Kinetics on Organic Removal by Aerobic Granular Sludge in Bubbled Airlift Continuous Reactor

Andik Yulianto; Nida Maisa Zakiyya; Prayatni Soewondo; Marisa Handajani; Herto Dwi Ariesyady

doi:10.5614/j.eng.technol.sci.2019.51.5.7

Authors

Andik Yulianto Environmental Engineering Department, Faculty of Civil Engineering and Environmental, Institut Teknologi Bandung, Jalan Ganesha No.10 Bandung 40132,
Nida Maisa Zakiyya Environmental Engineering Department, Faculty of Civil Engineering and Environmental, Institut Teknologi Bandung, Jalan Ganesha No.10 Bandung 40132,
Prayatni Soewondo Environmental Engineering Department, Faculty of Civil Engineering and Environmental, Institut Teknologi Bandung, Jalan Ganesha No.10 Bandung 40132,
Marisa Handajani Environmental Engineering Department, Faculty of Civil Engineering and Environmental, Institut Teknologi Bandung, Jalan Ganesha No.10 Bandung 40132,
Herto Dwi Ariesyady Environmental Engineering Department, Faculty of Civil Engineering and Environmental, Institut Teknologi Bandung, Jalan Ganesha No.10 Bandung 40132,

DOI:

https://doi.org/10.5614/j.eng.technol.sci.2019.51.5.7

Keywords:

aerobic, aerobic granular sludge, bubbled airlift reactor, Contois, Grau second-order, Monod, Stover-Kincannon

Abstract

An assessment of aerobic granular sludge (AGS) in a bubbled airlift continuous reactor (BACR) was done to determine the AGS growth kinetics in the continuous reactor and the impact of varied hydraulic retention time (HRT) against the AGS structure. Sodium acetate was used as the sole carbon source with a 100:20 ratio of COD/N synthetic water. The system was operated at five variations of HRT, i.e. 12, 10, 8, 6, and 4 hours, with organic loading rate (OLR) ranging from 1.6 to 4.8 g COD/day in the BACR. Organic removal decreased from 73% to 52%, along with the increment of OLR, while HRT decreased from 12 hours to 4 hours. The kinetics of organic removal in the BACR were examined to get a better understanding of organic removal trends by AGS in a BACR. The models used for biomass growth analysis were the Monod, Contois, Grau second-order, and Stover-Kincannon kinetic models. This study showed that the best suited models for organic removal in BACR were the Grau second-order kinetic model with an a value of 0.1382 and a b value of 1.0776, and the Stover-Kincannon kinetic model with an R_max of 5.8 g COD/L.day and a K_B of 6.24 g COD/L.day.

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