The addition of
DECA from car manufacturing to sewage sludge anaerobic digesters
could be a significant additional source of methane. Inhibition of
sewage sludge digestion by 75 mg/L Zn2þ yielded up to 2.4 mol of
H2/mole of glucose whereas no hydrogen was produced when
DECA was used as the substrate, indicating that this wastewater
may not be suitable for biohydrogen production under heavy metal
ion inhibition.