47results about How to "Low operating and management costs" patented technology

The invention discloses a method for utilizing high-load earthworm biological filter to treat decentralized sewage in countries, and relates to a sewage treatment method. The treatment method comprises the following steps: the decentralized sewage in the countries is firstly collected; suspended matter and floating matter are removed by a pretreatment tank; BOD5 is led to be 110 to 160mg / L, COD is 120 to 150mg / L and SS is 90 to 130mg / L; then the obtained mixture is pumped into the high-load earthworm biological filter according to hydraulic loading of 4 to 6m<3>(m<2> question mark d); after passing through a first earthworm biological filtering layer and a second earthworm biological filtering layer which are filled with light shale spherical porcelain granules (7) filtering media with the diameter of 3 to 7mm and 15000 to 28000 eisenia foetidas (8) are added on the surface of the filtering media per square meter, the water which is discharged from a settling tank (6) and has BOD5 of less than 15mg / L, COD of less than 60mg / L and SS of less than 15mg / L reaches the national water quality standard for field irrigation; little amount of residue sludge which is collected by the settling tank (6) and contains wormcast is used for improving the soil or is used as fertilizers. The method has large hydraulic loading, small occupy area, is hard to be blocked, has simple process and operation, good water outlet quality and low construction cost and operating cost and can be widely used for treatment of the waste water in rural areas.

The invention discloses an electric power repairing device and method for a cylindrical arrangement electrode, and belongs to the technical field of environment protection equipment. The device comprises an electrode liquid storage tank , an electrode liquid valve, at least two circular ring-shaped or arc electrode chambers and electrodes with a common center, an electrode liquid flowmeter, a liquid adding pump valve, a liquid adding pump and an adsorption layer, wherein the electrode is positioned in the electrode chamber and is connected with an external direct current power supply; and the electrode chamber is connected with the liquid adding pump. The method comprises the following steps of: selecting appropriate number of the electrode chambers according to pollution situation of a to-be-processed pollution site, burying the electrode chambers and the electrodes underground, injecting the electrode liquid into the electrode chambers through the liquid adding pump, and electrifying the electrodes so that heavy metal ions in the pollution site are adsorbed on adsorption material on the adsorption layer and the heavy metal is removed. The device is simple in structure, convenient to use, low in construction cost and wide in use range; and the method has the advantages of economical efficiency, high efficiency, energy saving, rapidness and the like.

The invention provides a bioelectrocatalysis coupled contact oxidation denitrification filtration integrated bio-reactor which is characterized by comprising a bioelectrocatalysis pool, and a first water collection tank, a contact oxidation pool, a denitrification pool, a second water collection tank and a filtering basin which are arranged in sequence around the bioelectrocatalysis pool, whereinthe bioelectrocatalysis pool is used for performing bioelectrocatalysis on pollutants and comprises a hollow columnar electrocatalysis pool body, a cathode and an anode; the cathode is arranged alongan inner wall of the pool body; the anode is positioned in the middle of the pool body; a water inlet is formed in the electrocatalysis pool body; the first water collection tank is communicated withthe upper part of the electrocatalysis pool; the contact oxidation pool is communicated with the lower part of the first water collection tank and is used for performing biological contact oxidation degradation and carrying out a nitrification reaction of nitrogen; a plurality of aerators are arranged at the bottom of the contact oxidation pool; the denitrification pool is communicated with the upper part of the contact oxidation pool and is used for carrying out a denitrification reaction; the second water collection tank is communicated with the upper part of the denitrification pool; and awater outlet is formed in the upper part of the filtering basin.

The invention discloses an energy-saving and consumption-reducing method for an air supply system of a metallurgy blast furnace. Processing air is delivered into a rotary dehumidifier through an air filter for air dehumidifying, required regenerating wind of the rotary dehumidifier is heated to above 60 DEG C while residual heat of slag washing water of the blast furnace is used as a heat source, the processing air is heated from ambient temperature to less than 50 DEG C at the same time, and cooled slag washing water is reused in blast furnace slag washing process for cyclic utilization. The processing air is further heated to 1200 DEG C through a preheater I, a blower, a preheater II and a hot-blast stove and sent to the metallurgy blast furnace. The method of the invention fully utilizes the residual heat of the originally discharged slag washing water, decreases discharge of the residual heat of the slag washing water, and reduces thermal pollution to environment. Cooling equipment of a cooling tower is canceled while rotary dehumidifying equipment replaces original cooling dehumidifying system, thereby realizing energy saving and consumption reduction for the air supply system of the blast furnace and achieving dual objectives of energy saving and emission reduction.

The invention discloses a landscape-type recycled water treatment wetland system suitable for an urban community, which comprises a wetland pool; reed, zizania aquatica, water willow and scirpus validus vahl are planted in the wetland pool; rows of the zizania aquatica, water willow and scirpus validus vahl are mixed among the rows of the reed; and the rows of the zizania aquatica, water willow and scirpus validus vahl mixed among the rows of the reed are single or various. The landscape-type recycled water treatment wetland system has the advantages that: the system has high efficiency for water purification, high yield of vegetation, wide range of application, low construction cost, convenient operation and management, good landscape effect and large wetland evapotranspiration.

The invention discloses a labyrinth ultra-low-pressure trickle irrigation emitter. The trickle irrigation emitter is in a tubular structure with a through hole in the middle. The structure is composed of a labyrinth section, a water outlet section and a connecting section sequentially, wherein the maximum sizes of outer tube diameters of the labyrinth section and the connecting section are the same, a water inlet is arranged at the labyrinth section, a water outlet is arranged at the water outer section, the water inlet and the water outlet are connected through a flower type energy dissipation channel, and the flower type energy dissipation channel is disposed in the tubular wall of the labyrinth section. According to the labyrinth ultra-low-pressure trickle irrigation emitter, a dedicated water pump is not needed, the working pressure is low, the operating coat is low, and the emitter can work normally under the water pressure of the water level of 1.5m; walls of used tubes and pipe fittings are thin, requirements for material strength are not high, the construction cost is low, internal connecting type pipe fittings are adopted, and installation is convenient; the emitter is designed into a plug-and-play mode and easy to dismount for washing, and operating and management costs are low; pipe network laying is flexible and convenient; and users can freely change the spacing of emitters according to different crop spacing between rows and lay pipe networks flexibly.