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Optimization of Sequencing Batch Reactor Operating Conditions for Treatment of High-Strength Pharmaceutical Wastewater

Elmolla, E. S. and Ramdass, N. and Chaudhuri, M. (2012) Optimization of Sequencing Batch Reactor Operating Conditions for Treatment of High-Strength Pharmaceutical Wastewater. [Citation Index Journal]

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Abstract

Optimization of Sequencing Batch Reactor (SBR) operating conditions for treatment of high-strength non-penicillin pharmaceutical wastewater is a challenging task. Two SBR were operated under different operating conditions. Three different Hydraulic Retention Times (HRT) (12, 24 and 48 h) were tested and operatd under high (6000 mg/L) and low (4000 mg/L) Mixed Liquor Suspended Solids (MLSS) concentration. Statistical analysis (two-way ANOVA) using SPSS software was applied on the results to evaluate the effects of HRT and MLSS concentration on the SBR performance. The hydraulic retention time of 24 h was found suitable for the SBR and increasing HRT from 12 to 24 h significantly affected the BOD5 removal; however, increasing HRT from 24 to 48 h or inceasing MLSS concentration from 4000 to 6000 mg/L did not significantly improve the SBR performance in terms of BOD5 removal. Under the optimum operating conditions (HRT 24 h and MLSS concentration 4000 mg/L), the SBR achieved an efficiency of 94±1.3% in terms of BOD5 removal and 83.9±1.7% in terms of COD removal, with complete nitrification.

Item Type:Citation Index Journal
Subjects:T Technology > TD Environmental technology. Sanitary engineering
Departments / MOR / COE:Departments > Civil Engineering
ID Code:7933
Deposited By: Prof Malay Chaudhuri
Deposited On:14 Aug 2012 03:09
Last Modified:19 Jan 2017 08:21

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