基于生态修复的河湖环保清淤关键问题研究

Key Issues of Environmental Dredging of River and Lake Sediments Based on Ecological Restoration

在当前水环境综合治理中,底泥清淤疏浚是清除湖泊和河道内源污染、减少污染物释放的重要措施之一。该文基于环保清淤的基本概念,分析了环保清淤与传统工程疏浚的区别,并介绍了环保清淤在中国的发展现状和存在的问题。从底泥调研与分析评估、清淤深度控制、清淤方式及清淤设备选择、底泥脱水与固化、尾水处理与排放标准控制和底泥资源化方式等方面对环保清淤的关键问题进行了深入讨论分析。研究结果可为城市湖泊水质修复和黑臭水体治理工程环保清淤方案的比选设计提供一定借鉴和参考。

Sediment dredging is one of the important methods to eliminate endogenous pollution and reduce pollutant release from lake and river sediments in the current comprehensive water environment management project.In this study,the basic concept of environmental dredging was introduced and the difference between environmental dredging and engineering dredging was analyzed.The present situation,development characteristics and existing problems of environmental dredging in China was introduced.Then,several key issues of environmental dredging,such as,sediment investigation and evaluation,dredging depth control,the selection of dredging method and dredging equipment,sediment dewatering and solidification,tail water treatment and discharge standard,and the reutillzation treatment and disposal of dredged sediments was comphensively discussed and analyzed.The research results will provide some reference for the design of the environmental dredging program for lake water quality restoration and black odorous water treatment project.