不同磷酸盐浓度对厌氧颗粒污泥发酵产氢的影响研究

实验以高浓度有机废水为发酵底物,接种颗粒污泥进行厌氧发酵制氢,研究不同磷酸盐浓度条件下的产氢效果。结果表明:当磷酸盐的浓度为6 mmol.L-1～8 mmol.L-1时,对有机废水制氢具有促进作用,在浓度为8mmol.L-1时,氢气含量为56.3%达到最大。随着磷酸盐浓度的增加,化学需氧量(COD)去除率和出水挥发性脂肪酸(VFA)浓度也逐步提高,但当磷酸盐浓度升至10 mmol.L-1时,由于进水营养比例失衡,产氢产乙酸菌群的活性受到抑制,产气率也因此减少。

Influence of Different Phosphate Concentrations on Hydrogen Production by Anaerobic Granular Sludge

The experiments were carried out to study the fermentative bio-hydrogen production by granular sludge under conditions of different phosphate concentrations with high concentrated organic wastewater as fermentation substrate.The results showed that,the phosphate under concentration of 6 mmol·L-1 ~ 8 mmol·L-1 had a catalytic effect on hydrogen production.The maximum hydrogen content of 56.3% was appeared at phosphate concentration of 8 mmol·L-1.The phosphate concentration,COD removal rate and effluent VFA concentrations gradually increased with the increase of phosphate concentration.But hydrogen production decreased when the phosphate concentration reached to 10 mmol·L-1,due to the imbalance of nutrition and the activity of hydrogen-producing acetic bacteria was inhibited.