What gases are produced in anaerobic sludge
digesters?
(a) Methane and CO2 only
(b) Methane, Hydrogen sulphide and CO2
(c) Methane, Hydrogen sulphide and O2
(d) Hydrogen sulphide and CO2
digesters?
(a) Methane and CO2 only
(b) Methane, Hydrogen sulphide and CO2
(c) Methane, Hydrogen sulphide and O2
(d) Hydrogen sulphide and CO2