Produção Nacional
Performance evaluation of submerged membrane bioreactor pilot units for refinery wastewater treatment
2008; Wiley; Volume: 27; Issue: 2 Linguagem: Inglês
10.1002/ep.10273
ISSN1547-5921
AutoresAna Paula Rodrigues Torres, Vânia Maria Junqueira Santiago, Cristiano Piacsek Borges,
Tópico(s)Water-Energy-Food Nexus Studies
ResumoAbstract A comparative study was conducted by using membrane bioreactor (MBR) pilot units at a Brazilian petroleum refinery (Betim/MG) in order to make possible the implement of this technology at PETROBRAS. This study is part of the water and wastewater reuse project conducted by Petrobras Research & Development Center (CENPES). All pilot units evaluated have the submerged membrane configuration with microfiltration polymeric membranes. One of them operates with flat sheet membranes, while the other uses hollow fiber membranes. The units have hydraulic capacity of 0.5–2.0 m 3 /h, and 60–70 m 2 of installed membrane area, permitting to operate with a permeate flux of 7–30 L/m 2 h. The pilot units evaluation was carried out by monitoring the main biological and membrane process parameters. Results obtained from the study showed that all the MBR systems consistently produced effluent with turbidity <1 NTU, BOD5 <5 mg/L, and NH 3 N < 3 mg/L, corresponding to 98, 97, and 96% removal, respectively. These results allow considering the MBR as an appropriate technology for pretreatment of a membrane water desalination unit for steam production or generation of high quality water for industrial reuse as cooling tower make up. © 2008 American Institute of Chemical Engineers Environ Prog, 2008.
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