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Improving hydrogen recovery from anaerobic co-digestion of algae and food waste by high-pressure homogenisation pre-treatment
Environmental Chemistry Letters ( IF 15.7 ) Pub Date : 2021-04-15 , DOI: 10.1007/s10311-021-01234-7
Mingxing Zhao , Jin Xu , Hanguang Xue , Chao Li , He Liu , Sai Gu , Hengfeng Miao , Wenquan Ruan

Lake algae can be digested anaerobically to produce hydrogen (H2), but the efficiency of actual processes is limited. Improving the hydrogen yield could be done by hydrolysis and tuning nutrients. Here, we pre-treated Taihu lake algae by high-pressure homogenisation; then, this product was co-digested with food waste for hydrogen recovery. Results showed that the average particle size of algae decreased to 65.48 μm after 60 MPa pre-treatment, which is 43.09% smaller than that the control. The disintegration degree rose from 1.54% to 23.13%, and the soluble chemical oxygen demand rose from 3.21 g/L to 11.20 g/L in wet algae after 100 MPa pre-treatment. The maximum hydrogen yield was 39.87 mL per g of volatile solids. The pre-treatment effect on hydrogen generation performance was not significant when the pressure exceeded 60 MPa. Overall, we observed that high-pressure homogenisation is a fast and efficient method for algae pre-treatment, thus promoting anaerobic co-digestion of wet algae and food waste for hydrogen bio-recovery.



中文翻译:

通过高压均质化预处理提高藻类和食物残渣厌氧共消化中的氢气回收率

可以厌氧消化藻类湖以产生氢(H 2),但实际流程的效率是有限的。可以通过水解和调节养分来提高氢气产量。在这里,我们通过高压匀浆对太湖藻类进行了预处理。然后,将这种产品与食物残渣共同消化以回收氢。结果表明,60 MPa预处理后藻类平均粒径降至65.48μm,比对照组小43.09%。100 MPa预处理后,湿藻中的崩解度从1.54%增加到23.13%,可溶性化学需氧量从3.21 g / L增加到11.20 g / L。每克挥发性固体的最大氢产量为39.87 mL。当压力超过60 MPa时,预处理对制氢性能的影响不明显。全面的,

更新日期:2021-04-15
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