The type of SSCW was also considered, with two levels representing to the types: one without plants (or control unit) and one with Heliconia psittacorum plants.
The SSCW with plants had a better performance when the wastewater was pretreated by solar photocatalysis with the lowest level of accumulated UV energy, whereas the tendency was the opposite when the UV accumulated energy was increased.
By other hand, the variance due to the type of SSCW is smaller than the residual error variance; so, the effect of this variable is considered not significant.
The type of SSCW did not influence on the mineralization achieved by the coupled process.
This contribution of organic matter could represent an increase of TOC content; therefore, the overall TOC removal by the SSCW was marginal compared to the achieved by solar photocatalysis.
Two SSCWs were used for this study: one without plants as a control unit and the other one with Heliconia psittacorum planted.
At the first, three Heliconia psittacorum rhizomes were planted in one of the SSCWs for observing how the characteristic microorganisms of the Heliconia's rhizosphere affect the studied parameters.
Both SSCWs were stabilized after a month of a continuous feed of the synthetic wastewater.