Abstract
Anaerobic digestion of effluent from a petrochemical plant producing terephthalic acid has been tested using two Upflow Anaerobic Sludge Blanket (USAB) reactors. The reactors were seeded with two different inocula: one from an anaerobic stabilization pond receiving wasted sludge from the aerobic treatment plant of the petrochemical industry (reactor A); the other was an anaerobically adapted activated sludge from a municipal wastewater treatment plant (reactor B). At the beginning of the experiment, reactor A attained higher COD removal efficiencies and biogas production, but both reactors reached the same performances after 7 mo operation. The efficiencies in COD removal were low. At a 3 d hydraulic retention time (HRT), reactor A was loaded at 2.6 kg COD/m3 d and reactor B at 2.2 kg COD/m3 d. COD removals were 46.4 and 43.9% for reactor A and B, respectively. In view of these results, the UASB reactor does not appear as the most suitable treatment process for this kind of effluent.
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Guyot, J.P., Macarie, H. & Noyola, A. Anaerobic digestion Of a Petrochemical Wastewater using the UASB process. Appl Biochem Biotechnol 24, 579–589 (1990). https://doi.org/10.1007/BF02920280
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DOI: https://doi.org/10.1007/BF02920280