北京水务Issue(3)：20-27,8.DOI:10.19671/j.1673-4637.2024.03.005
活性与非活性污泥系统中蓝铁石结晶的特性及差异
Characteristics and differences of vivianite in activated and non-activated sludge system
吴洪宇 1郝燕 1丁悦 1赵钰 1杨子涵1
作者信息
摘要
Abstract
In order to achieve better separation and recovery of vivianite from sludge,it is necessary to further study the growth Characteristics of vivianite crystals in sludge and the in fluence of activated sludge on crystal growth,an anaerobic reaction device was designed based on the phosphorus recovery technology of vivianite crystallization.Simulated domestic sewage and iron source were added to both the activated sludge system and the non-activated sludge system.The crystal growth characteristics and dif-ferences of vivianite were compared after the reactor operated for an extended period.The results showed that the anaerobic sludge could enhance the crystal growth of vivianite.The final morphology of vivianite crystals in both the activated sludge system and the non-sludge system was a flower-like aggregate,how-ever,the crystals in the activated sludge system were more dense and fuller.When the saturation index(SI)value was about 6,the crystals tended to nucleate.As the SI value dropped to around 3,the crystals began to grow rapidly.In the non-sludge system,the initial stage took more time to reach the SI value for nucleation.There were 1-2 mm vivianite crystals in the sediment at the bottom of the experimental de-vice.These vivianite crystals could be recovered by periodic gravity separation.关键词
蓝铁石结晶/活性污泥/污水磷回收/晶体生长Key words
vivianite/activated sludge/phosphorus recovery/crystal growth分类
建筑与水利引用本文复制引用
吴洪宇,郝燕,丁悦,赵钰,杨子涵..活性与非活性污泥系统中蓝铁石结晶的特性及差异[J].北京水务,2024,(3):20-27,8.
