生物讲解技术产生微生物的使用 - 常见问题

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生物讲解技术产生微生物的使用

生物讲解技术产生微生物的使用

来源网址:http://www.rsoau.com 2020-06-04 15:15:32    

在自然界如土壤和/或沙土等条件下,和/或特定条件如堆肥化条件下或厌氧消化条件下或水性培养液中,由自然界存在的微生物如细菌、霉菌和海藻等作用引起降解,并更终完全降解变成二氧化碳(CO2)或/和甲烷(CH4)、水(H2O)及其所含元素的矿化无机盐以及新的生物质的塑料。也就是通常所说的生物降解塑料。
Under natural conditions such as soil and / or sandy soil, and / or under specific conditions such as composting or anaerobic digestion, or in water-based culture medium, microorganisms such as bacteria, molds and seaweeds in nature cause degradation, and finally completely degrade into carbon dioxide (CO2) or / and methane (CH4), water (H2O) and mineralized inorganic salts of its elements, as well as new ones The plastic of biomass. It is also known as biodegradable plastics.
生物降解塑料分类:按照原料组成和制造工艺不同可分为以下三种:天然高分子及其改性材料、微生物合成高分子材料和化学合成高分子材料。目前常用的生物降解塑料有:聚3-羟基烷酸酯(PHA)、聚乳酸(PLA)、聚ε-己内酯(PCL)和聚丁二酸丁二醇酯(PBS)。
Classification of Biodegradable Plastics: according to the different composition of raw materials and manufacturing process, they can be divided into the following three kinds: natural polymer and its modified materials, microbial synthetic polymer materials and chemical synthetic polymer materials. At present, the commonly used biodegradable plastics are: poly (3-hydroxyalkanoate) (PHA), poly (lactic acid) (PLA), poly (ε - caprolactone) (PCL) and poly (butylene succinate) (PBS).
聚3-羟基烷酸酯(PHA)
Poly (3-hydroxyalkanoate) (PHA)
聚羟基脂肪酸酯是由微生物通过各种碳源发酵而合成的不同结构的脂肪族共聚聚酯。其中更常见的有聚3-羟基丁酸酯(PHB)、聚羟基戊酸酯(PHV)及PHB和PHV的共聚物(PHBV)。PHB是一种在自然界中广泛存在的热塑性聚酯,尤其常在细菌细胞间发现。PHB的许多物理性能和机械性能与聚丙烯塑料接近,但它具有生物降解性和生物相容性,在生物体内可完全降解成β-羟基丁酸、二氧化碳和水。用这种生物塑料制成的材料可用于药物释放系统、植入体及一些痊愈后在人体中无害分解的器件,但相对聚丙烯来说,PHB比较硬,且更脆一些。
Polyhydroxy fatty acid ester is a kind of aliphatic copolyester with different structure, which is synthesized by microorganisms through various carbon sources fermentation. The most common ones are PHB, PHV, PHB and PHBV. PHB is a kind of thermoplastic polyester widely existing in nature, especially in bacterial cells. PHB has many physical and mechanical properties similar to polypropylene, but it has biodegradability and biocompatibility. It can be completely degraded into β - hydroxybutyric acid, carbon dioxide and water in vivo. The material made of this kind of bioplastics can be used in drug release system, implants and some devices that can decompose harmlessly in human body after recovery. However, compared with polypropylene, PHB is harder and more brittle.
通过PHB与PHV共聚(PHBV)可以改善PHB结晶度高、较脆的弱点,提高其机械性、耐热性和耐水性。PHB/PHV共聚物已经有产品出售,商品名为Biopol。Biopol是由一系列不同材料组成的,当其中PHV的含量不超过30%, PHB/PHV为89/11时共聚物的强度和韧性达到,此类产品可用于食品包装、化妆品、医药、卫生及农业等行业。
Through PHB and PHV copolymerization (PHBV), the weakness of PHB with high crystallinity and brittleness can be improved, and its mechanical property, heat resistance and water resistance can be improved. PHB / PHV copolymers have been sold under the trade name biopol. Biopol is composed of a series of different materials. When the content of PHV is no more than 30% and PHB / PHV is 89 / 11, the strength and toughness of the copolymer is the best. Such products can be used in food packaging, cosmetics, medicine, health and agriculture industries.
聚乳酸生产是以乳酸为原料。传统的乳酸发酵大多用淀粉质原料。目前美、法、日等国家已开发利用玉米、甘蔗、甜菜、土豆等农副产品为原料发酵生产乳酸,进而生产聚乳酸。玉米是生物降解塑料聚乳酸的原料。制造生物降解塑料聚乳酸的工艺过程如下:首先把玉米磨成粉,分离出淀粉,再从淀粉中提取出原始的葡萄糖,用类似啤酒的发酵工艺将葡萄糖转化成乳酸,再把提取出来的乳酸制成更终的聚合物—聚乳酸。
Polylactic acid is produced from lactic acid. The traditional lactic acid fermentation mostly uses starch material. At present, the United States, France, Japan and other countries have developed the use of corn, sugarcane, sugar beet, potatoes and other agricultural and sideline products as raw materials to produce lactic acid, and then produce polylactic acid. Corn is the preferred raw material of biodegradable plastic polylactic acid. The technological process of manufacturing biodegradable plastic polylactic acid is as follows: firstly, corn is ground into powder, starch is separated, and original glucose is extracted from starch. Finally, glucose is transformed into lactic acid by fermentation process similar to beer, and then the extracted lactic acid is made into final polymer polylactic acid.
有了生物降解颗粒上面的小总结,希望对广大客户有所帮助,如果有什么不理解的或者寻求帮助的请点击我们的网站:http://www.rsoau.com或者来电咨询,我们会尽全力为您解决
With the small summary of biodegradable particles, we hope to help our customers. If you don't understand or ask for help, please click our website: http://www.rsoau.com Or call for consultation, we will do our best to solve it for you

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