Advanced treatment of municipal secondary effluent by catalytic ozonation using Fe3O4-CeO2/MWCNTs as efficient catalyst

2017 ◽  
Vol 24 (10) ◽  
pp. 9337-9349 ◽  
Author(s):  
Zhiyong Bai ◽  
Jianlong Wang ◽  
Qi Yang
Keyword(s):  
Catalytic Ozonation ◽  
Advanced Treatment ◽  
Secondary Effluent ◽  
Efficient Catalyst ◽  
Municipal Secondary Effluent

Effect of wastewater particles on catalytic ozonation in the advanced treatment of petrochemical secondary effluent

2018 ◽  
Vol 345 ◽  
pp. 280-289 ◽  
Author(s):  
Siyu Zhang ◽  
Changyong Wu ◽  
Yuexi Zhou ◽  
Yaning Wang ◽  
Xuwen He
Keyword(s):  
Catalytic Ozonation ◽  
Advanced Treatment ◽  
Secondary Effluent

Tertiary treatment of Berlin WWTP effluents with ferrate (Fe(VI))

2013 ◽  
Vol 68 (7) ◽  
pp. 1665-1671 ◽  
Author(s):  
U. Hübner ◽  
M. Jekel
Keyword(s):  
Surface Waters ◽  
Major Product ◽  
Advanced Treatment ◽  
Dual Function ◽  
Secondary Effluent ◽  
Tertiary Treatment ◽  
Efficient Removal ◽  
Promising Alternative ◽  
Secondary Effluents ◽  
The Eu

New and higher standards in the EU water framework directive necessitate advanced treatment of secondary effluents for reduction of trace organic compounds (TrOCs) and nutrients before the discharge into receiving surface waters. Due to its dual function as oxidant and coagulant, ferrate is considered as a promising alternative for tertiary treatment. The oxidation of selected TrOCs and simultaneous flocculation of phosphates by ferrate was tested in batch experiments with secondary effluent from Berlin Ruhleben. The concentrations of carbamazepine (CBZ) and diclofenac were reduced by >90% with ferrate dosages of 6 mg/L as Fe. CBZ was transformed to 1-(2-benzaldehyde)-4-hydro-(1H,3H)-quinazoline-2-one, which is known as the major product from the reaction of CBZ with ozone. In contrast to ozonation, no further transformation of this product was observed. The concentration of ibuprofen was not reduced by ferrate treatment. For efficient removal of 60–100 μg/L phosphate-P to values <20 μg/L, ferrate dosages of 3–4 mg/L as Fe were sufficient.

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