Chifukwa cha kusintha kwa zinthu zina, mtundu wa sludge womwe umayendetsedwa umakhala wopepuka, ukukulitsidwa, ndipo magwiridwe antchito amawonongeka, mtengo wa SVI ukupitilira kukwera, ndipo kulekanitsa kwamadzi kwamatope sikungathe kuchitidwa mu thanki yachiwiri ya sedimentation.Mlingo wa matope a thanki yachiwiri ya sedimentation ukupitilirabe kukwera, ndipo pamapeto pake matope amatayika, ndipo kuchuluka kwa MLSS mu thanki ya aeration kumachepetsedwa kwambiri, motero kuwononga matope mu ntchito yabwinobwino.Chodabwitsa ichi chimatchedwa sludge bulking.Kuchuluka kwa sludge ndi chinthu chodziwika bwino mu dongosolo la sludge process activated.
Njira ya sludge yomwe idakhazikitsidwa tsopano imagwiritsidwa ntchito kwambiri poyeretsa madzi oyipa.Njirayi yapeza zotsatira zabwino pakusamalira mitundu yambiri yamadzi otayira achilengedwe monga zimbudzi zamatauni, kupanga mapepala ndi utoto wamadzi onyansa, kusungira madzi onyansa komanso madzi onyansa amankhwala.Komabe, pali vuto lodziwika pamankhwala opangidwa ndi sludge, ndiko kuti, sludge ndi yosavuta kutupa panthawi yantchito.Sludge bulking makamaka anawagawa filamentous mabakiteriya mtundu sludge bulking ndi sanali filamentous mabakiteriya mtundu sludge bulking, ndipo pali zifukwa zambiri mapangidwe ake.Kuvulaza kwa sludge bulking ndizovuta kwambiri, zikachitika, zimakhala zovuta kuzilamulira, ndipo nthawi yochira ndi yayitali.Ngati njira zowongolera sizitengedwa munthawi yake, kutayika kwa matope kumatha kuchitika, kuwononga kwambiri magwiridwe antchito a thanki ya aeration, zomwe zimapangitsa kugwa kwa dongosolo lonse lamankhwala.
Kuonjezera calcium kolorayidi kungalepheretse kukula kwa filamentous mabakiteriya, amene amathandiza mapangidwe bakiteriya micelles, ndi kusintha kuthetsa ntchito ya sludge.Calcium chloride imawola ndikutulutsa ayoni a chloride akasungunuka m'madzi.Ma chloride ions ali ndi njira yotseketsa komanso yophera tizilombo m'madzi, yomwe imatha kupha gawo la mabakiteriya a filamentous ndikuletsa kutupa kwamatope komwe kumachitika chifukwa cha mabakiteriya a filamentous.Pambuyo poyimitsa kuwonjezera kwa chlorine, ma chloride ions amathanso kukhala m'madzi kwa nthawi yayitali, ndipo mabakiteriya a filamentous samakula mopitilira muyeso kwakanthawi kochepa, ndipo tizilombo titha kupangabe floc wandiweyani, zomwe zikuwonetsanso kuti kuwonjezera calcium kolorayidi imatha kulepheretsa kukula kwa mabakiteriya a filamentous ndipo imakhala ndi zotsatira zabwino pakuthana ndi kutupa kwa sludge.
Kuonjezera calcium chloride kumatha kuletsa kutupa kwamatope mwachangu komanso moyenera, ndipo SVI ya sludge yoyendetsedwa imatha kuchepetsedwa mwachangu.SVI inatsika kuchoka pa 309.5mL/g kufika pa 67.1mL/g atawonjezera calcium chloride.Popanda kuwonjezera calcium chloride, SVI ya sludge yoyendetsedwa imathanso kuchepetsedwa posintha mawonekedwe opangira, koma kuchepetsako kumachepera.Kuonjezera calcium chloride sikukhala ndi zotsatira zodziwikiratu pakuchotsa COD, ndipo kuchuluka kwa COD pakuwonjezera calcium chloride kumatsika ndi 2% kuposa kusawonjezera calcium chloride.
Nthawi yotumiza: Jan-11-2024
