Disclosed a device for preventing and controlling pollutants in the reuse of reclaimed water in agricultural activity areas with extreme water shortage, including A.sup.2/O tank (1), nano-aeration tank (2) and quick soil infiltration device (3) connected in sequence. A.sup.2/O tank (1) 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 (2). The supernatant treated by nano-aeration tank (2) is transported into quick soil infiltration device (3), and is allowed to flow through one or more layers of fillers laid in quick soil infiltration device (3) to degrade or remove pollutants.

A method for operating a water treatment plant, wherein the plant is equipped with an apparatus for injecting a gas containing oxygen into an effluent, the method comprising a phase of detecting anomalies in the operation of the apparatus, wherein the phase of detecting anomalies comprises an implementation of the following steps: providing data representative of the operating state of the apparatus; and providing a system for acquiring and processing said data.

A method for operating a water treatment plant, wherein the plant is equipped with an apparatus for injecting a gas containing oxygen into an effluent, the method comprising a phase of detecting anomalies in the operation of the apparatus, wherein the phase of detecting anomalies comprises an implementation of the following steps: providing data representative of the operating state of the apparatus; and providing a system for acquiring and processing said data.

Disclosed are a method and system for vertically utilizing unconventional water source. The system includes a water collection unit, a water treatment unit, and a monitoring, regulation and reuse unit. The water collection unit is configured to collect rainwater and/or domestic wastewater; the water treatment unit is in communication with the water collection unit and configured to purify the rainwater and/or the domestic wastewater collected by the water collection unit; and the monitoring, regulation and reuse unit is in communication with the water treatment unit and configured to use reclaimed water obtained through treatment by the water treatment unit. The method and the system for vertically utilizing unconventional water source in the present disclosure have advantages of a simple structure, low costs, and high treatment efficiency, effectively save energy and water resources, and are suitable for decentralized treatment and recycling of urban domestic wastewater.

Increased control and efficiency over the wastewater purification can be achieved through creating conditions that allow the operator to selectively prioritize the digestive function of microorganism in the activated sludge. The gas-dispersion return sludge is created using pure oxygen or oxygen containing trace amounts of ozone as a reactive gas, which is blended with return sludge to create a mixture of gas and liquid, which is passed through an atomizer or a cavitation pump to instantly render the reactive gas to an ultra-fine bubble state. At least a portion of the ultra-fine bubbles dissolve within the gas-dispersion return sludge, activating the dormant microorganisms. Due to a complete or an almost complete absence of biodegradable material in the gas-dispersion return sludge, the microorganism prioritize their digestive function, and when exposed to biodegradable pollutants present in wastewater, digest the pollutants using biochemical pathways different from the ones used in nature.

Increased control and efficiency over the wastewater purification can be achieved through creating conditions that allow the operator to selectively prioritize the digestive function of microorganism in the activated sludge. The gas-dispersion return sludge is created using pure oxygen or oxygen containing trace amounts of ozone as a reactive gas, which is blended with return sludge to create a mixture of gas and liquid, which is passed through an atomizer or a cavitation pump to instantly render the reactive gas to an ultra-fine bubble state. At least a portion of the ultra-fine bubbles dissolve within the gas-dispersion return sludge, activating the dormant microorganisms. Due to a complete or an almost complete absence of biodegradable material in the gas-dispersion return sludge, the microorganism prioritize their digestive function, and when exposed to biodegradable pollutants present in wastewater, digest the pollutants using biochemical pathways different from the ones used in nature.

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 (1), a nano-aeration tank (2) and a vertical subsurface flow constructed wetland (3) connected in sequence, salvaging duckweed and algae in the basin, then crushing, acidizing and digesting them in the hydrolysis tank (1), importing the supernatant obtained in the hydrolysis tank (1) into the nano-aeration tank (2), then mixing the water from the nano-aeration tank (2) with basin water and importing them into the vertical subsurface flow constructed wetland (3), treating to obtain basin water meeting the irrigation requirements.

Systems and methods are provided for nitrogen gas sparging assisted biological treatment of water. In one example, a denitrification system may include a media-packed column or bed through which nitrogen gas is sparged to remove dissolved oxygen from water. In some examples, an external carbon source and electron donor may be added to the media-packed column or bed to facilitate biological removal of the nitrate and/or other contaminants from the water. In this way, by relying on the sparged nitrogen gas to remove the dissolved oxygen, less of the external carbon source and electron donor may be employed as compared to denitrification systems not assisted by nitrogen gas sparging.

Systems and methods are provided for nitrogen gas sparging assisted biological treatment of water. In one example, a denitrification system may include a media-packed column or bed through which nitrogen gas is sparged to remove dissolved oxygen from water. In some examples, an external carbon source and electron donor may be added to the media-packed column or bed to facilitate biological removal of the nitrate and/or other contaminants from the water. In this way, by relying on the sparged nitrogen gas to remove the dissolved oxygen, less of the external carbon source and electron donor may be employed as compared to denitrification systems not assisted by nitrogen gas sparging.

Increased control and efficiency over the wastewater purification can be achieved through creating conditions that allow the operator to selectively prioritize the digestive function of microorganism in the activated sludge. The gas-dispersion return sludge is created using pure oxygen or oxygen containing trace amounts of ozone as a reactive gas, which is blended with return sludge to create a mixture of gas and liquid, which is passed through an atomizer or a cavitation pump to instantly render the reactive gas to an ultra-fine bubble state. At least a portion of the ultra-fine bubbles dissolve within the gas-dispersion return sludge, activating the dormant microorganisms. Due to a complete or an almost complete absence of biodegradable material in the gas-dispersion return sludge, the microorganism prioritize their digestive function, and when exposed to biodegradable pollutants present in wastewater, digest the pollutants using biochemical pathways different from the ones used in nature.