Name: VINICIUS ALVARENGA LIPRANDE
Publication date: 27/03/2024
Advisor:
Name |
Role |
|---|---|
| ROBSON BONOMO | Advisor |
Examining board:
| Name |
Role |
|---|---|
| ROBSON BONOMO | Advisor |
Summary: Many regions of Brazil are characterized by low rainfall or an irregular distribution of rainfall, especially the semi-arid region of the Northeast and some areas of the Southeast, such as the north of the State of Espírito Santo, included in the drought polygon. In the areas of the northern region, especially the city of São Mateus, there is a frequent presence of water with high levels of total iron, an element capable of causing serious clogging problems. This occurs mainly when the iron is in a reduced form, prone to precipitate inside the pipes after oxidation, also favoring the development of iron bacteria. Taking into consideration some difficulties identified in the northern region of Espirito Santo, with the use of water with high iron content in its composition, for use in an irrigation system. Therefore, the objective of this work was to evaluate the performance of sand filters, made up of different proportions of zeolites (0; 33 and 67%), associated with aeration/decantation, addition of Ca and Cl and the use of magnetic fields in the adaptation of ferruginous waters from tubular wells with depths of 6 and 40 meters to be used in a drip irrigation system in the north of the state of Espirito Santo. Thus, evaluate the degree of clogging and uniformity of flat, labyrinth and non-self-compensating system (SPC) emitters, as well as the reductions in total iron (FeT) after passing the water through the treatment system. For this purpose, a prototype irrigation system was developed on the UFES/CEUNES experimental farm, located in the municipality of São Mateus, northern region of E.S., where it operated according to regional water demand, alternating the operating time monthly. For data collection, samples were collected biweekly, bimonthly and quarterly (according to the analysis to be carried out), at 26 different points in the project. The analyzes will be subjected to a field study with descriptive analysis, in order to identify the most efficient treatments for reducing the iron present in the water. In which it was identified that the use of aeration and decantation significantly reduced the concentration of iron present in the water, reducing the risk of clogging of emitters from high to medium when evaluated. The Emission Coefficients (CUE) were “excellent”, noting that with the use of water with a high iron content, without additional treatment, the time of use of this source began to show a drop in the CUE values. This project aims to provide subsidies so that they can be used by producers in making decisions about more appropriate management, making it possible to obtain an increase in the uniformity of water application and system performance, associated with the reduction of cleaning and expansion of useful life of the emitters in the irrigation system, bringing with it the exemption of these activities in the field for the producer.
