DAF 공정을 이용한 축산폐수의 고형물 분리와 부상특성 = Solid Separation and Flotation Characteristics of Livestock Wastewater Using DAF Process

다국어 초록 (Multilingual Abstract)

The series of experiments under the various conditions were carried out to evaluate the feasibility of dissolved air flotation (DAF) as an alternative of conventional gravity sedimentation (CGS) and to investigate the decrease of the loadings following to biological wastewater treatment processes in livestock wastewater system.
On the basis of the experiment result between CGS and DAF processes, for the other water quality criteria as well as suspended solid the removal efficiency of DAF process was about 20~25 % better than CGS process on average. In addition, the particle removal efficiency of DAF process became higher in proportion as the increase of air to solid (A/S) ratio and the general wastewater treatment efficiency of DAF process was enough to meet the requirement of loading decrease to following biological process even at low A/S ratio range. Though DAF process is widely known as an solid separation unit, there was not the notable relationship between particle separation efficiency and several pollutant removal efficiencies like CODCr and nutrients (T-N, T-P). Assume that the CODCr was removed as the fraction of particle separation in this experiment, the removal efficiency of T-N and T-P were sensitive to removal efficiency of CODCr, especially.

다국어 초록 (Multilingual Abstract)

The series of experiments under the various conditions were carried out to evaluate the feasibility of dissolved air flotation (DAF) as an alternative of conventional gravity sedimentation (CGS) and to investigate the decrease of the loadings following to biological wastewater treatment processes in livestock wastewater system.
On the basis of the experiment result between CGS and DAF processes, for the other water quality criteria as well as suspended solid the removal efficiency of DAF process was about 20~25 % better than CGS process on average. In addition, the particle removal efficiency of DAF process became higher in proportion as the increase of air to solid (A/S) ratio and the general wastewater treatment efficiency of DAF process was enough to meet the requirement of loading decrease to following biological process even at low A/S ratio range. Though DAF process is widely known as an solid separation unit, there was not the notable relationship between particle separation efficiency and several pollutant removal efficiencies like CODCr and nutrients (T-N, T-P). Assume that the CODCr was removed as the fraction of particle separation in this experiment, the removal efficiency of T-N and T-P were sensitive to removal efficiency of CODCr, especially.

참고문헌 (Reference)

1 곽동희, "축산폐수공공처리시설의 운영․ 관리 요령" 23-71, 2000

2 최도영, "점토와 조류입자의 제타전위가 부상분리 효율에 미치는 영향" 대한상하수도학회 19 (19): 437-445, 2005

3 정성욱, "응집침전 부상분리 및 펜톤 산화를 이용한 축산폐수 전처리 연구" 경상대학교 2006

4 곽동희, "용존공기부상(DAF) 공정을 이용한 생물학적 플록의 부상분리" 대한상하수도학회 18 (18): 649-655, 2004

5 김성진, "미세 기포에 의한 활성슬러지의 부상특성" 대한상하수도학회 20 (20): 501-507, 2006

6 이성우, "고도상수처리(원리 및 응용)" 동화기술 2003

7 Kwak, D.H., "Separation Characteristics of Inorganic Particles from Rainfalls in Dissolved Air Flotation: A Korean Perspective" 40 : 3001-3016, 2005

8 Kwak, D.H., "Removal of Clay and Blue-green Algae Particles through Zeta Potential and Particle Size Distribution in Dissolved Air Flotation Process" 6 (6): 95-103, 2006

9 곽동희, "DAF 공정에서 무기 고형입자의 유체역학적 충돌효율과 부상특성" 대한상하수도학회 16 (16): 655-662, 2002

10 Han, M.Y., "Collection efficiency factor of bubble and particle (αbp) in DAF: Theory and experimental verification" 43 (43): 139-144, 2001