Anaerobic treatment of fish flour wastewater

Abstract

We carried out a kinetic study on the anaerobic digestion of waste‐water generated by the production of fish flour. Three bioreactors containing different immobilization supports were investigated. Assuming first‐order kinetics, the experimental results were fitted to the equation G = G_m [l ‐ exp(K_ot)]. We determined the apparent kinetic constant of the process (K_o ) and found it to be dependent on the nature of the support at chemical oxygen demand (COD) levels below 9 g/L. Higher COD levels resulted in substrate inhibition prevailing over the effect of the support.