FIELD: process engineering.
SUBSTANCE: invention relates to complex treatment and recovery of fish wastes for production of organic fertilisers. Proposed method comprises loading the mix of organic wastes in reactor, heating it and anaerobic fermentation. Fish press water is used as said mix of organic wastes. Said press water is heated to 80-90° is separated to suppress and extract residual fish oil. Liquid fraction is loaded into reactor for anaerobic fermentation at 50-55°C at constant mixing for 2-3 weeks. Obtained liquid fertiliser is fed into cooling reactor wherein oxygen ingress is either partially limited or completely inhibited. Temperature id reduced for 2 days to 0°C to minus 10°C. Thereafter, fertiliser is packed.
EFFECT: higher quality of finished products, better ecology.
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