污水处理厂污泥含有丰富的蛋白质,但目前大部分没有进行很好地开发利用。本文利用污水处理厂脱水污泥经氢氧化钙水解后的蛋白液对平菇进行基施和喷施试验,测试其对平菇的菌丝生长、产量和生物学效率的影响。结果表明：污泥水解蛋白液能...污水处理厂污泥含有丰富的蛋白质,但目前大部分没有进行很好地开发利用。本文利用污水处理厂脱水污泥经氢氧化钙水解后的蛋白液对平菇进行基施和喷施试验,测试其对平菇的菌丝生长、产量和生物学效率的影响。结果表明：污泥水解蛋白液能促进平菇菌丝的生长,可提前5-6天出菇;当基施施用量为100 m L/袋时,平菇的生物学效率达到109.3%,增产率可达到25.9%;喷施1000倍污泥水解蛋白液时,平菇的生物学效率达到105.6%,增产率可达到21.6%。展开更多
The growth ofCandida utilis NRRL Y-1084 in acid and enzymatic hydrolysates of cassava peel and on glucose in a mineral salts medium was investigated in aerobic submerged cultivation. Kinetic and stoichiometric paramet...The growth ofCandida utilis NRRL Y-1084 in acid and enzymatic hydrolysates of cassava peel and on glucose in a mineral salts medium was investigated in aerobic submerged cultivation. Kinetic and stoichiometric parameters for growth were determined. The cardinal temperatures of this yeast strain were 14 ℃, 33 ℃ and 41 ℃. C. utilis exhibited no absolute requirement for growth factors, although its maximum specific growth rate （μmax） was higher in the mineral salts medium with yeast extract than without, but its biomass yield coefficient （Yx/s） did not differ much in these two media. In the enzymatic hydrolysate, its Yx/s value on sugar was 0.44 with a μmax of 0.35 h^-1, whereas the corresponding values were 0.52 and 0.48 h^-1 in the acid hydrolysate and 0.50 and 0.37 h^-1 in the mineral salts medium without yeast extract. The crude protein content of biomass grown in the glucose medium and the acid and enzymatic hydrolysates were 47.5%, 49.1% and 56.7%, respectively. The amino acid profile of the yeast biomass compared favourably with the FAO standard. Cassava peel hydrolysate has potential as a cheap carbohydrate feedstock for the production of yeast single cell protein by using C. utilis.展开更多
文摘污水处理厂污泥含有丰富的蛋白质,但目前大部分没有进行很好地开发利用。本文利用污水处理厂脱水污泥经氢氧化钙水解后的蛋白液对平菇进行基施和喷施试验,测试其对平菇的菌丝生长、产量和生物学效率的影响。结果表明：污泥水解蛋白液能促进平菇菌丝的生长,可提前5-6天出菇;当基施施用量为100 m L/袋时,平菇的生物学效率达到109.3%,增产率可达到25.9%;喷施1000倍污泥水解蛋白液时,平菇的生物学效率达到105.6%,增产率可达到21.6%。
文摘The growth ofCandida utilis NRRL Y-1084 in acid and enzymatic hydrolysates of cassava peel and on glucose in a mineral salts medium was investigated in aerobic submerged cultivation. Kinetic and stoichiometric parameters for growth were determined. The cardinal temperatures of this yeast strain were 14 ℃, 33 ℃ and 41 ℃. C. utilis exhibited no absolute requirement for growth factors, although its maximum specific growth rate （μmax） was higher in the mineral salts medium with yeast extract than without, but its biomass yield coefficient （Yx/s） did not differ much in these two media. In the enzymatic hydrolysate, its Yx/s value on sugar was 0.44 with a μmax of 0.35 h^-1, whereas the corresponding values were 0.52 and 0.48 h^-1 in the acid hydrolysate and 0.50 and 0.37 h^-1 in the mineral salts medium without yeast extract. The crude protein content of biomass grown in the glucose medium and the acid and enzymatic hydrolysates were 47.5%, 49.1% and 56.7%, respectively. The amino acid profile of the yeast biomass compared favourably with the FAO standard. Cassava peel hydrolysate has potential as a cheap carbohydrate feedstock for the production of yeast single cell protein by using C. utilis.
