Efficient aerobic denitrification in the treatment of leather industry wastewater containing high nitrogen concentration

Efficient treatment of baker’s yeast wastewater using aerobic membrane bioreactor

A membrane bioreactor (MBR) system based on a dead-end immersed hollow fiber membrane and filamentous fungus Aspergillus oryzae were used for treatment of baker’s yeast wastewater. The fungus was adapted to the wastewater in the bioreactor for two weeks before starting the continuous process. Average organic loading rate of 4.2 kg COD/m3.d was entered the bioreactor. MBR system was able to redu...

Denitrification of high nitrate concentration wastewater using alternative carbon sources.

The use of different organic carbon sources in the denitrification of wastewater containing 2500 mg nitrates/L in a SBR was studied. Three alternative sources of carbon were tested: wastewater from a sweet factory, a residue from a soft drinks factory and a residue from a dairy plant. The first two are sugar-rich, whereas the third presents a high content in lactic acid. Maximum specific denitr...

Biological denitrification of fertiliser wastewater at high chloride concentration

Wastewater from the fertiliser industry is characterised by high chloride concentration, normally varying between 60 and 76 g/ l. Experiments with biological denitrification were performed in laboratory-scale ‘fill and draw’ reactors with synthetic fertiliser wastewater, with chloride concentrations up to 96.7 g Cl/l at 37°C; the pH was controlled in the range 6.8 to 7.2. Potassium acetate was ...

Study on Nitrification and Denitrification of High Nitrogen and COD Load Wastewater in Moving Bed Biofilm Reactor

Ozone and Electrocoagulation Processes for Treatment of Dye in Leather Industry Wastewater: A Comparative Study

The aim of this study was to investigate the feasibility of two decontaminating processes, ozonation and electrocoagulation, to decolorize wastewater generated by humid finishing leather production. With the objective to determine if one or both process could remove color, benchscale experiments were conducted with three different colorants, representative of the main dye groups: di-azo (CI Dir...