Eutrophication Control and Environmental Restoration Using Reverse Osmosis Process in the Shichahai Lakes System
The Shichahai Project is an activity, supported by the Italian Ministry for Environment and Territory and the Beijing Environmental Protection Bureau under the Sino-Italian Cooperation Program, aimed to enhance the water quality of the Shichahai lakes system in Beijings urban area. In a first phase, the pollution problems were investigated and the most appropriate measures to restore water quality in view of the 2008 Olympic Games were identified. Mainly, the lakes suffer from a diffuse eutrophic state that cannot be handled with the traditional approach of controlling the external nutrient loads. Consequently to control eutrophication, the solution to reduce the internal loads by continuous treatment of waters taken from the lakes with a pump and treat technique was selected. But, even in strong eutrophication status, the nutrients concentrations in surface waters are significantly lower than in wastewaters. Therefore two parallel goals are to be pursued: ① selecting a purification technique able to treat low concentration waters with high removal efficiency; ② identifying the optimal caption points so as to withdraw waters with the maximum available nutrients concentrations. These objectives will be pursued by compact chemical assisted RO plants, and a detailed survey based on on-field continue monitoring and numerical models, aimed to select the optimal withdrawal location, timing and conditions, and to estimate the required restoration time.
eutrophication phosphorus removal lake recovery reverse osmosis (RO)
Renato Iannelli Augusto Pretner Nicolo Moschini Francesco Dotto
University of Pisa-Dept. of Civil Engineering SGI Studio Galli Ingegneria SpA-Padova Italy DFS Engineering, Beijing, China
国际会议
山东东营
英文
43-51
2007-10-16（万方平台首次上网日期，不代表论文的发表时间）