亚洲免费av电影一区二区三区,日韩爱爱视频,51精品视频一区二区三区,91视频爱爱,日韩欧美在线播放视频,中文字幕少妇AV,亚洲电影中文字幕,久久久久亚洲av成人网址,久久综合视频网站,国产在线不卡免费播放

        ?

        TheExtractionofLacticAcidfromFermentative MarigoldWastewater

        2013-08-16 06:20:34JIANGChuanshiZHANGHuiCUIZhenleiYUHeweiHANJiqing
        山東工業(yè)技術(shù) 2013年10期
        關(guān)鍵詞:青島大學(xué)青島山東

        JIANG Chuan-shi ZHANG Hui CUI Zhen-lei YU He-wei HAN Ji-qing

        (青島大學(xué) 化學(xué)化工與環(huán)境學(xué)院,山東 青島266071)

        0 Introduction

        Marigold is an herb of ancient medicinal repute. It grows as a wild and common garden plant throughout Europe, North America and Asia.[1]Lutein has been reported in epidemiological studies that lutein reduces the risk of some chronic diseases such as cancer, heart disease and agerelated eye diseases.[2]A lot of wastewater is generated during the extraction of lutein from marigold process. lactic acid ,which contained in the wastewater, is widely used in food additives, feed sour agents and nutritional supplements.[3]

        1 Materials and methods

        1.1 Materials

        Fermentative marigold wastewater come (Heilongjiang Leader Biotechnology Co.,Ltd)

        Lactic acid(Content 80%-95%),Active carbon,Polyaluminium chloride,Ca(OH)2(content≥93%),H3PO4(AR), N-butyl alcohol(AR), Isopropyl ether(AR), chloroform(AR)

        1.2 Methods

        1.2.1 Organic solvent extraction method

        Wastewater, of which the pH is adjusted by acid, is extracted three times with organic solvent and then concentrated by evaporation to obtain lactic acid.

        1.2.2 Ca(OH)2neutralization method

        Active carbon was added to the wastewater(pH6 or pH7, adjusted by Ca (OH)2). After that adding organic solvent to the solution and then concentrated by evaporation. The calcium lactate was got finally.

        1.2.3 Flocculation method

        Polyaluminium chloride was added to the wastewater. After long-time stirring filter,carbon was added and then concentrated by evaporation.The lactic acid was got finally.

        2 Results and discussion

        2.1 Calculation of lactic acid

        Under certain condition, the content of lactic acid and it’s refractive index is proportional in solution, so the content of lactic acid in solution can be measured by abbe refractometer. The of lactic acid in solution can be calculated by the follow equation:

        η=(n-1.3330)×1000

        η——Content of lactic acid(%)

        n——Refractive index

        2.2 Organic solvent extraction method

        Extracting 200mL of wastewater by using 200mL of isopropyl ether for three times. The organic phase was concentrated by evaporation and 2.5mL of lactic acid was got finally. The content of lactic acid in the production is 45%.

        Extracting 200mL of wastewater by using 200mL of chloroform for three times. The organic phase was concentrated by evaporation and 5mL of lactic acid was got finally. The content of lactic acid in the production is 13.4%.

        Extracting 200mL of wastewater by using 200mL of n-butyl alcohol for three times. The organic phase was concentrated by evaporation and 3mL of lactic acid was got finally. The content of lactic acid in the production is 76.1%.

        Three kinds of organic solvent are used in the experiment, which are isopropyl ether, chloroform and n-butyl alcohol. Concluded from data, nbutyl alcohol is the best. But a lot of n-butyl alcohol is used, it is bad for environment.

        2.3 Ca(OH)2 neutralization method

        Ca(OH)2was added dropwise into 100mL of wastewater to adjust the solution to pH6 or pH7 at 35℃. 2g of active carbon was added to bleach.The filtration was concentrated by evaporation, and 0.5g of calcium lactate was got finally.

        2.4 Flocculation method

        0.25g of polyaluminium chloride was added to 100mL of wastewater,then stired the solution for 1h at 35℃.After that centrifuged the liquid for 10 minute. 0.5g of active carbon was added to bleach for 1.5h at 40℃,The filtration was concentrated by evaporation, and 13ml of lactic acid was got finally.

        The content of lactic acid in experimental procedure was recorded in table 1.

        Table 1 The content of lactic acid in experimental procedure

        Derived from the table, bleach and flocculation have low influence on the content of lactic acid, and the content of lactic acid in the production is high.

        3 Conclusions

        Extraction by using organic solvent will get high-purity production but low recovery. At the same time, the organic solvents will pollute the environment. The method of Ca(OH)2neutralization is environmental, but the recovery of calcium lactate is low.

        The method of flocculation can get high-purity production and the recovery is high. It is also environmental. Compared to other sewage treatment, this method can obtain lactic acid from wastewater. This method will be widely used in the sewage treatment from fermentative marigold flower in the future.

        [1]Gonzalez de Mejia,E.,Loarca-Pina,G.,&Ramos-Gomez,M.(1997). Antimutagenicity of xanthophylls present in aztec marigold (Tagetes erecta)against 1-nitropyrene[J].Mutation Research,389,219-226.

        [2]Slattery, M. L., Benson, J., Curtin, K., Ma, K. N., Schaeffer, D., &Potter, J. D.(2000). Carotenoids and colon cancer[J].American Journal of Clinical Nutrition, 71,575-582.

        [3]J.B. Chaudhuri, D.L. Phyle, Emulsion liquid membrane extraction of organicacids. I. A theoretical model for lactic acid extraction with emulsion swelling, Chem. Eng[J]. Sci. 47 (1992) 41-48.

        猜你喜歡
        青島大學(xué)青島山東
        圖說山東
        新航空(2023年9期)2023-09-18 18:59:16
        青島大學(xué)
        逆勢(shì)上揚(yáng)的山東,再出發(fā)
        金橋(2022年3期)2022-03-29 01:16:24
        『山東艦』入列一周年
        Research on Measures to Improve the Performance of Basic Pension Insurance Funds in China
        Research on Prevention of Corruption from thePerspective of Power List
        青島大學(xué)再建始末
        商周刊(2018年25期)2019-01-08 03:31:10
        上合,從青島再啟航
        金橋(2018年7期)2018-09-25 02:28:14
        青島如何引進(jìn)人才
        商周刊(2018年10期)2018-06-06 03:04:10
        山東的路幸福的路
        中國公路(2017年14期)2017-09-26 11:51:39
        国产九色AV刺激露脸对白| 精品在线视频在线视频在线视频| 男女射精视频在线观看网站| 包皮上有一点一点白色的| 国产精品无码无卡无需播放器| 免费观看成人欧美www色| 亚洲一区二区三区av无码| 国产乱妇乱子在线播视频播放网站| 欧美成人片一区二区三区| 欧美亚洲精品一区二区| 日本少妇被爽到高潮的免费| 少妇太爽了在线观看| 国产国语对白一区二区三区| 国产高清一区在线观看| 久草视频在线视频手机在线观看| 91热久久免费频精品99| 青青草成人免费在线视频| 精品久久人妻av中文字幕| 国产成年无码v片在线| 国产成人免费a在线视频| 国产精品人成在线观看| 国产91精品一区二区麻豆亚洲| 偷拍色图一区二区三区| av色综合久久天堂av色综合在| 亚洲 自拍 另类小说综合图区| 999久久久国产精品| 国产精品麻豆最新AV| 亚洲欧洲无码精品ⅤA| 少妇性l交大片免费1一少| 亚洲日本人妻少妇中文字幕| 日本视频精品一区二区| 福利一区视频| 丰满少妇高潮在线观看| 国产精品国产三级国产在线观 | 欧美三级不卡视频| 久久国产精品免费一区六九堂| 亚洲成在人网站天堂日本| 日韩熟女系列中文字幕| 九九久久99综合一区二区| 天码av无码一区二区三区四区| 无码 制服 丝袜 国产 另类|