Direct Biofiltration for Manganese Removal from Surface Water

作者：Granger Heather C; Stoddart Amina K; Gagnon Graham A^*

来源：Journal of Environmental Engineering (United States), 2014, 140(4): 04014006.

DOI：10.1061/(ASCE)EE.1943-7870.0000819

• Biological processes
• Filtration
• Drinking water
• Water treatment
• Manganese
• Organic matter
• Surface water
• Biological processes
• Drinking water treatment
• Manganese
• Organic matter
• Surface water

Research has shown biological filtration to be a successful treatment for the removal of manganese (Mn) from groundwater and surface water. In this study, bench-scale direct biofiltration was used to remove Mn and dissolved organic carbon (DOC) from a pH 6 surface water source in Halifax, Nova Scotia, Canada. Three factors were examined for their effects on Mn and DOC removal: media type (granular activated carbon and anthracite), pH (6 and 9-11), and nutrient enhancement with phosphorus (P; 20 and 200g/L). pH was a significant factor in Mn removal (=0.05). The P-enhanced pH 6 biofilters for both media obtained an average 91% Mn removal; the P-enhanced pH 9-11 filters for both media achieved an average 70% Mn removal. An average of 23% DOC removal was achieved with P enhancement, compared to 12% DOC removal without P enhancement. Mn was likely removed by biological oxidation and biogenic oxide adsorption. These results show that direct biofiltration of raw surface water at pH 6 can remove Mn to below the 50g/L guideline from an influent Mn concentration of over 1mg/L.

• 出版日期2014-4-1