Effect of Cow Manure and Saw Dust as the Additive Materials for Efficient Vermistabilization

Kim, Cbul;Son, Hee-Jeoog;Yoon, Tae-Kyung

  • Published : 2007.12.31


The influence of additive materials including saw dust and cow manure in the ripening of leather sludge for the efficient vermisabilization was studied. The ripening characteristics of the leather sludge, the growth of earthworms in the growth bed and the by-products like cast were observed according to the mixing ratio of additive materials. When the mixed leather sludge of which the additive materials contents were over 20% were ripened for 50 days, the values of ORP and alkalinity were changed to the favorable ranges for earthworms, the positive (+) and below 1,000 mg/l as $CaCO_3$, respectively. The velocity of ripening improving the characteristics of the leather sludge was faster in the sludge mixed with cow manure than saw dust. This results could also be verified from the monitoring of the states of earthworm growth using the survival rate, the increase rate of lifeweight and the hatching rate of earthworm cocoon in the their growth bed packed with the ripened sludge. The values of CEC in cast, the vermi-stabilized sludge, were increased with the mixing ratio of additive materials, but the content of heavy metals was drcreased by the dilution effect and accumulation in the earthworm body. Above results show that the leather sludge might be efficiently stabilized by earthworms through the ripening for 50 days using additive materials. Cow manure can be used as a good additive materials for leather sludge as much as saw dust, and the optimum content of additive materials in the well-ripened leather sludge was about 30%.


vermistabilization;earthworms;additive materials;survival rate;increase of earthworms weight;hatching rate of cocoons


  1. Kim, S.-S. and Shin, H.-S. : Organic waste recycling and waste management. Journal Korea Organic Waste Recycling Council, 1(1), 5-19, 1993
  2. Son, H.-J., Kim, H.-S., Kim, S.-S. and Kim, Y.G. : Vermistabilization of organic sludge. Korean Journal of Environmental Health, 24(1), 112-119, 1998
  3. Son, H.-J. and Kim, H.S. : A fundmental study on vermistabilization of foodwaste. Korean Journal of Environmental Health, 15(4), 91-97, 2000
  4. Kiuohiko Nakasaki, Makoto Shida and Hiroshi Kubota : Effect of bulkong agent on the reaction rate of thermophilic sewage sludge composting. Korean Journal of Environmental Health, 64(6), 539-544. (1986)
  5. Ed Green and Shirley: Full Scale Vermicomposting at the Lufkin Water Pollution Control Plant, Workshop on the Role of Earthworms in the Stabilization of Organic. Residues, 1, 229-231, 1980
  6. Camp Dresser and Mckee: Compendium on Solid Waste management by Vermicomposting. EPA-600/8-80-033, 1980
  7. U.S. EPA, Federal Register: Standards for the Use or Disposal of Sewage Sludge Rule, 56(32), 9247-9420, 1983
  8. Kim, Y.-S., Shon, B.-H., Cho, S.-W. and Jung, J.-H. : Reduction of the offensive odor from confectionery wastewater plant. Korean Journal of Environmental Health, 24(1), 62-69, 1998
  9. 度弘之 : ミミズの 有效利用 とその技術, Scientist Incoporated, 236-250, 1979
  10. Camp Dresser and Mckee : Vermicomposting of Municipal, Solid Wastes and Municipal Wastewater Sludge. Workshop on the Role of Earthworms in the Stabilization of Organic. Residues, 1, 207-219, 1980
  11. Roy Hartenstein : Metabolic Parameters of the Earthworms Eisenia foetida in Relation to Temperature. Biotechnology and Bioengineering, 24, 1803-1811, 1982