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Implication of statistical design approach methodology for optimization of COD removal, effluent quality, and biosludge settling properties in aerobic bioreactors
Author(s) -
Zeynali V.,
Sargolzaei J.,
Hedayati Moghaddam A.,
Ali Masoudi Seyed Mohammad
Publication year - 2017
Publication title -
environmental progress and sustainable energy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.495
H-Index - 66
eISSN - 1944-7450
pISSN - 1944-7442
DOI - 10.1002/ep.12595
Subject(s) - effluent , sequencing batch reactor , settling , pulp and paper industry , response surface methodology , suspended solids , bioreactor , total suspended solids , context (archaeology) , wastewater , volume (thermodynamics) , sewage treatment , fractional factorial design , chemistry , mixed liquor suspended solids , factorial experiment , chemical oxygen demand , environmental engineering , environmental science , activated sludge , chromatography , mathematics , engineering , biology , physics , organic chemistry , statistics , paleontology , quantum mechanics
Synthetic wastewater containing wheat starch and different carbon sources were treated using sequencing batch reactor (SBR) in pilot scale. First, the effects of number of impellers, input mixed liquor suspended solid (MLSS), carbon source, and temperature were investigated on treatment ability, effluent quality, and sludge settlement properties by fractional factorial design (FFD). Impeller diameter would not show considerable effect on reactor performance. Next, the most important parameters were investigated within a response surface methodology (RSM) context. Removal efficiency (COD removal), effluent total suspended solid (TSS), and sludge volume index (SVI) were assessed as outputs. The determination coefficient ( R 2 ) value for COD removal, effluent TSS, and SVI were 0.9679, 0.9638, and 0.9744, respectively. In optimum condition, COD removal of 88%, TSS of 62 mg/L, and SVI of 55 mL/g were obtained. © 2017 American Institute of Chemical Engineers Environ Prog, 36: 1428–1438, 2017