Saltar al contenido
Merck
  • Membrane-integrated hybrid system for the effective treatment of ammoniacal wastewater of coke-making plant: a volume reduction approach.

Membrane-integrated hybrid system for the effective treatment of ammoniacal wastewater of coke-making plant: a volume reduction approach.

Environmental technology (2014-06-25)
Ramesh Kumar, Parimal Pal
RESUMEN

Nanofiltration (NF) of ammoniacal wastewater containing phenol and cyanide has been investigated for effective separation of these hazardous pollutants and for the subsequent downstream chemical treatment resulting in valuable by-product generation. Four different types of composite polyamide commercial NF membranes (Sepro, USA) were tested under different operating conditions including transmembrane pressure and recovery rate (RR). At a transmembrane pressure of 15 bar, the achieved rejection of cyanide and phenol were 95% and 93%, respectively (concentrated stream) when the permeate contained 85% of ammonium-N. A high flux of 120 L m-2 h-1 was achieved during NF at a concentrated mode, with a volumetric cross-flow rate of 800 L h-1 at a pH of 10.0. The RR was 60% for the NF 1 membrane. Fenton's reagents (7.0 and 3.75 g L-1 H202 and FeSO4 . 7H20, respectively) were used to degrade more than 99% of pollutants present in the concentrated stream. In the permeate side, 97% of NH4+ -N was precipitated out as struvite by using Mg2+ : NH4 : PO+4 in 1:1:1 molar ratio at pH 9.0.

MATERIALES
Referencia del producto
Marca
Descripción del producto

Sigma-Aldrich
Peróxido de hidrógeno solution, contains inhibitor, 30 wt. % in H2O, ACS reagent
Sigma-Aldrich
Peróxido de hidrógeno solution, 30 % (w/w) in H2O, contains stabilizer
Sigma-Aldrich
Peróxido de hidrógeno solution, 50 wt. % in H2O, stabilized
Sigma-Aldrich
Iron, ≥99%, reduced, powder (fine)
Sigma-Aldrich
Fenol solution, BioReagent, Equilibrated with 10 mM Tris HCl, pH 8.0, 1 mM EDTA, for molecular biology
Sigma-Aldrich
Peróxido de hidrógeno solution, contains inhibitor, 35 wt. % in H2O
Sigma-Aldrich
Fenol, ≥99%
Sigma-Aldrich
Fenol solution, BioReagent, Saturated with 0.01 M citrate buffer, pH 4.3 ± 0.2, for molecular biology
Sigma-Aldrich
Carbonyl iron, ≥97% Fe basis
Sigma-Aldrich
Iron, puriss. p.a., carbonyl-Iron powder, low in magnesium and manganese compounds, ≥99.5% (RT)
Sigma-Aldrich
Iron, powder, −325 mesh, 97%
Sigma-Aldrich
Iron, granular, 10-40 mesh, >99.99% trace metals basis
Sigma-Aldrich
Fenol, natural, 97%, FG
Supelco
Fenol solution, certified reference material, 500 μg/mL in methanol
Sigma-Aldrich
Fenol, BioUltra, for molecular biology, TE-saturated, ~73% (T)
Millipore
Peróxido de hidrógeno solution, 3%, suitable for microbiology
Supelco
Fenol solution, 5000 μg/mL in methanol, certified reference material
Sigma-Aldrich
Iron, foil, thickness 0.1 mm, ≥99.9% trace metals basis
Sigma-Aldrich
Fenol, puriss. p.a., ACS reagent, reag. Ph. Eur., 99.0-100.5%
Sigma-Aldrich
Iron, chips, 99.98% trace metals basis
Sigma-Aldrich
Iron, wire, diam. 1.0 mm, ≥99.9% trace metals basis
Sigma-Aldrich
Fenol solution, ≥89.0%
Sigma-Aldrich
Fenol, for molecular biology
Sigma-Aldrich
Peróxido de hidrógeno solution, 34.5-36.5%
Sigma-Aldrich
Peróxido de hidrógeno solution, contains inhibitor, 30 wt. % in H2O, meets USP testing specifications
Supelco
Peróxido de hidrógeno solution, ≥30%, for trace analysis
Iron, foil, 100x100mm, thickness 0.25mm, hard, 99.5%
Supelco
Peróxido de hidrógeno solution, 30 % (w/w), for ultratrace analysis
Sigma-Aldrich
Fenol, puriss., ≥99.5% (GC), meets analytical specification of Ph. Eur., BP, USP, crystalline (detached)
Supelco
Fenol, Pharmaceutical Secondary Standard; Certified Reference Material