Also, in waste stabilization ponds, Cyanobacteria
and their associated toxins are commonly observed and constitute
a potential risk when water is reused. Barrington et al. (2013)
studied the effect of hydrogen peroxide for removal of cyanobacteria
and microcystins, and offer to treatment plant operators the
possibility to assess the benefit of using H2O2 to rapidly suppress
cyanobacterial and microcystin concentrations. Sidrach-Cardona
and Bécares (2013) studied the rate of resistance of bacteria found
in the effluent of experimental constructed wetlands to antibiotics.
Tests were conducted in simultaneous comparison of several
experimental wetlands with different plants and flow conditions.
The results indicated that significant amounts of antibiotic resistant
bacteria were found in all wetlands. Authors point out that faecal
bacteria removal efficiency is higher is the experimental wetlands
than in a conventional activated sludge treatment plant, and therefore
this suggests that ecotechnologies like constructed wetlands
have lower antibiotic resistant bacteria.