Response Surface Methodology for Optimization of Rotating Biological Contactor Combined with External Membrane Filtration for Wastewater Treatment

Sharjeel Waqas and Noorfidza Yub Harun and Muhammad Roil Bilad and Taufik Samsuri and Nik Abdul Hadi Md Nordin and Norazanita Shamsuddin and Asep Bayu Dani Nandiyanto and Nurul Huda and Jumardi Roslan (2022) Response Surface Methodology for Optimization of Rotating Biological Contactor Combined with External Membrane Filtration for Wastewater Treatment. Membranes, 12. pp. 1-16. ISSN 2077-0375

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URL: https://www.mdpi.com/2077-0375/12/3/271

Abstract

A large amount of wastewater is directly discharged into water bodies without treatment, causing surface water contamination. A rotating biological contactor (RBC) is an attached biological wastewater treatment process that offers a low energy footprint. However, its unstable removal efficiency makes it less popular. This study optimized operating parameters in RBC combined with external membrane filtration (RBC-ME), in which the latter acted as a post-treatment step to stabilize the biological performance. Response surface methodology (RSM) was employed to optimize the biological and filtration performance by exploiting three parameters, namely disk rotation, hydraulic retention time (HRT), and sludge retention time (SRT). Results show that the RBC-ME exhibited superior biological treatment capacity and higher effluent quality compared to stand-alone RBC. It attained 87.9 ± 3.2% of chemical oxygen demand, 45.2 ± 0.7% total nitrogen, 97.9 ± 0.1% turbidity, and 98.9 ± 1.1% ammonia removals. The RSM showed a good agreement between the model and the experimental data. The maximum permeability of 144.6 L/m2 h bar could be achieved under the optimum parameters of 36.1 rpm disk rotation, 18 h HRT, and 14.9 d SRT. This work demonstrated the effective use of statistical modeling to enhance RBC-ME system performance to obtain a sustainable and energy-efficient condition.

Item Type:	Article
Keyword:	Attached growth process , Biofilm , Biological wastewater treatment , Response surface methodology , Analysis of variances , Box–Behnken design membrane fouling , Rotating biological contactor
Subjects:	T Technology > TD Environmental technology. Sanitary engineering > TD1-1066 Environmental technology. Sanitary engineering
Department:	FACULTY > Faculty of Food Science and Nutrition
Depositing User:	SITI AZIZAH BINTI IDRIS -
Date Deposited:	16 Jun 2022 11:37
Last Modified:	16 Jun 2022 11:37
URI:	https://eprints.ums.edu.my/id/eprint/32797

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