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000738778.pdf: 2239410 bytes, checksum: 67d300ed5e75fde6277a8cfd434059bf (MD5) === No presente trabalho avaliou-se o desempenho de dois sistemas de tratamento na redução de indicadores de contaminação biológica em água residuária de suinocultura. O sistema I foi constituído por dois reatores anaeróbios de fluxo ascendente com manta de lodo (UASB), com volumes de 510 e 209 L, instalados em série e o sistema II foi constituído por reator UASB, filtro anaeróbio, filtro biológico percolador e decantador, instalados em série, com volumes de 300, 190, 250 e 150 L, respectivamente. Os tempos de detenção hidráulica (TDH) aplicados nos primeiros reatores UASB foram de 40, 30, 20 e 11 h nos sistemas I e II. As eficiências médias de remoção de coliformes totais e termotolerantes no sistema I foram de 92,92 a 99,50% e de 94,29 a 99,56% respectivamente, e no sistema II aumentaram para 99,45 a 99,91% e 99,52 a 99,93%, respectivamente. As remoções médias de ovos de helmintos no sistema I foram de 96,44 a 99,11% e no sistema II alcançaram 100% em todos os ensaios. No lodo dos reatores, a contagem de coliformes totais e termotolerantes variou de 105 a 109 NMP (100 mL)-1 e de ovos de helmintos de 0,86 a 9,27 ovos g-1 ST. Não foram detectados cistos de protozoários nos afluentes, efluentes e lodos === The present work evaluated the performance of two treatment systems in reducing indicators of biological contamination in swine production wastewater. System I consisted of two up-flow anaerobic sludge blanket (UASB) reactors, with volumes of 510 and 209 L, placed in series; system II consisted of a UASB reactor, anaerobic filter, trickling filter and decanter, placed in series, with volumes of 300, 190, 250 and 150 L, respectively. Hydraulic retention times (HRT) applied in the first UASB reactors were 40, 30, 20 and 11 h in systems I and II. The mean removal efficiencies of total and thermotolerant coliforms in system I were 92.92% to 99.50% and 94.29% to 99.56%, respectively, and increased in system II to 99.45% to 99.91% and 99.52% to 99.93%, respectively. Average removal rates of helminth eggs in system I were 96.44% to 99.11%, and reached 100% in all assays in system II. In reactor sludge, the counts of total and thermotolerant coliforms ranged between 105 and 109 MPN (100 mL)-1, while helminth eggs ranged from 0,86 a 9,27 eggs g-1 TS. Not protozoan cysts were detected in the tributaries, effluents and sludge
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