Chinese Academy of Sciences

Jinsheng Wang

Lei Wang

Feng Wu

Hui Liu

Beidou Xi

Yali Zhang

Yangyang Wang

Tongtong Li

Wenbing Tan

Qian Zhang

Ming Chang

Yalei Zhang

Ruyue Yang

Disclosed a device for preventing and controlling pollutants in the reuse of reclaimed water in agricultural activity areas with extreme water shortage, including A/O tank (), nano-aeration tank () and quick soil infiltration device () connected in sequence. A/O tank () is fed with wastewater to be treated, which is treated sequentially in anaerobic, anoxic and aerobic environment, thereafter the supernatant is transported into nano-aeration tank (). The supernatant treated by nano-aeration tank () is transported into quick soil infiltration device (), and is allowed to flow through one or more layers of fillers laid in quick soil infiltration device () to degrade or remove pollutants.

Method and device for preventing and controlling pollutants in the reuse of reclaimed water in agricultural activity areas with extreme water shortage

It discloses to a device and a method for controlling pollutants in metal mine water resources cycling utilization. The device includes a multi-stage inflow constructed wetland (), in which one or more layers of the filler are laid, and water distribution pipes () are buried at different height levels in the filler layers for multi-stage inflow, so that the received basin water is allowed to flow through each layer of the filler to degrade or remove the pollutants. In the multi-stage inflow constructed wetland, the types of fillers, dosage ratio, particle size and filling height of fillers in each layer are specifically selected. Therefore, heavy metal adsorption, suspended matter filtration, organic matter degradation, dephosphorization and denitrification can be effectively realized in the multi-stage inflow constructed wetland.

Method and device for controlling pollutants in metal mine water resources cycling utilization

The present invention relates to a method and a device for controlling pollutants in basin water resources cycling utilization in agricultural activity areas. The method includes: providing an acidification tank, an aeration tank and a multi-media constructed wetland connected in sequence, which are 4&#x2dc;10 m far from basin revetment, feeding basin water into the constructed wetland, adsorbing or degrading heavy metals and organic pollutants by the constructed wetland, and then transporting the treated basin water to the agricultural activity areas. The present invention effectively controls the content of heavy metals that will enter the agricultural activity areas, fundamentally reduces the content of heavy metals in the crops, promotes the growth of the crops, maintains sustainable and healthy development of agriculture, and therefore guarantees human health and safety.

Method and device for controlling pollutants in basin water resources cycling utilization in agricultural activity areas

The present invention relates to a method and a device for preventing and controlling pollutants in basin water resources utilization. The method includes: providing a hydrolysis tank (), a nano-aeration tank () and a vertical subsurface flow constructed wetland () connected in sequence, salvaging duckweed and algae in the basin, then crushing, acidizing and digesting them in the hydrolysis tank (), importing the supernatant obtained in the hydrolysis tank () into the nano-aeration tank (), then mixing the water from the nano-aeration tank () with basin water and importing them into the vertical subsurface flow constructed wetland (), treating to obtain basin water meeting the irrigation requirements.

Method and device for preventing and controlling pollutants in basin water resource utilization

The present invention relates to a method and a device for controlling pollutants in basin water used for irrigating farmland in extremely water-scarce areas. The device includes an alternate vertical flow constructed wetland, which is constructed 4-10 m far from basin revetment. After feeding basin water into the constructed wetland, pollutants, such as heavy metals, nitrogen, phosphorus and organic matters, are adsorbed or degraded through the constructed wetland, and then the treated basin water is transported to the farmland.

Method and device for controlling pollutants in basin water used for irrigating farmland in extremely water-scarce areas

It discloses a system for controlling heavy metals and a method for preventing and controlling heavy metals using the same. The system includes a constructed wetland (), in which several layers of fillers are laid, so that water is allowed to flow through each layer of the filler to remove heavy metals. Preferably, a sandwich wall is constructed around the constructed wetland (), and organic matters () which generating heat through fermentation is filled in the sandwich wall to supply heat to the constructed wetland () in winter. The sandwich wall is easy to build and the fermentation materials are cheap and easily available, thereby the present method is able to effectively solve the difficulties occurred in the operation of constructed wetland in winter.

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Beijing, China

Jinsheng Wang