城市景观水体曝气与生物膜联合净化技术研究

为提高城市景观水体的透明度,降低水体中的营养盐含量,改善水生态系统恢复的生境条件,将水体曝气与生物膜复合净化技术应用于北京某疗养院5 000 m2景观水体,研究该技术提高水体透明度和降低水体中营养盐的效果,曝气方式采用新型的推流型射流曝气机,生物膜载体采用弹性生物膜填料.研究显示,该技术能使水体透明度从25 cm提高到了120 cm;水体中总氮(TN)、氨氮(NH4 -N)、硝氮(NO3--N)、总磷(TP)的含量分别降低了22.4%、86.6%、90%和73.3%;水体底部溶解氧(DO)含量由4.3 mg/L增加到7 mg/L左右.环境水体透明度的提高为恢复水生态系统创造了有利条件,表明水体曝气与生物膜复合净化技术是景观水体水生态系统生境改善的有效措施.

Research of Aeration with Bio-film Technology to Treat Urban Landscape Water

Research of the Aeration with Bio-film Technology was carried out to the treat scenic water of a sanatorium in Beijing. The aim of the research was improving the water habitat by increasing the transparency and reducing the concentration of N and P. The equipments were setted in a 5000m2 water area, which combined the plugflow jet areator with the Elastic Biological filler. The research indicated that the transparency was increased from 25cm to 120cm by the technology. The removal efficiencies of TP, NH4+-N and NO3-N were 86.6%, 90% and 73.3%, but there was only 22.4% for TN removal efficiency. The concentration of DO was increased from 4.3mg/L to 7mg/L. In a word, the Aeration with Bio-film Technology was an effective measure to improve the water habitat by increasing the transparency.