Flocculation - Aluminom sulfate vs Poly aluminum chloride

Flucculation bụ usoro nke na-emebi ụmụ irighiri ihe ndị akwụsiri n'ụzọ na-adịghị mma dị na nkwusioru kwụsiri ike na mmiri. A na-enweta nke a site n'ịgbakwunye coagulant nwere ụgwọ dị mma. Ụgwọ dị mma na coagulant na-ewepụ ụgwọ ọjọọ dị na mmiri (ya bụ na-emebi ya). Ozugbo ụmụ irighiri ihe na-emebi ma ọ bụ na-ewepụ ya, usoro flocculation na-eme. The destabilized ahụ na-ejikọta n'ime ihe ndị buru ibu ma buru ibu ruo mgbe ha dị arọ iji dozie site na sedimentation ma ọ bụ buru ibu iji jide ikuku ikuku na ise n'elu.

Taa, anyị ga-elebakwu anya na njirimara flocculants abụọ: poly aluminum chloride na aluminum sulfate.

Aluminom sulfate: Aluminom sulfate bụ acidic na okike. Ụkpụrụ ọrụ nke aluminum sulfate bụ ndị a: aluminum sulfate na-emepụta aluminum hydroxide, Al (0H) 3. Aluminom hydroxides nwere oke pH dị ntakịrị, n'elu nke ha agaghị eme nke ọma hydrolysis ma ọ bụ , hydrolyzated aluminum hydroxides biri ngwa ngwa na pH dị elu (ie pH n'elu 8.5), ya mere, a ghaghị iji nlezianya chịkwaa pH na-arụ ọrụ iji debe ya na nso nke 5.8-8.5. . alkalinity dị n'ime mmiri ga-ezuru oke n'oge usoro flocculation iji hụ na hydroxide na-enweghị ike ime ka etolite n'ụzọ zuru oke ma mee ka ọ daa. Na-ewepu agba na ihe colloidal site na nchikota nke adsorption na hydrolysis on / n'ime metal hydroxides. Ya mere, windo pH na-arụ ọrụ nke aluminom sulfate bụ nke ọma 5.8-8.5, ya mere ọ dị ezigbo mkpa iji hụ na njikwa pH dị mma n'oge usoro mgbe ị na-eji aluminum sulfate.

Polyaluminom chloride(PAC) bụ otu n'ime kemịkalụ ọgwụgwọ mmiri kacha arụ ọrụ taa. A na-eji ya eme ihe n'ọtụtụ ebe na mmiri ọṅụṅụ na mmiri na-ekpo ọkụ n'ihi na ọ na-arụ ọrụ nke ọma na coagulation dị elu na ngwa ngwa pH na okpomọkụ ma e jiri ya tụnyere mmiri ọgwụ ndị ọzọ. PAC dị n'ọtụtụ ọkwa dị iche iche yana ntinye alumina sitere na 28% ruo 30%. Ntinye uche nke alumina abụghị naanị ihe a ga-atụle mgbe ị na-ahọrọ ọkwa PAC nke ị ga-eji.

Enwere ike iwere PAC dị ka coagulant tupu hydrolysis. Ụyọkọ aluminom tupu-hydrolysis nwere njupụta ụgwọ dị oke elu, nke na-eme PAC karịa cationic karịa alum.

PAC nwere uru ndị a karịa aluminum sulfate

1. Ọ na-arụ ọrụ na ọtụtụ ala ịta. Dị ka usoro isi mkpịsị aka, dose PAC bụ ihe dịka otu ụzọ n'ụzọ atọ nke dose achọrọ maka alum.

2. Ọ na-ahapụ obere aluminum fọdụrụnụ na mmiri a na-edozi

3. Ọ na-emepụta obere sludge

4. Ọ na-arụ ọrụ n'elu a mbara pH nso

Enwere ọtụtụ ụdị flocculants, na isiokwu a na-ewebata naanị abụọ n'ime ha. Mgbe ị na-ahọrọ coagulant, ị kwesịrị ịtụle àgwà mmiri ị na-agwọ na mmefu ego nke gị. Enwere m olileanya na ị nwere ezigbo ahụmịhe ọgwụgwọ mmiri. Dị ka onye na-eweta mmiri ọgwụ mmiri na ahụmahụ 28 afọ. Enwere m obi ụtọ idozi nsogbu gị niile (banyere mmiri ọgwụ mmiri).