Laboratory Study of Dynamic-State Control of Activated Sludge Processes

摘要

A laboratory study on using the solids flux curve for the dynamic-state control of a completely mixed activated sludge process was carried out. Activated sludge of a municipal sewage treatment plant was transported to the laboratory. First, the g and h values of the sludge settling characteristics were determined; then using these values together with the values of the sludge suspended solids concentration and the surface area of the settling tank, a sludge recycle rate was calculated for a given influent flow rate. The laboratory activated sludge treatment unit was operated with various influent flow rates and their respective calculated sludge recycle flow rates.