RESUMEN
Avaliou-se o desempenho de um sistema de lagoas seriadas que recebeu efluentes de reator UASB, no tratamento de águas residuárias de suinocultura. O sistema foi composto de reator anaeróbio de chicanas (RAC), reator UASB, em escala real, e uma série de lagoas (uma lagoa facultativa e três de maturação), em escala piloto. As análises físico-químicas realizadas foram: pH, demanda bioquímica de oxigênio (DBO), demanda química de oxigênio (DQO), sólidos suspensos totais (SST), sólidos suspensos voláteis (SSV), nitrogênio amoniacal (N-am.), fósforo total (Pt), coliformes totais (CT) e Escherichia coli (EC). As lagoas de pós-tratamento contribuíram eficientemente para remoção de nutrientes, matéria orgânica e sólidos, fornecendo um efluente com qualidade para o reuso agrícola ou lançamento em corpos d'água...
The performance of a post-treatment pond for treating swine wastewater from an UASB reactor was evaluated. The system was assembled with an anaerobic baffle reactor (RAC), followed by an UASB reactor (UASB) on a real scale, and a post-treatment pond on a demonstration scale. The following parameters were analyzed: pH, biochemical oxygen demand (BOD), chemical oxygen demand (COD), total suspended solids (TSS), volatile suspended solids (VSS), ammonia nitrogen (N-am.), total phosphorus (Pt), total coliforms (CT) and Escherichia coli (E coli.). The post-treatment lagoons contributed efficiently to remove nutrients, organic matter and solids, providing an effluent quality for agricultural reuse or discharge into a body of water...
Asunto(s)
Animales , Crianza de Animales Domésticos/organización & administración , Porcinos , Aguas Residuales , Purificación del Agua , Lagunas de Maduración , Lagunas de Estabilización , Reactores Anaerobios de Flujo AscendenteRESUMEN
A conceptual and integrated analysis of the UASB/Polishing Pond system is presented in relation to the removal of specific constituents not normally covered in the pond's literature, namely surfactants (linear alkylbenzene sulphonate, LAS), micropollutants (phthalates and bisphenol A) and sulfide. Experimental studies carried out on a small full-scale UASB/PP system have shown limited overall removal efficiencies for some constituents (53% to 70% for phthalates and 50% for LAS), but excellent removal levels for bisphenol A (around 99%) and sulfide (no trace concentrations were detected in the second and third ponds of the series). Further research is needed to investigate possible limitations and to identify means to improve the performance of the UASB/PP system.