Continuous Flow-through Vermireactor for Medium Scale Vermicomposting


  • Musaida Mercy Manyuchi Harare Institute of Technology P.O.BOX BE277 Belvedere Harare
  • Trymore Chitambwe Harare Institute of Technology P.O.BOX BE277 Belvedere Harare
  • Perkins Muredzi Harare Institute of Technology P.O.BOX BE277 Belvedere Harare
  • Quinton Kanhukamwe Harare Institute of Technology P.O.BOX BE277 Belvedere Harare


Keywords— Earthworms, vermicasts, vermireactor, continuous flow-through design


ABSTRACT—Vermicomposting is increasingly becoming popular as an organic waste management technology whereby earthworms feed on the organic waste to produce vermicasts and vermiwash. Several vermireactors have been used for this process as batch systems. However, there is need to design a continuous flow-through vermireactor which allows the simultaneous addition of the organic waste at the same time harvesting the vermicasts. A 5m X 2m X 1.5m vermireactor was proposed to process an initial feed of 7 500kg. A 10cm thick bedding comprising of office paper, card board paper and Eisenia fetida earthworms stocked at 1kg/m2 of the vermireactor was used as an initial bedding. The feed bed was 20cm thick and comprised of paper, cow dung, corn pulp and vegetables. The pH, temperature and moisture content in the vermireactor ranged between 5.5-7.5, 19-25°C and 28-52% respectively. 7kg/day of vermicasts were produced given the earthworms produced 75% of their bodyweight as vermicasts per day. The caked vermicasts were expelled by the aid of a breaker bar. The vermireactor was constructed from polyvinyl chloride. Vermicasts containing nitrogen (4.19%), phosphorous (1.15%) and potassium (6.18%) were obtained. The continuous flow-through vermireactor design allowed the production of stable vermicasts and can be used in medium scale vermicomposting.

Author Biography

Musaida Mercy Manyuchi, Harare Institute of Technology P.O.BOX BE277 Belvedere Harare

Harare Institute of Technology



D. C. Jadia and M. H. Fulekar, “Vermicomposting of vegetable waste: A bio-physicochemical process based on hydro- operating bioreactor “, African Journal of Biotechnology, 7 (20), pp. 3723-3730, 2008.

G. Nath, K. Singh and D. K. Singh, “Chemical Analysis of Vermicomposts/Vermiwash of Different Combinations of Animal, Agro and Kitchen Wastesâ€, Australian Journal of Basic Applied Sciences 3 (4), pp. 3671-3676, 2009.

M. Gopal, A. Gupta, C. Palaniswami, R. Dhanapal and G. V Thomas, “Coconut leaf vermiwash: a bio-liquid from coconut leaf vermicompost for improving the crop production capacitiesâ€, Current Science, 98, pp. 1202-1210, 2010.

A. W. Zularisam, Z. Siti Zahirah, I. Zakaria, M. M Syukri, A. Anwar and M. Sakinah, “Production of fertilizer from Vermicomposting Process of Municipal Wasteâ€, Journal of Applied Sciences, 10 (7), pp. 580-584, 2010.

V. Palanichamy, B. Mitra, N. Reddy, M. Katiyar, R. B. Rajkumari, C. Ramalingam and Arangantham, “ Utilising Food Waste by Vermicomposting, Extracting Vermiwash, Castings and Increasing Relative Growth of Plantsâ€, International Journal of Chemical and Analytical Science, 2 (11), pp.1241-1246, 2011.

M. M. Manyuchi, A. Phiri, N. Chirinda, P. Muredzi, J. Govha and T. Sengudzwa, “Vermicomposting of Waste Corn Pulp Blended with Cow Dung Manure using Eisenia Fetidaâ€, World Academy of Science, Engineering and Technology, 68, pp. 1306-1309, 2012.

A. A. Ansari and K. Sukhraj, “Effect of vermiwash and vermicompost on soil parameters and productivity of okra (abelmoschus esculentus) in Guyanaâ€, Pakistan Journal Agriculture Resources, 23, pp. 137-142, 2010.

C. Sundaravadivelan, L. Isaiarasu, M. Manimuthu, P. Kumar, T. Kuberan and J. Anburaj, “Impact analysis and confirmative study of physico-chemical, nutritional and biochemical parameters of vermiwash produced from different leaf litters by using two earthworm speciesâ€, Journal of Agricultural Technology, 7 (5) , pp. 1443-1457, 2011.

G. Nath, K. Singh, “Effect of vermiwash of different vermicomposts on the kharif cropsâ€, Journal of Central European Agriculture, 13 (2), pp. 379-402, 2012.

S. Quaik, A. Embrandiri, P. F. Rupani, R. P. Singh and M. H. Ibrahim, “Effect of vermiwash and vermicompost leachate in hydroponics culture of Indian borage (Plectranthus ambionicus) plantletsâ€, 11th International Annual Symposium on Sustainability Science and Management, pp. 210-214, 2012.

G. Munroe, “Manual of On-Farm Vermicomposting and Vermicultureâ€, Organic Agriculture Centre of Canada, pp. 1-56.

T. Abbasi, S. Gajalakshmi and S. A. Abbasi, “Towards modelling and design of vermicomposting systems: Mechanisms of composting /vermicomposting and their implicationsâ€, Indian Journal of Biotechnology, 8, pp. 177-182, 2009.

H. Chaoui, “Vermicasting (or Vermicomposting): Processing Organic Wastes through Earthwormsâ€, Factsheet, ADGEX 743/537, 2010.




How to Cite

Manyuchi, M. M., Chitambwe, T., Muredzi, P., & Kanhukamwe, Q. (2013). Continuous Flow-through Vermireactor for Medium Scale Vermicomposting. Asian Journal of Engineering and Technology, 1(1). Retrieved from