<Tr> <Td> sulfur respiration (sulfur reduction) </Td> <Td> facultative anaerobes and obligate anaerobes </Td> <Td> sulfur S </Td> <Td> sulfide HS </Td> <Td> - 0.27 </Td> <Td> Desulfuromonadales </Td> </Tr> <Tr> <Td> acetogenesis (carbonate reduction) </Td> <Td> obligate anaerobes </Td> <Td> carbon dioxide CO </Td> <Td> acetate </Td> <Td> - 0.30 </Td> <Td> Acetobacterium woodii </Td> </Tr> <Tr> <Td> dehalorespiration </Td> <Td> facultative anaerobes and obligate anaerobes </Td> <Td> halogenated organic compounds R-X </Td> <Td> Halide ions and dehalogenated compound X + R-H </Td> <Td> + 0.25--+ 0.60 </Td> <Td> Dehalococcoides and Dehalobacter species </Td> </Tr>

Aerobic respiration uses oxygen as its final electron acceptor