Treatment of saline wastewater in SBR aerobic granular reactors.
Fish canning effluents characterized by their salt content, up to 30 g NaCl/L, were treated, previously diluted to desired concentration, in a SBR where aerobic granular sludge was produced. The formation of mature aerobic granules occurred after 75 days of operation with 3.4 mm of diameter, SVI of 30 mL/g VSS and density around 60 g VSS/L-granule. Treated organic loading rates were up to 1.72 kg COD/(m3.d) with fully organic matter depletion. Ammonia nitrogen was removed via nitrification-denitrification up to 40% when nitrogen loading rates were of 0.18 kg N/(m3.d). The presence of salt in the treated effluent did not cause a detrimental effect on the operation of the reactor once the aerobic granules were formed.
Figueroa
M
M
Department of Chemical Engineering, School of Engineering, University of Santiago de Compostela, Lope Gómez de Marzoa s/n, E-15782, Santiago de Compostela, Spain.
Mosquera-Corral
A
A
Campos
J L
JL
Méndez
R
R
D000332:Aerobiosis; D001419:Bacteria / Q000378:metabolism / Q000648:ultrastructure; D019149:Bioreactors; D002244:Carbon / Q000737:chemistry / Q000378:metabolism; D009584:Nitrogen / Q000737:chemistry / Q000378:metabolism; D012965:Sodium Chloride / Q000737:chemistry*; D013997:Time Factors; D014865:Waste Disposal, Fluid / Q000379:methods*; D014867:Water / Q000737:chemistry*; D018508:Water Purification / Q000295:instrumentation / Q000379:methods
D014867:Water; D012965:Sodium Chloride; D002244:Carbon; D009584:Nitrogen