农林废弃物制备环境友好型缓释碳源生物膜载体材料  

Preparation of environment-friendly slow-release carbon source biofilm carrier material from agricultural and forestry wastes

作　　者：杨磊 郭军 王岩[1] 次仁多吉 YANG Lei;GUO Jun;WANG Yan;TSERING Dorje(School of Environment and Resources,Southwest University of Science and Technology,Mianyang 621010,Sichuan,China;Xinlong Ecological Environment Bureau of Ganzi Prefecture,Ganzi Tibetan Autonomous Prefecture 626800,Sichuan,China)

机构地区：[1]西南科技大学环境与资源学院,四川绵阳621010 [2]甘孜州新龙生态环境局,四川甘孜藏族自治州626800

出　　处：《湖北农业科学》2021年第18期68-71,共4页Hubei Agricultural Sciences

摘　　要：以农林废弃物小麦秸秆和聚乙烯制备了环境友好型缓释碳源生物膜载体材料,探究了其物理性能、挂膜性能及营养缓释性能。结果表明,载体材料平均抗拉-扭强度为4.5 MPa,成型压力、热塑时间、秸秆粒径、秸秆含量均对载体材料的比重有所影响,但载体材料比重均小于水;秸秆含量越高,孔隙率越大,秸秆含量为80%的载体材料,孔隙率达93.29%;载体材料前期有机物溶出少、速率快,中后期溶出多、速率减缓,在8 d时有机物溶出量达峰值,秸秆含量越高,载体材料浸出液有机物含量越高,在峰值时,秸秆含量为80%的载体材料有机物溶出量为79 mg/(L·g),浸出液内微生物所需元素含量丰富,无各类毒害元素,能促进微生物的生长。An environment-friendly slow-release carbon source biofilm carrier material was prepared from agricultural and forestry wastes,wheat straw and polyethylene,and its physical properties,film-hanging properties and nutritional slow-release properties were explored.The results showed that the average strength of the carrier material was 4.5 MPa,molding pressure,thermoplastic time,straw particle size,and straw content all affected the specific gravity of the carrier material,but the specific gravity of the carrier material was less than that of water;The higher the straw content was,the greater the porosity was.The carrier material with 80%straw content had a porosity of 93.29%;The dissolution rate of organic matter in the early stage of the carrier material was small and fast,and the rate of dissolution in the middle and late stages was slowed down.The amount of organic matter dissolution reaches the peak value at 8 d.The higher the straw content was,the higher the organic content of the carrier material leaching solution was.At the peak,the organic content of the carrier material with 80%straw content was 79 mg/(L·g).The leachate contains abundant elements required by microorganisms,free of all kinds of toxic elements,and could promote the growth of microorganisms.

关 键 词：生物膜载体 农林废弃物 缓释碳源 

分 类 号：X705[环境科学与工程—环境工程]