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The effluent quality of sewage treatment plants comprised by UASB reactors essentially depends on design, construction and operational aspects that allow the necessary management of the anaerobic sludge, as well as the appropriate notas técnicas A Revista DAE está l icenciada sob a Licença AtribuiçãoNãoComercial 4.0 Internacional Creative Commons. 90 Revista DAE | núm. 214 | vol. 66 | Edição Especial Novembro 2018 operation of the aerobic post-treatment step. This Technical Note is a complementary material to Part 3 of these Technical Notes series aiming to present the problems and their respective origins, as well as the possible improvements of design, construction and operation of UASB reactors followed by trickling filters (TF). The discussed topics are: i) design and operation aspects that affect solid washouts in UASB effluent, including the influence of aerobic sludge return, ii) the compliance to discharge standards, and iii) deficiencies related to the post-treatment step. Special attention is given to: i) operational control of the sludge in order to avoid solids washouts; ii) organic matter seeking to comply with discharge standards; and iii) factors influencing the performance of trickling filters following UASB reactors.

revista dae

Contribuição para o aprimoramento de projeto, construção e operação de reatores UASB aplicados ao tratamento de esgoto sanitário - Parte 6: Qualidade do efluente