Avaliação da eficiência de remoção da carga orgânica e nutrientes de reator aeróbio granular em tubos concêntricos com circulação operado em batelada
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Data
2016-02-01
Autores
Lucio, Danilo Santiago Gomes
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Universidade Estadual Paulista (Unesp)
Resumo
O tratamento de efluentes oriundos de águas residuárias possui importância significativa para diminuir os impactos ambientais provocados pela ação do homem em determinado meio. Atualmente, existem parâmetros legais que normatizam os processos de tratamento de esgoto doméstico para que o efluente gerado seja processado antes de seu despejo em recursos hídricos com o intuito de diminuir a ação de agentes biológicos e substâncias/compostos químicos nocivos à saúde do homem e do meio ambiente. A investigação de mestrado proposta objetivou analisar a eficiência da remoção de nutrientes, proveniente de esgoto doméstico, por intermédio da utilização de um Reator Granular em Tubo Concêntrico com Circulação, a partir da administração de carvão ativado de bagaço de cana-de-açúcar (CABC) como material de suporte. O reator foi fixado em uma Estação Elevatória de Esgoto do município de Ilha Solteira - SP. Para avaliar a eficácia do tratamento proposto, as variáveis: temperatura, pH, alcalinidade, DQO, sólidos sedimentáveis, sólidos suspensos, sólidos totais, nitrogênio total e fósforo total do efluente submetido ao reator foram monitoradas em consonância com o Standard Methods for the Examination of Water and Wastewater. O estudo foi desenvolvido em duas fases: de partida (desenvolvimento do biofilme no material de suporte) e operacional (aumento dos ciclos operacionais no reator e menor tempo de sedimentação), sendo esta última subdividida em Fase A (análises da DQO, temperatura e pH) e Fase B (avaliação da remoção da matéria carbonáceas, matéria nitrogenada e fósforo). Os resultados demonstram que o os grânulos aeróbios podem ser cultivados em reatores granulares em tubos concêntricos com circulação. A investigação também apresentou viabilidade para a remoção da carga orgânica carbonácea em 65% e 78% nas Fases A e B, respectivamente, quando o sistema foi operado em menores tempos de ciclos e de sedimentação. A remoção da matéria nitrogenada e do fósforo total foram, em média, de 51% e 37%, respectivamente. A diminuição do tempo de operação dos ciclos, bem como do tempo de sedimentação favoreceram a eficácia do sistema.
Treatment of effluents from wastewater has significant importance to reduce the environmental impacts caused by human action. Currently, there are legal standards that regulate the domestic wastewater treatment processes for the effluent to be processed before eliminating on water resources in order to reduce the action of biological agents and harmful chemical substances to human health and the environment. The research proposal aimed to analyze the efficiency of removal of nutrients from sewage, through the use of a Reactor Granular in Concentric pipe with circulation from the activated carbon of sugarcane bagasse (CABC) as a support material. The reactor was set at a pumping station sewage in Ilha Solteira - SP. To evaluate the effectiveness of the proposed treatment variables: temperature, pH, alkalinity, total COD, solids sedimented, suspended solids, total solids, total nitrogen and phosphorus from the reactor was monitored in accordance with the Standard Methods of Examination of Water and Wastewater. The study was conducted in two phases: starting (development of biofilm on the support material) and operational (increased cycle times in the reactor and reduced settling time), the operational phase was subdivided into Phase A (analysis of COD, pH and temperature) and Phase B (evaluation of the removal of carbonaceous matter, nitrogen and phosphorus matter). The investigation also showed viability for removal of carbonaceous organic load at 65% and 78% in phase A and B, respectively, when the system was operated at lower cycle times and sedimentation. The removal of nitrogenous matter and total phosphorus were on average 51% and 37%, respectively. The reduction of the operation cycle time and the settling time favoring the system's effectiveness.
Treatment of effluents from wastewater has significant importance to reduce the environmental impacts caused by human action. Currently, there are legal standards that regulate the domestic wastewater treatment processes for the effluent to be processed before eliminating on water resources in order to reduce the action of biological agents and harmful chemical substances to human health and the environment. The research proposal aimed to analyze the efficiency of removal of nutrients from sewage, through the use of a Reactor Granular in Concentric pipe with circulation from the activated carbon of sugarcane bagasse (CABC) as a support material. The reactor was set at a pumping station sewage in Ilha Solteira - SP. To evaluate the effectiveness of the proposed treatment variables: temperature, pH, alkalinity, total COD, solids sedimented, suspended solids, total solids, total nitrogen and phosphorus from the reactor was monitored in accordance with the Standard Methods of Examination of Water and Wastewater. The study was conducted in two phases: starting (development of biofilm on the support material) and operational (increased cycle times in the reactor and reduced settling time), the operational phase was subdivided into Phase A (analysis of COD, pH and temperature) and Phase B (evaluation of the removal of carbonaceous matter, nitrogen and phosphorus matter). The investigation also showed viability for removal of carbonaceous organic load at 65% and 78% in phase A and B, respectively, when the system was operated at lower cycle times and sedimentation. The removal of nitrogenous matter and total phosphorus were on average 51% and 37%, respectively. The reduction of the operation cycle time and the settling time favoring the system's effectiveness.
Descrição
Palavras-chave
Esgoto doméstico, Tratamento de efluente, Reator granular em tubo concêntrico com circulação, Carvão ativado de bagaço de cana-de-açúcar, Domestic sewage, Treatment effluent, Granular reactor in concentric pipe with circulation, Activated carbon of sugarcane bagasse