Abstract: Disclosed are a catalyst component and a catalyst for olefin polymerization, and an olefin polymerization method. The catalyst component comprises magnesium, titanium, a halogen and an internal electron donor, wherein the internal electron donor comprises a monocarboxylic acid ester compound and a diether compound, and the molar ratio of the monocarboxylic acid ester compound to the diether compound is (0.0035-0.7):1. By using the catalyst, a polymer having both a high isotactic index and a high melt flow index can be prepared.

Abstract: Disclosed is a rotating cored-type biological treatment device for wastewater with low carbon content and use thereof. The device includes a composite frame (1), several biological packing columns (2), a rotating tray (3), a rotating shaft, and a base (4), wherein the biological packing columns (2) are detachably mounted inside the composite frame (1); the rotating shaft is vertically arranged on the base (4) and can rotate; the rotating tray (3) is fixedly sheathed on the rotating shaft, and the composite frame (1) is disposed on the rotating tray (3); and the rotating tray rotates with the rotating shaft, which driving the composite frame (1) and the biological packing columns (2) therein to rotate. The rotating cored-type biological treatment device has the advantages of high efficiency and being renewable and environment-friendly, etc.

Abstract: The present invention discloses a highly effective in situ treatment method for endogenous pollution in sludge, belonging to the field of environmental engineering water treatment. In view of the problem that it is difficult to effectively treat the endogenous pollution of river sludge, the present invention provides the highly effective in situ treatment method for endogenous pollution in sludge, which specifically adopts a combination of phoslock, calcium peroxide and aluminum modified zeolite to perform in-situ remediation of sludge, effectively inhibit the release of endogenous pollution of sludge, facilitate the ecological treatment of polluted water subsequently, and finally realize the long-term water improvement against pollution.

Abstract: Disclosed is a rotating cored-type biological treatment device for wastewater with low carbon content and use thereof. The device includes a composite frame (1), several biological packing columns (2), a rotating tray (3), a rotating shaft, and a base (4), wherein the biological packing columns (2) are detachably mounted inside the composite frame (1); the rotating shaft is vertically arranged on the base (4) and can rotate; the rotating tray (3) is fixedly sheathed on the rotating shaft, and the composite frame (1) is disposed on the rotating tray (3); and the rotating tray rotates with the rotating shaft, which driving the composite frame (1) and the biological packing columns (2) therein to rotate. The rotating cored-type biological treatment device has the advantages of high efficiency and being renewable and environment-friendly, etc.

Abstract: The present invention discloses a highly effective in situ treatment method for endogenous pollution in sludge, belonging to the field of environmental engineering water treatment. In view of the problem that it is difficult to effectively treat the endogenous pollution of river sludge, the present invention provides the highly effective in situ treatment method for endogenous pollution in sludge, which specifically adopts a combination of phoslock, calcium peroxide and aluminum modified zeolite to perform in-situ remediation of sludge, effectively inhibit the release of endogenous pollution of sludge, facilitate the ecological treatment of polluted water subsequently, and finally realize the long-term water improvement against pollution.

Abstract: The present disclosure relates to methods for cooperative control of microcystis aeruginosa by using chub, bighead, catfish and daphnia, and belongs to the technical field of water treatment. The microcystis aeruginosa in a water body is controlled using a food chain relationship; the chub, the bighead, the catfish and the daphnia can directly eat the microcystis aeruginosa in a filtering manner; and meanwhile, the chub, the bighead and the catfish also can intake the daphnia, so as to indirectly consume the microcystis aeruginosa in the water body, wherein the fishes, the daphnia and the microcystis aeruginosa form the food chain relationship; in addition, the microcystis aeruginosa at the upper, middle and lower layers and a microcystis aeruginosa hypopus at the bottom layer can be controlled by fully utilizing the vertical spatial distribution difference of the three fishes in the water body.

Abstract: The present disclosure relates to methods for cooperative control of microcystis aeruginosa by using chub, bighead, catfish and daphnia, and belongs to the technical field of water treatment. The microcystis aeruginosa in a water body is controlled using a food chain relationship; the chub, the bighead, the catfish and the daphnia can directly eat the microcystis aeruginosa in a filtering manner; and meanwhile, the chub, the bighead and the catfish also can intake the daphnia, so as to indirectly consume the microcystis aeruginosa in the water body, wherein the fishes, the daphnia and the microcystis aeruginosa form the food chain relationship; in addition, the microcystis aeruginosa at the upper, middle and lower layers and a microcystis aeruginosa hypopus at the bottom layer can be controlled by fully utilizing the vertical spatial distribution difference of the three fishes in the water body.