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      Sistemas Alagados Construídos em Batelada: remoção de Demanda Bioquímica de Oxigênio e regulação de pH no tratamento de efluentes de laticínios Translated title: Constructed Wetlands Systems Batch: removal of Biochemical Oxygen Demand and pH regulation for treatment dairy effluent

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          Abstract

          Este trabalho foi desenvolvido, com sistemas alagados construídos (SACs), para avaliar a eficiência no tratamento de efluentes de laticínios. Procurou-se avaliar a influência de substratos e espécies vegetais, sobre a eficiência na remoção de DBO e regulação de pH, em seis unidades experimentais operadas, em batelada, em escala piloto. Os seis SACs foram montados em tanques de polietileno etileno de alta densidade (PEAD) com volume total de 100 litros, para tratamento de águas residuárias de laticínios (ARC). Os substratos utilizados foram a brita n° 0 em três dos SACs e brita n° 0 e areia em outros três, na proporção de 80% brita e 20% areia. Quatro unidades experimentais foram cultivadas e duas mantidas como testemunhas. As espécies selecionadas foram as macrófitas Typha dominguensis (taboa) e o Hedychium coronarium (lírio do brejo). A eficiência média mínima encontrada no tratamento foi de 77,8 % e máxima de 95,2 %, em termos de remoção de DBO, e foi mantida a faixa de pH entre 5 e 9, conforme estabelecido pela Resolução CONAMA 430/2011, para lançamento e curso de água. Os seis tratamentos apresentaram remoção de compostos carbonáceos biodegradáveis semelhantes não havendo diferenças significativas entre tratamentos com nível de confiança de 95%. O estudo mostrou que os SACs operando em batelada podem ser utilizados no tratamento de águas residuárias de laticínios para a remoção de DBO e regulação do pH.

          Translated abstract

          This work assessed the effectiveness of using constructed wetlands (CW's) to treat dairy effluent. The purpose of the research was to evaluate the influence of substrates and cultivated plants on the efficiency of Biochemical Oxygen Demand (BOD) removal and pH regulation in six experimental units operating at pilot scale. Six CW's for dairy sewage treatment were constructed in 100-liter High-Density Polyethylene Ethylene (HDPE) tanks. Three constructed wetlands containing fine gravel (0 mm) and another three with a mix of 20% sand and 80% fine gravel (0 mm) were used in the filtering stage. Four experimental units were planted with the macrophytes Typha dominguensis (cattail) and Hedychium coronarium (pond lily), the selected plants for this study, and two others were maintained as control units. A minimum average of 77.8% and a maximum of 95.2% BOD efficiency removal were achieved and a pH range of 5 to 9 was maintained as required by the Brazilian Resolution CONAMA N. 430 /2011 in order to release the effluent into a waterway. The six treatments showed similar removal of biodegradable carbonaceous compounds with no significant differences between the treatments at a 95% confidence level. This work showed that CW's operating in batch can be used to treat dairy raw water for BOD removal and pH regulation.

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          Most cited references 16

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          Standard methods for the examination of water and wastewater

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              Treatment of dairy wastewater using constructed wetlands and intermittent sand filters

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                ambiagua
                Revista Ambiente & Água
                Rev. Ambient. Água
                Instituto de Pesquisas Ambientais em Bacias Hidrográficas (Taubaté )
                1980-993X
                June 2015
                : 10
                : 2
                : 442-453
                Affiliations
                [1 ] Universidade Federal de Juiz de Fora Brazil
                [2 ] Universidade Federal de Juiz de Fora Brazil
                [3 ] Universidade Federal de Viçosa Brazil
                [4 ] Universidade Federal de Juiz de Fora Brazil
                Article
                S1980-993X2015000200442
                10.4136/ambi-agua.1511

                http://creativecommons.org/licenses/by/4.0/

                Product
                Product Information: website
                Categories
                ENGINEERING, ENVIRONMENTAL

                Environmental engineering

                efficiency, macrófitas, tamponamento, macrophytes, buffering, eficiência

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