Performance of Moving Bed Biofilm Reactor Integrated Septic Tank in Treating Office Building Wastewater

Ahmad Soleh Setiyawan; Farisah Inarah Rahmat Hasby; Va Vandith; Prayatni Soewondo; Chihiro Yoshimura; Dyah Wulandari Putri

doi:10.5614/j.eng.technol.sci.2023.55.4.8

Authors

Ahmad Soleh Setiyawan Water and Wastewater Engineering Research Group (KK-RALC) Bandung Institute of Technology
Farisah Inarah Rahmat Hasby Environmental Engineering, Faculty of Civil and Environmental Engineering, Institut Teknologi Bandung, Jalan Ganesa No. 10 Bandung 40132, Indonesia
Va Vandith National Institute of Science, Technology and Innovation (NISTI), National Road 2, Sangkat Chak Angre Leu, Khan Mean Chey, Phnom Penh, Cambodia, Phnom Penh, Cambodia
Prayatni Soewondo Environmental Engineering, Faculty of Civil and Environmental Engineering, Institut Teknologi Bandung, Jalan Ganesa No. 10 Bandung 40132, Indonesia
Chihiro Yoshimura Department of Civil and Environmental Engineering, School of Engineering and Society, Tokyo Institute of Technology, 2-12-1 Okayama, Meguro-ku, Tokyo, Japan
Dyah Wulandari Putri Environmental Engineering, Faculty of Civil and Environmental Engineering, Institut Teknologi Bandung, Jalan Ganesa No. 10 Bandung 40132, Indonesia

DOI:

https://doi.org/10.5614/j.eng.technol.sci.2023.55.4.8

Keywords:

hydraulic retention time, initial concentration, moving bed biofilm reactor, modified septic tank, office building wastewater

Abstract

This research aimed to find the effect of initial concentration and hydraulic retention time (HRT) on modified septic tank (MST) performance in treating wastewater from an office building. The synthetic wastewater used had an average COD:TN:TP ratio of 84:28:1, adjusted to office building wastewater characteristics. The experiment was executed under steady conditions using three variations of HRT (12, 24, and 36 hours) and different initial concentrations of COD (106, 252 and 432 mg COD/L), TN (35, 85 and 146 mg N/L) and TP (1.26, 3 and 5.14 mg P/L). The result showed that the MST removed 82% to 92% of COD, 41% to 60% of TN, 45% to 61% of NH4, and 39% to 55% of TP. The maximum removal was achieved at 36 h of HRT, COD:TN (3:1), and COD:TP (84:1). One-way ANOVA showed that the initial concentration and HRT had significant effects on the performance of MST (p < 0.05). This suggests that appropriate control of the initial concentration and HRT in the MST can effectively remove organics and nutrients from office building wastewater.

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