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Wastewater Spawned Infectious Disease
Published in Frank R. Spellman, Fundamentals of Wastewater-Based Epidemiology, 2021
Anoxygenic photosynthesis does not produce O2 and, in fact, occurs in the complete absence of O2. The bacteria involved in anoxygenic photosynthesis are largely strict anaerobes, unable to function in the presence of O2. They obtain energy by reducing inorganic compounds. Many photosynthetic bacteria utilize reduced S compounds or element S in anoxygenic photosynthesis according to the following equation: H2S→So+2H++2e−
Wastewater Treatment Operations
Published in Frank R. Spellman, Handbook of Water and Wastewater Treatment Plant Operations, 2020
Anoxygenic photosynthesis does not produce O2 and, in fact, occurs in the complete absence of O2. The bacteria involved in anoxygenic photosynthesis are largely strict anaerobes, unable to function in the presence of O2. They obtain energy by reducing inorganic compounds. Many photosynthetic bacteria utilize reduced S compounds or element S in anoxygenic photosynthesis according to the following equation: H2S→So+2H++2e−
Physiological Classification of Prokaryotes
Published in Volodymyr Ivanov, Environmental Microbiology for Engineers, 2020
There are three related physiological groups of phototrophs that use three different ways to generate biologically available energy, as described in the following: Some phototrophs use the products of fermentation (organic acids, alcohols, hydrogen) as donors of electrons, and light as a source of energy, to reduce CO2 (anoxygenic photosynthesis with organics as electron donors):CH3COOH+CO2+lightenergy→〈2CH2O〉+CO2where the empirical formula CH2O show carbohydrates.Some phototrophs use the products of anoxic respiration (H2S, Fe2+, and possibly also CH4 but that is unknown at present) as donors of electrons, and light as a source of energy, to reduce CO2 (anoxygenic photosynthesis with inorganics as electron donor):2H2S+CO2+lightenergy→〈CH2O〉+2S+H2O.Other phototrophs use the product of aerobic respiration (H2O) as a donor of electrons, and light as a source of energy, to reduce CO2 (oxygenic photosynthesis):H2O+CO2+lightenergy→〈CH2O〉+O2
Green hydrogen production by Rhodobacter sphaeroides
Published in Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2023
Dahbia Akroum-Amrouche, Hamza Akroum, Hakim Lounici
Anoxygenic photosynthetic bacteria have the common peculiarity of being able to perform photosynthesis anaerobically and without producing oxygen. Non-oxygenated bacteria are the oldest evolutionarily, their photosynthesis is fundamentally anaerobic, non-oxygen producing. Since its first description by Van Neil in 1944 (Hallenbeck and Ghosh 2009), Rhodobacter sphaeroides, the origin is named Rhodopseudomonas sphaeroides, has become the bioenergetic center of several laboratories in the world. R. sphaeroides is a nontoxic photosynthetic bacterium. It can to acquire energy through several methods. It has, therefore a great interest since it naturally produces a very large number of photosynthetic membranes, and consequently large quantities of membrane unicellular proteins.