Advanced Treatment in Activated Sludge Process
Advanced Treatment in Activated Sludge Process
Activated sludge process Aeration tank Secondary clarifier Influent Effluent Air supply Return sludge Excessive sludge
Activated sludge process Excessive sludge Effluent Secondary clarifier Influent Return sludge Aeration tank Air supply
Traditionally, activated sludge process is used to remove organic carbon(COD) from wastewaters(municipal and Industries In the process, microorganism in the sludge obtain their energy for cell synthesis (growth)through breaking down organic compounds into inorganic compounds( carbon dioxide) with oxygen as an electron acceptor Since 1970s, eutrophication in inland waters results in the world-wide concern about nutrient(N, P)removal from wastewaters. Traditional activated sludge processes are expanded to be applied in successfully removing n and p from water and wastewaters
Traditionally, activated sludge process is used to remove organic carbon (COD) from wastewaters (municipal and industries). In the process, microorganism in the sludge obtain their energy for cell synthesis (growth) through breaking down organic compounds into inorganic compounds ( carbon dioxide) with oxygen as an electron acceptor. Since 1970s, eutrophication in inland waters results in the world-wide concern about nutrient (N, P) removal from wastewaters. Traditional activated sludge processes are expanded to be applied in successfully removing N and P from water and wastewaters
Nitrogen Removal (Nitrification and Denitrification) Nitrification NH++3/20 Nitrisomenas No-+H0+2H+ NO,+1/20 Nitrobacter NO Denitrification NO3+ Org Denitrifiers +co+ho+oh Nitrification and denitrification can be achieved in activated sludge process and biofilm process. However, activated sludge process is the most widely used process in municipal and industrial wastewater treatment
Nitrogen Removal (Nitrification and Denitrification) Nitrification NH 4 + + 3/2O 2 NO 2 - + H 2O + 2H + NO 2 - + 1/2O 2 NO 3 - Denitrification NO 3 - + Org N 2 + CO 2 + H 2O + OHNitrisomenas Nitrobacter Denitrifiers Nitrification and denitrification can be achieved in activated sludge process and biofilm process. However, activated sludge process is the most widely used process in municipal and industrial wastewater treatment
Single-stage Activated sludge Nitrogen Removal Process Mixed liquor return Effluent Influent Anoxic Aerobic Sludge return Excessive sludge
Single-stage Activated Sludge Nitrogen Removal Process Anoxic Aerobic Mixed liquor return Sludge return Excessive sludge Influent Effluent