摘要
利用中试规模的人工湿地对污泥进行生态稳定化处理。第一年污泥生态稳定化系统表面形成了稳定的污泥层,第二年运行中期考察由污泥层和填料层构成的"二元结构"对污泥渗滤液的处理性能。对进泥(0 cm)、泥沙界面(50 cm)、植物根系层(70 cm)、填料中间层(90 cm)和出水层(110 cm)进行取样,试验结果表明渗滤液经过污泥层后,化学需氧量(COD)和硝态氮(NOx--N)表现为升高,氨氮(NH4+-N)和总磷(TP)表现为快速降低;在填料层,各污染物浓度呈下降趋势。不同取样点污泥渗滤液COD和氮素的空间变化表明,芦苇区的除污能力略好于香蒲区。
A pilot scale sewage sludge ecological stabilization experiment was conducted for sludge dewatering. Reeds （ Phragmites australi ） and cattails （ Typha augustifolia ） were chosen as experiment plants. A layer of dried sludge formed on the surface of the bed in the first year. The experiment was conducted to investigate the performance of sludge layer and matrix layer dual-layer structure for percolate treatment in the second year. The sample ports set at inlet （0 cm depth）, the interface of sludge and sand （50 cm depth）, root layer （70 cm depth）, middle matrix layer （90 cm depth） and effluent layer （110 cm depth）. The results showed that percolate COD and NOx- - N concentrations increased, and NI4＋ - N and TP concentrations decreased quickly after percolate flow through sludge layer. In the matrix layer, the pollutant concentrations showed a trend of decrease. The spatial variation of percolate COD and nitrogen concentrations at different ports demonstrated that the capacity of pollutant removals in reed region was better than that in cattail region.
出处
《吉林农业大学学报》
CAS
CSCD
北大核心
2011年第3期306-309,323,共5页
Journal of Jilin Agricultural University
基金
国家自然科学基金项目(50978048)
关键词
芦苇床
生态稳定
污泥处理与处置
渗滤液处理
reed bed
ecological stabilization
sewage sludge treatment and disposal
percolate treatment
