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

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 composite algae removal method for graphene oxide. The composite algae removal method comprises the following steps: (1) adding a CuSO4 or CdCl2 algae removal into a solution containing blue algae, and controlling the Cu<2+> concentration in the solution to be 0.05-0.10mg / L or controlling the Cd<2+> concentration in the solution to be 0.4-0.7mg / L; (2) adding graphene oxide into the solution, controlling the concentration of the graphene oxide to be 0.8-10mg / L, and separating floc in the solution after stirring, thereby completing algae removal. Compared with the prior art, the graphene oxide is added and can be adsorbed on the surfaces of algae cells, so that heavy metals in water can be enriched by a nano material when a little nano graphene oxide and the heavy metal ions co-exist in water, and the algae removal efficiency of the heavy metals is greatly improved.

The invention provides a method and equipment for ultrasonically removing algae based on solar power generation. The method comprises the following steps: collecting algae-contained water, ultrasonically removing algae, filtering the algae-contained water, and collecting dry algae. The equipment comprises a power unit, an algae collecting unit, an algae filtering unit, an algae drying unit, a dry algae storage bin and a bearing body, wherein the power unit is composed of a solar power generator set, a storage battery, an inverter and a power supply controller, and the bearing body is used for bearing the power unit, the algae collecting unit, the algae filtering unit, the algae drying unit and the dry algae storage bin; the algae collecting unit comprises a water storage tank, a forceps clip and an algae removing tank; the algae filtering unit sequentially comprises a drainage tank, a shaker and a filtering tank from bottom to top, and a scraper and a filtering layer are arranged in the filtering tank; the algae drying unit is composed of a preheating algae drying unit, a drying box and a steam outlet pipe with a gas pump. The method has a good algae removing effect and cannot generate secondary pollution to water. The equipment integrates algae removing, algae drying and algae collecting functions and is thorough in algae removal and low in algae removal cost.

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 efficiently removing algae from water bodies utilizing ultrasonic-treated carbon nanotubes. The method comprises the steps of: firstly adding carbon nanotubes to tap water to prepare carbon tube aqueous solution with certain mass concentration; secondly adjusting the pH value of the carbon tube aqueous solution to 5.0-9.0 with NaOH solution or HCl solution; then placing a container holding the carbon tube aqueous solution with pH value adjusted in an ultrasonic device; and finally adding the ultrasonic-treated carbon tube suspension to water bodies containing algae, quickly stirring and shaking uniformly, and then standing and settling the mixed liquid of carbon nanotubes and algae to efficiently remove algae from the water bodies. According to the invention, the used carbon nanotubes are a novel carbon material, which has strong agglomeration and settling capability to algae; and as compared with the traditional carbon material such as activated carbon, the carbon nanotubes have higher removal rate and higher removal speed of algae, and are simple in operation and wide in application conditions.

The invention discloses a chitosan-modified clay method and its application in algae removal technology; the clay is modified with 0.2-2 mg / mL dilute acid chitosan solution, and the modified clay and traditional coagulant are in a mass ratio of 1 :2~2:1 compounding, by adding cationic surfactants to increase the stability of dissolved air water bubbles and enhance the hydrophobicity of algae, the components of several agents are compounded with each other to produce a synergistic effect. The composite coagulant of the invention has fast flocculation speed, strong adsorption bridging ability and low cost, and does not contain harmful components to human body. The modified clay and coagulant prepared in the previous stage are compounded and added, and the surfactant is added under stirring, and most of the algae in the water are removed through the dissolved air flotation device. After the raw water is dosed, the dissolved air flotation method is used for solid-liquid separation, and the content of chlorophyll a (Chl‑a) can be reduced to 5 μg / L, and the removal rate can reach more than 95%.