苎麻的厌氧微生物脱胶条件试验

Studies on Ramie Degumming by Anaerobic Microorganism

研究了一种苎麻生物脱胶方法—厌氧微生物法。研究发现厌氧菌株脱胶的最适温度范围为30℃～35℃,最适pH为7 0;细菌浓度为3×109个·ml-1以上时,脱胶时间在3天以内;在回调苎麻脱胶菌液pH条件下,菌液的重复使用次数为2～4次。通过联合脱胶试验,原麻经碱煮后敲麻再进行生物发酵,脱胶效果较好,残胶率达3 45%;碱煮时间6小时的比4小时好;碱浓度7 5g·L-1与10g·L-1的处理效果则差异不大;先生物处理后化学处理与先化学处理后生物处理相比,前者有更好的效果,处理3天,残胶率为2 53%。

A method for ramie degumming by anaerobic microorganism was conducted. The optimum pH and temperature of degumming were 70 and 30℃～35℃, the degumming time was about 3 days when the numbers of bacteria above 3×109·mL-1 and the culture fluid could be used 2～4 times when pH was regulated to optimal value. Combining of microbial with the chemical method in ramie degumming shown the good results , and the rate of remained gum was 345%, the degumming of boiling with alkali for 6 hours was better than that for 4 hours, and there was little difference between the concentrations of alkali 75g·L-1 and 10g·L-1. Compared with the method the microbial treatment after the chemical treatment, the results of the microbial treatment before the chemical treatment was better, and the rate of remain gum was 253% after 3 days treatment.