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ARAUJO JR., M.M. (2006). Upflow anaerobic-aerobic combined fixed bed reactor for organic matter and nitrogen removal from lysine industry wastewater. São Carlos, 2006. 136p.Thesis – Escola de Engenharia de São Carlos, Universidade de São Paulo. Most of the food industries, mainly the ones that use fermentative processes, generates effluent with high concentrations of organic matter and nutrients (nitrogen mainly), needing of complex systems for its treatment. In this direction, the present work was considered to develop a compact system that can operate as only unit of industrial wastewater treatment, in the removal of organic matter and nitrogen, with low consumption of energy and low sludge production. Therefore, the viability of the upflow anaerobic-aerobic combined fixed bed reactor for the treatment of industrial effluent with organic matter (1400 mg COD/l) and nitrogen (160 mg N/l) was evidenced. The best operational condition of the reactor was obtained applying 35 h of hydraulic retention time (21 h in the anaerobic zone and 14 h in the aerobic zone) and recycle ratio (R) of 3.5. In this condition, the COD, TKN and TN efficiencies removal were of 97%, 94% and 77%, respectively, with average effluent concentrations of 10 ± 36 mg COD/l, 2 ± 1 mg N-NH4 /l, 8 ± 3 mg N-org/l, 1 ± 1 mg N-NO2 /l and 26 ± 23 mg N-NO3 /l. The up-flow fixed bed reactor, operating only in anaerobic condition, presented average efficiencies in the COD removal of 43 ± 9%, 60 ± 9% and 70± 6%, for HRT applied of 11 h, 17 h and 21 h, respectively.

Reator combinado anaeróbio-aeróbio de leito fixo para remoção de matéria orgânica e nitrogênio de água residuária de indústria produtora de lisina