A.(如水绵)CO2+2H2O [CH2O]+O2+H2O
B.(如:红硫细菌)CO2+2H2S [CH2O]+2S+H2O
C.(如:硝化细菌)2NH3+3O2 2HNO2+2H2O+66kj
2NHO2+O2 2HNO3+180kj
nCO2+2nH2O+841kj [CH2O]n+nO2+nH2O.