A degradação física, química e biológica da matéria orgânica presente dos resíduos sólidos gera um subproduto altamente poluidor, denominado lixiviado.Várias técnicas de tratamento aplicadas a esse efluente vêm sendo investigadas a fim de adequá-lo ao lançamento no corpo receptor sem causar prejuízos ao meio ambiente. Este trabalho teve como objetivo avaliar a aplicabilidade do
O despejo inadequado de efluentes em mananciais de abastecimento pode acarretar a presença de cianobactérias toxigênicas produtoras de microcistinas (MCs) nocivas à saúde. Desse modo, este trabalho teve por objetivo avaliar a eficiência do tratamento por ciclo completo, em escala de bancada, associado ou não à adsorção em carvão ativado na forma pulverizada – CAP ou granular – CAG, para água de estudo com densidade celular da ordem de 105 cel mL-1 de Microcystis sp. e concentração aproximada de 20 µg L-1 de MCs. Para tanto foram utilizados o hidróxi-cloreto de polialumínio como coagulante, 14 tipos de CAP e 7 de CAG. Os resultados indicaram a necessidade de associação da adsorção em carvão ativado ao tratamento por ciclo completo para produção de água tratada com valores inferiores a 1,0 µg L-1 de MCs, valor máximo permitido no Anexo XX da Portaria de Consolidação n° 5/2017.
GLOSSÁRIO (OPCIONAL)Citar, se necessário, glossário para siglas e termos não usuais. Não há pontuação para este tópico e não deve ser incluído na contagem para limite de páginas. REFERÊNCIAS BIBLIOGRÁFICAS (OPCIONAL)Citar, se necessário, as fontes bibliográficas que foram usadas nesse trabalho. Não há pontuação para este tópico e não deve ser incluído na contagem para limite de páginas. REFERENCIAL TEÓRICO;WATER LOSS MANAGEMENTTOOLS AND METHODS FOR DEVELOPING COUNTRIES; 2012; Pag.70. https://docplayer.net/41392725-Water-loss-management-tools-and-methods-for-developingcountries.html.
The leachatefrom landfillhas high concentrations of organic matter, humic and nitrogenous compounds, heavy metals and inorganic salts, which requiresproper treatment for its final destinationand does not cause damage to the environment. Studies show that the biologically treated effluent requires an association of physical-chemical techniques.Thisstudy aimed to evaluate the application of complementary techniques to thebiological treatmentsuch as coagulation-flocculation-sedimentation(CFS)andFenton's reaction oxidation(FR), followed by adsorption. The CFS with ferric chloride and FRpost-treatments isolated had100% and 87,9%, organic mattercorrelated with true color removal and 53,6% and 67,0% of CODremoval,which meetwiththe requirements of CONAMA 357/05 e 430/11 for disposal in water bodies. The adsorption after Fenton reaction resulted in 84,5% organic matter correlated with true color removal and 67,0% of CODremoval. Adsorption after coagulation-flocculation-sedimentation was able to reduce 76,9% of COD. CFSshowed higher removal efficiency of organic matter correlated to the true color, while RFobtained higher removal efficiency of NKT, N-ammoniacal and COD parameters. The biologically treated leachate did not show significant toxicityacute to the test organism saline artemia, however, after the post-treatment, acute ecotoxicity in the limits established by CEMA 81/10.
Textile effluents when discharged into water bodies without proper treatment cause damage to the water quality of the receiving bodies, mainly due to the large amount of dyes used for dyeing tissues, being necessary to conduct research aiming to improve the treatment efficiency of these effluents. Thus, the objective of this work wasto assessthe removal of pigments Copper phthalocyanine,naphthol monoazole, diaxazine and diazotic, by testbench. For this, the synthetic effluent with pigment dispersion of Copper phthalocyanine was prepared, and the treatments used were coagulation-flocculation and sedimentation using polyaluminium hydroxychloride as coagulant, followed by fixed bed adsorption and the treatment efficiency was measuredthe following parameters: pH, conductivity, turbidity and pigment concentration. The results indicated the best coagulation condition with in pH of 7.41 and 10 mg.L-1dosage of coagulant resulting in 95.0% turbidity and 90.0% color removal. The best adsorbent, CAG 01,for adsorption sampled in this work presented Methylene blue index of 328.12 mg.g-1 and adsorption capacity in equilibrium equal44.57 mg g-1. Coagulation-flocculation and sedimentation treatment removed 75.29% of the pigments and withadsorption treatment, the removal of the pigments reached 97.30%.
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