Long-term evaluation of different strategies of cationic polyelectrolyte dosage to control fouling in a membrane bioreactor treating refinery effluent.
In this article, the long-term use of cationic polyelectrolyte to improve the sludge filterability and to control membrane fouling in bioreactor membrane while treating refinery effluents have been evaluated in pilot scale. Corrective and preventive cationic polyelectrolyte dosages have been added to the membrane bioreactor (MBR) to evaluate the membrane fouling mitigation in both strategies. The results have confirmed that the use of the Membrane performance enhancer (MPE) increased the sludge filterability and reduced the membrane fouling. During the monitoring period, stress events occurred due to the increase in oil and grease and phenol concentrations in the MBR feeds. The preventive use of cationic polyelectrolyte allowed for a more effective and stable sludge filterability, with lower cationic polyelectrolyte consumption and without decreasing MBR's overall pollutant removal performance.
a Department of Sanitary and Environmental Engineering , Federal University of Minas Gerais , Belo Horizonte , MG , Brazil.
Aline R
AR
Alkmim
a Department of Sanitary and Environmental Engineering , Federal University of Minas Gerais , Belo Horizonte , MG , Brazil.
Paula R
PR
da Costa
b Research and Development Center of PETROBRAS S.A/CENPES , Rio de Janeiro , RJ , Brazil.
Priscila B
PB
Moser
c Chemistry Department , Federal Center of Technological Education of Minas Gerais , Belo Horizonte , MG , Brazil.
Luzia S
LS
França Neta
b Research and Development Center of PETROBRAS S.A/CENPES , Rio de Janeiro , RJ , Brazil.
Vânia M J
VM
Santiago
b Research and Development Center of PETROBRAS S.A/CENPES , Rio de Janeiro , RJ , Brazil.
Ana C
AC
Cerqueira
a Department of Sanitary and Environmental Engineering , Federal University of Minas Gerais , Belo Horizonte , MG , Brazil.
Míriam C S
MC
Amaral
D001704:Biopolymers / Q000032:analysis; D019149:Bioreactors; D002244:Carbon / Q000032:analysis; D005374:Filtration / Q000295:instrumentation; D005427:Flocculation; D007220:Industrial Waste; D008567:Membranes, Artificial; D000066388:Oil and Gas Industry; D011073:Polyamines; D000071228:Polyelectrolytes; D012722:Sewage; D014865:Waste Disposal, Fluid / Q000295:instrumentation* / Q000379:methods; D014873:Water Pollutants / Q000032:analysis
D001704:Biopolymers; D002244:Carbon; D007220:Industrial Waste; D008567:Membranes, Artificial; D011073:Polyamines; D000071228:Polyelectrolytes; D012722:Sewage; D014873:Water Pollutants
Membrane bioreactor; fouling; membrane performance enhancer; refinery effluent; sludge filterability