52results about How to "Enhanced reoxygenation capacity" patented technology

The invention discloses a sewage treatment system for combined tidal flow artificial wetland, belonging to the technical field of sewage treatment. The system comprises a non-powered automatic water charging device (9), an artificial wetland bed and a non-powered automatic water discharging device (2), wherein the non-powered automatic water charging device (9) is positioned above the artificial wetland bed and is communicated with the artificial wetland bed through a siphon water inlet pipe (10); the artificial wetland bed is provided with a water discharging layer (5), a denitrification reinforcing layer (7), a reinforcing reaeration layer (8) and an aerobic ecological sand layer (17) from the bottom up; and the non power automatic water discharging device (2) and the artificial wetlandbed form a connector and are connected with each other through the bottom water discharging layer (5). The invention further discloses a sewage treatment method using the system, comprising two stepsof waterflooding absorption and emptying reaeration. Compared with the traditional combined wetland, the sewage treatment system for the combined tidal flow artificial wetland increases daily sewage treatment amount and reduces construction cost.

The invention discloses a packing structure for a constructed rapid infiltration system. The packing structure is of a layered composite structure, wherein the surface layer of the layered composite structure is an intercept layer; an ecological packing layer is arranged on the lower surface of the intercept layer; geotechnical cloth is arranged between the intercept layer and the ecological packing layer; the thickness of the ecological packing layer is 5-15 times that of the intercept layer; a reoxygenation layer is arranged on the lower surface of the ecological packing layer; the geotechnical cloth is arranged between the ecological packing layer and the reoxygenation layer; a drainage layer is arranged on the lower surface of the reoxygenation layer; the geotechnical cloth is arranged on the reoxygenation layer and the drainage layer; the reoxygenation layer is formed by pavement of ceramsite; and the drainage layer is graded broken stone. The packing structure for the constructed rapid infiltration system disclosed by the invention has the advantages of high hydraulic loading, high COD removal and ammonia-nitrogen efficiency, good anti-clogging performance, low material cost and the like; and resource recycling is achieved by waste slag.

The method is install a perforated gas pipe in soil infiltration layer between water distributing pipe and water collecting pipe installed at ground with sewage, to cover high polymer hydrophobic poromeric film on outside surface of the perforated gas pipe to form a gas pipe which gas can escape but water cant, air pipe connected to ends of the gas pipe is connected with pumping fan on the earth's surface and direct interliked to air. 'Gas-liquid-gas-solid' mass transfer way is changed to 'gas-solid' by this invention to increase mass transfer efficiency and oxide effect from air to soil.

The invention relates to a wastewater treatment system for environmental engineering and particularly relates to a wind-energy superimposed-negative-pressure ventilation reoxygenation wastewater treatment system for an artificial wetland. In order to solve the technical problem of low oxygen content in the artificial wetland of the existing artificial wetland wastewater treatment system during the treatment of wastewater, the invention provides the wind-energy superimposed-negative-pressure ventilation reoxygenation wastewater treatment system for the artificial wetland. The wind-energy superimposed-negative-pressure ventilation reoxygenation wastewater treatment system for the artificial wetland is characterized in that a ventilation system drives a windmill and fan blades connected withthe windmill to rotate by using wind energies so as to form superimposed negative pressure, a diameter-reducing ventilation pipe, of which the other end is communicated with the atmosphere through anupward short pipe, is pumped to generate enhanced negative pressure, the flow and diffusion of air in a pipeline are increased, the reoxygenation of the wetland is intensified, and thus the degradation and nitrification reaction of aerobionts are promoted. The wind-energy superimposed-negative-pressure ventilation reoxygenation wastewater treatment system for the artificial wetland has the advantages of sufficient utilization of wind energy and pressure energy, intensification in reoxygenation, high denitrification efficiency, good purifying effect and the like.

The invention belongs to the technical field of domestic sewage treatment, and particularly relates to a water purification method by utilizing an artificial wetland. The method comprises the following steps: sewage to be treated is sent to a downstream first-stage wetland for treatment, a water flow treated by the first-stage wetland continues to enter an upstream second-stage wetland for treatment, a part of the treated water is sucked and flows back from the bottom of the second-stage wetland by a return pump to be mixed with sewage to be treated in a water inlet regulating tank, the otherpart continues to pass through the upstream second-stage wetland for treatment, and the treated water is discharged, wherein influent water of the downstream first-stage wetland is intermittent influent water, and the backflow is intermittent backflow; and the downstream first-stage wetland maintains continuous effluent water. The method provided by the invention realizes controllable variation ofa water level in the wetland by regulating and controlling intermittent influent water, intermittent backflow and a flow rate of the effluent water to form a periodic water level rise and fall, and can effectively improve reoxygenation efficiency of the first-stage wetland and the second-stage wetland, improve aerobic degradation ability of the artificial wetland, and improve purification efficiency.

The invention relates to a non-clogging and high-efficiency sewage treatment method with vertical downflow wetlands, which is characterized in that the sewage treatment system comprises wetland plants, a plurality of water distributing main pipes, a plurality of water distributing branch pipes, fine grain size substrates, middle grain size substrates and a plurality of catch-water pipes; the system is operated by means of continuous water feeding, time interval or variable level; wherein the water distributing main pipes and the branch pipes are positioned under the bottom surfaces of the fine grain size substrates; the branch pipes are evenly distributed in part of the wetland plants; the middle grain size substrates with the grain size between 5 mm and 10 mm are arranged under the branch pipes; the catch-water pipes are positioned at the bottom of the middle grain size substrates; the fine grain size substrates are arranged in a long strip shape along the direction of the water distributing branch pipes; the wetland plants are planted on the surfaces of the fine grain size substrates; the sewage seeps downwards along plant roots to form the infiltration flow; the middle grain size substrates are filled among the long strips of the fine grain size substrates and are flush with the surface; the surfaces of the middle grain size substrates are exposed to form a atmospheric reoxygenation corridor; the sewage is sufficiently contacted with the air going in and out through the atmospheric reoxygenation corridor, and is discharged via a water collecting system after the interaction with microorganism, substrates and plant roots. The invention has the advantages of no wetland clogging phenomenon under the condition of high-load water feeding, high-efficiency sewage purification, convenient construction, low cost and simple operation and management.

The invention belongs to the technical field of domestic sewage treatment, and concretely relates to a system and a method for short-cut nitrification and denitrification biological nitrogen removal of a constructed wetland, especially suitable for treating micro-polluted surface water or domestic sewage. The main body of the system provided by the invention learns from the biological nitrogen removal water purification principle, and the circulating return form design of a multistage subsurface flow wetland system is adopted, so the system has the functions of plant absorption, medium sediment adsorption and microbial degradation; and aeration, water volume / water level regulation and other treasures in the front section are adopted to construct an anoxic / anaerobic-aerobic environment in the wetland unit, so the short-cut nitrification / denitrification nitrogen removal are achieved in the same wetland unit, and the biological nitrogen removal efficiency is significantly increased. The system does not require an external carbon source, so the system is economical, and the influences of the external source on the self balance of the wetland system are avoided.