Abstract: The present invention discloses a Streptomyces sp. strain and a method for preparing a sulfide oxidase preparation from the same. This strain is a Streptomyces sp. strain DS021-Z5D2 which is a mutant having a high yield of sulfide oxidase obtained by taking a Streptomyces sp. strain DS021 as a starting strain and performing strain mutation by means of compound mutation of ultraviolet light and diethyl sulfate, and the preservation number is CGMCC No. 12808. This strain has the advantages of quick growth speed, high enzymatic productivity and the like. When this strain is fermented by a high-density fermentation method, this strain can produce sulfide oxidase preparations at a high yield. This strain has the advantages of inexpensive and easily-available culture substrates, high enzymatic productivity, short fermentation period, low production and use cost, and the like.

Abstract: The example of the present invention discloses a klebsiella sp. strain and a method for preparing a microbial flocculant from the same. This strain is a Klebsiella sp. strain LDX1-1 which has been preserved in the China General Microbiological Culture Collection Center on Sep. 7, 2015, and the preservation number is CGMCC No. 11330. This strain can be used for preparing a microbial flocculate in an activated fermentation way.