Details

Autor(en) / Beteiligte

• Liu, Ruiping
• Sun, Lihua
• Ju, Ran
• Wang, Hongjie
• Liu, Huijuan
• Gu, Junnong
• Li, Guibai

Titel

Effect of Hydrous Manganese Dioxide on the Treatment of Low-Turbidity Source Water: Plant-Scale Experience

Ist Teil von

• Journal of environmental engineering (New York, N.Y.), 2011-06, Vol.137 (6), p.481-486

Ort / Verlag

Reston, VA: American Society of Civil Engineers

Erscheinungsjahr

2011

Quelle

Business Source Ultimate

Beschreibungen/Notizen

• The effect of potassium permanganate (KMnO4) preoxidation on the treatment of low-turbidity reservoir water was investigated through two years of operational data in a large-scale drinking water treatment plant (DWTP). KMnO4 facilitated the removal of pollutants [e.g., turbidity and chemical oxygen demand (CODMn)] by different units such as clarification, sand filtration, and granular activated carbon (GAC) adsorption. Although the addition of KMnO4 increased the color and total Mn concentrations, the results of removal by clarification and filtration are promising. The average run length of anthracite filters decreased from 48 to 40.8 hours after the introduction of KMnO4 and exhibited a negative correlation with KMnO4 dosages (r2=0.6912). The hydrous manganese dioxide in situ formed (δMnO2) dominated in aiding coagulation and improving filtration to enhance pollutant removal in the KMnO4 preoxidation process, and these effects were achieved at the expense of more frequent backwashing of anthracite filters.