Title: Performance evaluation of an extended aeration treatment plant: a case study in Sarawak, Malaysia

Authors: Ahmad Faiz Abd Rashid; Mohamad Ezad Hafez Mohd Pahroraji; Amira Shazlin Adnan; Juferi Idris; Albright Jeffary; Baxley Jinuin Victor; Nur Diana Wakimin; Muhamad Firdaus Abdullah; Rafidah Husen

Addresses: Faculty of Architecture, Planning and Surveying, Universiti Teknologi MARA (UiTM), Sarawak Branch, Samarahan Campus, Jalan Meranek, 94300 Kota Samarahan, Sarawak, Malaysia ' Faculty of Architecture, Planning and Surveying, Universiti Teknologi MARA (UiTM), Sarawak Branch, Samarahan Campus, Jalan Meranek, 94300 Kota Samarahan, Sarawak, Malaysia ' Faculty of Architecture, Planning and Surveying, Universiti Teknologi MARA (UiTM), Sarawak Branch, Samarahan Campus, Jalan Meranek, 94300 Kota Samarahan, Sarawak, Malaysia ' Faculty of Chemical Engineering, College of Engineering, Universiti Teknologi MARA (UiTM), Sarawak Branch, Samarahan Campus, Jalan Meranek, 94300 Kota Samarahan, Sarawak, Malaysia ' Faculty of Chemical Engineering, College of Engineering, Universiti Teknologi MARA (UiTM), Sarawak Branch, Samarahan Campus, Jalan Meranek, 94300 Kota Samarahan, Sarawak, Malaysia ' Faculty of Chemical Engineering, College of Engineering, Universiti Teknologi MARA (UiTM), Sarawak Branch, Samarahan Campus, Jalan Meranek, 94300 Kota Samarahan, Sarawak, Malaysia ' Faculty of Chemical Engineering, College of Engineering, Universiti Teknologi MARA (UiTM), Sarawak Branch, Samarahan Campus, Jalan Meranek, 94300 Kota Samarahan, Sarawak, Malaysia ' STOMA Sdn. Bhd., 387 Sublot 28, Lorong Burung Bunga Api, Taman Hong Leong, Jalan Penrissen, 93250 Kuching Sarawak, Malaysia ' Faculty of Applied Sciences, Universiti Teknologi MARA (UiTM), Sarawak Branch, Samarahan 2 Campus, 94300 Kota Samarahanm Sarawak, Malaysia

Abstract: The extended aeration system is a sewage treatment plant for domestic and industrial wastewater. This study evaluates the performance of an extended aeration treatment plant (EATP), located at Universiti Teknologi MARA Sarawak Branch which has operated for more than 20 years. The evaluation consists of the temperature, pH, turbidity, total suspended solids (TSS), and chemical oxygen demand (COD) of influent (raw wastewater) and effluent (treated wastewater). The results show that the temperature, pH, turbidity, TSS, COD, and BOD5, of the effluent were in the range of 29.0°C to 30.5°C, 7.2 to 7.4, 16.6 NTU to 64.1 NTU, 76.6 mg/L to 176.0 mg/L, 32.0 mg/L to 67.5 mg/L and 18.0 mg/L to 68.0 mg/L respectively. Overall, most of the parameters are within the Standard B of Department of Environment Malaysia excluding turbidity, TSS and BOD5, which were marginally high. The plant is considered functioning well, and proper maintenance service is essential to ensure the effluent is within the standard limit.

Keywords: biochemical oxygen demand; chemical oxygen demand; COD; extended aeration treatment plant; EATP; performance evaluation; pH; total suspended solid; TSS; turbidity; wastewater; Malaysia.

DOI: 10.1504/IJEWM.2024.139243

International Journal of Environment and Waste Management, 2024 Vol.34 No.2, pp.249 - 259

Accepted: 02 Mar 2022
Published online: 28 Jun 2024 *

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