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Management and valorization of waste from a non-centrifugal cane sugar mill via anaerobic co-digestion: Technical and economic potential.
Bioresource Technology ( IF 9.7 ) Pub Date : 2020-08-06 , DOI: 10.1016/j.biortech.2020.123962
O Mendieta 1 , L Castro 2 , J Rodríguez 3 , H Escalante 4
Affiliation  

The main sugarcane wastes from the non-centrifugal cane sugar (NCS) agro-industry, agricultural crop residue (ACR) and sugarcane scum (SCS), were used to produce biogas in a bench-scale semi-continuous anaerobic tubular digester. A two-stage strategy was proposed to achieve the appropriate operability and stability of the digester. In the first stage, the operability of the digester was achieved with ACR mono-digestion. In the second stage, the digester feed was changed until it reached an ACR:SCS ratio (co-digestion) of 75:25, based on volatile solids, and until stability was achieved. The strategy was successful, and specific biogas production of 0.132 m3 kg-1VS with a methane content of 50.4% was achieved, confirming the technical feasibility of the process. Economic viability was established through a case study at a typical NCS mill. Therefore, anaerobic co-digestion can be consolidated as a technological alternative for the treatment of ACR+SCS and the sustainable benefit of the NCS agro-industry.



中文翻译:

通过无氧共消化,对非离心式甘蔗糖厂的废物进行管理和估价:技术和经济潜力。

非离心式蔗糖(NCS)农用工业,农作物残余物(ACR)和甘蔗渣(SCS)的主要甘蔗废物被用于在台式规模的半连续厌氧管式消化器中生产沼气。提出了一个两阶段策略来实现蒸煮器的适当的可操作性和稳定性。在第一阶段,通过ACR单消化实现蒸煮器的可操作性。在第二阶段中,更改消化器进料,直到达到基于挥发性固体的75:25的ACR:SCS比(共消化)为止,直至达到稳定性。该策略是成功的,沼气生产量为0.132 m 3 kg -1甲烷含量为50.4%的VS证实了该工艺的技术可行性。通过在典型的NCS工厂进行案例研究来确定经济可行性。因此,厌氧消化可以合并为ACR + SCS处理和NCS农药工业的可持续利益的技术替代品。

更新日期:2020-08-06
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