The main flocculant agent used in the water and wastewater treatment process is the polyacrylamide, of which monomers are highly toxic. The purpose of this project is to solve this problem by evaluating the behavior of the bioflocculant pectin extracted from the orange peel. The pectin extraction was made by the citric acid and characterized the obtained material with the degree of esterification (DE) and galacturonic acid content (GAC) with neutralization volumetric method. Flocculation tests were made in synthetic residual water considering 3 values of initial pH: 3.3; 7.8 and 10.6. In pH 10.6, all the samples presented flocculation activities better than 90%, that is, is the most favorable to the pectin flocculation process.

The environmental instability caused by increasing presence of metallic ions and dyes in the water has been increasing in the last decades, as the number of researches looking for methods of liquid effluents depollution. One of these methods is the adsorption. The group synthesized the magnetite (Fe3O4) as a form of low cost and high efficiency adsorber material, together with active carbon and polyurethane. It was aimed at the removal of dyes, cobalt ions (Co2+) and cadmium ions (Cd2+) from effluents. To prove its efficiency, an experimental methodology was used to simulate the aquatic environment where the synthesized materials would act. Additionally, it was tried to recover the material used in order to reduce the environmental impacts of the research.

During 2014-2015, the city of São Paulo, the biggest metropolis in Brazil, struggled with a very serious water crisis. In this context, SIMECHR - Residential Water Monitoring and Control System was developed. It is an equipment able to monitor in real time the incoming water flow to any house and residential buildings. Access can be made remotely through a mobile application. The tool allows the users to monitor the water level in their tanks and enables them to check undesired air flow in water pipes, as well as leaks, leading towards a more efficient consumption. It also helps the users validate the amount charged in the supplier bill. Therefore, SIMECHR contributes to engage the society in more conscious water habits.

The northeast of Brazil is characterized by a semi-arid climate and chronic drought.