title: Treatment of coke wastewater in a sequential batch reactor (SBR) at pilot plant scale.
abstract: Coke wastewater is a highly toxic industrial effluent which is usually treated by a combination of physico-chemical and biological treatments. With the aim of completing prior studies carried out in CSTR, in this work we studied the treatment of coke wastewater in a pilot plant equipped with a 400 L stripping tank, a 350 L neutralization/homogenization tank and a 6 m high 1500 L sequential batch reactor (SBR), controlled by a PLC. Ammonia stripping efficiencies of 96% were obtained for HRT of 66 h. The biological treatment in the SBR led to removal efficiencies of 85% COD, 98% thiocyanate and 99% phenols for HRT of 115 h. Final concentrations in the effluent of 1.8 mg phenols/L, 5.4 mg SCN/L, 206 mg COD/L and 78 mg N-NH(4)(+)/L were obtained.
authors.affiliation: Department of Chemical and Environmental Engineering, Higher Polytechnic School of Engineering, University of Oviedo, 33204 Gijón, Spain. emara@uniovi.es
authors.forename: E
authors.initials: E
authors.lastname: Marañón
authors.forename: I
authors.initials: I
authors.lastname: Vázquez
authors.forename: J
authors.initials: J
authors.lastname: Rodríguez
authors.forename: L
authors.initials: L
authors.lastname: Castrillón
authors.forename: Y
authors.initials: Y
authors.lastname: Fernández
authors.forename: H
authors.initials: H
authors.lastname: López
mesh_terms: D000327:Adsorption; D000641:Ammonia; D001673:Biodegradation, Environmental; D019149:Bioreactors; D001709:Biotechnology / Q000379:methods*; D003077:Coke / Q000032:analysis*; D004867:Equipment Design; D007220:Industrial Waste; D019800:Phenol / Q000737:chemistry; D012722:Sewage; D013861:Thiocyanates / Q000737:chemistry; D013997:Time Factors; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000032:analysis; D018508:Water Purification / Q000379:methods*
chemical_list: D003077:Coke; D007220:Industrial Waste; D012722:Sewage; D013861:Thiocyanates; D014874:Water Pollutants, Chemical; D019800:Phenol; D000641:Ammonia; C031760:thiocyanate