金属离子及表面活性剂对秸秆发酵产沼气的影响

Effect of metal ions and surfactant addition on biogas productiong

通过测定产气量、发酵后料液的pH值及辅酶F420的浓度、TS和VS的降解率来评价金属离子及表面活性剂对秸秆发酵产沼气的影响。结果表明,添加100μmol/LMg2+或Co2+对产沼气有促进作用,添加0.125%(质量分数,下同)的吐温80有助于产气量的进一步提高,但加入1.25%的吐温80时,沼气产量反而降低。组合添加100μmol/LMg2+和0.125%的吐温80后,发酵液的pH值更接近中性。添加100μmol/LMg2+或Co2+对发酵液中辅酶F420的浓度影响不大。

Effect of two metal ions and surfactant additives on biogas production using stalk as raw material was investigated. The influence of additives on biogas fermentation was evaluated by biogas production, pH value variation, concentration of co-enzyme F420 and TS ,VS degradation. The results showed that 100 μmol/L Mg2＋ or Co2＋ addition dosage could improve biogas production, further addition of 0.125% Tween 80 could increase the biogas production, but, addition of 1.25% Tween 80 could decrease the biogas production. The dosage of 100 μmol/L Mg2＋ and 0.125% Tween 80 addition would lead the fermentation broth pH to a neutral value. It showed that there is no deference on co-enzyme F420 concentration for the addition of Mg2＋ or Co2＋.