The quality management of sediment is mainly based on regular inspection and management and environmental investigation and assessment system. The competent authorities in charge of water body shall continuously handle the sediment inspection and declaration, and strengthen the quality control and management of sediment. The irrigation canal has the largest quantity of the monitoring locations where have the pollutant concentration higher than the upper limit value of the quality index of the bottom sediment. Irrigation canal is the most common source of pollution due to the characteristics of irrigation and drainage in early years. Because Irrigation channels are frequently cleaned regularly, sediment removed should be properly decontaminated to avoid secondary contamination. Accordingly, the EPA has conducted a technical research and analysis program on the treatment and reuse of sediment and similar substances, and conducted a feasibility study on the use of sediment as red bricks and high-value inorganic polymers. The project also develop the diversified decontamination approaches, research and analysis of relevant management system, procedures and supporting measures to accelerate decontamination of contaminated sludge of irrigation channels
In this project, we have completed the collection of relevant regulations and market researh on the reuse and treatment of sediment and similar materials. Some suggestions were also proposed.
The feasibility study of reuse of sediment for production of red brick and high value inorganic polymer is completed in this project. The result of experiment of production of red brick is feasible and can be used as reference for future.Based on the above experimental results, the relevant management and specifications and the operating parameters were proposed .
The project also assessed the integration of contaminated soil off-site management and proposes management mechanisms, procedures and legislative amendments. In addition, the project also studied the facility conditions, treatment standards and examination mechanism of sediment off-site, and puts forward the reference model of the dredging plan.The above results can be used as reference for relevant units to promote management system.
In terms of management system promotion, the project identify the high concentration of sediment in irrigation channels of Category A and explain the ways to promote the drainage of sediment in irrigation channels.