actvited sludge system的用法和样例：
- Physico-chemical parameters of Baoding Lugang Sewage Treatment Plant activated sludge system were predicted based on microfauna.
- In addition,the removal effectiveness of Sulphide,Tannin and Chromiun in a activated sludge system is also examined.
- The sludge system through continuous addi ng of water and inoculation and culture of aerobic bacteria are promoted.
- The key factor of dephosphorization &denitrification is to control the inverse sludge system.