Co-valorization of corn cobs and dairy wastewater for simultaneous saccharification and lactic acid production: Process optimization and kinetic assessment

被引：14

作者：

David, Anthea Naomi ^{[1
]}

Sewsynker-Sukai, Y. ^{[2
]}

Kana, E. B. Gueguim ^{[1
]}

机构：

[1] Univ KwaZulu Natal, Sch Life Sci, Pietermaritzburg, South Africa

[2] Univ Ft Hare, Ft Hare Inst Technol, Private Bag X1314, ZA-5700 Alice, South Africa

来源：

BIORESOURCE TECHNOLOGY | 2022年 / 348卷

基金：

新加坡国家研究基金会;

关键词：

Lactic acid; Dairy wastewater formulated media; Corn cob waste; Simultaneous saccharification and; fermentation; LACTOBACILLUS-RHAMNOSUS; LACTATE PRODUCTION; SUGARCANE BAGASSE; L(+)-LACTIC ACID; BATCH CULTURES; STEEP LIQUOR; FERMENTATION; BIOMASS; PRETREATMENT;

D O I：

10.1016/j.biortech.2022.126815

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

This study optimized the co-valorization of corn cob wastes (CCW) and dairy wastewater for simultaneous saccharification and lactic acid (LA) production (sDWW-SSF). Subsequently, the kinetics of Lactobacillus plantarum growth and LA production was assessed using the optimized conditions under microaerophilic (sDWWSSFmicroaerophilic) and anaerobic (sDWW-SSFanaerobic) conditions, and thereafter compared to De Man, Rogosa and Sharpe (MRS) medium modified with pretreated CCW (mMRS-SSFmicroaerophilic). Optimized sDWW-SSF conditions produced maximum LA concentration and conversion of 11.15 +/- 0.42 g/L and 18.90 +/- 0.75%, respectively. Kinetic studies revealed that although the mMRS-SSFmicroaerophilic system obtained a higher maximum specific growth rate (mu max) and maximum potential LA concentration (Pm) compared to the wastewater-based bioprocesses, the data obtained for the latter were comparable when taking the resources and costs into consideration. These findings represent the potential to eliminate the use of valuable resources in lignocellulosic bioprocesses and provide insights on innovation towards driving a sustainable economy in line with the foodenergy-water nexus.

引用

页数：11

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