Does water flow type influence performances of reed based constructed wetland for wastewater treatment?

The application of Phragmites australis based constructed wetlands (CW) have been widely used in various climates and also used for secondary treatment of diverse wastewater and polluted water. This work compares the treatment performance of two Phragmites-based mesocosms: the first with surface horizontal flow (SF), and the other with subsurface horizontal flow (SSF), in the same conditions of feeding and climate. The results showed a significantly high mineral content of the effluent water exiting SSF-CW.

Nitrogen and phosphorus uptake and biomass production in four riparian plants grown in subsurface flow constructed wetlands for urban wastewater treatment.

Riparian woodlands play a multiple ecological and environmental role, including control of non-point source pollution and increasing of nutrients retention. Four riparian species (Arundo donax L., Salix purpurea L.

Metabolic, Physiological, and Transcriptomics Analysis of Batch Cultures of the Green Microalga Grown on Different Acetate Concentrations.

Acetate can be efficiently metabolized by the green microalga . The regular concentration is 17 mM, although higher concentrations are reported to increase starch and fatty acid content. To understand the responses to higher acetate concentrations, cells were cultivated in batch mode in the light at 17, 31, 44, and 57 mM acetate.

Performance of Lemna gibba bioreactor for nitrogen and phosphorus retention, and biomass production in Mediterranean climate.

Lemna gibba (Lemnaceae) had been experimented in Morocco to develop macrophyte-based wastewater treatment systems adapted to the local climatic and socio-economic circumstances. This species growing on pre-treated urban wastewater, in a lagoon (Lemna bioreactor) operating in fed-batch, generates a net productivity of 28.39 t dw.

In vivo chlorophyll fluorescence screening allows the isolation of a Chlamydomonas mutant defective for NDUFAF3, an assembly factor involved in mitochondrial complex I assembly.

The qualitative screening method used to select complex I mutants in the microalga Chlamydomonas, based on reduced growth under heterotrophic conditions, is not suitable for high-throughput screening. In order to develop a fast screening method based on measurements of chlorophyll fluorescence, we first demonstrated that complex I mutants displayed decreased photosystem II efficiency in the genetic background of a photosynthetic mutation leading to reduced formation of the electrochemical proton gradient in the chloroplast (pgrl1 mutation). In contrast, single mutants (complex I and pgrl1 mutants) could not be distinguished from the wild type by their photosystem II efficiency under the conditions tested.