Banca de QUALIFICAÇÃO: NIXDALI FREIRE DE OLIVEIRA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : NIXDALI FREIRE DE OLIVEIRA
DATE: 26/02/2026
TIME: 15:00
LOCAL: Remoto
TITLE:

Impact of Social Sanitation Technologies in Rural Communities of the Brazilian Semi-Arid Region

KEY WORDS:

Rural sanitation, Social technology, organic waste, Reuse, Sustainability in the Semi-arid region.

PAGES: 35
BIG AREA: Engenharias
AREA: Engenharia Sanitária
SUMMARY:

The deficit in basic sanitation is one of the main socio-environmental challenges in Brazil, especially in rural areas, where the lack of such services is more pronounced. In semi-arid regions, this situation is exacerbated by socioterritorial particularities and water scarcity. In this context, the reuse of treated domestic wastewater emerges as a strategy capable of integrating the agricultural and sanitation sectors, supplying water and essential nutrients for agricultural production. In addition, the use of organic livestock waste promotes nutrient recycling and encourages the circular bioeconomy. The objective of this study was to analyze the environmental and socioeconomic impacts of social technologies aimed at the agricultural reuse of treated domestic wastewater- the Biodigester Septic Tank (FSB) and the Family Bio-Water system (BF)- as well as the biodigestion of animal waste through the Sertanejo Biodigester, installed in five properties in the rural community of Catolé, located in Lajes Pintadas, Rio Grande do Norte, Brazil. The methodology was based on two complementary approaches. The first consisted of developing sustainability indicators distributed across three dimensions (environmental, social, and economic), resulting in a Global Sustainability Index (GSI) of 2.64, considered high. The second approach involved technical and laboratory analyses of the effluents produced by the technologies. The results indicated that the effluents from the FSB and BF represent promising alternatives for agricultural reuse, although they present high levels of SAR, electrical conductivity, and thermotolerant coliforms, indicating the need for system improvements and proper fertigation management. The Biodigester Sertanejo, in turn, proved to be efficient in biogas production, with methane (CH₄) content above 55%, which was used for cooking as a substitute for firewood and traditional cooking gas (liquefied petroleum gas, LPG). Furthermore, the digestate generated in the process, containing macro- and micronutrients, demonstrated high viability as a biofertilizer.

COMMITTEE MEMBERS:
Presidente - 3216945 - HÉRIKA CAVALCANTE DANTAS DA SILVA
Externa ao Programa - 2012116 - CIBELE GOUVEIA COSTA CHIANCA - UFRNExterna ao Programa - 2736085 - SANDRA RUFINO SANTOS - UFRNExterna à Instituição - DAYANA MELO TORRES - IFRN