Efficient and economical production of polyhydroxyalkanoate from sustainable rubber wood hydrolysate and xylose as co-substrate by mixed microbial cultures
文献类型： 外文期刊
作者： Li, Jianing 1 ; Li, Dongna 2 ; Su, Yuhang 3 ; Yan, Xu 2 ; Wang, Fei 2 ; Yu, Lili 2 ; Ma, Xiaojun 1 ;
作者机构： 1.Chinese Acad Trop Agr Sci, Rubber Res Inst, Key Lab Biol & Genet Resource Utilizat Rubber Tree, State Key Lab Breeding Base Cultivat & Physiol Tro, Danzhou 571737, Peoples R China
2.Tianjin Univ Sci & Technol, Coll Light Ind Sci & Engn, Tianjin 300457, Peoples R China
3.Fujian Polytech Normal Univ, Coll Mat & Environm Engn, Fuqing 350300, Peoples R China
关键词： Polyhydroxyalkanoates; Rubber wood hydrolysate; Activated sludge; Xylose; Microbial screening
期刊名称：BIORESOURCE TECHNOLOGY （ 影响因子：11.889； 五年影响因子：11.139 ）
ISSN： 0960-8524
年卷期： 2022 年 355 卷
页码：
收录情况： SCI
摘要： Using co-substrate to accumulate polyhydroxyalkanoate (PHA) is an efficient approach to reduce production cost and improve yield of PHA. In the study, PHA was biosynthesized under full aerobic mode by using rubber wood hydrolysate and xylose co-substrate as the carbon source. The effects of co-substrate on PHA production, microbial community and carbon conversion were explored. The results showed that proper addition of xylose was beneficial for the synthesis of PHA and monomer 3-hydroxyvalerate (3HV). Higher conversion yield of substrate to-PHA (YPHA/S) of 0.933 g COD PHA/g COD S and PHA content of 43.6 g PHA/100 g VSS were gained at co substrate ratio of 1:1. Likewise, under this condition, PHA production also reached the highest value of 1849 mg COD/L (1088 mg/L). Moreover, the addition of xylose created a favorable screening of PHA dominant strains, improved the conversion of carbon source, and saved 72.3% of feedstock consumption.
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