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dc.contributor.authorSittikorn Kamngamen_US
dc.contributor.authorThammarat Koottatepen_US
dc.contributor.authorNawatch Surinkulen_US
dc.contributor.authorChawalit Chaiwongen_US
dc.contributor.authorChongrak Polpraserten_US
dc.contributor.otherMahidol Universityen_US
dc.contributor.otherThammasat Universityen_US
dc.contributor.otherAsian Institute of Technology Thailanden_US
dc.identifier.citationJournal of Water Sanitation and Hygiene for Development. Vol.10, No.4 (2020), 874-884en_US
dc.description.abstract© IWA Publishing 2020. This study was conducted to evaluate the treatment performance of the anoxic–oxic–anoxic processes in illuminated biofilm reactor (AOA-IBR) in removing organics and nitrogen contained in septic tank effluent. The 27 L of the AOA-IBR was illuminated with red light-emitting diode (LED) lamps (peak wavelength of 635 nm, intensity of 100 μmol/(m2 s)). Three types of biofilm media, namely ball ring®, plastic sheets and zeolite beads, were placed in the anoxic, oxic and anoxic zones, respectively, of the reactor to support the growth of microalgal–bacterial biofilm. The AOA-IBR was continuously fed with septic tank effluent and operated at hydraulic retention times (HRTs) of 24, 48 and 72 h. The experimental results found the increases in chemical oxygen demand (COD), total nitrogen (TN) and ammonia nitrogen (NH4-N) removal efficiencies with increasing HRTs in which the HRT of 72 h resulted in 78.6, 72.8 and 90.6% removals of COD, TN and NH4-N, respectively. The effluent quality of the AOA-IBR could meet the ISO 30500 effluent standards for Non-Sewered Sanitation Systems. The predominant microalgal biofilm species was observed to be Oscillatoria sp., while Proteobacteria was the predominant bacterial phylum found in the biofilm growing in the reactor. The above results suggested the applicability of the AOA-IBR in improving septic tank treatment performance which should result in better water pollution control.en_US
dc.rightsMahidol Universityen_US
dc.subjectEnvironmental Scienceen_US
dc.titlePerformance evaluation of anoxic–oxic–anoxic processes in illuminated biofilm reactor (Aoa-ibr) treating septic tank effluenten_US
Appears in Collections:Scopus 2020

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