| 查看: 258 | 回复: 0 | |||
[求助]
求文献，Strength characterisation of microbial granules
|
|
Strength characterisation of microbial granules 作者 JHF Pereboom 摘要 The strength of microbial granules is still poorly understood. The granule strength is defined as the resistance to attrition and/or breaking by a mechanical force or the liquid shear stress. The strength of various types of microbial granules were studied. The objective was to develop an in vitro strength characterisation test and to be able to predict granule behaviour in full scale systems. Abrasion experiments were conducted in stirred tanks and bubble columns, while the influence of viscosity and medium composition, shear rate and particle size were studied. The medium viscosity did not influence the relation between shear rate and abrasion. Measurements in demineralized water or media containing complexing agents resulted in lower granule strengths presumably the result of the removal of calcium from the granule matrix. In bubble columns attrition is the predominant abrasion process. In full scale reactors, e.g. UASB, attrition is apparently insignificant. In stirred tanks also granule breakage was observed. The abrasion rate is not directly related to the stirrer tip speed. Larger methanogenic granules showed more abrasion compared to small ones. In contrast larger nitrifying granules were stronger than small ones. A standardized strength characterization test was developed to be able to compare strengths of different microbial granules. The strength of slow growing systems appeared to be higher as compared to fast growing systems. From an ecological point of view, cells growing slowly in continuous operated systems gain advantage from attachment and shear resistance or strength. 出版源《Water Science & Technology》, 1997, 36(s 6–7):141–148 关键词 UASB-reactor / abrasion / biofilm / granule strength / microbial granules / nitrification |
回复此楼» 猜你喜欢
EST论文投稿后怎么把双通讯作者中的一个作者改为独立通讯作者？
已经有5人回复
-
聚氨酯涂层材料
已经有2人回复
-
建筑环境与结构工程论文润色/翻译怎么收费?
已经有146人回复
-
浙江理工大学余德游课题组招收常年博士后、博士生和科研助理
已经有0人回复
-
焦性没食子酸生产工艺
已经有3人回复
-
某地区污染地块工程项目案例公示
已经有0人回复
-
求助高质量论文
已经有5人回复
-
中科院生态中心博士后公寓环境条件
已经有0人回复
-
求反渗透ROSA软件
已经有5人回复
-
27博士申请
已经有2人回复
-
再次求反渗透ROSA软件
已经有0人回复
40
