YANGHao-ran,WUWei,PANRui-jing,et al.Treatment Technology for Hard -Bottom North Lake in Wuhan[J].China Water & Wastewater,2024,40(23):114-122.
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Treatment Technology for Hard -Bottom North Lake in Wuhan

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第40卷 Number: 第23期 Page: 114-122 Column: Date of publication: 2024-12-01
Author(s):
YANG　Hao-ran1; 2;  WU　Wei3;  PAN　Rui-jing4;  DONG　Xian-zhou1;  JIANG　Yi-feng1;  YU　Jian-yang4;  WANG　Zong-ping1
（1. School of Environmental Science & Engineering， Huazhong University of Science & Technology， Wuhan 430074， China； 2. Jinniu District Commission Office， Chengdu 610000， China； 3. Wuhan Municipal Engineering Design & Research Institute Co. Ltd.， Wuhan 430070， China； 4. Lake Management Office of Wuhan Jianghan District， Wuhan 430070， China）
Keywords:
landscape water;  hard-bottom water environment management;  water quality improvement; governance plan
Abstract:
As urbanization continues to advance, the water quality of hard bottom landscape lakes has garnered increasing attention. The North Lake in Wuhan exemplifies a hard bottom landscape lake that is experiencing significant algal blooms, deteriorating aquatic ecology, and reduced water transparency. Based on this, a comprehensive approach involving the removal of hard bottom, enhancement of aquatic ecology, and implementation of water circulation measures was employed to conduct a pilot test for the remediation of the water body in North Lake. In the three experimental areas, the synergistic effects of hard bottom removal, water circulation enhancement, and ecological remediation yielded optimal results. When compared to untreated lake water, reductions in total nitrogen, total phosphorus, turbidity, and algal density were observed at percentages of 19.6%, 30.0%, 26.5%, and 68.7%, respectively. The underlying cause was attributed to the synergistic effects of microorganisms, plant uptake, and cyclic filtration. During periods of algal blooms, the water quality could still meet the class Ⅳ surface water standard. The removal of hard bottom resulted in a reduction of organic matter, total phosphorus, and total nitrogen in the substrate. The dominant bacterial phyla identified in the experimental areas were Proteobacteria and Chloroflexi, exhibiting maximum relative abundances of 60.86% and 71.33%, respectively. Concurrently, there was an increase in microbial α-diversity within the experimental areas, which contributed positively to the stability and ecological integrity of the lake bottom.The cost ranged from 0.13 yuan/m3 to 0.14 yuan/m3, demonstrating a high level of economic efficiency and serving as a valuable reference for potential application and promotion in other hard bottom landscape lakes.
Last Update: 2024-12-01