Rhodopseudomonas palustris synchronized concentration method and application

The invention discloses a Rhodopseudomonas palustris synchronized concentration method which comprises the following steps: 1. culture medium preparation and sterilization; 2. inoculation and culture; 3. thallus synchronized treatment; and 4. physical concentration treatment. The Rhodopseudomonas palustris obtained by the method can reach 7.3*10 /g, and the thallus has uniform morphology, is in the same growth period and is efficiently revived. The invention also discloses application of Rhodopseudomonas palustris synchronized concentration. The high-concentration Rhodopseudomonas palustris prepared by the method has favorable palatability, and can be used as a biological feedstuff in the earlier culture period to provide proteins and B vitamins. In the medium/later culture period, the Rhodopseudomonas palustris can be used for regulating the water quality, is beneficial to forming dominant bacterium phases in the medium/low-layer culture water body when being periodically sprayed, and effectively inhibits pathogens.