46results about How to "High algae removal efficiency" patented technology

The invention belongs to the technical field of environmental protection, and particularly relates to a method and a device for stream guidance and enrichment of blue-green algae in a large water area. With the adoption of the method and the device for the stream guidance and the enrichment of the blue-green algae in the large water area, a certain area which is in shore, and in which the guiding wind is in the downwind direction in the large water area is selected as a blue-green algae stream guidance and enrichment area; a blue-green algae stream guidance and enrichment device is established by utilizing an arched soft algae blocking enclosure and a stream guiding door of which the two sides are in shore; large-scale blue-green algae from outside is guided and gathered to the two sides of the shore by utilizing the arched soft algae blocking enclosure; and the blue-green algae is guided into the enrichment area by utilizing timely opening and closing of the stream guidance door, or the enriched blue-green algae is prevented from blowing and escaping with wind; wind waves in the enrichment area can be reduced by the blue-green algae stream guidance enrichment device, so that the blue-green algae in the enrichment area can always float onto the water surface, and is conveniently to be absorbed and cleared continuously; and in addition, a blue-green algae stream guiding enrichment trap and an efficient algae absorbing area are constructed at one side close to the bottom shore in the blue-green algae stream guidance and enrichment area by utilizing vantage ground, so that the blue-green algae in the enrichment area is further enriched for second time to the area, and is conveniently efficiently absorbed and cleared.

The invention relates to a low-cost, environmental-protection and high-efficiency alga removal combination material. The high-efficiency alga removal combination material capable of rapidly eliminating algae in water and continuously reducing the alga bloom risk of water is disclosed against abundant growth of alga bloom in water reservoirs, lakes, drinking water sources or scenic water. The high-efficiency alga removal combination material comprises a natural mineral modified material and a removal assistant. The natural mineral modified material mainly comprises zeolite, active carbon, mica powder, kaolin or diatomite and other macro-porous mineral matter powders as raw materials, and can adsorb and co-precipitate alga particles and phosphates through acid modification and function group fixing. The modified material can be added to eutrophic water in an in situ manner, and can also be used in drinking water factories. When in situ addition is carried out, the natural mineral modified material is only added if the density of algae in water, and the removal assistant is added if the density of the algae is high in order to improve the effect. The alga removal material does not use toxic substances in the modification process, can efficiently remove algae in the water, and also can remove nitrogen and phosphorus, reduce release of intracellular toxic substances and reduce the alga bloom risk. The natural mineral modified material is especially suitable for alga control of the drinking water sources, the lakes and urban landscape waters, or is used in stringent control or risk prevention of the alga bloom.

The invention discloses a high-efficiency combined purification system for algae-containing wastewater treatment, which comprises a purification container. The system is characterized in that the purification container is sequentially composed of a filter chamber (1), a plasma reaction chamber (2), a flocculating chamber (3) and a water collection chamber (4) from bottom to top, wherein a filter screen is arranged between the filter chamber (1) and the plasma reaction chamber (2); a screen layer is arranged between the plasma reaction chamber and flocculating chamber; the purification container is provided with a water inlet at the filter chamber, and also provided with a water outlet at the water collection chamber. By adopting the integrated combination technique, the system has the advantages of small occupied area, high algae removal efficiency, low reagent consumption and favorable quality of effluent water. By adopting the plasma discharge for oxidization and algae removal, the system greatly lowers the emission of malodorous gas, and reduces the pollution of the malodorous gas to the atmospheric environment. The system has high algae removal rate and favorable removal effect for SS (suspended sediment) and CODcr (chemical oxygen demand).

The invention relates to a method for removing algae by applying micro-bubble air flotation of a multiphase flow pump. The method comprises the following step of releasing air dissolved water below a water body containing an algal layer, wherein the air dissolved water is formed in such a way that air and natural water simultaneously enter the multiphase flow pump under the action of negative pressure, dispersed air is cut many times by using a multistage impeller rotating at high speed in the multiphase flow pump, the air is instantly dissolved into the natural water in a highly dispersed state in a high pressure environment in the multiphase flow pump and rapidly saturated, and then is stabilized and contacted by an air dissolved tank for 50seconds-1hour, and the air dissolved water contains a great number of micro air bubbles with the diameter of small than 30mum, and the air dissolved water is released by decompressing to a position 0.3-1.2m away from the downside of the water body containing the algal layer. The method has the advantages of ideal air flotation effect achieved without adding a coagulant, no secondary pollution, no limitation of minimum water treatment quantity, simple process equipment, low device energy consumption and high system operation stability.

The invention discloses an algaecide, a preparation method thereof and an algae removing method. The algaecide is prepared from the following raw materials of red earth and a flocculating agent which are (1.2 to 10) to 1 in mass ratio. In the algaecide disclosed by the invention, the flocculating agent has a modification function on the red earth, so that the problem of worse and instable sedimentation caused by single use of the flocculating agent is avoided, and the algae removing efficiency is increased.

The invention discloses a double-hull type algal bloom removal device, which is composed of a double hull, an aeration device, a slag scraping device and a slag collection device, the aeration device is installed between the bows of the double hull, and the slag scraping device is installed on the double hull In the rear part of the middle of the hull, the slag collection device is fixed at the tail of the double hull. The aeration device adopts the device of the vortex concave air flotation machine; the slag scraping device adopts the rotary chain device with nylon net; the slag collecting device adopts the screw conveying press integrated machine. The device has the advantages of simple structure, easy operation, energy saving, low cost, high algae removal efficiency, no need for manual fishing, and no secondary pollution. It is suitable for the removal of algae in various water bodies such as rivers, lakes and river courses.

The invention discloses a magnetic high-efficiency algaecide and a preparation method and application thereof. The preparation method comprises mixing of nano-ferroferric oxide and allelochemicals, wherein the allelochemicals comprise p-hydroxybenzoic acid and/or coumarin. The problems that when nano-materials are used to remove algae, algae cells may desorb under the conditions of wind power andwater conservancy to cause large re-emerge of the algae because the nano-materials are often reversible in adsorption can be solved.

The invention belongs to the technical field of algae removal and particularly relates to a preparation method of an environment-friendly algicide. The preparation method comprises the following steps: firstly, treating towel gourd vegetable sponge with hydrogen peroxide to reduce the content of crude fibers inside the towel gourd vegetable sponge; secondly, mixing the treated towel gourd vegetable sponge with acrylic acid, polyglutamic acid, N,N-methylene bisacrylamide and the like, and using potassium peroxodisulfate as an initiator to obtain towel gourd vegetable sponge-supported degradable super absorbent resin; thirdly, extracting algae removing enzyme inside neocaridina denticulate and algae removing beneficial substances in fructus xanthii and radix stemonae; mixing a carrier with extracts, and adsorbing beneficial substances in the extracts; and meanwhile, adding urea for mixing to obtain the environment-friendly algicide. The algicide prepared by the preparation method disclosed by the invention has the characteristics of stability, high removal efficiency and environment friendliness; after the environment-friendly algicide is put into a water body and is used for 40 to 60 minutes, harmful algae in the water body can be settled to the water bottom, and the algae removal rate reaches 96.2 percent or above; and in addition, after the algicide is used, secondary pollution to the water body is avoided.

The invention discloses a rapid underwater algae removal mechanical device. The mechanical device comprises a duckweed removal device body A and an algae removal device body B, an opening is formed inthe center of the bottom of the duckweed removal device body A, the duckweed removal device body A sleeves the algae removal device body B through threads, the duckweed removing device body A comprises a duckweed removal outer barrel (17), a top cover (15) covers a top opening of the duckweed removal outer barrel (17) in a sealed mode, a cylindrical check ring (16) with the depth smaller than thedepth of the duckweed removal outer barrel (17) is fixedly arranged on the inner bottom surface of the top cover (15), blades (14) are arranged in the cylindrical check ring (16), the algae removal device body B comprises an algae removal outer barrel (7), a coarse filter screen (3) is arranged at a water inlet in the side wall of the top edge of the algae removal outer barrel (7), an algae removal device top cover (2) covers a top opening of the algae removal outer barrel (7) in a sealed mode, and a filter barrel (4) of a stainless steel filter screen is concentrically arranged in the algaeremoval outer barrel (7). The mechanical device has the advantages that the algae removal and duckweed removal functions can be achieved, the use is simple, the algae removal efficiency can be improved, the energy source for extracting algae liquid can be saved, and the automatic cleaning function can be achieved.

The invention relates to a flotation device and method for treating cyanobacterial bloom in a eutrophicated water body. The device comprises a ship hull which operates on the water surface in a flotation-type working mode, wherein the flotation type comprises floatation and travel; the front part of the ship hull is provided with an infrared obstacle evasion device for the ship hull to evade obstacles on the water surface; the back part of the ship hull is provided with an aeration device which is positioned underwater and used for supplying oxygen to the water body; the peripheral side of the front part of the ship hull is also provided with a plurality of ultrasonic transducers for emitting ultrasonic to remove and inhibit algal growth; the back part of the ship hull is provided with solar panels which are oblique relative to the horizontal surface; the solar panels are used for transmitting the converted electric power to a power supply system on the ship hull, so that the electric power can be used by the complete device; and the tail of the ship hull is provided with a propeller for driving the ship hull to travel. The device can make a turn when meeting an obstacle; the aeration device is utilized to enhance the self-purification capacity of the water body, thereby enhancing the cyanobacterial bloom treatment efficiency; and the device has the advantages of low manufacturing cost and low operating cost.

The invention discloses a mobile ultrasonic algae removal device, which comprises an overwater moving carrier and an ultrasonic algae removal mechanism, wherein the overwater moving carrier is provided with a base, and a through cavity is formed in the center of the base; and the ultrasonic algae removal mechanism is fixed in the through cavity of the base and comprises a supporting component fixed to the base and an ultrasonic algae removal component fixed to the supporting component in the vertical direction, the ultrasonic algae removal component comprises a plurality of first ultrasonic algae removal parts and a plurality of second ultrasonic algae removal parts, the first ultrasonic algae removal parts and the second ultrasonic algae removal parts are arranged on the supporting component at intervals in a staggered mode, and the frequencies of the ultrasonic waves emitted by the two are different. The ultrasonic algae removal mechanism is arranged on the overwater moving carrier, so that the device can travel to an area where algal blooms occur in time, ultrasonic algae removal treatment is performed in time, and the device is convenient, rapid and high in algae removal effect rate.

The invention relates to an algae-collecting algae-blocking and algae-guiding surrounding separation system, and belongs to the technical field of ecological restoration. The algae-collecting and algae-blocking and algae-guiding surrounding separation system comprises a algae-blocking embankment, a flow-pushing device, a gate and an artificial wetland; the algae-blocking embankment is arranged inthe water body, the two ends of the algae-blocking embankment extend to an embankment, the top of the alga-blocking embankment is provided with an inwards-concave algae guiding ditch, and the height of the algae-blocking embankment is gradually reduced from the middle to the two ends, the height of the groove bottom of the algae guiding ditch is gradually reduced from the middle to the two ends, and the lowest point of the top of the algae-blocking embankment is higher than the water surface; a plurality of flow pushing devices are arranged in the algae guiding ditch at intervals; the two endsof the alga guiding ditch are respectively provided with a gate; and the artificial wetland is positioned in an area surrounded by the algae-blocking embankment and the embankment. According to the surrounding separation system, the algae removal and ecological restoration are combined, no negative influence is caused to the environment, the surrounding separation system can be applied to a largewater area, is relatively high in algae removal efficiency, algae substances in the water body do not need to be fished manually, the labor intensity of workers is reduced, and meanwhile, the algae substances in the water body can be salvaged by replacing other energy consumption equipment.

The invention discloses a method for controlling algae in water, which comprises the following steps: (1) adding a reducing agent to the water to-be-treated, wherein the reducing agent is selected from one of sulfite, pyrosulfite, thiosulfate and sulfide, and controlling the dissolved oxygen in water to be less than 2 mg/L, wherein the treatment time is 0.5 to 20 minutes; and (2) placing the watertreated in step (1) in a closed reactor, controlling the dissolved oxygen in the water to be less than 0.5 mg/L, and performing ultraviolet irradiation treatment; or treating the water to-be-treatedby neocaridina denticulata biological treatment, and performing further processing by the steps (1) and (2). The control method of the invention can achieve effective removal and thorough control of algae cells safely, economically, efficiently and stably.