摘要
研究了解淀粉芽孢杆菌L536(Bacillus amyloliquefaciens L536)产生的γ-聚谷氨酸的絮凝特性。以高岭土悬浊液为絮凝介质,菌株L536产γ-PGA在中性pH范围内、投加量为1.2g/L时,对高岭土的絮凝率达最大。Fe2+、Ca2+、Cu2+、Fe3+、Al3+均能不同程度地提高γ-PGA对高岭土的絮凝活性。其中,Ca2+的助凝效果最为显著,其最佳助凝浓度为0.09mol/L。另外,菌株L536产γ-PGA对于活性炭、Ca(OH)2也表现出较强的絮凝活性。
Flocculating conditions of γ-PGA produced by Bacillus amyloliquefaciens L536 were investigated.The flocculating activity got highest at the γ-PGA concentration of 1.2g/ L and in the neutral pH.The flocculating activity was synergistically simulated by the addition of cations,Ca2＋ was the optimum cation that remarkably promoted the flocculating activity.The results showed that the optimum flocculation conditions were CaCl2 of 0.09mol/L.γ-PGA had a high flocculating activity to some organic and inorganic suspension.
出处
《酿酒》
CAS
2012年第1期98-100,共3页
Liquor Making
关键词
聚谷氨酸
生物絮凝剂
高岭土
絮凝条件
Poly （γ-glutamic acid）
bioflocculant
kaolin＇,flocculation conditions
