Optimization of biomethanization processes through trace metals supplementation

摘要

AD substrates contain insuffient amount of trace elements Ni, Co, Se, Mo with Co and Se being most limiting. Ni, Co, Se or Mo requirements depend on VFA concentration or loading rate and process temperature; supplementation based on VFAs concentration is most effective. Mesophilic systems are more succeptible to TM deficiency than thermophilic systems; and trace elements increase the cataytic potential and substrate affinity in mesophilic system but only substrate affinity in thermophilic. Outlook: 1. Continuous system: TMs speciation and influence of Ni, Co, Se, Mo on changes in microbial population.