通过对大豆分离蛋白-磷脂酶解产物乳状体系的共建,探究不同磷脂酶A1,A2,C,D酶解磷脂对乳化体系乳化性质的影响,测定添加不同磷脂酶解产物后蛋白乳化体系的可溶性蛋白含量、乳化活性、乳化稳定性、乳层析指数、Zeta电位、粒径分布、光学...通过对大豆分离蛋白-磷脂酶解产物乳状体系的共建,探究不同磷脂酶A1,A2,C,D酶解磷脂对乳化体系乳化性质的影响,测定添加不同磷脂酶解产物后蛋白乳化体系的可溶性蛋白含量、乳化活性、乳化稳定性、乳层析指数、Zeta电位、粒径分布、光学显微镜的变化。结果表明,磷脂酶解产物与大豆分离蛋白有明显的交互作用,其中磷脂经磷脂酶A2酶解后的产物与大豆分离蛋白共建的乳化体系,在乳化活性、稳定性、粒径分布、Zeta电位、显微结构方面均好于其它复合体系。其乳化活性提高10.17 m2/g,稳定性提高25.2%,负Zeta电位绝对值增加5.09 m V,乳状液平均粒径明显变小,显微结构乳滴分布均匀。这表明经磷脂酶A2酶解后的磷脂非极性基团减少,亲水性增强,与蛋白交互作用增强,使蛋白更好的结合到磷脂的片层结构中,改变复合物结构,促进乳化体系稳定。展开更多
Wastewaters from slaughterhouses are characterized by a high concentration of oils and greases that can cause problems in conventional treatments. The degradation of difficult pollutants in more easily degradable prod...Wastewaters from slaughterhouses are characterized by a high concentration of oils and greases that can cause problems in conventional treatments. The degradation of difficult pollutants in more easily degradable products can be mediated by enzymes. Enzymatic hydrolysis facilitates the biodegradation because it makes the organic material is made available as compounds of lower molecular weight, the lipids being made available in the form of free fatty acids. The application of enzymes as processing aids in wastewater treatment has some advantages, such as the specificity that allows control of the products, which leads to increased income generation for the non-toxic byproducts and moderate conditions of operation. The objective of this work was optimizing the conditions for lipids enzymatic hydrolysis present in swine slaughterhouse wastewaters using lipolytic enzymes and subsequent biological treatment study. Temperature, pH and enzyme concentration were the variables tested. The enzymes showed good activity and could therefore be used for the hydrolysis process proposed here. The optimized conditions to maximize the release of fatty acids were: temperature of 36 ℃, pH 8.5 and enzyme concentration of 1.1%, yielding fatty acids in the order of 31.50μmol/mL for lipase and 31.13 μmol/mL for phospholipase. All variables influenced the release of fatty acids. The maximum yield of biogas was 89.65 mL in the reactor added the sludge, raw wastewater and phospholipase in the conditions optimized the hydrolysis step, obtaining a chemical oxygen demand (COD) reduction of 90.01% in relation to the value of the COD of the raw wastewater.展开更多
文摘通过对大豆分离蛋白-磷脂酶解产物乳状体系的共建,探究不同磷脂酶A1,A2,C,D酶解磷脂对乳化体系乳化性质的影响,测定添加不同磷脂酶解产物后蛋白乳化体系的可溶性蛋白含量、乳化活性、乳化稳定性、乳层析指数、Zeta电位、粒径分布、光学显微镜的变化。结果表明,磷脂酶解产物与大豆分离蛋白有明显的交互作用,其中磷脂经磷脂酶A2酶解后的产物与大豆分离蛋白共建的乳化体系,在乳化活性、稳定性、粒径分布、Zeta电位、显微结构方面均好于其它复合体系。其乳化活性提高10.17 m2/g,稳定性提高25.2%,负Zeta电位绝对值增加5.09 m V,乳状液平均粒径明显变小,显微结构乳滴分布均匀。这表明经磷脂酶A2酶解后的磷脂非极性基团减少,亲水性增强,与蛋白交互作用增强,使蛋白更好的结合到磷脂的片层结构中,改变复合物结构,促进乳化体系稳定。
文摘Wastewaters from slaughterhouses are characterized by a high concentration of oils and greases that can cause problems in conventional treatments. The degradation of difficult pollutants in more easily degradable products can be mediated by enzymes. Enzymatic hydrolysis facilitates the biodegradation because it makes the organic material is made available as compounds of lower molecular weight, the lipids being made available in the form of free fatty acids. The application of enzymes as processing aids in wastewater treatment has some advantages, such as the specificity that allows control of the products, which leads to increased income generation for the non-toxic byproducts and moderate conditions of operation. The objective of this work was optimizing the conditions for lipids enzymatic hydrolysis present in swine slaughterhouse wastewaters using lipolytic enzymes and subsequent biological treatment study. Temperature, pH and enzyme concentration were the variables tested. The enzymes showed good activity and could therefore be used for the hydrolysis process proposed here. The optimized conditions to maximize the release of fatty acids were: temperature of 36 ℃, pH 8.5 and enzyme concentration of 1.1%, yielding fatty acids in the order of 31.50μmol/mL for lipase and 31.13 μmol/mL for phospholipase. All variables influenced the release of fatty acids. The maximum yield of biogas was 89.65 mL in the reactor added the sludge, raw wastewater and phospholipase in the conditions optimized the hydrolysis step, obtaining a chemical oxygen demand (COD) reduction of 90.01% in relation to the value of the COD of the raw wastewater.