QQ客服 官方微博 反馈留言

	Flow characteristic of a pilot scale airlift oxidation ditch
	Pang Hong-tao ; Shi Han-chang ; Shi Hui-ming ; Yang Chao ; Yin Yi-ming
	2010-10-12 ; 2010-10-12
关键词	Experimental/ hydrodynamics oxidation sludge treatment wastewater treatment/ pilot scale airlift oxidation ditch air flow rate liquid velocity axial velocity activated sludge sludge sedimentation prevention wastewater treatment/ E0230 Environmental issues E2130 Fluid mechanics and aerodynamics (mechanical engineering) E1525 Industrial processes
中文摘要	The influence of air flow rate on liquid velocity and velocity distribution of a pilot scale airlift oxidation ditch were studied with clean water. The capacity of the pilot scale airlift oxidation ditch was 54 m/sup 3/. As the air flow rate varied from 42 to 170 m/sup 3//h, the horizontal velocity had a small increase and the axial velocity grew up largely. Liquid velocity had a relatively small change in the straight part with the increase of air flow rate. The average velocity in the bottom was about 0.25 m/s when the air flow rate was over 79 m/sup 3//h. In order to investigate the minimum velocity for preventing the settlement of activated sludge, the sludge concentrations under different air flow rate were measured. When air flow rate was 20 m/sup 3//h, a minimum velocity of 0.07 m/s was sufficient to prevent sludge sedimentation in the ditch. According to the result of wastewater treatment, horizontal velocity higher than 0.15 m/s in the bottom was suggested as the design criterion for a large scale airlift oxidation ditch.
语种	中文
出版者	Editorial Board of China Environmental Science ; China
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/79621]
专题	清华大学
推荐引用方式 GB/T 7714	Pang Hong-tao,Shi Han-chang,Shi Hui-ming,et al. Flow characteristic of a pilot scale airlift oxidation ditch[J],2010, 2010.
APA	Pang Hong-tao,Shi Han-chang,Shi Hui-ming,Yang Chao,&Yin Yi-ming.(2010).Flow characteristic of a pilot scale airlift oxidation ditch..
MLA	Pang Hong-tao,et al."Flow characteristic of a pilot scale airlift oxidation ditch".(2010).

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。