Utilização de filtros de areia de fluxo intermitente no pós-tratamento de efluentes de reator UASB tratando esgoto doméstico

• Ano de defesa: 2014
• Autor(a) principal: Silva, Franknairy Gomes
• Orientador(a): Fideles Filho, José
• Banca de defesa: Henrique, Israel Nunes , Pace, Frederico Tejo Di
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Estadual da Paraíba
• Programa de Pós-Graduação: Mestrado em Ciência e Tecnologia Ambiental - MCTA
• Departamento: Tecnologia Ambiental
• País: BR
• Palavras-chave em Português: Esgoto sanitário; Reator UASB; Tratamento de efluente
• Área do conhecimento CNPq: CNPQ::CIENCIAS HUMANAS::GEOGRAFIA
• Link de acesso: http://tede.bc.uepb.edu.br/tede/jspui/handle/tede/1993

In that research were evaluated two systems of intermittent flux sand filters in UASB reactor effluent post-treatment concerning to household wastewater care. Post-treatment by the using of intermittent flux sand filters makes the reusing of effluent and the nutrients preservation, being also a conventional technology of treatment and adaptable to small communities. The present work had as its aim the investigation of UASB reactor developing followed by intermittent flux sand filters in a household wastewater treatment. The research has been evaluated through three experimental phases and the anaerobe effluent was put on two sand filters systems. One of the aerobe systems worked with one sand filter only and the other system operated with two sand filters in serie. In the first phase the reactor UASB was monitored with hydraulic holding time of 7,7 h, with flow of 1400 L day -1 and each effluent put on two sand filters system with application tax of 400 L m -2 day -1 , with daily dosages from the affluent in 8 cycles. In the second phase the anaerobe reactor worked with flow of 1150 L day -1 and hydraulic holding time of 9,4 h. The two application systems of sand filters had an application tax of 280 L m -2 day -1 , each one of them, with daily dosages from the affluent in 8 cycles. In the third time were kept the same operational characteristics used in the second phase for UASB reactor with changing in the application tax for 300 L m in the sand filters system and daily dosages from the affluent to 6 cycles. The filters system suffered blocking problems during the first and second phase when the resting period was much low for the recuperation of the filters re-oxygenizing. In the third phase with the dosages diminution and the increasing of the resting time the sand filters had no troubles of blocking. In the first and second phase the FAFin-S sand filters (Intermittent Flux Sand Filters in serie) were more efficient in the TKN and ammonia remotion compared to FAFin sand filter (Intermittent Flux Sand Filter). Now, in the third phase the ammonia medium concentrations were of 1,4 mg L -1 and 1,0 mg L -1 and some medium value for nitrate of 33 mg L -1 and 30 mg L -1 for FAFin and FAFin-S, respectively. In terms of COD the two filters systems showed remotions above 83% in the second and the third phase and elevated remotions of TSS in the measure of 89 % to 95%. The final effluent preserves the nutrients presented in household wastewater, indicating the viability of intermittent flux sand filters system in post-treatment the anaerobe effluent for the agriculture reusing of cultures, principally in semi-arid regions in Brazil.