Conditions and Mechanisms Affecting Nutrient Removal in a Carrousel Oxidation Ditch with low Dissolved Oxygen Concentration

CORC > 兰州理工大学 > 兰州理工大学 > 土木工程学院

	Conditions and Mechanisms Affecting Nutrient Removal in a Carrousel Oxidation Ditch with low Dissolved Oxygen Concentration
	Yang, Yahong; Wang, Yajun; Wang, Ying
	2012
关键词	Fine bubble aeration Domestic wastewater SND Nitrogen Phosphorus
卷号	7
页码	92-97
英文摘要	The approach for Nutrient removal called SND (in time and in space with constant conditions) was applied in OD(Oxidation ditch)which is a situation where SND often has a significant impact. Usually in the OD, the spatial anoxic zones along the ditch are created by adjusting the aeration at different points; and as high internal recycle flow subjects mixed liquor to alternating aerobic and anoxic conditions, there exist obvious advantages in performing SND in the ditch. Carrousel Oxidation Ditch with low dissolved oxygen was used to deal with domestic wastewater in the A Plant. The stable system demonstrated that the data revealed that removal rates of COD, NH4-N, TN, and TP were 87%, 86%, 80% and 60%, respectively. Although hydraulic retention time (HRT) was only 5-6 hours less than that of design (15 hours), the removal of nitrogen because of SND and phosphorus met the second-class standard GB18918-2002 of China. As well as the analyses demonstrated that there was a good phenomena of SND in the oxidation ditch (OD) because of low DO and then got a good removal phosphorus for low nitrate concentration in RAS. However, the increasing of nitrogen and phosphorus from oxidation ditch end to secondary sedimentation effluent were negative to removal nitrogen and phosphorus.
会议录	2012 INTERNATIONAL CONFERENCE ON ECOLOGY, WASTE RECYCLING, AND ENVIRONMENT (ICEWE 2012)
会议录出版者	INFORMATION ENGINEERING RESEARCH INST, USA
会议录出版地	100 CONTINENTAL DR, NEWARK, DE 19713 USA
语种	英语
资助项目	Gansu Natural Science Foundation[1010RJZA048] ; Gansu Construction Project[JK2010-67]
WOS研究方向	Engineering
WOS记录号	WOS:000393850200018
内容类型	会议论文
源URL	[http://119.78.100.223/handle/2XXMBERH/37148]
专题	土木工程学院
通讯作者	Yang, Yahong
作者单位	Lanzhou Univ Technol, Sch Civil Engn, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Yang, Yahong,Wang, Yajun,Wang, Ying. Conditions and Mechanisms Affecting Nutrient Removal in a Carrousel Oxidation Ditch with low Dissolved Oxygen Concentration[C]. 见:.