Japan uses food waste water to produce bacterial proteins

Japan uses waste residue from food processing to produce microbial protein, which is rich in protein, amino acids, vitamins, and other nutrients. It can be used as a high-quality beverage additive or feed in fish, poultry, livestock, and other feeds, and can be found for waste conversion. There are effective ways for social, economic and environmental benefits.
■ Bacterial protein production from pineapple residue Using pineapple residue as raw material, single cell protein was produced from P. globosa P47 under light and aerobic conditions (37°C, pH 7). 100g / l of total sugar can be obtained 26.5g / L dry cell body, that is, 1g of total sugar available 0.45g / dry cells, microbial protein content of 66.6%, also rich in vitamin B127. 9mg/100g dry cell body, vitamin E 21mg/100g dry cell body, carotenoid 80mg/100g dry cell body.
â–  Aspergillus TK41, TK42 and TK2 were used as the microbial protein in starch slag production. K2HPO4 (potassium phosphate dibasic) 1%, ammonium sulfate 1% and urea 1% were added to the potato starch powder residue for solid fermentation. The nitrogen content of the microorganisms and the microbial biomass produced by the three Aspergillus strains reached 14.5%, 12.9%, and 11.4%, respectively.
After the sweet potato starch slag (ie, the residue after sweet potato starch processing) was added with K2HPO 41%, ammonium sulfate 1% and urea 1%, the protein content in the bacteria reached 16.1% and 16.1%, respectively. 14.9%.
■ Fish miscellaneous residue production The bacterial protein uses miscellaneous residues (fish processing waste) as raw materials, and mixed fermentation with Aspergillus oryzae, Aspergillus sojae, and Saccharomyces cerevisiae 1FO2114 results in a low-peroxide fat fermented fish meal. The fishmeal produced by fermenting (30°C for 16hr) with a large fermenter is very effective.
■ Rice slag production Bacterial protein rice slag refers to the residue of sugar produced by rice, which is rich in protein (about 50% of new dry matter). Based on the rice slag, the production of yeast can increase the bacterial protein content in rice slag. 5 %～15%, a new source of feed protein, rich in vitamin B1, full amino acid composition, high protein utilization rate (about 80%), nutritional value and fish meal, digestible, good palatability, can replace fish meal Use, can also be used as high-quality feed additives, especially young animals and dyspeptic animals have better feeding effect.
■ Pulp wastewater production Yeast protein pulp wastewater contains 1.1% xylan, and A. pullulans isolate IFO6353, using pulp wastewater, can be used in pulp wastewater at pH 6.0-6.5 and 29°C. Good growth and development, strong decomposition of xylan. If another 0.25% yeast extract is added and the cell culture is performed, 7.5 g/L of bacterial cells can be obtained.
â–  Monosodium glutamate wastewater production Yeast protein monosodium glutamate wastewater contains a large amount of glutamic acid bacteria protein, containing amino acid nutrients such as residual sugar and glutamic acid. The feed yeast can be used for ventilation culture, and residual sugar and amino acids in the wastewater can be fully utilized. The conversion of nutrients to yeast protein not only reduces the COD in the wastewater (reduction rate of 60% to 70%, COD, chemical oxygen consumption, pollution of environmental substances), yeast yield is about 1.3%, yeast is rich in protein ( 40%), rich in B vitamins, 16 kinds of amino acids, for high-quality feed, can replace fish meal, do fish and livestock feed.
■Distillation wastewater production Yeast protein shochu distillation wastewater can directly produce microbial bacterial protein feed. The production strain is AspergillusawamoriVarkeawachii, which is cultured in a fermentor at 35°C for 24 hours with aeration, and the concentration of bacterial cells reaches 4.3%. (F) Protein content of more than 35%, containing 9.9% crude fat, 19.0% carbohydrate, 26.7% fiber, digestibility for pig feed up to 52% to 62%. The viscous distilled liquor after cultured by microorganisms has a viscosity reduction of more than 90%. Solids and liquids are easily separated, and the waste in the waste water is greatly reduced, which facilitates further post-treatment.