Influencia de la relación C:N en la remoción de nitrógeno usando un sistema combinado de reactores por carga secuencial

this work permitted to evaluate the influence of c/n ratio in a biological treatment system, integrated by two sequential batch reactors, rcsb and rcs. the rcsb permitted the nitrification of the synthetic residual liquid of weak composition and then the denitrification process took place in the rcs under three different conditions of volumetric fraction (α1=0,50; α2=0,20; α3=0,00) used in order to balance the organic carbon content. the system was operated by 6 hours cycles to complete the nitrification (rcsb) and the denitrification (rcs) process. the c/n ratio in the liquid feeding the rcs was 18,7; 6,99 and 7,24 mg cod/mg nox-n for the three α1, α2 and α3 conditions. the nitrate formation in the rcsb was 91%, 95% and 95% for α1, α2 and α3 respectively. the removal of the nitrate in the rcs reached 99%, 77% and 76% for α1 α2 and α3 respectively, indicating a better denitrification process when organic carbon is supplied to the system. the nitrate concentration in the effluent of the rcs were 0,06; 3,6 and 3,9 mg/l for α1 α2 and α3 respectively, which are much lower than the legal requirements in venezuela.