蓝藻猪粪共发酵产沼气及动力学研究

Study on the Production and Dynamics of Methane Production by Co-fermentation of Blue-Green Algae and Pig Manure

对蓝藻与猪粪分批混合发酵进行了研究。结果表明,猪粪与蓝藻总固体(TS)质量比例在3∶7时产气效果最好,发酵最佳初始pH为8.0。在整个反应中,产沼气潜力分别为175 mL/g、546 mL/g、560 mL/g,发酵出料中总氮含量为2.2 g/L,总磷含量为0.14 g/L,未检出藻毒素,可以作为肥料使用。对发酵的生化产沼气潜力(BMP)的研究结果表明,最终甲烷产量B0为302.5 mL/g,反应速率常数k为0.144 d-1,整个产甲烷的过程与Cheynoweth方程的相关系数R2为0.976 7,能够用Cheynoweth方程较好反映蓝藻与猪粪混合产甲烷的规律。

A laboratory scale study was performed on the batch anaerobic digestion of blue-green algae and pig manure using multi-reactor system to compare the methane production from these substrates. The results showed that the optimum proportional of pig manure and blue-green algae was 3 ： 7 and pH was 8.0. The highest biogas production was achieved at 175 mL/g, 546mL/g and 560 mL/g.（此处中文的意思就比较难以理解.可能需要再检查一下.）After anaerobic digestion, the content of total nitrogen （TN） and total phosphorus （TP） was E. 2 g/L and 0.14 g/L, respectively. No microcystin was detected in the digested product, this indicated that the product could be used as fertilizer. The results obtained in the biochemical methane potential （BMP） tests showed that the final methane yield （B0） was 302.5 mL/g and the reaction rate constant （k） was 0. 144 d^-1. The methane production process was highly correlated to the Cheynoweth equation （R^2=0. 976 7）, which indicated that the BMP of pig manure and blue-green algae could be described using the equation （B=BO（1-e^-Kt）