江蓠酸化和漂白工艺的研究

THE TECHNOLOGY ON ACIDIFYING AND BLEACHING IN PROESSING OF GRACLARIA AGAR

本文报道了用江蓠提取琼胶过程中的酸化和漂白工艺的研究结果。试验表明:酸化浓度在25-40‰范围内都能有效地提取琼胶。兼顾到提高产率和强度两个方面,酸化浓度以35‰为宜。采用次氯酸钠漂白时可将漂白剂和酸混和进行酸化漂白,这种方法具有漂白快和节省漂白剂等优点。

1. One of the major factors which effect the yield of the graclaria. agar is theacid concentration at which in the range of 2 .5--4. 0% the product can be prepared.For reinforcing the strength of the products, the acid concentraction would beadjustcdat 2. 0--2.5%, and for increasing the productivity 4. 0--5. 0% would be selecled. Byballancing the reciprocal aid, 3. 5% is selected suitably. 2. The acidification processing operates under the given acid value duration issimple and the data is reliable as well as the good quality of products in copmaring tothe other methods. It would contribute to commercial scale of agar production. 3. In the extracting procoss the bleaching agent is mixes at first with acid andthen the acidification and bleach action take place at same time. Tt is characterised byrapid reaction speed, faster bleaching with lcss bleaching agents. The processing have been adopted by Lanhai Farm's Agar Laboratory Factory inHaikou and a good production with 21. 6% of average yield and 650 g/em^2 of averagestrength of the agar have been achieved.