人工湿地净化城市纳污河流水开质实验研究-环境工程专业毕业论文.docx

万方数据 河北科技大学硕士学位论文 II  Abstract =2==========================。≈====；======；====：％== = == Abstract As an important ecological rehabilitating technique to treat sewage in pollution receiving rivers of Chinas urban areas，constructed wetland technology does not only improve water quality of the rivers，but beautifies the environment to form tlle beauti如l landscape．Constructed wetland acts as a huge ecological system，where there are many kinds of plants and microorganisms．It has complex ecological structure and its ecological system is easily subject to changes of temperature and water quality,etc．Thus，it is very necessary to study on the wetland technology that is designed to purify pollution receiving rivers in urban areas and optimize the parameters of the constructed wetland technologY． This paper targets at Shijiazhuang’S Xiaohe surface current constructed wetland and Hebei University of Science and Technology constructed wetland sewage treatment pilot experiments devices to study practical effect and technique characteristics of three types of constructed wetlands，which treat sewage from sewage treatment plants in urban areas and meet environmental water quality standard for surface water(GB3838．2002)Class V．Yhe microflora structure in sediments of the constructed wetlands Was also investigated．See the followings for the main contents and results： 1)Study on sewage treatment of Xiaohe surface current constructed wetland．Bv continuous monitoring water quality of upstream(inlet)，midstream and downstream(outletl in Xiaohe wetland once every month from January to December of 20 1 5，role of constructed wetland system in purifying CODcr，NHs-N，TN and TP in wastewater，as well as influence of seasonal variation in purification，Was analyzed．The results showed that under the existing water flow and inlet water quality，using the constructed wetland， major pollutants index of the effluent Can reach the surfacc water quality standard Class V，System removal rate of COD，NH3一