Lo, H., Chiang, C., Tsao, H., Pai, T., Liu, M., Kurniawan, T., Chao, K., Liou, C., Lin, K., Chang, C., Wang, S., Banks, C.J., Lin, C., Liu, W., Chen, P., Chen, C., Chiu, H., Wu, H., Chao, T., Chen, Y., Liou, D. and Lo, F. (2012) Effects of spiked metals on the MSW anaerobic digestion. Waste Management & Research, 30 (1), 32-48. (doi:10.1177/0734242X10383079).
Abstract
This study aimed to investigate the effects of eight metals on the anaerobic digestion of the organic fraction of municipal solid waste (OFMSW) in bioreactors. Anaerobic bioreactors containing 200?mL MSW mixed completely with 200?mL sludge seeding. Ca and K (0, 1000, 2000 and 6000?mg?L?1) and Cr, Ni, Zn, Co, Mo and W (0, 5, 50 and 100?mg?L?1) of various dose were added to anaerobic bioreactors to examine their anaerobic digestion performance. Results showed that except K and Zn, Ca (~728 to ~1461?mg?L?1), Cr (~0.0022 to ~0.0212?mg?L?1), Ni (~0.801 to ~5.362?mg?L?1), Co (~0.148 to ~0.580?mg?L?1), Mo (~0.044 to ~52.94?mg?L?1) and W (~0.658 to ~40.39?mg?L?1) had the potential to enhance the biogas production. On the other hand, except Mo and W, inhibitory concentrations IC50 of Ca, K, Cr, Ni, Zn and Co were found to be ~3252, ~2097, ~0.124, ~7.239, ~0.482, ~8.625?mg?L?1, respectively. Eight spiked metals showed that they were adsorbed by MSW to a different extent resulting in different liquid metals levels and potential stimulation and inhibition on MSW anaerobic digestion. These results were discussed and compared to results from literature.
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