At present alkaline proteases are widely used in the detergent, leather tanning, pharmaceutical, food, and feed processing industries. Although proteases are found in all living organisms (plant, animal, and microorganisms), the bulk of commercially important enzymes are from microorganisms. The aim of this study was to isolate protease producing bacteria, characterize the enzyme, and evaluate potential application as detergent additive to enhance the washing performance of endod berries. Different bacterial strains were isolated from soil and screened using an alkaline casein agar media. One isolate designated as aau 2106 was selected for further study because of its high proteoliytic activity, level of enzyme production and, ability to grow under solid state fermentation (SSF). Cultivation condition for the production of the enzyme under SSF, such as, moisture content, nitrogen content, and incubation period were optimized. The enzyme was active in the pH range of 6 to 10.5, temperature of 40 to 75. And optimum in; 96h incubation period, 1:1 ratio of moisture content and, casein in the production of enzyme under SSF and the enzyme was stable in the presence of endod and commercial detergents. The potential of the enzyme as a detergent additive was tested by adding the protease (57 U/g) in detergent formulations and used to clean pieces of cloth stained with blood and egg. Addition of the enzyme improved the cleaning efficiency of both endod and commercial detergents. This indicates that enzyme supplementation of endod could result in the development of an ecofriendly detergent.
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机译:目前碱性蛋白酶广泛用于洗涤剂,皮革晒黑,制药,食品和饲料加工行业。尽管在所有生物体(植物,动物和微生物)中发现蛋白酶,但是商业上重要酶的大部分来自微生物。本研究的目的是分离出蛋白酶产生细菌,表征酶,并评估潜在的应用作为洗涤剂添加剂,以增强Endod浆果的洗涤性能。从土壤中分离不同的细菌菌株并使用碱性酪蛋白琼脂培养基筛选。由于其高蛋白质活性,酶生产水平,以及在固态发酵(SSF)下生长的能力,选择了一个分析为AAU 2106的分离物进行进一步研究。优化了SSF下生产酶的培养条件,例如水分含量,氮含量和孵育期。酶在6至10.5的pH范围内活跃,温度为40至75。和最佳的; 96H孵育期,1:1水分含量的比例,酪蛋白在SSF下的生产中,在Endod和商业洗涤剂存在下稳定。通过在洗涤剂配方中加入蛋白酶(57 U / g)并用血液和鸡蛋清洁染色的布料来测试作为洗涤剂添加剂的酶的电位。添加酶改善了Endod和商业洗涤剂的清洁效率。这表明Endod的酶补充可能导致Ecofriendly洗涤剂的发展。
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