不同杀菌条件对酒糟泥鳅品质的影响

以泥鳅为原料,采用米酒糟制的加工工艺制备酒糟泥鳅。探讨了不同杀菌条件对酒糟泥鳅色泽、质构、风味、菌落总数及感官评分的影响,并对酒糟泥鳅的营养成分和氨基酸组成进行了评价。结果显示,当杀菌温度115℃、时间15min,此时的酒糟泥鳅色泽鲜亮,酒香宜人,肉质酥软多汁,硬度和弹性均保持较好,感官得分85分。泥鳅经米酒糟制后,游离氨基酸总量显著高于新鲜泥鳅,其中甘氨酸、赖氨酸、精氨酸的含量提高了1倍以上,鲜味氨基酸和必需氨基酸的含量均提高20%以上。实验结果表明,泥鳅经米酒糟制处理后不仅味道更加鲜美,而且营养价值显著提高。     

Optimization by the simplex method of the separation of phenolic acids by high-performance liquid chromatography in wastewater olive and sugar beet vinasse

Optimization of a high-performance liquid chromatography separation has been developed for nine polyphenols by application of the simplex method. The nine polyphenols selected were mainly phenolic acids that can be present in wastewater and they can be removed by adsorption on activated carbon and resins. After the organic solvent (MeOH) had been chosen, a linear gradient in three stages and the furnace temperature were retained as parameters of optimization. The optimal conditions were determined by the super modified simplex and, in order to measure them a Chromatographic Response Function (CRF) was chosen. With the optimal conditions, the time of analysis was decreased from 69 to 40 min. The validation of the method was made on wastewater olive oil (WWOO) and sugar beet vinasse.     

胶束电动毛细管色谱-间接紫外检测法测定糖蜜酒精废液中的有机酸

建立了一种利用胶束电动毛细管色谱-间接紫外检测法同时测定丙二酸、甲酸、酒石酸、苹果酸、琥珀酸、戊二酸、乙酸、乳酸和谷氨酸的新方法。以7.5 mmol/L邻苯二甲酸氢钾-1.5 mmol/L十六烷基三甲基溴化铵(用0.1 mol/L氢氧化钠调pH至6.50)混合液作为电泳介质,检测波长为300 nm,参比波长为210 nm,未涂层弹性石英毛细管(50 μm i.d.×64 cm)为分离通道,在6 min内实现了9种酸的完全分离。9种有机酸的浓度与其峰面积在一定的范围呈良好的线性关系,检出限均低于1.5 mg/L,迁移时间和峰面积的日内、日间相对标准偏差均小于6%。该法用于糖蜜酒精废液中有机酸的测定,结果令人满意,9种有机酸的样品加标回收率均在93%以上。     

糖厂废醪液发热量的测定试验

用氧弹直接测定糖厂废醪液的发热量。结果是：平均原样发热量为１０４５７Ｊ／ｇ，干基发热量为１４９６９Ｊ／ｇ，相对标准偏差为０．３０％。表明酒清废液可作为燃料开发利用。     

糖蜜酒精废液脱钾树脂的解吸动力学

【目的】研究糖蜜酒精废液脱钾树脂BK-001中K~+的静态解吸过程。【方法】考察洗脱剂温度、浓度及树脂粒径对K~+解吸过程的影响,用动边界模型描述K~+的解吸过程。【结果】确定糖蜜酒精废液脱钾树脂BK-001中K~+的解吸过程为颗粒扩散控制,该反应的表观活化能为40.9kJ/mol,反应级数为1.19,表观频率因子为5.27×10~4 min~(-1),假二级动力学模型更适合描述K~+的解吸过程(R~20.995)。K+解析过程的总动力学方程式为1-3(1-F)~(2/3)+2(1-F)=5.27×104r20[H2SO4]~(1.19)e_((-4.09×10~4))/RT。【结论】脱钾树脂BK-001的解吸动力学方程为糖蜜酒精废液脱钾树脂的再生及钾盐资源的综合利用提供理论依据。     

Validation by Molecular Dynamics of the Major Components of Sugarcane Vinasse,On a Surface of Calcium Carbonate (Calcite)

There is ongoing interest in the alcohol industry to significantly reduce and/or add value to the liquid residue, vinasse, produced after the distillation and rectification of ethanol from sugar cane. Vinasse contains potassium, glycerol, and a protein component that can cause environmental issues if improperly disposed of. Currently, some industries have optimized their processes to reduce waste, and a significant proportion of vinasse is being considered for use as an additive in other industrial processes. In the manufacture of cement and asphalt, vinasse has been used in the mixtures at low concentrations, albeit with some physical and mechanical problems. This work is the first molecular approximation of the components of the sugar cane vinasse in an industrial context, and it provides atomic details of complex molecular events. In the current study, the major components of sugar cane vinasse, alone or complexed on the surface of calcium carbonate, were modeled and simulated using molecular dynamics. The results showed that the protein component, represented by the mannoprotein Mp1p, has a high affinity for forming hydrogen bonds with potassium and glycerol in the vinasse. Additionally, it provides atomic stability to the calcium carbonate surface, preserving the calcite crystalline structure in the same way potassium ions interact with the carbonate group through ion–dipole interactions to improve the cohesion of the modeled surface. On the contrary, when the glycerol molecule interacts with calcium carbonate using more than two hydrogen bonds, it triggers the breakdown of the crystalline structure of calcite expanding the ionic pair.