EFFECTS OF TEMPERATURE AND DISSOLVED OXYGEN ON HYDROLYSIS OF SEWER SOLIDS

摘要

Effects of temperature and dissolved oxygen (DO) on kinetics of microbial transformation processes of suspended sewer sediment particles, suspended wastewater particles and wastewater were investigated. Microbial activity was estimated by the oxygen uptake rate. The effects were studied under conditions where biomass had not acclimated to changed temperature or DO conditions Hy- drolysis processes limited the availability of organic substrates for the aerobic microbial growth. The. effects of temperature were interpreted applying an Arrhenius relationship. The average Arrhenius con- stants found for sewer sediment particles and wastewater particles differed significantly from the aver- age Arrhenius constant found for wastewater. The effects of dissolved oxygen concentration were interpreted applying a saturation type relationship. No differences between sewer sediment particles. wastewater narticles and wastewater were found for the oxygen saturaiion coefficienis.