Abstract
Experimental studies on biogas yield of Ulva pertusa were carried out at different fermentation conditions. At 25°C, 35°C and 45°C, the biogas yield from fermentation of Ulva pertusa were 223.2mL/gVS, 256.2mL/gVS and 300.0mL/gVS,respectively, while the methane content in the biogas produced at 35°C was the highest. In addition, biogas yield reached to 482.5mL/gVS and 499.6mL/gVS by adding waste paper of 3.5g and 7.0g to the fermentation liquor, the corresponding methane content in the biogas were 56.0% and 51.2%, respectively. Comparatively, higher biogas yield, methane content and system stability could obtain from Ulva pertusa by adding 3.5g ~ 7.0g of waste paper and fermentation at 35°C.The fermentation process of Ulva pertusa for biogas production generally lasted for 19~25 days.
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