How to clean up river silt?

1. Yard treatment and on-site treatment: Yard treatment means that sludge is dredged and transported to the designated sludge yard for treatment. In-situ treatment method does not dredge the sediment, but directly covers the sediment under water or drains the overlying water body for dehydration, solidification or physical leaching treatment.

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2. Resource utilization and conventional disposal: Sludge is essentially engineering waste. According to the principles of reduction, harmlessness and recycling of solid waste treatment, sludge should be considered as much as possible.

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3. Passivation treatment technology of polluted sludge: Passivation treatment is to add corresponding chemicals according to the different active states of heavy metals in sludge in different environments, so as to convert unstable heavy metals in sludge into stable heavy metals, thereby reducing the activity of heavy metals and achieving the purpose of reducing pollution.

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4. Sludge disposal technology in the yard: a sludge yard is usually set up for dredging projects. Sludge yard disposal technology is to use a series of treatment measures to quickly promote settlement and rapid consolidation from the initial reclamation stage, and combine surface treatment technology to recycle or realize rapid repair of sludge yard.

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5. Sludge resource utilization technology: Sludge resource utilization technology also includes heat treatment method of making sludge into bricks. Heat treatment method is to convert sludge into building materials by heating and sintering, which can be divided into sintering method and melting method according to different principles.