TY - JOUR
T1 - Hydraulic Retention Time Influence on Improving Flocculation in the Activated Sludge Processes Through Polyelectrolytes
AU - Almeida-Naranjo, Cristina E.
AU - Espinoza-Montero, Patricio J.
AU - Muñoz-Rodríguez, Marcelo I.
AU - Villamar-Ayala, Cristina A.
N1 - Publisher Copyright:
© 2017, Springer International Publishing AG Switzerland.
PY - 2017/7
Y1 - 2017/7
N2 - Hydraulic retention time (HRT) influence improving sludge flocculation with adding the polyelectrolytes (non-ionic, anionic, and cationic) was studied on an activated sludge (AS) system fed with synthetic domestic wastewater (SDW), dairy industry wastewater (DIW), and caramel industry wastewater (CIW). The sludge volumetric index, food/microorganism ratio (F/M), and mixed liquor volatile suspended solids at different HRTs (6, 8 and 10 h) were monitored on an experimental model. Results showed that both SDW and IW had the best sludge flocculation conditions at 8 h and 100 mL of non-ionic polyelectrolyte (0.2 mg L−1). In addition, this phenomenon reached the organic matter removal efficiencies of 95.9, 95.7, and 94.2% for SDW, DIW, and CIW, respectively. Therefore, optimum HRT increased the organic matter removal efficiencies by 10%, sludge concentration by 37% (22–55%), and F/M ratio by 70%. Moreover, the polyelectrolytes used in AS improved the sludge flocculation by 2.9 times.
AB - Hydraulic retention time (HRT) influence improving sludge flocculation with adding the polyelectrolytes (non-ionic, anionic, and cationic) was studied on an activated sludge (AS) system fed with synthetic domestic wastewater (SDW), dairy industry wastewater (DIW), and caramel industry wastewater (CIW). The sludge volumetric index, food/microorganism ratio (F/M), and mixed liquor volatile suspended solids at different HRTs (6, 8 and 10 h) were monitored on an experimental model. Results showed that both SDW and IW had the best sludge flocculation conditions at 8 h and 100 mL of non-ionic polyelectrolyte (0.2 mg L−1). In addition, this phenomenon reached the organic matter removal efficiencies of 95.9, 95.7, and 94.2% for SDW, DIW, and CIW, respectively. Therefore, optimum HRT increased the organic matter removal efficiencies by 10%, sludge concentration by 37% (22–55%), and F/M ratio by 70%. Moreover, the polyelectrolytes used in AS improved the sludge flocculation by 2.9 times.
KW - Activated sludge system
KW - Industrial wastewater
KW - Polyelectrolytes
KW - Sludge characteristics
KW - Sludge flocculation
KW - Synthetic domestic wastewater
UR - http://www.scopus.com/inward/record.url?scp=85021302771&partnerID=8YFLogxK
U2 - 10.1007/s11270-017-3427-0
DO - 10.1007/s11270-017-3427-0
M3 - Article
AN - SCOPUS:85021302771
SN - 0049-6979
VL - 228
JO - Water, Air, and Soil Pollution
JF - Water, Air, and Soil Pollution
IS - 7
M1 - 253
ER -
