ARTÍCULO
TITULO

Application of activated sludge process followed by physical-chemical processes in the treatment of industrial saline effluent for reuse - doi: 10.4025/actascitechnol.v35i2.13006

Milene Carvalho Bongiovani    
Márcia Dezotti    
Geraldo André Thurler Fontoura    

Resumen

The treatment of complex effluent with high salinity and sometimes with toxicity rates from a chemical plant is investigated. Two reactors were monitored continuously: control reactor R1 and reactor R2 adapted for saline effluent with 25h-HRT. The adaptation process to saline effluent (0 - 100%) was effective in removing COD and N-NH4+, respectively with 70 and 85% efficiency. After adaptation, the sequence coagulation/flocculation (40 mg L-1 PAC coagulant and 0.3 mg L-1 cationic polymer), rapid downflow sand filter (120 m3 m-2 day) and reverse osmosis to obtain water for reuse was analyzed. Results obtained by coagulation/flocculation and sand filter sequence were satisfactory, mainly with the removal rates of turbidity at 50-65 and 98%, respectively. Average removals of 91, 87, 98 and 98% were obtained for COD, N-NH4+, TOC and Cl-, respectively, in reverse osmosis, with all parameters below the limits for reuse in cooling towers. However, membrane fouling was detected.  

 Artículos similares

       
 
Moruf Olalekan Yusuf    
Fourier-transform infrared (FTIR) spectroscopy is a fast and simple technique for functional group identification. This work provides a review and insight into the application and interpretation of FTIR spectroscopy for cementitious binders that comprise... ver más
Revista: Applied Sciences

 
Hao Yi, Xiaolin Chen, Zewei Liu, Hongxia Xi, Zecong Ding, Kai Cui and Yongyou Hu    
Chlorinated polyfluoroalkyl ether sulfonates (F-53B) were often used as mist suppressants in the chrome plating industry, resulting in the large discharge of F-53B-containing electroplating wastewater into the aquatic environment. Due to the high toxicit... ver más
Revista: Water

 
Luiz Eduardo Nochi Castro, Larissa Resende Matheus, Rosana Rabelo Mançano, William Gustavo Sganzerla, Rafael Gabriel da Rosa, Tiago Linhares Cruz Tabosa Barroso, Vanessa Cosme Ferreira and Leda Maria Saragiotto Colpini    
Brewer?s spent grains (BSG) are a significant by-product of beer production, and its improper disposal poses environmental challenges. This study investigated the use of BSG for activated carbon production with phosphoric acid as a chemical activator and... ver más
Revista: Water

 
Jouhayna Fdil, Xiaoliang Zhou, Abdelaali Ahmali, Abdelhafid El Alaoui El Fels, Laila Mandi and Naaila Ouazzani    
The use of treated wastewater (TWW) in irrigation has a positive impact by bringing fertilizers and organics. However, increases in the soil?s sodium adsorption ratio (SAR) creates a barrier to long-term TWW irrigation. Alternating well water with wastew... ver más
Revista: Water

 
Haiqiu Fang, Dongfang Yang, Zizhen Su, Xinwei Sun, Jiahui Ren, Liwei Li and Kai Wang    
Graphene has recently attracted a wide range of research interests due to its rigorous two-dimensional structure and extraordinary electrical, thermal and mechanical properties. As a conductive agent, an activated carbon supercapacitor can obtain better ... ver más
Revista: Coatings