Variation of Several Indexes in Fermentation Process of Blue Algae

Several indexes in the fermentation process of blue algae fermented in two ways(separate fermentation,blue algae with rice straw mixed fermentation) at 35 ℃ were compared for their differences and correlations.There was significant difference between treatments in gas production and pH values.In a certain period of fermentation,the COD was significantly different from gas production,and gas production showed a positive relation with VFA.From the variations of biogas volume,pH,VFA,alkalinity and COD,the effect of blue-algae and rice straw as raw material in fermentation was better than that of blue-algae as raw material alone.