Comportamento de reator UASB sem separador trifásico no tratamento de esgoto sanitário.

Content Provider	Semantic Scholar
Author	Camargo, Bruno Martins De
Copyright Year	2016
Abstract	The objective of this study was to evaluate the operational characteristics of a UASB reactor without the gas collection device (three phase separator) and without the scum retainer screen positioned near the effluent collection channel. The motivation for this research was the interest shown by sanitation companies to apply this simplification, which can result in savings in the implementation of the reactors and practically in eliminating the need of scum removal. An UASB reactor was used with such simplifications with a volume of 24.5 m3 and an operational strategy was established with gradual increase of the feed flow, consisting of four operating phases, with hydraulic retention times, respectively, of 16, 12, 10 and 8 hours. The flows were kept constants at each operating phase, except the last, which was imposed two peak flows throughout the day. The reactor was kept operating with efficiency of COD removal, respectively, of 65.9%, 60.3%, 48.7% and 15,0%. Generally, the pilot reactor had not the expected performance in removal of organic matter, with hydraulic retention time of 8 hours. In the first two fases (HDT of 16 and 12 hours), solid’s content in sludge blanket was high, but had reduced significantly from the second fase, with 10 hours of HDT. In the last fase, the sludge blanket behavior was bit predictable, with progressive drag of solids from reactor. Because of high solids loss, it is believed that the applied device can be used with better performance with the implantation of a settler after the reactor or a post-treatment that ensures the lost solids recovery (for example, activated sludge). Another alternative is the replacement of UASB by the primary clarifier before aerobic post-treatment.
File Format	PDF HTM / HTML
DOI	10.11606/D.3.2016.tde-06122016-142755
Alternate Webpage(s)	https://teses.usp.br/teses/disponiveis/3/3147/tde-06122016-142755/publico/BrunoMartinsdeCamargoCorr16.pdf
Alternate Webpage(s)	https://doi.org/10.11606/D.3.2016.tde-06122016-142755
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article