River regulation should be carried out based on the technical route of "Source control & pollution interception and internal source management; flowing water cycling and clean water supply; water purification and ecological remediation. Among of them, source control & pollution interception is the top priority in river improvement.
Comprehensive solution based on pollution interception in soft-enclosure river channels. The technique of pollution interception in soft-enclosure river channels separates the point-source and surface-source pollution discharge along rivers from the water of main river channels, and thus ensures that the water of main river channels will basically not be affected by external source pollution. The sewage in the soft enclosure is then treated with corresponding specific enhanced treatment measures such as in-situ reactor or ex-situ enhanced measures (magnetic separation, air floatation, MBR and other techniques) according to the characteristics of water quality and water quantity. On the whole, the ecological remediation technology based on the in-situ reactor is selected to improve the overall water quality and enhance the self-cleaning capacity of river channels.
The soft enclosure consists of three parts, namely floating body, separation film and positioning block. The separation film is made of polymeric organic material which is anti-freezing, anti-oxidation and corrosion-resistant. It is fixed with anchor at the bottom, and adopts floating ball as the floating body at the upper part. The soft enclosure may stretch out and draw back freely according to the change of river water level, so as to ensure the relative independence of polluted area and river water area.
Comprehensive solution adopting ex-situ enhanced treatment + in-situ reactor.
Enhancement of self-cleaning capacity of river channels by focusing on ecological remediation.