Surfactant‐supplemented mixed bacterial cultures to produce hydrogen from paperboard mill wastewater
作者： Ahmed Farghaly , Ahmed Tawfik , Mona Gamal Eldin Ibrahim
关键词: Anaerobic digestion 、 Hydrogen production 、 Chemical oxygen demand 、 Biochemistry 、 Enzymatic hydrolysis 、 Wastewater 、 PEG ratio 、 Food science 、 Chemistry 、 Propionate 、 Biodegradation
摘要: Paperboard mill wastewater (PMW) mainly comprises complex compounds such as polysaccharides and lignin that are recalcitrant to microbial enzymatic action. Surfactants supplementation was found improve the hydrolysis reduce content during anaerobic digestion process. However, much less attention has been given for effectiveness of surfactants addition on hydrogen production from PMW under hyperthermophilic conditions. In this study, mixed bacterial culture supplemented with surfactants, namely PEG 6000 Tween 80 (T80), enhance biodegradation process yield (HY). The results showed increasing concentration T80 0.25 1.75% v/v significantly (p < 0.001) increased HY 1.7 ± 0.02 2.6 0.01 mmol/gCODinitial (where COD is chemical oxygen demand), respectively. further increase in up 2.5%, dropped 2 0.04 mmol/gCODinitial. This due a higher propionate (HPr) production. Similar trends were observed PEG, where maximum 2.8 achieved at 0.75 mg/L, which deteriorated lower concentrations PEG. Fermentative 700 m3/day could support about 16.4% total primary energy consumption factory.
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