Biological flocculant as well as preparation method and application thereof

The invention discloses a biological flocculant, which belongs to the field of environment-friendly microorganisms and is prepared from the following raw materials in parts by weight: 70 to 90 parts of bacillus halophilus LH-B.0015 fermentation liquor, 5 to 15 parts of bentonite, 1 to 5 parts of diatomite, 1 to 5 parts of ferrous sulfate, 1 to 5 parts of magnesium carbonate and 2 to 5 parts of calcium chloride. The invention also discloses a preparation method and application of the biological flocculant. The salt tolerance range of the halophilic bacillus amyloliquefaciens LH-B.0015 contained in the biological flocculating agent is 1%-30%, and the flocculating agent can be synthesized within the salinity range of 1%-25%. The strain is used for biological flocculation in a high-salt environment, can effectively solve the flocculation problem in the high-salt environment, reduces the treatment cost, and has a good application prospect. 本发明公开了一种生物絮凝剂，属环保微生物领域，该生物絮凝剂由以下重量分数的原料组成：70份~90份嗜盐鱼芽孢杆菌LH-B.0015发酵液，5份~15份