Flocculation - Aluminum sulphate vs Poly alumina chloride

ʻO ka Flocculation ke kaʻina hana e hoʻoneʻe ʻia ai nā mea i hoʻopaʻa ʻia i hoʻopaʻa ʻia i loko o ka wai paʻa. Loaʻa kēia ma ka hoʻohui ʻana i kahi coagulant i hoʻoili maikaʻi ʻia. ʻO ka hoʻopiʻi maikaʻi i loko o ka coagulant e hoʻokaʻawale i ka hoʻopiʻi maikaʻi ʻole i loko o ka wai (ʻo ia hoʻi, hoʻopau ia). Ke hoʻopau ʻia a hoʻokaʻawale ʻia nā ʻāpana, hiki ke kaʻina flocculation. Hoʻohui ʻia nā ʻāpana destabilized i loko o nā ʻāpana nui a nui a kaumaha lākou e hoʻonā i waho e ka sedimentation a i ʻole ka nui e paʻa i nā ʻōpū ea a lana.

I kēia lā, e nānā pono mākou i nā waiwai flocculation o ʻelua flocculants maʻamau: poly alumina chloride a me ka alumini sulfate.

Aluminum Sulfate: He ʻakika ka Aluminum Sulfate ma ke ʻano. ʻO ke kumu hana o ka alumini sulfate penei: hoʻopuka ka alumini sulfate i ka alumini hydroxide, Al(0H)3. He palena pH ka alumini hydroxides, ma luna aʻe ʻaʻole lākou e hydrolysis maikaʻi a i ʻole , hydrolyzated alumini hydroxides i hoʻopaʻa koke ʻia i ka pH kiʻekiʻe (ʻo ia hoʻi ka pH ma luna o 8.5), no laila pono e mālama pono ʻia ka pH hana e mālama iā ia i ka laulā o 5.8-8.5 . pono e lawa ka alkalinity i loko o ka wai i ka wā o ka flocculation e hōʻoia i ka hoʻokumu piha ʻana o ka hydroxide insoluble. Wehe i ka waihoʻoluʻu a me nā mea colloidal ma o ka hui ʻana o ka adsorption a me ka hydrolysis ma/i loko o ka metala hydroxides. No laila, ʻo ka puka aniani pH hana o ka alumini sulfate he 5.8-8.5, no laila he mea nui e hōʻoia i ka mana pH maikaʻi i ka wā o ka hoʻohana ʻana i ka alumini sulfate.

Polyaluminum chloride(PAC) ʻo ia kekahi o nā lāʻau lapaʻau wai e hoʻohana ʻia i kēia mau lā. Hoʻohana nui ʻia ia i ka wai inu a me ka mālama ʻana i ka wai ʻino ma muli o kona ʻano coagulation kiʻekiʻe a me ka ākea ākea o ka pH a me nā noi wela e hoʻohālikelike ʻia me nā mea hoʻōla wai ʻē aʻe. Loaʻa ka PAC i nā helu like ʻole me nā alumina alumina mai 28% a 30%. ʻAʻole wale ka noʻonoʻo alumina i ke koho ʻana i ka papa o ka PAC e hoʻohana ai.

Hiki ke noʻonoʻo ʻia ka PAC ma ke ʻano he coagulant pre-hydrolysis. ʻO nā puʻupuʻu alumini pre-hydrolysis he kiʻekiʻe kiʻekiʻe o ka hoʻopiʻi maikaʻi, kahi e hoʻonui ai ka PAC i ka cationic ma mua o ka alum.

Loaʻa iā PAC nā mea maikaʻi aʻe ma mua o ka alumini sulfate

1. Hana ia ma nā haʻahaʻa haʻahaʻa loa. E like me ke kānāwai o ke koʻokoʻo, ʻo ka nui o ka PAC ma kahi o hoʻokahi hapakolu o ka nui i koi ʻia no ka alum.

2. E waiho liʻiliʻi ka alumini i loko o ka wai i mālama ʻia

3. Hoʻoemi ia i ka lepo

4. Hana ia ma kahi ākea pH ākea

Nui nā ʻano o nā flocculant, a ʻelua wale nō o lākou e hoʻolauna nei i kēia ʻatikala. Ke koho ʻana i kahi coagulant, pono ʻoe e noʻonoʻo i ka maikaʻi o ka wai āu e mālama nei a me kāu kālā kālā ponoʻī. Manaʻo wau e loaʻa iā ʻoe kahi ʻike mālama wai maikaʻi. Ma ke ʻano he mea hoʻolako kemika mālama wai me 28 mau makahiki o ka ʻike. Hauʻoli wau i ka hoʻoponopono ʻana i kāu mau pilikia āpau (e pili ana i nā kemika mālama wai).