Photosynthetic bacteria contribute to purify the sewage, according to the changes of microbial flora in succession as i) heterotrophs, ii) photosynthetic bacteria, and iii) algae.
The bacterial cells are used as the feed of animal planktons and baby fish.
In the light of the facts mentioned above, treatment of domestic fowls' excrements by photosynthetic bacteria was performed and the treated solution was supplied to fish pond. As a result, it was observed that the baby fish could grow very well and if the suitable amounts of the photosynthetic bacteria treated solution were added, the survival population was remarkably increased over control.
Photosynthetic bacterial cells (Rhodopseudomonas capsulatus species) contain 57.9% protein and 200γ% vitamin B12.
