摘要
水葫芦是一种能有效净化污水的维管束水生植物,在不同的水体其净化效率并不相同。本文探索养鳖废水不同的pH值对水葫芦去污速率的影响。试验中废水的pH值调节在:①pH=6.5～5.5;②pH=7.5～6.5;③pH=8.5～7.5;④直接排放的养鳖废水。检测指标包括总磷(TP),总氮(TN),化学需氧量(COD),水葫芦生物量等。结果显示:pH在7.5～6.5之间水葫芦净化效率相对较高,直接排放的养鳖废水随着停留时间的增加pH值逐渐降低,在水葫芦净化过程中可适当延长废水在净化池中的停留时间,使得pH值下降至净化效率较高的区域值之后以获得较好的净化效果。
Water hyacinth is an efficient decontamination plant used for purifying waste water, and the efficiency differs in different water conditions.This study was undertaken to investigate how pH affected the nutrient absorption or cleansing rate in turtle pond wastewater. The analytical elements included TP （total phosphorus）, TN （total nitrogen）, COD （Chemical oxygen demand） and water hyacinth biomass.Result shows that the pH range of 7.5 -6.5 presents the most effective purifying result in comparison with pH range of 6.5-5.5, 8.5-7.5 and not-regulated ones, the reason is deduced due to the available state in mineral elements, which enhance the overall nutrient absorption in comparable balance supply condition. Not-regulated series showed that pH declined with the increasing retaining time of water hyacinth. So, it is option-worthy in practice to appropriately prolong decontamination time to achieve better purification result.
出处
《上海交通大学学报（农业科学版）》
2006年第2期196-199,共4页
Journal of Shanghai Jiaotong University(Agricultural Science)
基金
浙江省自然科学基金资助项目(M303436)
关键词
养殖废水
水葫芦
净化
PH
wastewate
water hyacinth
purification
pH
