Reatores anaeróbios operados em batelada sequencial seguidos de lagoas de polimento para o tratamento de águas residuárias de suinocultura. Parte II: remoção de nutrientes e coliformes

Abstract

RESUMO:Neste trabalho, avaliou-se o desempenho de dois reatores anaeróbios operados em batelada sequencial (ASBR), instalados em série, em escala-piloto (volumes de 280 L e 140 L, respectivamente), no tratamento de águas residuárias de suinocultura, com concentrações de sólidos suspensos totais (SST) em torno de 10.000 mg L -1 . Para o pós-tratamento do efluente do sistema de tratamento com os ASBR, utilizou-se de duas lagoas de polimento (volume de 1.000 L, cada) em série. As cargas orgânicas volumétricas (COV) aplicadas no primeiro ASBR variaram de 4,43 a 12,75 g DQO total (L d) -1 . As eficiências médias de remoção de nitrogênio total Kjeldahl (NTK) e fósforo total (P-total) variaram de 30 a 82% e de 42 a 100%, respectivamente, no sistema de tratamento anaeróbio composto pelos ASBR seguidos das lagoas de polimento. A utilização das lagoas de polimento em série permitiu manter eficiências médias de remoção acima de 80% para o Fe, Mn e Zn e de 76% para o Cu. O número de coliformes termotolerantes foi reduzido a 8x10 3 NMP/100 mL. PALAVRAS-CHAVE:carga orgânica volumétrica, digestão anaeróbia, dois estágios, pós--tratamento, remoção de metais. PERFORMANCE OF ANAEROBIC SEQUENCING BATCH REACTORS IN SERIES FOLLOWED BY POLISHING PONDS ON THE TREATMENT OF SWINE WASTEWATER PART II: REMOVAL OF NUTRIENTS AND COLIFORMSABSTRACT: On this study the performance of two anaerobic sequencing batch reactors (ASBR) installed in series was evaluated, on a pilot-scale testing (volumes of 280 L and 140 L, respectively) for the treatment of swine wastewater with total suspended solids concentrations (TSS) around 10,000 mg L -1 . For the post-treatment of the effluents from ASBR, two polishing ponds in series were used (1,000 L of volume each). The organic loading rates (OLR) applied on the first ASBR varied from 4.43 to 12.75 g total COD (L d) -1 . The mean removal efficiencies for total Kjeldahl nitrogen (TKN) and total-P varied of 30 to 82% and 42 to 100%, respectively, on the anaerobic treatment system compounded by the ASBR followed by polishing ponds. The use of polishing ponds in series has allowed the maintenance of mean removal efficiencies above 80% for Fe, Mn and Zn and 76% for Cu. A number of fecal coliforms above 8 x 10 3 NMP/100/mL were observed on the effluents.

Production of a product similar to gelatin from chicken feet collagen

“…This increase in consumption due to lower product price and technological gains (UBA, 2009), generates a large amount of underutilized housing components. The waste and effluents from the production chain of meat and products of poultry, cattle and swine production have high polluting power and if arranged in inadequate methods, generate serious environmental problems that lead to degradation of soil, surface and ground water environments, and health problems and death of living beings, by the presence of pathogenic microorganisms and animals and poisonous insects (ABREU NETO & OLIVEIRA, 2009;SILVA & ROSTON, 2010;OLIVEIRA 2009a and2009b;MATOS et al, 2010;ORRICO JUNIOR et al, 2010a). …”

Performance of UASB reactors in two stages followed by post-treatment with activated sludge in wastewater batch of wet-processed coffee

“…The two stage anaerobic process consists of two reactors in series, the first for the conversion of soluble compounds and mainly the partial hydrolysis and retention of particulate organic matter, and the second to complement the conversion of soluble compounds of the affluent and the ones formed in the first reactor. In addition, important contributions have been observed in the removal of N, P, metals and coliforms in two-stage or serial anaerobic (BRUNO & OLIVEIRA, 2008;SANTANA & OLIVEIRA, 2011;ABREU & OLIVEIRA NETO, 2009DUDA & OLIVEIRA 2009). In general, in anaerobic reactors, effluents that fit completely in the patterns of Brazilian environmental legislation are not produced.…”

Biogas Production Potential in Anaerobic Digestion of Swine Manure With Different Solid Fraction Concentrations and Temperatures

“…In the EB submitted to 30°C, the average removal of TC and TtC was of 98.6% and 99.4% respectively, with the best result for TC in the EB with the OSF treatment and for TtC in the EB WSSF (Table 7). Duda and Oliveira (2009b) This elevated capacity of reduce the TtC and TC present in the SM due to the wide temperature variation is of great importance for the environment and health, and elects the anaerobic biodigestion as one of the protagonists in the satisfactory treatment of DS, and opens for the possibility of generation of sub-products of added value and with the capacity of mitigating impacts to the environment and to public health (ORRICO JUNIOR et al, 2012).…”