摘要
针对悬浮泥沙与长江原水CODMn的关系开展试验研究,发现悬沙对CODMn衰减存在明显的促进作用,随着水温和悬沙浓度的上升,原水CODMn衰减速率系数增加;原水中悬沙颗粒粒径分布直接影响CODMn衰减过程,细颗粒含量越高,CODMn衰减速率系数越大。现场研究显示,沉淀作用和悬沙表面的生物降解作用是陈行水库原水COD改善的主要原因。
Libratory and field studies were conducted to disclose to the relationship between suspended sediment and CODMn. The results suggested that suspended sediment could promote the decay of CODMn. The decay coefficient of CODMn increased when the water temperature and suspended sediment concentration increased. The particle size distribution in raw water directly influenced the decay of CODMn, and the fine particle had a positive effect on the decay coefficient of CODMn. Field studies suggested that sedimentation and biodegradation were main factors for the improvement of CODMn in raw water retained in Chenhang reservoir.
出处
《给水排水》
CSCD
北大核心
2009年第5期172-175,共4页
Water & Wastewater Engineering
基金
国家重点基础研究发展计划(973)项目(2002CB412409)
关键词
悬浮泥沙
原水
CODMN
衰减速率系数
浊度
Suspended sediment
Raw water
CODMn
Decay rate coefficient
Turbidity
