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

The invention belongs to the field of sewage treatment, and relates to a tidal current wetland coupled electrochemical reinforced denitrification and dephosphorization method and system. The system comprises a tidal current artificial wetland aerobic bed (1), an anaerobic electrolysis bed (2) positioned on the lower part of the tidal current artificial wetland aerobic bed (1), and a system reflux pump (8) for connecting the tidal current artificial wetland aerobic bed (1) and the anaerobic electrolysis bed (2), wherein the tidal current artificial wetland aerobic bed (1) is communicated with a water inlet pipe (5) of an arranged pump, and planted with wetland plants (9); a first plate electrode (4) and a second plate electrode (11) are arranged inside the anaerobic electrolysis bed (2) and respectively connected with electrodes of a direct current power supply (3), and the bottom of the anaerobic electrolysis bed (2) is provided with a draining valve (6); and the positive and negative electrodes of the direct current power supply (3) can be exchanged regularly. The invention can reinforce the removal effect of nitrate and phosphate in the tidal current artificial wetland bed, and solve the problem that the operation of the wetland sewage treatment is greatly influenced by the seasonal changes, and the like.

The invention discloses a distributed domestic sewage treatment method. The method combines process units of anaerobic, jet oxygenation, biological oxidation, artificial wetland and the like together to perform anaerobic, aerobic and wetland ecological three-stage treatment on the domestic sewage so as to effectively reduce CODcr and BOD5 of the domestic sewage; and dephosphorization and denitrification are performed, and the effluent is stable and reaches the standards before emitting. A jet oxygenation pulse water distributor is adopted in the jet oxygenation, and the jet oxygenation pulse water distributor oxygenates the anaerobic effluent and provides pre-oxygenation treatment for a subsequent aerobic process; the biological oxidation is performed in a trickling filtration tower which is designed with 2 to 3 layers and provided with vent holes, a ceramic filler is placed in the trickling filtration tower, and the trickling filtration tower distributes water by adopting time control pulse so that the re-oxygenation effect of the trickling filtration tower can be improved and no power is consumed; and the artificial wetland is designed in an undercurrent form, proper fillers such as coal cinder, plaster, gravels and the like are placed in the artificial wetland, and pollutants can be further degraded and removed from the wetland environment. The method is suitable for standard-reaching treatment of rural or urban distributed domestic sewage.

The invention discloses a two-section type reinforced denitrification multistage soil percolation system, comprising a front-section system and a rear-section system. The front-section system is an aerating aerobic open tank body and comprises a water inlet tank, an intake water distributor, a percolation layer, a hybrid module layer, a bottom cushion layer, a bottom drainpipe and an aeration system; the rear-section system is a non-aerating anoxic enclosed tank body and comprises an intake water distributor, a percolation layer, a hybrid module layer with novel solid-phase carbon source, a bottom cushion layer and a bottom drainpipe; the front-section system and the rear-section system are connected via a connecting pipe; and the vertical height of the two tank bodies is 20 to 50 cm. The two-section type reinforced denitrification multistage soil percolation system enables nitrification and denitrification to be independently carried out in different environments, so denitrification effect can be reinforced; since a degradable polymer is used as the novel solid-phase carbon source, the system has the substantial advantages of a high denitrification rate, no chroma influence on effluent and the like; and the system is low in infrastructure cost, stable in operation effect and convenient to maintain.

The present invention relates to a batch type constructed wetland sewerage treatment method and a system thereof, wherein the system comprises a cell body, a filling, a water intake pipe, a water output pipe and a ventilating pipe. The cell body is filled with matrix filling and is provided with a ventilating pipe, wherein plants are planted in the filling. Each performance period of the system comprises four steps of feeding water, reaction, discharging water and emptying, and the system runs in a manner of an ordinal batch type and a repetitive cycle period. The water intake pipe is switched in from the upper part, and the reaeration of the system bottom at reaction stage is intensified by the ventilating pipe, which improve the nitration efficiency. After the reaction finishes, discharging is carried out by the bottom water output pipe, and then the constructed wetland is at an emptying and idlesse step, wherein the reaeration of the constructed wetland system is completed, so as to improve the nitration efficiency of the system, the oxidative decomposition of sludge and the jam of the system. The present invention has the advantages of high efficiency, excellent denitrogenation effete, small occupation of land, little energy consumption, low cost, and is not easy to be jammed.

The invention discloses an integrated treatment system for rural domestic sewage and a process of the system. The integrated treatment system comprises a tank body, and an inlet water adjusting unit, a treating unit and an effluent adjusting unit, which are sequentially communicated with one another in the tank body, wherein the treating unit comprises an anaerobic hydrolysis acidification treating chamber and a stacked ecological filter treating chamber; a zigzag sewage channel is arranged in the anaerobic hydrolysis acidification treating chamber; the inlet of the sewage channel is communicated with the inlet water adjusting unit; a filling material is arranged in the sewage channel; the stacked ecological filter treating chamber comprises an upper ecological filter and a lower ecological filter which are separate from each other; a water distribution pipe communicated with the outlet of the sewage channel is arranged at the top of the upper ecological filter; water collection gas-dispersion pipes with through holes are arranged in the upper ecological filter; the top of the water collection gas-dispersion pipes extend to positions above the upper ecological filter; the bottoms of the water collection gas-dispersion pipes are communicated with the lower ecological filter; the lower ecological filter is communicated with the effluent adjusting unit. According to the integrated treatment system provided by the invention, anaerobic hydrolysis acidification treatment and stacked ecological filter treatment processes are integrated, so that reaeration capacity of a soil seepage system is improved and a favorable condition is created for aerobic/anaerobic reaction.

The invention discloses a land strengthening treatment device for domestic wastewater. A perforated aeration pipe is inserted into the surface of a percolation medium filled in the land strengthening treatment device, thereby increasing the contact area between superficial percolation medium and air. In addition, the arrangement of the aeration pipe and an intermittent water distribution working mode are combined, during the whole infiltration and dry-off process of the wastewater, the water in the pores of the percolation medium in a water-saturated state drains under the action of gravity to generate a negative pressure, and the outside air enters the pores of the medium in the system through the aeration pipe under the drive of the pressure difference and under the diffusion action caused by oxygen concentration difference between both sides of gas-solid interfaces of the aeration holes. The reoxygenation system disclosed by the invention improves the air-to-medium mass transfer efficiency and reoxygenation effect, does not consume electric energy, is convenient to construct and is simple to manage.

The invention belongs to the technical field of environmental protection and specifically relates to a basket type artificial wetland for treating decentralized rural domestic wastewater. According to the basket type artificial wetland, a traditional artificial wetland is divided into different functional zones, such as a water distribution zone, a plant zone and an ozone zone. The partition of the functional zones is realized by use of lots of baskets. As a result, construction, surface substrate replacement and wetland system aeration can be performed conveniently, and furthermore, the processing capability of the wetland can be improved and the subsequent maintenance of the wetland can be realized conveniently.

The invention discloses an unpowered reoxygenation water inflow system of a subsurface flow artificial wetland in a northern cold region. A water inflow pipe, a water inflow flange, a gas-liquid mixing chamber, a water effluent flange and a water outlet pipe are successively installed on the same centre line and are all buried below a soil permafrost; one end of the gas-liquid mixing chamber is connected with the water inflow pipe by the water inflow flange, and the other end of the gas-liquid mixing chamber is connected with the water outlet pipe by the water effluent flange; one end of an air suction pipe extends out of the ground surface and then is communicated with atmosphere, and the other end of the air suction pipe extends into the gas-liquid mixing chamber; only half pipe wall, which is adjacent to the side of the water inflow pipe, of the air suction pipe which extends into the gas-liquid mixing chamber is reserved, and the half pipe wall is called a negative-pressure baffle the circular arc face of which faces to water; and the air suction pipe, the water inflow pipe and the water effluent pipe have the same internal diameter which is 0.5 time that of the gas-liquid mixing chamber. By means of the unpowered reoxygenation water inflow system disclosed by the invention, the wetland water inflow dissolved oxygen content can be increased and the problem that the subsurface flow wetland in the northern cold area can not normally operate in winter can be effectively solved.

The invention provides a potential-energy biological sewage purifier. The potential-energy biological sewage purifier consists of a plurality of modified potential-energy reoxygenation biological rotating discs, wherein the plurality of modified potential-energy reoxygenation biological rotating discs are arranged in a spiral step shape; the sewage spirally flows through the plurality of modifiedpotential-energy reoxygenation biological rotating discs from top to bottom; and for the vertically adjacent modified potential-energy reoxygenation biological rotating discs, a third water outlet ofthe modified potential-energy reoxygenation biological rotating disc positioned at the upper part communicates with a second reoxygenation tank of the modified potential-energy reoxygenation biological rotating disc positioned at the lower part. According to the invention, sewage is allowed to intermittently pass through the modified potential-energy biological rotating disc for large-oxygen reoxygenation and air stripping through water head potential energy; and through treatment of the layer-by-layer modified potential-energy biological rotating disc, reoxygenation efficiency is high and energy consumption is low.

The invention discloses an overall ecological remediation system of an eutrophic plain river network. The overall ecological remediation system comprises an upstream river network area, a downstream river network area, a front river network trunk channel, a rear river network trunk channel, branch river network channels, a backflow channel, a residue removing device, an oil partitioning device, a high-breeding-density filtering fish breeding pool and a water level raising device, wherein the backflow channel is arranged between the downstream river network area and the upstream river network area; the residue removing device, the oil partitioning device, the high-breeding-density filtering fish breeding pool and the water level raising device are sequentially arranged on the backflow channel; water in the downstream river network area is raised by the water level raising device through the residue removing device, the oil partitioning device and the high-breeding-density filtering fish breeding pool in sequence, and is fed into the front river network trunk channel together with water in the upstream river network area. The overall ecological remediation system has the advantages that the ecological remediation effect is easy to manage and control, the operation cost is low, nitrogen and phosphorus in a water body can be greatly reduced, and the area of a river network is barely occupied.

The invention discloses an artificial rapid percolation system for improving the treatment capability upon pollutants such as nitrogen and phosphorus in rainwater through medium modification. The system aims at the defect that a conventional artificial rapid percolation system is poor in nitrogen and phosphorus removal effect, and the removal capability of the system upon nitrogen and phosphorus is improved by modifying vermiculite with chitosan and optimizing technological parameters of the system. According to the technology, modified vermiculite is mixed with river sand soil proportionally,water is distributed once every other 48 hours with a hydraulic load of 2m/d, the water is fed once for 3 hours, falling drying is performed for 45 hours, the soil thickness is 70-100cm, the water isfed in sections at 30cm under a soil layer according to a ratio of 2:1, and up-to-standard treatment on nitrogen and phosphorus pollutants, of the artificial rapid percolation system, can be achievedunder the process conditions. In general, the system is simple in structure, small in floor space and good in treatment effect.

The invention discloses a three-dimensional vertical subsurface flow constructed wetland device, belongs to the fields of environmental sciences, environmental engineering, and water supply and drainage science and engineering, and relates to a three-dimensional vertical subsurface flow constructed wetland device used for advanced treatment of domestic sewage. The invention is characterized in that the three-dimensional vertical subsurface flow constructed wetland device comprises an upper layer water inlet water distribution channel 1, an upper layer constructed wetland left unit 2, an upperlayer constructed wetland right unit 3, an upper layer water passage 4, a middle layer water inlet water distribution channel 5, a middle layer constructed wetland left unit 6, a middle layer constructed wetland right unit 7, a middle water passage 8, a lower layer water inlet water distribution channel 9, a lower layer constructed wetland left unit 10, a lower layer constructed wetland right unit11, a lower layer total water outlet passage 12 and a water outlet pipe 13. The device can reduce a land occupied area and increase plant biomass, is strong in reoxygenation ability, and can fully present cological landscape functions, reduce the cost of pipe network construction, and reduce the risk of groundwater pollution.

The invention discloses a refined regulation and control method of an intensive sewage ecological treatment device, and belongs to the field of sewage treatment. The device comprises a water storage and distribution unit, a treatment unit and a composite parameter regulation and control system, and the composite parameter regulation and control system consists of an online dissolved oxygen (DO) detector, an online temperature detector, an online oxidation-reduction potential (ORP) detector, an online pH detector, a valve and a computer regulation and control system. The regulation and controlprecision of the sewage treatment process is remarkably improved by monitoring composite parameters such as a DO value, a pH value, an ORP value and a temperature value in the sewage in real time, a water distribution type and a circular treatment flow of a sewage ecological treatment process are constructed, and an integrated type intensive sewage ecological treatment device composed of a water storage and distribution unit and a treatment unit is formed, so as to ensure the efficient denitrification effect and stable effluent quality of the sewage ecological treatment system.

The invention relates to an oily wastewater treatment method which is characterized by comprising the following steps of: adding one advanced oxidation treatment device (CAOT) capable of generating activated gas containing OH- between any two treatment apparatuses in the conventional wastewater treatment technology, mixing the wastewater flowing out of the first treatment apparatus with air of activated gas containing OH- generated by the advanced oxidation treatment device (CAOT), generating CAOT activated water in the wastewater, leading the wastewater containing the CAOT activated water into a catalytic bed to perform a catalytic reaction with a catalyst, leading the products into the second treatment apparatus to improve the purification and separation capability of the second treatment apparatus, controlling the volume ratio of the OH- activated gas to the wastewater between 1% and 20%, and controlling the residence time of the wastewater on the catalytic bed between 2 s and 1500 s. The oily wastewater treatment method has the advantages of low investment and low cost, and the emission standards and the treatment efficiency are improved.