DOI: 10.1016/j.watres.2017.12.061
Scopus记录号: 2-s2.0-85039993181
论文题名: Remediation of incomplete nitrification and capacity increase of biofilters at different drinking water treatment plants through copper dosing
作者: Wagner F.B. ; Nielsen P.B. ; Boe-Hansen R. ; Albrechtsen H.-J.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 132 起始页码: 42
结束页码: 51
语种: 英语
英文关键词: Ammonium
; Biological water treatment
; Copper deficiency
; Granular media filtration
; Groundwater
; Nutrient limitations
Scopus关键词: Biofilters
; Biological water treatment
; Chemicals removal (water treatment)
; Copper oxides
; Effluent treatment
; Effluents
; Granular materials
; Groundwater
; Iron oxides
; Nitration
; Nitrification
; Potable water
; Water filtration
; Water quality
; Water treatment plants
; Ammonium
; Effluent concentrations
; Granular media filters
; Granular media filtration
; Groundwater treatment
; Nitrite accumulation
; Nutrient limitations
; Water quality standard
; Loading
; ammonium derivative
; copper
; drinking water
; drinking water
; nitric acid derivative
; ammonium
; biofiltration
; copper
; dose-response relationship
; drinking water
; granular medium
; nitrification
; oxidation
; pollutant removal
; sampling
; water quality
; water treatment
; water treatment plant
; Article
; bioremediation
; concentration (parameters)
; controlled study
; effluent
; heavy metal removal
; nitrification
; oxidation
; priority journal
; water standard
; water treatment
; chemistry
; devices
; filtration
; metabolism
; oxidation reduction reaction
; procedures
; water management
; water pollutant
; water quality
; Ammonium Compounds
; Copper
; Drinking Water
; Filtration
; Nitrates
; Nitrification
; Oxidation-Reduction
; Water Pollutants, Chemical
; Water Purification
; Water Quality
英文摘要: Drinking water treatment plants based on groundwater may suffer from incomplete ammonium removal, which deteriorates drinking water quality and constrains water utilities in the operation of their plants. Ammonium is normally removed through nitrification in biological granular media filters, and recent studies have demonstrated that dosing of copper can stimulate the removal of ammonium. Here, we investigated if copper dosing could generically improve ammonium removal of biofilters, at treatment plants with different characteristics. Copper was dosed at ≤1.5 μg Cu/L to biofilters at 10 groundwater treatment plants, all of which had displayed several years of incomplete nitrification. Plants exceeded the Danish national water quality standard of 0.05 mg NH4 +/L by a factor of 2–12. Within only 2-3 weeks of dosing, ammonium removal rates increased significantly (up to 150%). Nitrification was fully established, with ammonium effluent concentrations of <0.01 mg NH4 +-N/L at most plants, regardless of the differences in raw water chemistry, ammonium loading rates, filter design and operation, or treatment plant configuration. However, for filters without primary filtration, it took longer time to reach complete ammonium removal than for filters receiving prefiltered water, likely due to sorption of copper to iron oxides, at plants without prefiltration. With complete ammonium removal, we subjected two plants to short-term loading rate upshifts, to examine the filters' ability to cope with loading rate variations. After 2 months of dosing and an average loading rate of 1.0 g NH4 +-N/m3 filter material/h, the loading rate was upshifted by 50%. Yet, a filter managed to completely remove all the influent ammonium, showing that with copper dosing the filter had extra capacity to remove ammonium even beyond its normal loading rates. Depth sampling revealed that the ammonium removal rate of the filter's upper 10 cm increased more than 7-fold from 0.67 to 4.90 g NH4 +-N/m3/h, and that nitrite produced from increased ammonium oxidation was completely oxidized further to nitrate. Hence, no problems with nitrite accumulation or breakthrough occurred. Overall, copper dosing generically enhanced nitrification efficiency and allowed a range of quite different plants to meet water quality standards, even at increased loading rates. The capacity increase is highly relevant in practice, as it makes filters more robust towards sudden ammonium loading rate variations. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112982
Appears in Collections: 气候减缓与适应
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作者单位: Department of Environmental Engineering, Technical University of Denmark, Bygningstorvet, Bygning 115, Kgs, Lyngby, 2800, Denmark; Krüger A/S, Gladsaxevej 363, Søborg, 2860, Denmark
Recommended Citation:
Wagner F.B.,Nielsen P.B.,Boe-Hansen R.,et al. Remediation of incomplete nitrification and capacity increase of biofilters at different drinking water treatment plants through copper dosing[J]. Water Research,2018-01-01,132