摘要
为了研究添加生物膜对表流湿地水体系统净水能力、湿地植物及藻类群落的影响,设置6个不同生物膜载体密度的表面流芦苇人工湿地,比较其对主要污染物的去除效率及水体中DO、浊度的变化。调查对表流湿地中芦苇、着生藻类、浮游藻类的影响,并运用SPSS软件进行统计分析。结果表明,添加生物膜显著提高了表流湿地对污染物的净化能力,对COD（Cr）、TN、TP、氨氮的去除率分别提高了4.7%～12.8%、3.2%～11.9%、-1.3%～7.6%、5.9%～11.7%,生物膜添加量与污染物去除率间有明显正相关关系。添加生物膜对水体中DO、浊度影响较大,当载体密度较高（≥3.3棵/m2）时,水体DO、浊度明显改善,生物膜添加量与浊度存在明显的线性负相关关系。研究发现添加生物膜对芦苇的生长状况、着生藻类密度和结构均没有显著影响,而水体中添加生物膜促进了浮游藻类的光合作用。
To study the effect to water purification ability,wetland plants and algae groups of surface-flow reed wetland by adding biofilm,six different density of biofilm carriers were selected to construct six surface-flow reed wetlands. Their removal rates of major pollutants and the change of DO and turbidity were compared,the effects to reed,periphytic algae and floating algae of wetlands were also investigated. The data generated by this experiment was analysed by a software called SPSS. The results showed that adding biofilm significantly improved the purification capacity of surface-flow wetland. The removal rates of COD（Cr）,TN,TP and ammonia nitrogen were increased by4. 7% ～ 12. 8%,3. 2% ～ 11. 9%,- 1. 3% ～ 7. 6%,5. 9% ～ 11. 7%,respectively. The removal rates of pollutants were positively correlated to the quantity of biofilm. Also,DO and turbidity of water were obviously affected by biofilm. Significant improvement of DO and turbidity was seen when the density of carriers was high（ ≥3. 3 per square meter） and the turbidity had an obviously linear negative correlation with the quantity of biofilm. In addition,adding biofilm had no significant effect on the growth of reed,density and structure of periphytic algae but may promote the photosynthesis of floating algae.
出处
《科学技术与工程》
北大核心
2016年第12期157-162,共6页
Science Technology and Engineering
基金
国家自然科学基金(51278165)资助
关键词
生物膜
表面流湿地
水体系统
净水能力
影响
biofilm
surface-flow wetland
water system
purification capacity
effect
作者简介
汤苏晨（1990-），男，江苏苏州人，硕士研究生。研究方向：水资源保护与生态修复。E-mail：sztscsmile@163．com。
