Journal of environmental and Sanitary engineering (환경위생공학)

Korean Society for Environmental Sanitary Engineers (대한환경위생공학회)
권호 표지

Treatment of stock wastewater by flocculation with Calsium and Magnesium salts

칼슘과 마그네슘염을 이용한 축산폐수의 응집처리

  • Published : 2002.12.01
Download PDF
⟨ Previous Next ⟩

Abstract

The changes of conventional clarification processe and an increase in treatment cost are required to meet increasingly stringent regulations related to the treated water quality. Although many enhanced coagulations have introduced to improve organic matter removal, the results to remove color, nitrogen and phosphorus as well as organic material have not been very efficient yet. In this context as new flocculation using calcium hydroxide and magnesum sulfate was carried out. The removal of waste matters such as SS, organic matter, COD, nitrogen and phosphorus contained in stock wastewater was carried out by using the combination of calcium hydroxide and magnesium sulfate. The flocculation was investigated as a function of coagulant dose, pH, mixing time, settling time and coagulant addition modes such as the sequential addition of the two coagulants and the simultaneous addition of them. The flocculation by the combination of calcium hydroxide and magnesium sulfate was compared with that by aluminum sulfate. The mechanism of flocculation was investigated as well. About 60% of COD in stock watewater was removed by flocculation with combination of calcium hydroxide and magnesium sulfate.

Keywords

References

  1. 첨단환경기술 no.7 무기응집제의 특성과 수처리응용(4) 곽종운
  2. 대한환경공학회지 v.20 no.10 정수장 응집공정 향상을 위한 수처리제의 최적사용 박홍석;이상윤
  3. Water Science and Technology v.36 no.4 Flocculation in presence of organic macromolecules of natural water and secondary effluents Nava Narkis;Menahem Rebhun https://doi.org/10.1016/S0273-1223(97)00423-X
  4. Wastewater Engineering,(3rd ed.) George Tchobanoglous;Franklin L.Burton
  5. Colloids and Surfaces A v.162 A study od dual polymer floculation Aixing Fan;Nicholas J.Turro;P.Somasundaran https://doi.org/10.1016/S0927-7757(99)00252-6
  6. Colloids and Surfaces A v.81 X.Yu;P.Somasundaran https://doi.org/10.1016/0927-7757(93)80231-3
  7. Colloids Interface Science v.177 X.Yu;P.Somasundaran https://doi.org/10.1006/jcis.1996.0033
  8. Colloids and Surfaces A v.98 G.Petzold;K.Lunkwitz https://doi.org/10.1016/0927-7757(95)03133-X
  9. Colloids and Surfaces A v.119 The use of oppsitely charged polyelectro lytes as flocculants and retention aids G.Petzold;H.M.Buchhammer;K.Lunkwitz https://doi.org/10.1016/S0927-7757(96)03740-5
  10. Standard method for the examination of water and wastewater,(19 ed.)