摘要
为了解某市饮用水处理流程中的藻类状况,对某市饮用水源及自来水厂各主要处理过程中的水样进行藻类检测鉴定。在各水样中共检测到藻类72种,蓝藻、绿藻和硅藻为优势藻群,并检出微囊藻、颤藻和鱼腥藻等潜在产毒的种类,其中微囊藻在源水中的细胞密度为1.9×106cell·L-1。源水中藻类细胞密度为2.8×106cell·L-1,处理后自来水中藻类的细胞密度为4.6×104cell·L-1,藻类总去除率为98.3%,其中滤池对藻类的去除率为82.7%,但其对蓝藻的去除率仅为11.8%。研究结果表明,该市水源可能已受到藻毒素的污染;现有自来水处理工艺中的滤池难以对个体较小的有毒蓝藻有效去除。针对该地区水源藻类的分布情况提出了优化过滤工艺的建议。
In order to investigate the status of algae pollution of municipal water, samples from the source water and the main treatment processes of drinking water in a city were examined. 72 species were identified in various samples. Cyanophyta, Chlorophyta and Bacillariophyta were the dominant groups. Species that have the potential to produce toxins including those in genus Microcystis, Oscillatoria and Anabaena were examined. The cell density of Microcystis was 1.9×106 cell·L-1 in the source water, after treatment, algal density was 2.8×106 cell·L-1 in the source water and 4.8×104 cell·L-1 in the tap respectively. The total algae removal rate was 98.3%, and removal rate by the filter was 82.7%, but the Cyanobacteria removal rate by the filter was only 11.8%. The results also showed that the water source was contaminated with algal toxins. It is difficult to effectively remove the toxic Cyanobacteria with the existing filter. A suggestion to optimize the filtering technology, is suggestted based on the distribution of the local algae.
出处
《生态科学》
CSCD
2005年第2期120-123,149,共5页
Ecological Science
基金
国家自然科学基金(30370231)
关键词
饮用水
藻类
分布
去除率
Drinking water
Algae
Distribution
Removal rates
