Abstract: In this paper，we determined the cellulose content of kelp residue and took it as raw material for production of cellulosic ethanol. The methods of pretreatment and fermentation was preliminarily established by experiments. The degradation of kelp residue by low temperature cellulose enzyme QP7 was investigated. Cellulose content of kelp residue was 28.3%. After pretreatment with dilute acid，ethanol productivity by saccharification and fermentation was higher than that of cornstalk under the same conditions. For simultaneous saccharification and fermentation with kelp residue as raw material，by adding some low temperature cellulose enzyme as component of mixed enzyme，ethanol production increased by more than 21%. Experiments showed good prospect of application of using kelp residue as raw material to produce ethanol and a new direction for comprehensive utilization of kelp industry. The data could provide reference for development of other algal biomass energy.

Key words: kelp residue, cellulose, dilute acid, ethanol, low temperature cellulose enzyme

摘要： 对海带渣中的纤维成分进行了测定，并以海带渣为原料进行了发酵产纤维素乙醇的研究。通过实验初步建立了海带渣生产乙醇的预处理方法并确立了发酵方式，同时对南极低温纤维素酶QP7复配降解海带渣生产乙醇的效果进行了研究。实验结果表明，海带渣中纤维素含量达28.3%；稀酸预处理后，海带渣经分步糖化发酵得到的乙醇浓度高于相同条件下的秸秆乙醇浓度；在海带渣同步糖化发酵中以低温纤维素酶作为复配酶进行酶解，乙醇产量提高21%以上。海带渣作为生产纤维素乙醇的原料，具有良好的应用前景；既能为海带产业的综合利用提供新方向，而且能够为其它海藻的生物质能源开发提供数据和方法参考。

关键词: 海带渣, 纤维素, 稀酸, 乙醇, 低温纤维素酶