曲霉对杨梅栲胶溶液的微生物降解  

Biodegradation of Bayberry Extract by Aspergillus

作　　者：简晓昀[1] 滕博[1] 周南[1] 张金伟[1] 陈武勇[1,2] 

机构地区：[1]四川大学皮革化学与工程教育部重点实验室,四川成都610065 [2]四川大学制革清洁技术国家工程实验室,四川成都610065

出　　处：《皮革科学与工程》2016年第2期5-8,共4页Leather Science and Engineering

基　　金：教育部博士点基金(20130181130009)

摘　　要：为了研究微生物对杨梅栲胶的降解作用,利用杨梅栲胶在自然条件下染菌,并对降解菌株进行分离筛选和鉴定,以降解效果最好的一种菌株(其COD去除率为18.50%)对杨梅栲胶溶液进行降解,并对降解前后栲胶溶液的Zeta电位、粒径、电导率、p H等电化学性质进行了测定。利用普鲁士蓝法及正丁醇-盐酸法对溶液的总酚及可溶性缩合单宁的含量进行测定。利用傅里叶红外光谱仪对栲胶分子的结构变化进行初步分析。结果表明,该菌株为曲霉属,降解后栲胶溶液中的总酚及可溶性缩合单宁的含量均有所降低,溶液的Zeta电位绝对值升高,粒径减小,稳定性提高,电导率降低,p H值升高。红外图谱显示杨梅单宁分子结构在降解前后无明显变化。Degradation strains were isolated from Bayberry extract solution under nature condition.One high effective strain was selected for degradation of Bayberry extract solution（18.50% COD removal rate）. Electrochemical properties including Zeta potential, size, conductivities, p H were measured after degradation. The simple phenolics and polyflavonoids were investigated with Prussian blue method and butanol-acid method. Preliminary analysis of Bayberry extractstructural character was investigated through a Fourier transformed infrared spectra.The results showed that, the degradation strain was Aspergillus. phenolics in the extract solution were decreased. Stability of extract solution was increased with the increase of zeta potential absolute values and decrease of size. Furthermore, conductivities was decreased and p H was increased. And FT-IR spectra showed that the molecular structure of Bayberry tannin is almost the same after biodegradation.

关 键 词：杨梅栲胶 生物降解 菌种鉴定 曲霉 COD去除率 

分 类 号：TQ94[化学工程]