Banca de QUALIFICAÇÃO: JÉSSICA YSABELLY TORRES ALVES

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : JÉSSICA YSABELLY TORRES ALVES
DATA : 04/06/2018
HORA: 16:45
LOCAL: Auditório da Eng. Ambiental - CTEC/UFRN (Sala 212)
TÍTULO:

OPTIMIZATION OF ACTIVATED SLUDGE SYSTEM EMPLOYED IN POST-TREATMENT OF UASB REACTOR IN WARM CLIMATE REGIONS

PALAVRAS-CHAVES:

Activated sludge. Uasb. Biological nitrogen removal. Kinetic constants. Optimization. Modeling.

PÁGINAS: 28
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Sanitária
RESUMO:

One of the most widespread technologies for the biological treatment of sewage is the activated sludge process (AS), mainly due to high effluent quality and reduced area requirements. Among the existing configurations, the activated sludge system used in post-treatment of UASB reactors (UASB + AS) is widely used in warm climate regions, owing to aeration economy, less sludge production and stabilized surplus sludge, leading to savings in its treatment. However, this configuration alters the influent substrate composition, giving the biomass different kinetic characteristics from the ones found in other, more usual systems. For this reason, the use of operational criteria in UASB followed by activated sludge systems often occurs inadequately in Brazil, generating an effluent of impaired quality, in regard to organic matter and nitrogen removal. In this sense, the lack of adequate kinetic parameters for the UASB + AS system and the complexity of the biochemical phenomena make it difficult to control the optimization of the activated sludge system (OASS) with this configuration. A widely used tool in the OSLA is the mathematical modeling developed by the International Water Association (IWA), one of these models being the ASM3 (Activated Sludge Model). For the use of the model, it is necessary to validate the kinetic data, some determined in the laboratory (YH, YA, μH, μA and bH) and others suggested by the model. Thus, this work aims to optimize the performance of a conventional activated sludge system used in the post-treatment of an UASB reactor in a warm climate region, by means of adjusting operational factors such as sludge recirculation, internal and by-pass ratios, obtaining ideal operation that produces effluent in accordance with the required discharge standards.

MEMBROS DA BANCA:
Presidente - 1759924 - HELIO RODRIGUES DOS SANTOS
Externo ao Programa - 3919045 - JULIANA DELGADO TINOCO
Externo à Instituição - SILVÂNIA LUCAS DOS SANTOS - UFCG