光合细菌是能进行光合作用的一类细菌,是具有原始光能合成体系的原核生物的总称。它广泛存在于自然界的水田、湖泊、江河、海洋、活性污泥及潮湿土壤中,能够以光作为能源、能在厌氧光照或好氧黑暗条件下利用自然界中的有机物、硫化物、氨等作为供氢体兼碳源进行光合作用,它表现出如固氮,固碳、降解 Photosynthetic bacteria is a class of bacteria that can carry out photosynthesis, is a generic name of prokaryotes with the original light energy synthesis system. It is widely present in paddy fields, lakes, rivers, oceans, activated sludge and moist soils in nature and can use light as an energy source to utilize organic, sulphide, ammonia, etc. in nature under anaerobic or aerobic dark conditions As a hydrogen donor and carbon source for photosynthesis, it showed such as nitrogen fixation, carbon fixation, degradation