摘要
从2009年4月—2009年9月,利用信阳市郊区的一个农村污水塘(面积:2 500m2;深:1.5 m)的水体进行无根萍生物水质净化研究.实验开始在水体中加入无根萍的数目为4×106个.m-2(干质量:8.9g.m-2).在150 d内,pH值降低了2.4,水体中的总磷含量下降了84.3%,总氮含量下降了46.1%,BOD含量下降了76.9%,COD含量下降了69.1%.无根萍的数目增加了7.3×107个.m-2(干质量:163 g.m-2).无根萍对污水理化性质有明显的改善作用.
From April to September in 2009, the water purification in wastewater pond （2 500 m2 area, 1.5 m depth） at Xinyang countryside was studied by use of Wolffarrhiza as treating agent. The amount of Volffia arrhiza used at beginning stage is 4×106个· m-2 （8.9 g · m-2 dry weigh）. It was found that the declined values of pH,TP, TN, BOD5 and COD in the wastwater pond are 2.4,84.3% ,46.1% ,76.9% and 69.1% after 150 days treatment, respectively. The results showed that the water quality of wastewater pond can be improved significantly by Wolffta arrhiza.
出处
《信阳师范学院学报（自然科学版）》
CAS
2011年第4期473-475,498,共4页
Journal of Xinyang Normal University(Natural Science Edition)
基金
国家自然科学基金项目(30470276)
河南省科技攻关项目(092102310100)
关键词
无根萍
水质净化
污水塘
生物量
Wolffia arrhiza
water quality
wastewater pond
biomass
