Toluene mineralization by denitrification in an up flow anaerobic sludge blanket (UASB) reactor

摘要: Abstract In order to examine the effect of easily degradable substrate such as acetate on toluene mineralization by denitrification, an upflow anaerobic sludge blanket (UASB) reactor in steady state was set up. The experimentation carried out two stages. Initially, fed with a carbon loading rate 250 mg acetate-C L−1 d−1 electron source. Nitrate (mg NO 3 - – N L 1 d ) adjusted obtain constant C/N ratio 1.4. second stage, five toluene-C rates (TLR, mg toluene-C L−1 d−1), 25, 50, 75, 100 and 125, were assessed while total maintained at 250 mg C L−1 d−1 1.4, respectively. so doing, acetate-C acetate-C L−1 d−1) gradually substituted toluene-C. When only source dissimilative denitrifying process resulted indicated bicarbonate yield Y HCO , produced/mg consumed) 0.74 ± 0.005 ( 2 N2 0.89 ± 0.042. addition different TLR did not affect biological consumption efficiency (CCE) values remained up 95% ± 3.5 higher than 0.71 ± 0.03 0.88 ± 0.01, Toluene denitrification continuous culture successfully achieved. A simple UASB system has promising applications for complete conversion nitrate, into CO2 minimal production.