Article ID Journal Published Year Pages File Type
232631 Journal of Water Process Engineering 2014 8 Pages PDF
Abstract

In this study, a 3-L compartmentalized activated sludge (CAS) system with 6 compartments was designed and fabricated. In the start-up stage, pre-acclimatized inoculums were added into the CAS and the system was operated under certain operating conditions until the system performance remained at a steady state. The effects of two process variables (mixed liquor volatile suspended solids (MLVSS) and influent chemical oxygen demand (CODin)) on the reactor performance were investigated and the process was modeled and analyzed using response surface methodology (RSM). From the results, the ratio of food to microorganism (F/M) was found to be the most important factor for the process control. Maximum removal efficiency (89%) was determined at a MLVSS and CODin of 4800 and 2000 mg/L, respectively. Kinetic coefficients (Y and Kd) were determined as 0.0815 g VSSproduced/g CODrem and 0.009 d−1, respectively. Biodegradation of Co-amoxiclav and ciprofloxacin were also investigated in the CAS system. The COD removal dropped from 29 to −18% after five turnovers (two days) for Co-amoxiclav. The process instability was also observed by a remarkable increase in effluent turbidity (>370 NTU) as a result of intensive biomass decomposition.

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Physical Sciences and Engineering Chemical Engineering Chemical Engineering (General)
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