Evaluation of the efficiency of anaerobic baffled reactor under psychrophilic conditions for domestic wastewater treatment

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Research Paper 01/03/2020
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Evaluation of the efficiency of anaerobic baffled reactor under psychrophilic conditions for domestic wastewater treatment

Yasmin Saif, Nadia Khan, Zukha Idrees, Safia Ahmed
Int. J. Biosci.16( 3), 129-143, March 2020.
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Anaerobic baffled reactor is an efficient anaerobic treatment process for wastewater treatment. Temperature is one of the factors which affect the performance of anaerobic baffled reactor. In this study, efficiency of Anaerobic Baffled Reactor (ABR) was evaluated for the treatment of domestic wastewater at low temperature ranging from 5°C to 13°C. A laboratory scale reactor was constructed and was operated at 19 hours HRT, 23.15 mg COD/hour OLR, 1.47 L/hour flow rate at low temperature in an incubator. Under these operational conditions efficiency was evaluated for various waste water parameters using standard protocols. The results indicated 78, 36, 48 and 47% reduction in COD, total nitrogen, ammonium and sulphates respectively. Micronutrients were also added in Anaerobic Baffled Reactor in solution form, which includes Co, Ni, Cr, Fe, Zn, Mn and Cu in order to improve the microbial activity in ABR. Atomic absorption Spectrophotometry was used for the determination of micronutrients in inlet and outlet of Anaerobic Baffled Reactor throughout the experiments. Utilization efficiency of Ni, Co, Zn, Cr and Fe by microbes was 81, 92, 28, 28 and 95% respectively. Pathogen reduction efficiency of Anaerobic Baffled Reactor at low temperature was determined through Most Probable Number (MPN) which was not significant. It is concluded that anaerobic baffled reactor is a promising technology for wastewater treatment as primary treatment process.


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