Quick Start Up STP After Shutdown

• Domestic wastewater, 20 cum/d, underground integrated treatment equipment, A/O

• process , Anaerobic tank 2 m3, aerobic tank 10 m3,

• Due to 7 days vacation, most staff was absent, although add nutrient source for system during vocation period, but no any wastewater coming in

- After vocation, smelly odor occurred, sludge floating,

- Biofilm dying out

- COD, Ammonia, P effluent failure to discharge standard

1. 1) Pumping out floating sludge, refill wastewater;

2. 2) Dosing 8 kg anaerobic digestion product to anoxic tank;

3. 3) Dosing 10 kg aerobic bacteria;

4. 4) Dosing 8 kg Nitrifying bacteria products to aeration tank;

5. 5) Stop influent & effluent, active on aerating device for 22 hours, stop 2 hours;

6. 6) After 24 hours, 1/2 feed influent, 48 hours later, full influent;