Short SRT (solids retention time) nitrification process/flowsheet

摘要: The short SRT nitrification process/flowsheet was developed to provide an inexpensive alternative for plants in the northern climates which need upgrade their activated sludge process year-round or nitrogen removal. In this supplemental nitrifiers are added daily replenish removed with wasted sludge. grown a separate small side-stream aeration tank using ammonia available digested dewatering liquid digester supernatant. Paper presents description of flowsheet, theoretical background and results modeling. Modeling showed that addition allows main stream nitrify during low winter temperatures at very values. For example 7 10 days 10°C is required, instead 13 18 conventional nitrification. Thus can substantially smaller than required