Nghiên cứu một số yếu tố ảnh hưởng đến quá trình sản xuất bột trà hòa tan cỏ ngọt - tía tô.=Research on the factors affecting the production of stevia

Nghiên cứu một số yếu tố ảnh hưởng đến quá trình sản xuất bột trà hòa tan cỏ ngọt - tía tô.=Research on the factors affecting the production of stevia – perilla leaves instant tea powder.

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Tác giả: Thị Mai Hương Nguyễn

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Khoa học & Công nghệ (ĐH Kinh tế Kỹ thuật Công nghiệp), 2024

Mô tả vật lý: tr.21-29

Bộ sưu tập: Báo, Tạp chí

ID: 475856

Thêm vào giỏ

Nghiên cứu này được thực hiện nhằm tạo ra sản phẩm bột trà hòa tan cỏ ngọt – tía tô có chất lượng cao chứa nhiều hoạt chất sinh học có lợi cho sức khỏe người tiêu dùng và thuận tiện khi sử dụng. Quy trình được tiến hành như sau: cỏ ngọt và lá tía tô sau khi được thu hái sẽ tiến hành sấy khô ở 80oC trong 2 giờ (độ ẩm từ 5-7%), sau đó nghiền nhỏ với kích thước 0,5-0,6 cm. Phối trộn cỏ ngọt và lá tía tô theo tỉ lệ 0,25-1g/g. Tiếp theo trích ly dịch trà ở nhiệt độ 70oC trong 2 giờ, tỉ lệ nguyên liệu : nước là 1:30 g/ml và bổ sung maltodextrin 10% để làm chất trợ sấy.Tiến hành sấy phun ở nhiệt độ 170oC với tốc độ bơm nhập liệu 30% cho sản phẩm thu được ở dạng bột mịn, đồng nhất không vón cục, bột trà màu kem, có mùi thơm đặc trưng của lá tía tô và vị ngọt dịu của cỏ ngọt, bột trà thành phẩm có độ ẩm đạt 4,75% và hàm lượng polyphenol đạt 9,16% chất khô. Sản phẩm bột trà hòa tan cỏ ngọt – tía tô có chất lượng và khả năng hòa tan tốt.This research was conducted to create a high-quality stevia – perilla soluble tea powder product that contains many biologically active substances beneficial to consumers' health and convenient to use. The process is carried out as follows: After being harvested, stevia leaves and perilla leaves are dried at 80oC for 2 hours (moisture to 5-7%), and then crushed to a size of 0.5-0.6 cm. Mix stevia and perilla leaf in a ratio of 0.25-1(g/g). Next, extract the tea solution at a temperature of 70oC for 2 hours, the ratio of ingredients: water is 1:30 (g/ml) and add 10% maltodextrin as a drying aid. Proceed with spray drying at a temperature of 170oC with input pump speed 30% gives a product in the form of a fine, uniform, lump-free powder, cream-colored tea powder, with the characteristic aroma of perilla leaves and the gentle sweetness of stevia, the tea powder has a moisture content of 4.75% and a polyphenol content of 9.16% dry matter. The stevia - perilla leaf soluble instant tea powder product has good quality and solubility.

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