STUDY ON THE PRODUCTION OF SINGLE CELL PROTEIN OF PLEUROTUS MYCELIUM FROM RICE STRAW AND SUGARCANE BAGASSE

Abstract

The study aimed at using the ability of rapid growth of Pleurotus mushroom mycelia on rice straw and sugarcane bagasse to produce a single cell protein product which can be used as food for animal and aquaculture specieses. A screening on 3 foreign and 23 domestical strains showed that the Pleurotus sajor-caju gave the highest growth ability. The addition of 1% of urea increased remarkably the raw protein content of the mycelia to 12% in the case of sugarcane bagasse and 8,92% in the case of rice straw respectively. The addition of 1% of DAP also showed the highest growth ability. In order to increase the amino acid content of the product, a heat treatment (optimally at 50°C in 18 hrs) to induce the partial autolysis of the mycelia was applicable. Pilct-scale experiment on culture of Pleurotus sajor-caju mycelia showed that the optimal culture time, calcium hydroxide concentration and inoculate (spawn) volume were 6 days, 1-1,5% and 10%, respectively. A process for prodution of the mycelia product which could replace 20-30% of fish powder in the feed components was established.