Development of a new cleaner production process for cassava ethanol

doi:10.1016/j.cjche.2016.10.002

›› 2017, Vol. 25 ›› Issue (4): 493-498.DOI: 10.1016/j.cjche.2016.10.002

• Biotechnology and Bioengineering • 上一篇下一篇

Development of a new cleaner production process for cassava ethanol

Ke Wang, Xinchao Yang, Xidong Ren, Jianhua Zhang, Zhonggui Mao

The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China

收稿日期:2016-07-05 修回日期:2016-09-22 出版日期:2017-04-28 发布日期:2017-06-03
通讯作者: Ke Wang, Xidong Ren
基金资助:
Supported by the National Natural Science Foundation of China (21506075),the Natural Science Foundation of Jiangsu Province (BK20150131) and the Fundamental Research Funds for the Central Universities (JUSRP51504).

Development of a new cleaner production process for cassava ethanol

Ke Wang, Xinchao Yang, Xidong Ren, Jianhua Zhang, Zhonggui Mao

The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China

Received:2016-07-05 Revised:2016-09-22 Online:2017-04-28 Published:2017-06-03
Supported by:
Supported by the National Natural Science Foundation of China (21506075),the Natural Science Foundation of Jiangsu Province (BK20150131) and the Fundamental Research Funds for the Central Universities (JUSRP51504).

摘要/Abstract

摘要： A new cleaner production process for cassava ethanol has been developed,in which the thin stillage by-product was treated initially by anaerobic digestion,and the digestate further processed by hydrogen-form cation exchange resin before being recycled as process water to make mash for the next ethanol fermentation batch.Thus wastewater was eliminated and freshwater and energy consumption was significantly reduced.To evaluate the new process,ten consecutive batches of ethanol fermentation and anaerobic digestion at lab scale were carried out.Average ethanol production in the recycling batches was 11.43%(v/v) which was similar to the first batch,where deionized (DI) water was used as process water.The chemical oxygen demand (COD) removal rate reached 98% and the methane yield was 322 ml per gram of COD removed,suggesting an efficient and stable operation of the anaerobic digestion.In conclusion,the application of the new process can contribute to sustainable development of the cassava ethanol industry.

关键词: Cassava ethanol fermentation, Waste water, Anaerobic digestion, Digestate, Methane, Recycle

Abstract: A new cleaner production process for cassava ethanol has been developed,in which the thin stillage by-product was treated initially by anaerobic digestion,and the digestate further processed by hydrogen-form cation exchange resin before being recycled as process water to make mash for the next ethanol fermentation batch.Thus wastewater was eliminated and freshwater and energy consumption was significantly reduced.To evaluate the new process,ten consecutive batches of ethanol fermentation and anaerobic digestion at lab scale were carried out.Average ethanol production in the recycling batches was 11.43%(v/v) which was similar to the first batch,where deionized (DI) water was used as process water.The chemical oxygen demand (COD) removal rate reached 98% and the methane yield was 322 ml per gram of COD removed,suggesting an efficient and stable operation of the anaerobic digestion.In conclusion,the application of the new process can contribute to sustainable development of the cassava ethanol industry.

Key words: Cassava ethanol fermentation, Waste water, Anaerobic digestion, Digestate, Methane, Recycle

Ke Wang, Xinchao Yang, Xidong Ren, Jianhua Zhang, Zhonggui Mao. Development of a new cleaner production process for cassava ethanol[J]. , 2017, 25(4): 493-498.

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Development of a new cleaner production process for cassava ethanol

Development of a new cleaner production process for cassava ethanol

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