Enhancement of azo dye Acid Orange 7 removal in newly developed horizontal subsurface-flow constructed wetland

Enhanced azo dye removal in a continuously operated up-flow anaerobic filter packed with henna plant biomass

“…Previous researches have indicated that plant biomass is always packed into the media of constructed wetland to enhance the removals of nitrate, sulfate and disinfection byproducts [19,22,23]. Tee et al also observed an enhancement of AO7 removal in a constructed wetland which was packed with a mixed media of gravel and agricultural biomass of rice husk [24]. The mechanisms behind the enhanced AO7 reduction in this study are described in the following sections.…”

Multiple aerobic and anaerobic baffled constructed wetlands for simultaneous nitrogen and organic compounds removal

“…Based on this study, it was established that the baffled units achieved a relatively higher removal percentage of ammonia and nitrogen compared to the conventional units [13]. Besides that, Tee et al researched regarding the usage of this constructed wetland units in the enhancement of azo dye, Acid Orange 7 removal [16]. The design of the baffled HSF in the published work of Tee et al was related to the operation of ABCW used in this research; however, the parameters of the study varied in terms of supplementary aeration, number of compartments, wetland media and the type of emergent plant used [13].…”

Wetlands for Wastewater Treatment

“…A study showed that using an electric fan blower for the hybrid VF-HF CWs enhanced the sewage treatment efficiency for BOD, TN and TP (Lee et al, 2015). Baffled HSSF-CW achieved 100% azo dye Acid Orange 7 removal against 73% for conventional CW at HRT of 5 days due to the benefit of multiple aerobic, anoxic, and anaerobic conditions sequentially (Tee et al, 2015).…”