A study of different strategies for treating pig manure to make organic fertilizer and improve the environment

Nguyen Minh Thong

Cantho University, Cantho City, Vietnam
nmthong@ctu.edu.vn

 Abstract     

 One on-farm trial was carried out in farmers’ households of Phung Hiep district, Hau Giang Province of Vietnam to evaluate different treatments of pig manure to produce compost.  It was a complete  randomized  design with 3 treatments and 3 replicates. The treatments were pig manure, straw and Trichoderma fungi under aerobic condition;  pig manure and straw under aerobic condition; pig manure and straw under anaerobic composting.

The results showed that the temperature of all composted batches were over 50 ^oC, which could eliminate different disease organisms and parasite eggs. Eggs of Ascaris suum were killed 100% after 6 weeks of composting and numbers of Coliform and E.Coli in the treatments were reduced; Coliform numbers were 313 x 10⁶ before and 0,051 x 10⁶ after 6 weeks; E. Coli were 162 x 10⁶ and 0,003 x 10⁶  before and after 6 weeks, respectively. The conclusion was that using the composts from the different treatment strategies could be safe for crops and humans with better environmental impact.

Keywords: compost, pig manure, rice straw, pathogen, parasite eggs.