The study investigates the potential of anaerobic co-digestion(AcoD)as a sustainable solution for managing putrescible organic waste generated by leather processing.Three experiments were conducted to assess the impac...The study investigates the potential of anaerobic co-digestion(AcoD)as a sustainable solution for managing putrescible organic waste generated by leather processing.Three experiments were conducted to assess the impact of various tannery wastes,pretreatment methods,and waste combinations on methane production.Experiment 1 demonstrated that co-digesting tannery wastewater primary sludge(TWPS)and fleshings significantly increased methane yield compared to digesting TWPS alone,though the addition of chromium-and vegetable-tanned leather wastes decreased yield.Experiment 2 explored TWPS pretreatment methods and found that ultrasonic pretreatment increased soluble chemical oxygen demand(SCOD)but did not significantly improve methane yield,suggesting that pretreatment may not be necessary.Experiment 3 revealed that increasing the proportion of fleshings to TWPS resulted in higher methane yield,ranging from 226.52 mL/gVS with 6%fleshings to 395.71 mL/gVS and 538.34 mL/gVS with 12%and 20%of fleshings,respectively.Additionally,this increase in fleshings also led to a reduction in digester volume.These findings highlight the importance of AcoD in addressing both environmental and eco-nomic challenges in the leather industry.展开更多
基金supported by Sanyo Leather Co.,Ltd.We also acknowledge the financial assistance provided by the Grant-in-Aid for JSPS Fellows under Grant Numbers 19F19106 and 22KF0257.
文摘The study investigates the potential of anaerobic co-digestion(AcoD)as a sustainable solution for managing putrescible organic waste generated by leather processing.Three experiments were conducted to assess the impact of various tannery wastes,pretreatment methods,and waste combinations on methane production.Experiment 1 demonstrated that co-digesting tannery wastewater primary sludge(TWPS)and fleshings significantly increased methane yield compared to digesting TWPS alone,though the addition of chromium-and vegetable-tanned leather wastes decreased yield.Experiment 2 explored TWPS pretreatment methods and found that ultrasonic pretreatment increased soluble chemical oxygen demand(SCOD)but did not significantly improve methane yield,suggesting that pretreatment may not be necessary.Experiment 3 revealed that increasing the proportion of fleshings to TWPS resulted in higher methane yield,ranging from 226.52 mL/gVS with 6%fleshings to 395.71 mL/gVS and 538.34 mL/gVS with 12%and 20%of fleshings,respectively.Additionally,this increase in fleshings also led to a reduction in digester volume.These findings highlight the importance of AcoD in addressing both environmental and eco-nomic challenges in the leather industry.
