Overview of bio nanofabric from bacterial cellulose

Nanofibers and bio-nonwoven fabrics of pure cellulose can be made from some bacteria such as Acetobacter xylinum. Bacterial cellulose fibers are very pure, 10?nm in diameter and about 0.5?micron long. The molecular formula of bacterial cellulose is similar to that of plant cellulose. Its fibers are very stiff and it has high tensile strength, high porosity, and nanofibrillar structure. They can potentially be produced in industrial quantities at greatly lowered cost and water content, and with triple the yield by a new process. This article presents a critical review of the available information on bacterial cellulose as a biological nonwoven fabric with special emphasis on its fermentative production and applications. Characteristics of bacterial cellulose biofabric with respect to its structure and physicochemical properties are discussed. Current and potential applications of bacterial cellulose in textile, nonwoven cloth, paper, films, synthetic fiber coating, food, pharmaceutical, and other industries are also presented.     

苏南农村地区分散式污水的处理与回用

根据国家对新农村建设的要求，农村地区水环境状况日益受到关注。针对苏南农村地区的生活污水处理现状。提出了三种可行的分散式污水处理技术即蚯蚓生态滤池处理工艺、无纺布处理工艺、人工湿地处理工艺，并对此三种工艺进行了经济性、适用性的分析。指出苏南农村地区应根据不同地形、水量、农户分布等情况，选择经济的、适用的处理工艺。