Integrated anaerobic treatment of dairy industrial wastewater and sludge.
Performance parameters were studied in an alternative full-scale dairy effluent treatment system comprising two anaerobic sludge-blanket reactors in parallel arrangement with upward flow, internal fat-separation by flotation, external lamella settler and floated material digester. Reactors were initially inoculated with flocculent sludge and granulated in a high-load stage. Using loading rates up to a maximum 5.5 kg COD/m(3) x d-hydraulic residence time of 17 hours- reactor efficiency was found to remain stable around 90% of COD. Average sludge digester efficiency using a loading rate of 3.5 kgVS/m(3) x d with a lipid content of 47% of COD amounted to 78% of VS (87% of lipid removal). LCFA inhibition as assayed using palmitate was found to depend not only on the palmitate concentration but also on the palmitate-to-biomass concentration ratio.
Passeggi
Mauricio
M
Engineering Faculty, University of the Republic, Montevideo, Uruguay. passeggi@fing.edu.uy
López
Iván
I
Borzacconi
Liliana
L
D000693:Anaerobiosis; D019149:Bioreactors; D002021:Buffers; D003612:Dairying; D007220:Industrial Waste; D008697:Methane / Q000378:metabolism; D010100:Oxygen / Q000302:isolation & purification; D019308:Palmitic Acid / Q000378:metabolism; D012722:Sewage; D014835:Volatilization; D014865:Waste Disposal, Fluid; D018508:Water Purification
D002021:Buffers; D007220:Industrial Waste; D012722:Sewage; D019308:Palmitic Acid; D008697:Methane; D010100:Oxygen