Survey on water treatment efficiency for the Sa Dec river - Dong Thap with PAC combined activated carbon
2022
Nguyễn Thị Thanh Tuyền | Trần Thái Hà | Hồ Trâm Quốc Triệu | Đặng Thị Đoan Dung | Văn Từ Nhật Huy
The study was conducted to evaluate and compare the water treatment efficiency of the surface water in Tien River in Sa Dec city - Dong Thap province by two treatment methods: PAC + Polymer and PAC + Polymer + activated carbon. Water treatment efficiency is evaluated through four water quality criteria: Total Suspended Solids (TSS), Chemical Oxygen Demand (COD), ammonium (NH4+), turbidity. Research results show the effectiveness of using PAC and Polymer to treat turbidity, COD, TSS. COD removal efficiency reached 54.54%, ammonium content decreased to 0.15mg/L, turbidity was reduced to 0.2NTU. Adding activated carbon to the reaction further increases the COD removal efficiency, with efficiency up to 76.79%. In this study, with turbidity and TSS criteria, the use of coagulation - flocculation with activated carbon always achieved good results, the water after treatment reached QCVN 01 - 1:2018/BYT (Bộ Y tế, 2018). However, with COD and ammonium criteria, it is still not possible to ensure that the treated water reaches the allowable value specified in QCVN 01 - 1:2018/BYT (Bộ Y tế, 2018). Though, the research results show that the use of activated carbon enhances the treatment efficiency, and has the potential to lead to a solution that uses less PAC chemicals and still gives the same treatment efficiency.
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