title: Denitrification of high nitrate wastewater in a cloth strip bioreactor with immobilized sludge.
abstract: Denitrification of synthetic high nitrate wastewater containing 40,000 ppm NO(3) (9,032 ppm NO(3)-N) was achieved using immobilized activated sludge in a column reactor. Active anoxic sludge adsorbed onto Terry cloth was used in the denitrification of high nitrate wastewater. The operational stability of the immobilized sludge system was studied both in a batch reactor and in a continuous reactor. The immobilized sludge showed complete degradation of different concentrations of NO(3)-N (1,129, 1,693, 3,387, 6,774, and 9,032 ppm) in a batch process. The reactors were successfully run for 90 days without any loss in activity. The immobilized cell process has yielded promising results in attaining high denitrifying efficiency.
authors: Nuclear Agriculture and Biotechnology Division, Bhabha Atomic Research Centre, Mumbai 400 085, Maharashtra, India. rushnair@gmail.com
authors: Rashmi R
authors: RR
authors: Nair
authors: Stanislaus F
authors: SF
authors: D'Souza
mesh_terms: D000268:Adhesiveness; D000327:Adsorption; D019149:Bioreactors; D058440:Denitrification; D009566:Nitrates / Q000302:isolation & purification* / Q000378:metabolism; D012722:Sewage / Q000737:chemistry*; D013784:Textiles; D062065:Wastewater / Q000737:chemistry*
chemical_list: D009566:Nitrates; D012722:Sewage; D062065:Wastewater