title: Nitrophenol removal by simultaneous nitrification denitrification (SND) using T. pantotropha in sequencing batch reactors (SBR).
abstract: Nitrophenol removal was assessed using four identical lab scale sequencing batch reactors R (background control), R1 (4-nitrophenol i.e. 4-NP), R2 (2,4-dinitrophenol i.e. 2,4-DNP), and R3 (2,4,6-trinitrophenol i.e. 2,4,6-TNP). In the present study, the SND based SBR system was used to carry out total nitrogen removal at reduced aeration (DO=2mg/L) using a specifically designed single sludge biomass containing Thiosphaera pantotropha. The concentration of each of the nitrophenols was gradually increased from 2.5 to 200mg/L during acclimation. The nitrophenols were used as the sole source of nitrogen during study. A synthetic feed was designed to direct SND in the bioreactors. It was observed that overall removal for 4-NP was 98% and for 2,4-DNP and 2,4,6 TNP, removals varied between 83% and 84%. The COD removal for 4-NP was 99% and for 2,4-DNP and 2,4,6-TNP was 97-98% during acclimation. Total nitrogen and nitrophenol removals were achieved via SND.
authors.affiliation: Center for Environmental Science and Engineering, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India. pradnyakulkarni@iitb.ac.in
authors.forename: Pradnya
authors.initials: P
authors.lastname: Kulkarni
mesh_terms: D061249:Batch Cell Culture Techniques / Q000295:instrumentation*; D001673:Biodegradation, Environmental; D019149:Bioreactors / Q000382:microbiology*; D058440:Denitrification; D004867:Equipment Design; D058465:Nitrification; D009596:Nitrophenols / Q000302:isolation & purification* / Q000378:metabolism*; D042084:Paracoccus pantotrophus / Q000378:metabolism*; D062065:Wastewater / Q000737:chemistry / Q000382:microbiology*; D018508:Water Purification / Q000295:instrumentation*
chemical_list: D009596:Nitrophenols; D062065:Wastewater