摘要
采用实验室大型光照培养箱方法,研究了生长于滨海咸水湖泊中的沉水植物川蔓藻(Ruppiamaritime)对再生水景观河道水质中营养盐(根据景观河道再生水盐度实际上下波动范围设TDS为5.67、8.19、10.65g·L-13个盐度梯度,在静水中经过川蔓藻净化10d。)的去除效果。结果表明,再生水中总磷和氨氮的去除率为94.41%￣95.32%和96.5%￣99.8%,总氮和硝酸盐氮的去除率为43.4%￣45.7%和44.08%￣46.2%;再生水中的溶解氧由6.6mg·L-1提高到10.4mg·L-1。盐度对川蔓藻吸收再生水中营养盐没有显著影响。经计算1kg鲜重的川蔓藻每天可去除252mg总氮、83.16mg总磷。川蔓藻是控制含盐量较高的景观水体富营养化的一种优选沉水植物种。
Restoration and reconstruction of healthy coastal ecological system using reclaimed wastewater has received significant attention in recent year. When reutilization of reclaimed water on scenic water, controlling the concentration nutriment in reclaimed water becomes a key factor in avoiding eutrophication. Usually a healthy submerged aquatic vegetation ecosystem should be restored or reconstructed in scenic water body, because it can remarkably improve water quality. Finding some aquatic plant species is significant for high salinity reclaimed wastewater in coastal cities of China. While studying an engineering of restoration and reconstruction in an artificial watercourse containing reclaimed municipal wastewater for landscape, we discovered Ruppia maritima was a primary colonizer in the natural re-vegetation in saline or brackish waters of ponds and canals in the coastal wetland of Tianjin, China. The plant can survive in salinities from 0 to 70 g-L-~. This investigation studied purification efficiency of Ruppia maritima to nitrogen and phosphorus in reclaimed wastewater. Under three salinity concentrations （EC=10mS·cm^-1, EC=15mS·cm^-1 EC=20 mS·cm^-1）, Ruppia maritima was cultivated for 10 days in reclaimed wastewater, the removal rates of total phosphorus （TP）, total nitrogen（TN）, nitrate nitrogen（NOs-N）, ammonia nitrogen（NHs-N） in reclaimed wastewater were found tobe 94.41%～95.32%, 43.4%～45.7%, 54.08%～36.2%, 96.5%～99.8%, respectively. The results showed that salinity affected little the removal effect of Ruppia maritima to nitrogen and phosphorus in reclaimed wastewater; the removal efficiency of TN and TP in reclaimed wastewater with Ruppia maritima were 252 mg·kg^-1·d^-1 and 83.16 mg·kg^-1·d^-1, respectively. Dissolved oxygen in reclaimed wastewater from 6.6 mg·L^-1 to 10.4 mg·L^-1. The results showed that Ruppia marltima had higher removal efficiency to nitrogen and phosphorus in reclaimed wastewater; and salinity of ranging between 10ms·cm^-1 and 20 ms·cm^-1 had l
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2005年第4期775-779,共5页
Journal of Agro-Environment Science
基金
国家863攻关课题"天津市滨海新区水环境质量改善技术与综合示范"(2003AA601030)
关键词
川蔓藻
再生水
营养盐
盐度
ruppia maritima
reclaimed wastewater
nutrient salts
salinity
