@PHDTHESIS{ 2018:2052540844,
 	title = {Treatment of pulp wastewater by membrane bioreactor},
 	year = {2018},
 	url = "http://tede.unicentro.br:8080/jspui/handle/jspui/1406",
 	abstract = "Treatment of pulp and paper industry wastewaters is usually a challenge mainly due 
 to rapid changes in their composition and presence of large varieties of toxic and 
 inhibitors compounds such as sulfur, tannins, lignin, chlorinated organic compounds, 
 organic matter and organic refractory compounds. Membrane bioreactors (MBR) are 
 being adopted in the treatment of pulp and paper wastewater to obtain high quality 
 effluents in order to meet a strict discharge limit or for the sustainable reuse of the 
 treated effluent. Biomass microbial structure is directly correlated on the type of 
 treatment system hence that enhances process efficiency and stability. Within this 
 study, bench-scale monitoring of anaerobic (SAnMBR) and aerobic MBR systems 
 treating effluent resulted from pulp production was performed. The focus was on the 
 evaluation of the operational performance for the investigation of the mechanisms of 
 removal of compounds and compare the outcomes of this study with data obtained 
 from a full-scale conventional anaerobic reactor (AR) treating the same effluent. 
 Assessing differences in bacterial community, as well as the suitability of ozone and 
 nanofiltration (NF) as post treatment, aiming to achieve water quality parameters for 
 reuse. SAnMBR had 79% removal efficiency of chemical oxygen demand (COD), 
 compared to 20% from AR. The higher SAnMBR suspended solids removal 
 effectiveness was the result of the separation of biosolids by membranes being 
 independent of the biosludge characteristics. The stable and high COD removal 
 efficiency shows that the SAnMBR presents operational robustness for variations in 
 the feed strength and for operational problems, when compared with the full-scale 
 anaerobic digester. Taxonomic analysis indicated Bacteroidetes, Proteobacteria, 
 Euryarchaeota and Firmicutes, are the four most abundant microbial populations in
 SAnMBR sludge samples, being responsible for 77.6% of the whole population. For 
 full-scale AR, the four main phyla, representing 60.4% of the total taxa, were 
 Proteobacteria, Firmicutes, Actinobacteria and Bacteroidetes. The differences in the 
 main operational configurations between AR and SAnMBR and the addition of 
 membrane modules influenced the global efficiency, herewith the biomass diversity. 
 SAnMBR+NF, SAnMBR+MBR and MBR+NF are attractive methods to purify 
 discharge waters for reuse, when comparing final effluents results to water reuse guidelines for wastewater reuse around the world. Experiments with SAnMBR and 
 MBR effluents with and without ozone application as a post-treatment, indicated that 
 the final phytotoxic effect was reduced (GI >50%). The final effluent also showed a 
 good potential for water reuse, and could be as process water or a less rigorous finality.",
 	publisher = {Universidade Estadual do Centro-Oeste},
 	scholl = {Programa de Pós-Graduação em Ciências Florestais (Doutorado)},
 	note = {Unicentro::Departamento de Ciências Florestais}
}