High value-added chemical production through anaerobic codigestion of corn straw with a microbial consortium, cow manure and cow digestion solution

被引：2

作者：

Amin, Farrukh Raza ^{[1
,2
,3
]}

Khalid, Habiba ^{[1
,2
,4
]}

Wang, Jingjing ^{[1
,2
]}

Li, Yaxiang ^{[1
,2
]}

Ma, Longxue ^{[1
,2
]}

Chen, Wuxi ^{[1
,2
]}

Duan, Yu ^{[1
,2
]}

Zhai, Yida ^{[1
,2
]}

Li, Demao ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Tianjin Inst Ind Biotechnol, 32 West 7th Ave,Tianjin Airport Econ Area, Tianjin 300308, Peoples R China

[2] Natl Innovat Ctr Synthet Biol, Tianjin 300308, Peoples R China

[3] COMSATS Univ Islamabad, Dept Chem, Pk Rd, Islamabad 45550, Pakistan

[4] Wroclaw Univ Environm & Life Sci, Dept Appl Bioecon, PL-50375 Wroclaw, Poland

来源：

ANAEROBE | 2024年 / 89卷

关键词：

Corn straw; Cow manure; Cow digestion solution; Strain consortium; High value-added chemicals; 16S rRNA gene sequencing; METHANE PRODUCTION; ACID PRODUCTION; WASTE; PRETREATMENT; COMMUNITY; STOVER; FERMENTATION; HYDROLYSIS; REACTOR;

D O I：

10.1016/j.anaerobe.2024.102900

中图分类号：

Q93 [微生物学];

学科分类号：

071005 ; 100705 ;

摘要：

Objectives: This study investigated the codigestion of corn straw (CS) with cow manure (CM), cow digestion solution (CD), and a strain consortium (SC) for enhanced volatile fatty acid (VFA) production. The aims of this study were to develop a sustainable technique to increase VFA yields, examine how combining microbial reagents with CS affects VFA production by functional microorganisms, and assess the feasibility of improving microbial diversity through codigestion. Methods: Batch experiments evaluated VFA production dynamics and microbial community changes with different combinations of CS substrates with CM, CD, and SC. Analytical methods included measuring VFAs by GC, ammonia and chemical oxygen demand (COD) by standard methods and microbial community analysis by 16S rRNA gene sequencing. Results: Codigesting CS with the strain consortium yielded initial VFA concentrations ranging from 0.6 to 1.0 g/L, which were greater than those of the other combinations (0.05-0.3 g/L). Including CM, and CD further increased VFA production to 1.0-2.0 g/L, with the highest value of 2.0 g/L occurring when all four substrates were codigested. Significant ammonium reduction (194-241 mg/L to 29-37 mg/L) and COD reduction (3310-5250 mg/L to 730-1210 mg/L) were observed. Codigestion with CM and CD had greater Shannon diversity indices (3.19-3.24) than did codigestion with the other consortia (2.26). Bacillota dominated (96.5-99.6 %), with Clostridiales playing key roles in organic matter breakdown. Conclusions: This study demonstrated the feasibility of improving VFA yields and harnessing microbial diversity through anaerobic codigestion of lignocellulosic and animal waste streams. Codigestion substantially enhanced VFA production, which was dominated by butyrate, reduced ammonium and COD, and enriched fiber-degrading and fermentative bacteria. These findings can help optimize codigestion for sustainable waste management and high-value chemical production.

引用

页数：10