Ịtinye calcium chloride enweghị mmetụta doro anya na ọnụego mwepụ COD, ọnụego mwepụ COD nke itinye calcium chloride dị naanị 2% ala karịa nke enweghị itinye calcium chloride.