Nitrogen and phosphorus removal from swine wastewater by intermittently aerated dynamic-flow system.
This study was performed to evaluate the effects of the volume fraction of an anaerobic reactor (VFAR) and SRT on the removal of T-N and T-P in both an intermittently aerated system (IAS) and intermittently aerated dynamic-flow system (IADS), respectively. When the VFAR in the total volume of reactor from both IAS and IADS are 13%, 7%, and 0% at 5 days of SRT, the removal efficiencies of T-P were 80-87%, 62-65% and <30%, respectively. However, it was observed from this study that the removal efficiencies of T-N and T-P were not correlated to VFAR at a predetermined SRT, producing greater than 5000 mg/L of MLVSS. Also, IADS was shown to have the greater buffer capacity and adaptability to resist the shock due to the loading of high concentration of N. Furthermore, IADS achieved over 80% of removal efficiency of N even at much lower C/N ratio of 4.7. Therefore, it seems that IADS has the significant advantages over other biological nutrients removal processes.
Hur
H W
HW
Environmental Technologies Research Team, Hanwha Engineering and Construction, Taejon 305-345, Korea. hwhur@hanwha.co.kr
Park
S K
SK
Chung
K Y
KY
Kang
H
H
Lee
S I
SI
D000392:Air Movements; D000818:Animals; D019149:Bioreactors; D008372:Manure; D009584:Nitrogen / Q000302:isolation & purification* / Q000378:metabolism*; D010758:Phosphorus / Q000302:isolation & purification* / Q000378:metabolism*; D013552:Swine; D014865:Waste Disposal, Fluid / Q000379:methods*; D014872:Water Movements; D014873:Water Pollutants / Q000302:isolation & purification*
D008372:Manure; D014873:Water Pollutants; D010758:Phosphorus; D009584:Nitrogen