Introduction Effluents from leather industries contain high organic and inorganic loadings, and dissolved and suspended solids1,2. Apart from chemicals used in tanning process, other chemicals released from skin and hide contribute chemical oxygen demand (COD, 1000-4000 mg/l), biological oxygen demand (BOD, 300-800 mg/l) and total organic carbon (TOC, 350-1500 mg/l) of wastewater. Syntans (synt...

Wet scrubbing combined with ozone oxidation has become a promising technology for simultaneous removal of SO2 and NOx in exhaust gas. In this paper, a new 20-species, 76-step detailed kinetic mechanism was proposed between O3 and NOx. The concentration of N2O5 was measured using an in-situ IR spectrometer. The numerical evaluation results kept good pace with both the public experiment results a...

New odour prevention strategies in wastewater treatment facilities need to be investigated find effective and low-cost technologies for the control of malodorous emissions. In this study, potential activated sludge (AS) oxidized nitrogen (N-NOx) recycling as an environmentally-friendly cost-effective strategy minimization nuisance during was evaluated optimized using H2S, acetic acid α-pinene m...

Activated sludge acclimatization was assessed for pinewood biochar to study phenol biodegradation from synthetic effluents. The produced in a continuous pyrolysis system (auger reactor) at 525 °C and characterized by scanning electron microscopy (SEM), X-ray diffraction, Fourier Transform Infrared (FTIR), elemental analysis, particle size evaluation. Sludge greatly facilitated the rate, especia...

This research describes the results of anaerobic digestion gelatine as a potential hydrogen source with heat-shocked inoculum. The concentrations applied were VSS (volatile suspended solids) ranging from 10 g VSS/L to 30 VSS/L. initial process pH was 5.5, and, depending on concentration, reached values 7.5 7.8 after 55 days. Although inoculum in collagen, that occurred hydrogenotrophic digestio...

The aim of the study was to determine oxidation potential selected persistent, environmentally relevant antibiotics (Amoxicillin, Levofloxacin, and their mixture with Vancomycin) reduce environmental emissions. Ozonation (O3) indirect ozonation at pH 9.5 (O3/pH9.5) were catalytically enhanced by addition Fe2+ (O3/Fe2+) photocatalytic in combination UV-A black light (O3/Fe2+/UV) two temperatures...

Decolorization of synthetic azo dye solution of Congo red dye, as an anionic dye was studied in a batch reactor using Advanced Oxidation Process (AOP). Congo red has been selected amongst azo dyes due to its high solubility in aquatic environment. AOP is effectively removing color in azo dye wastewater due to its strong oxidizing property by breaking down the functional group that impacting col...

Combined sewer overflows (CSO), generated during the wet weather flow from combination of inflow and stormwater runoff in system, result an overflow untreated wastewater which might ultimately contain different micropollutants (MPs). In this study, a coagulation-flocculation-sedimentation (CFS) pretreated CSO spiked with MPs was treated by catalytic ozonation using carbon, iron, peroxide-based ...

Ordered mesoporous alumina (MA) and Fe-doped MA were synthesized by evaporation-induced self-assembly tested for the ozonation of sulfamethoxazole (SMX). The synthesis methodology produced whose surface structural properties exceeded those commercial types displaying a BET area 263 m2/g, pore volume 0.8 cm3/g aligned cylindrical pores c.a. 10 nm. SMX (20 mg/L) was performed in semibatch stirred...

In this work, the efficiency and the technical feasibility of the anaerobic digestion of vegetable tannery industry primary sludge (VTPS) was investigated. Tests were conducted under mesophilic conditions in three laboratory scale (150 L) reactors. The investigation included two different solids retention time (15 and 25 d) and the codigestion of VTPS plus fleshing. Results showed that an incre...