泡沫分离法分离纯化无患子皂苷的研究

采用泡沫分离法分离纯化无患子皂苷溶液,收集溢出分离柱的泡沫液,采用紫外分光光度计分别测定原液和泡沫液的皂苷含量,通过富集比、回收率以及纯度表征分离效果。结果表明:在进料浓度为 2.0 g/L、进料量为 150 mL、气速为 32 L/h、温度为 30 ℃、pH值为4.3条件下,富集比可达到2.153,收率与纯度分别达到 79.19 % 和 74.68 %。     

泡沫分离法分离桔梗皂苷的工艺研究

采用间歇式泡沫分离法对桔梗提取液中的桔梗皂苷予以分离工艺条件研究;实验以富集比、回收率以及带液率为指标衡量分离效果,在单因素试验基础上,通过正交试验法,获得桔梗皂苷的最佳分离条件。结果表明分离桔梗皂苷的最佳工艺条件为:进料浓度0.014 mg/m L,气体流速700 m L/min,温度30℃,表面活性剂用量(0.505 mg/m L)30 m L,回收率为77.58%,富集比为2.50,带液率为21.67%。因此泡沫分离桔梗皂苷是一种简单、有效、可行的分离方法。     

泡沫分离法纯化十二烷基硫酸钠的研究

用泡沫分离法 ,纯化了十二烷基硫酸钠 (SDS) ,并通过红外光谱、熔点测定、表面张力 -表面活性剂浓度的对数 (γ- lgc)曲线的分析 ,确证了 SDS的纯度。     

氯气-泡沫分离法处理水合肼生产废水

采用氯气-泡沫分离法处理尿素氧化法水合肼生产废水,考察了pH值、氯气投加量、废水循环处理时间等因素对处理效果的影响。试验结果表明,在pH值为11.0、氯气投加量为400 mg/L、废水循环处理时间为2 h的最佳工艺条件下,废水经氧化、分离处理后,NH3-N、CODCr含量大幅度削减,其去除率分别达到94.35%、96.07%。     

泡沫分离法处理洗车废水中LAS的试验研究

考察了泡沫分离法去除洗车废水中LAS的效能。单极泡沫分离法对进水LAS小于55 mg/L废水的最高去除率可达94%。在一定气液比下,进水LAS浓度越高,去除率越高,但气液比超过12∶1时,LAS浓度对去除率影响有限。通过对2～5级泡沫分离法处理洗车废水的试验结果进行比较,证明三级泡沫分离法去除效果最佳。当进水LAS为30 mg/L,停留时间25 min,气液比为12∶1时,LAS去除率达到98.4%,出水达到洗车废水回用标准。     

微藻细胞的连续泡沫分离法采收

为考察连续泡沫分离法采收微藻细胞的可行性 ,在一种斜臂泡沫分离装置上 ,以螺旋藻为模型藻种 ,较为详细地研究了载气流率、藻液进料流率、浓度、pH值、离子强度、乙醇浓度、进料位置、泡沫段与液相段高度之比等因素对泡载采收性能的影响。结果表明 :在载气流率、藻液进料流率或藻液浓度较低时采收性能良好 ;当 pH值为 11、离子强度为 1 3× 10 ⁴ μs·cm^-1、乙醇浓度为 3%(体积 )时泡载收率可达 2 5 %～ 45 %;采用泡沫相段进料有利于提高泡载采收性能。提出的连续泡载采收动力学模型与实验值拟合较好 .     

泡沫浮选分离法的最新发展动态

泡沫分离是根据吸附的原理,向含表面活性物质的液体中鼓泡,使液体内的表面活性物质聚集在气液界面上,在液体主体上方形成泡沫层,将泡沫层和液相主体分开,就可以达到浓缩表面活性物质和净化液相主体的目的。泡沫分离是以气泡作分离介质来浓集表面活性物质的一种新型分离技术。本文注重介绍了泡沫浮选分离法的发展历史及其发展状况,另外也论述了其最新的发展动态,以及其优缺点。     

常温超高压提取人参总皂苷

在常温条件下使用超高压提取了人参皂苷;采用均匀设计法对提取工艺条件作了优化;常温超高压提取人参皂苷最优工艺条件为：溶剂50%乙醇、压力200 MPa、固（g）液（ml）比1∶100、提取时间1 min;提取收率为7.32%.与煎煮法、回流提取法、超声提取法、超临界CO2提取等方法做了比较,结果表明常温超高压提取具有提取温度低（常温）、提取时间短、提取得率高、能耗低、绿色环保等优点,为人参皂苷的提取提供了一种新技术、新工艺.     

人参香皂中人参总皂苷含量的测定

采用超声提取法对人参香皂中的人参总皂苷进行提取,溶剂萃取法对人参总皂苷进行纯化,用香草醛-高氯酸比色法对纯化后样品进行了人参总皂苷含量的测定,检测波长为540 nm。实验结果表明,香草醛-高氯酸比色法在0.02~0.24 mg内线性关系良好(r=0.999 5),平均回收率为96.04%,RSD为2.29%(n=5)。所测6种人参香皂中人参总皂苷的质量分数为1.72~9.66 mg·g-1。     

Protein Recovery from Sweet Potato Starch Wastewater by Foam Separation

In this study, an inclined foam separation column was designed to effectively recover protein from sweet potato starch wastewater. The effects of the influent protein concentration, pH, air flow rate, influent volume, foaming time, and inclined column angle on foam separation performance were assessed. The optimum foam separation conditions consisted of influent protein concentration 4.51 mg/mL, pH 4, air flow rate 0.15 mL/min, influent volume 500 mL, foaming time 100 min, and inclined column angle 30°. In these conditions, protein recovery percentage and enrichment ratios were 84.1% and 1.3, respectively. The biochemical oxygen demand (BOD₅) and chemical oxygen demand (COD_Cr) of the residual solution (620 and 950 mg/mL, respectively) were lower than those of the original (influent) solution.     

Study on Riboflavin Recovery from Wastewater by a Batch Foam Separation Process

Abstract

A batch recovery of riboflavin via foam separation from industrial simulative wastewater was studied using a cationic surfactant, cetyltrimethyl ammonium bromide (CTAB). The experimental parameters examined were the surfactant concentration, air flow rate, pH, and foam height. Under optimal operating conditions obtained through an orthogonal experiment, the maximum enrichment ratio of 48.7 was achieved for riboflavin along with 99.3% removal efficiency. The optimal operating conditions had the concentration of CTAB at 0.3 g/L, air flow rate at 400 ml/min, foam height at 90 cm, and pH at 12. Therefore foam separation proved to be an effective method to recover the riboflavin in terms of the good enrichment and removal efficiency.     

温度对高浓度SDS水溶液泡沫稳定性及分离的影响

高浓度表面活性物质的分离是泡沫分离过程的难题,也是制约泡沫分离技术应用于工业化生产的瓶颈.为了解决高浓度表面活性物质泡沫分离的难题,以阴离子表面活性剂十二烷基硫酸钠(SDS)水溶液为体系,研究了在其临界胶束浓度(CMC)附近时,温度对SDS水溶液气泡直径、泡沫稳定性、富集比及回收率的影响.结果表明:温度对高浓度表面活性物质的泡沫分离有显著影响.当SDS水溶液浓度分别为1.2、2.3、3.5g·L-1,温度从30℃升高到70℃时,泡沫稳定性先增大后减小,在pH 6.9、表观气速2.4×10-3 m·s-1、装液量200 mL的操作条件下,气泡直径先减小后增大,富集比提高了3～5倍,回收率降低了34％～65％.     

泡沫分离法的应用与发展

综述了近年来泡沫分离法的研究进展,并对非泡沫分离,泡沫分离进行文献评述,主要介绍了泡沫分离在固体粒子,溶液中的离子,分子以及生物产品的分离方面的应用,指出了泡沫分离目前存在的问题及发展方向。     

泡沫分离技术在蛋白质多元体系分离中的应用

综述了泡沫分离蛋白质与糖,蛋白质与表面活性剂以及不同蛋白质的混合体系的研究进展,分析了泡沫分离技术在蛋白质分离中应用的前景并提出了需要解决的问题。     

泡沫分离法的现状与研究进展

本文依据近年来有关泡沫分离的报道,介绍了泡沫分离的模型以及近年来的应用进展,并提出了若干需要深入研究的问题。     

盐藻细胞泡载分离法采收的初步研究

通过对盐藻细胞的浓缩倍数和采收率的测定，考察了藻液pH值、气体流速(vg)、藻细胞初始浓度(C0)对盐藻细胞的泡载分离采收性能的影响，优化了盐藻细胞泡载分离采收条件. 结果表明：在vg为60 ml/min，C0为2.58?105 个/ml，pH值为7.5的条件下，盐藻细胞泡载分离的采收率达90%~94%，浓缩倍数达30~34. 泡载分离是分离浓缩盐藻细胞的一种简便、高效的方法.     

Separation of Tea Saponin by Two-Stage Continuous Foam Fractionation

A technology of two-stage continuous foam fractionation for tea saponin recovery was studied for increasing both the enrichment ratio and the recovery percentage. In the first stage, the effect of air flow rate, the initial pH, the feed flow rate, and the feed position were studied at a temperature of 60°C. The results showed that when the conditions of the first stage were at a temperature of 60°C, air flow rate 150 mL/min, pH 5.3, feed flow rate 1.92 mL/min, and feed position at the interface between the liquid phase and the foam phase, the enrichment ratio, and the recovery percentage of tea saponin were 4.02 and 56.4%, respectively, and the effluent solution was added to the second stage as the initial solution. When the conditions of the second stage were at a temperature of 30°C and an air flow rate of 300 mL/min, the recovery percentage of tea saponin reached 47.6%, and the foamate was added to the first stage as feed solution. The total recovery percentage of tea saponin reached 86.3% by the two-stage continuous foam fractionation.     

Study on Streptomycin Sulfate Recovery by Batch Foam Separation

The feasibility of foam separation as a technique was assessed for the recovery of streptomycin sulfate from the waste solution by using an anionic surfactant sodium dodecyl sulfate (SDS). The experimental parameters examined were SDS concentration, superficial gas velocity, initial pH, and liquid loading volume. The results showed that sodium dodecyl sulfate as the surfactant for foam separation had good foaming quality and could effectively concentrate streptomycin sulfate of the aqueous solution by technology of foam separation. The enrichment ratio and the recovery rate of streptomycin sulfate were 4.0 and 85%, respectively under the best operating conditions of sodium dodecyl sulfate concentration 0.4 g/L, superficial gas velocity 300 mL/min, liquid loading volume 300 mL and initial pH 6.0 when streptomycin sulfate concentration was 0.5 g/L.