Denitrification of a nitrate-rich synthetic wastewater using various wood-based media materials.
This laboratory study examined the use of various wood materials as a carbon source in horizontal flow filters to denitrify nitrate-nitrogen (NO3-N) from a synthetic wastewater. The filter materials were: sawdust (Pinus radiata), sawdust and soil, sawdust and sand, and medium-chip wood chippings and sand. Two influent concentrations of NO3-N, 200 mg L(-1) and 60 mg L(-1), loaded at 2.9 to 19.4 mg NO3-N kg(-1) mixture, were used. The horizontal flow filter with a wood chippings/sand mixture and an influent NO3-N concentration of 60 mg L(-1), which operated over a study duration of 166 days, performed best, yielding a 97% reduction in NO3-N at steady-state conditions.
Healy
Mark Gerard
MG
Department of Civil Engineering, National University of Ireland, Galway, Ireland. mark.healy@nuigalway.ie
Rodgers
Michael
M
Mulqueen
John
J
D005374:Filtration; D009566:Nitrates / Q000737:chemistry / Q000302:isolation & purification* / Q000378:metabolism; D009584:Nitrogen / Q000737:chemistry / Q000302:isolation & purification / Q000378:metabolism; D012722:Sewage; D013997:Time Factors; D014865:Waste Disposal, Fluid / Q000379:methods*; D014872:Water Movements; D018508:Water Purification / Q000379:methods*; D014934:Wood
D009566:Nitrates; D012722:Sewage; D009584:Nitrogen