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Effect of addition of an ammonium source in UASB and EGSB reactors when treatin...
Vivanco, E.; Puñal, A.; Pizarro, C.; Ferreira, E. C.; Alves, M. M.; Chamy, RolandoIn this work the effect on granules morphology by adding a supplementary nitrogen-ammonium source to UASB and EGSB reactors, treating a low concentrated wastewater is studied. Previously, a complex-synthetic-medium-concentratedwastewater (C/N ratio, 100:4) was fed for granule development and maturation, achieving similar removal performances (higher than 95 % in terms of COD) in both reactors. A subsequent peri...
Biodegradability and toxicity of styrene in the anaerobic digestion process
Araya-Kroff, P.; Chamy, Rolando; Mota, M.; Alves, M. M.Start-up and operation of an Upflow Anaerobic Sludge Blanket (UASB) reactor fed with an industrial effluent from a polymer synthesis plant containing 6 mg styrene 1ˉ¹ was unstable. In batch assays with 200 mg styrene 1ˉ¹, 74% of styrene was degraded at a rate of 7 ml methane gˉ¹ volatile suspended solids.day, without a lag phase. The toxicity limit (IC50) of styrene was 1.4 mM for the acetoclastic activity, 0.4...
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