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- W4380079500 abstract "Abstract Limitations of the operation of down-flow sand filters were investigated without and with dosages of methanol, ethanol, or acetate for denitrification and dosages of ferrous sulphate to remove phosphorous. The dynamic head loss was developed due to clogging by suspended solids (SS) that originated from the secondary sedimentation tanks including sludge overflow and from SS in primary settled wastewater that bypassed the biological step. The dynamic head loss was also developed from clogging by gas bubbles formed during denitrification, not by the SS produced from cell growth. The dynamic head loss in sand filters after 24 h operation without and with denitrification increased by 0.9–1.3 and 2.3–2.4 mH2O, respectively. The total time of operation was prolonged by 50% after one water bumping, by 75% after two bumpings, and by 85% after six or seven bumpings. Operational time for filter cycles was prolonged by 4–5 h by one bumping in the full-scale and pilot-scale filters. The time of operation depended on hydraulic loading. With a carbon source dosage, one filter cycle lasted 20–40 h at 10 m/h and 60 h at 5 m/h in pilot-scale filters, and 15–27 h at 3.3 m/h in full-scale filters." @default.
- W4380079500 created "2023-06-10" @default.
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- W4380079500 date "2023-06-08" @default.
- W4380079500 modified "2023-09-30" @default.
- W4380079500 title "Dynamic head loss in pilot- and full-scale wastewater sand filtration with phosphorus removal, denitrification, and associated bumping" @default.
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- W4380079500 doi "https://doi.org/10.2166/wpt.2023.090" @default.
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