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2/6: samnguyen@ - xin hoi Viet Linh lam sao giam hoac tang do pH lay nuoc tu gieng
nuoc len cho ao, ho, xin cam on nhieu

Doi voi nuoc gieng, khi hut len phai bom vao ao tru-lang (qua he thong gian
mua de oxy hoa sat), kiem tra cac thong so ky thuat, dung thuoc tim de khu
bot sat va H2S co trong nuoc ngam. Tai ao tru-lang ta co the nang pH bang
voi CaO hoac      Ca(OH)2, neu truong hop pH cao: nho hon 8 khong can phai
giam pH nhung can kiem tra do kiem; tren 8
moi phai su ly, truong hop tren 8 theo chung toi la khong co loi the khi xu
ly de giam pH (co the xu ly bang 1 so acid nhe nhu acid acetic, acid
citric...

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