Effect of Hydraulic Retention Time on the Performance of a Compact Moving Bed Biofilm Reactor for Effluent Polishing of Treated Sewage

Water

Jamal Ali Kawan¹  Fatihah Suja’²  Sagor Kumar Pramanik²  Arij Yusof²  Rakmi Abdul Rahman³  Hassimi Abu Hasan⁴ 

[1] Akakus Oil Operations Company, El Sharara Production, El-Tahadi Street (Off Airport Road), Tripoli P.O. Box 91987, Libya;Department of Civil Engineering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia, Bangi 43600, Malaysia;Envirosource Sdn Bhd, No. 13A, Jalan Jernang Jaya 1, Taman Jernang Jaya, Bandar Baru Bangi 43650, Malaysia;Research Centre for Sustainable Process Technology (CESPRO), Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia, Bangi 43600, Malaysia;

关键词: moving bed biofilm reactor;    polishing system;    sewage;    water supply resource;    water reuse;   

DOI  :  10.3390/w14010081

来源: DOAJ

【 摘 要 】

Treated effluent from a wastewater treatment plant can be further reused as a water resource for a water supply treatment plant. In this case, the treated sewage gathered in the study of the Class V National Water Quality Standard (NWQS) of Malaysia would be treated for use as a water resource for a water treatment plant. In a moving bed biofilm reactor (MBBR) with a 500-L working volume, organic pollutants, undesirable nutrients, and bacteria were removed without disinfectant. At 24-h hydraulic retention time (HRT), the maximum removal efficiency of 5-day biological oxygen demand, ammonia–nitrogen (NH3-N), and total phosphorus were 71%, 48%, and 12%, respectively. The biofilm thickness, which was captured using scanning electron microscopy, increased from 102.6 μm (24-h HRT) to 297.1 μm (2-h HRT). A metagenomic analysis using 16S rRNA showed an abundance of anaerobic bacteria, especially from the Proteobacteria phylum, which made up almost 53% of the total microbes. MBBR operated at 24-h HRT could improve effluent quality, as its characteristics fell into Class IIA of the NWQS of Malaysia, with the exception of the NH3-N content, which indicated that the effluent needed conventional treatment prior to being reused as potable water.

【 授权许可】

Unknown