Combined sulphur cycle based system of hydrogen production and biological treatment of wastewater.
The experiment was conducted to investigate continuous hydrogen production with lower cost and sulphate-rich wastewater treatment. In this paper, both anaerobic bio-treatment of sulphate-rich wastewater and hydrogen production were applied to construct a laboratory-scale combined sulphur cycle based system. The system consisted of two reactors, which were a photocatalytic reactor and an anaerobic bioreactor, respectively. In the anaerobic bioreactor, sulphate-reducing bacteria (SRB) converted SO4(2-) to S(2-). The produced S(2-) yielded by SRB was further used as a sacrificial reagent to produce H2 in the photocatalytic reactor. Then, S(2-) was changed into SO4(2-), which returned to the anaerobic bioreactor for treatment again. The present study highlighted an advantage compared with the conventional method, in that no extra S(2-) was added to the photocatalytic reactor, which reduced the total cost and realized continuous hydrogen production. The average COD removal efficiency was 79.6%.
Hua
Li Wei
LW
State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an, People's Republic of China.
Lei
Lei
L
Ningbo
Yang
Y
Wei
Yan
Y
D019149:Bioreactors / Q000382:microbiology*; D006859:Hydrogen / Q000378:metabolism*; D013455:Sulfur / Q000378:metabolism*; D016999:Sulfur-Reducing Bacteria / Q000378:metabolism; D014865:Waste Disposal, Fluid / Q000295:instrumentation / Q000379:methods*
D013455:Sulfur; D006859:Hydrogen