Banca de QUALIFICAÇÃO: THAÍS BARBOSA SERPA ALVES

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : THAÍS BARBOSA SERPA ALVES
DATA : 13/12/2019
HORA: 13:30
LOCAL: Sala Galpão Hidráulica
TÍTULO:

Nitrous oxide emission in biological reactors treating landfill leachate and domestic sewage

PALAVRAS-CHAVES:

Greenhouse gases, MBBR, bioclastic granulate

PÁGINAS: 45
GRANDE ÁREA: Ciências Agrárias
ÁREA: Engenharia Agrícola
RESUMO:

The combined treatment of landfill leachate in sewage treatment plants has been shown to be a promising alternative, although the leachate presents toxic substances that, to determinate concentrations, could compromise the efficiency of the process. The activated sludge process is a well-known technology for wastewater treatment, but over time some variants have emerged, especially by the introduction of support media into the biological reactor. These media can be plastic biomedia, powdered activated carbon, granular activated carbon, bioclastic granulate, among others. In general, the introduction of support media aims at increasing biomass concentration, adsorbing toxic and recalcitrant compounds or nitrification and denitrification by the biofilm. It is also known that these nitrification and denitrification processes, associated with the biological mechanisms of sewage treatment, can cause the emission of nitrous oxide (N2O), considered a greenhouse gas responsible for stratospheric ozone depletion. Thus, this project aims to evaluate the nitrous oxide emission in biological reactors treating landfill leachate and domestic sewage. For this purpose, 3 continuous bench scale reactors will be operated: activated sludge, moving bed biofilm reactor (MBBR) and activated sludge with bioclastic granulate. Will be evaluated 4 leachate/sewage mixtures (0%, 5%, 10% and 20%) and 3 hydraulic retention times (4, 8 and 16h). N2O emission in the reactors will be monitored, as well as the parameters pH, DO, VSS, TSS, SVI, ZSV, OUR, SOUR, COD, BOD, ammonia nitrogen, NTK, nitrite, nitrate, total phosphorus, humic substances and ABS254. With the development of this project, it is expected to correlate the operating conditions of the reactors with N2O emission, and to evaluate the optimal conditions of hydraulic retention time and leachate/sewage mixture for each of the 3 evaluated processes.

MEMBROS DA BANCA:
Presidente - 1759225 - ALEXANDRE LIOI NASCENTES
Interna - 2353141 - LEONARDO DUARTE BATISTA DA SILVA
Externo à Instituição - Renato Pereira Ribeiro - IFRJ
Externo à Instituição - Jaime Lopes da Mota Oliveira - FIOCRUZ