Aili Hamzah Adila Fazliyana, Hamzah Muhammad Hazwan, Che Man Hasfalina, Jamali Nur Syakina, Siajam Shamsul Izhar, Ismail Muhammad Heikal
Department of Biological and Agricultural Engineering, Universiti Putra Malaysia, 43400, UPM Serdang, Selangor, Malaysia.
Smart Farming Technology Research Centre, Universiti Putra Malaysia, 43400, UPM Serdang, Selangor, Malaysia.
Heliyon. 2023 Jun 1;9(6):e16791. doi: 10.1016/j.heliyon.2023.e16791. eCollection 2023 Jun.
Organic loading influences the effectiveness of producing biogas through anaerobic digestion. This study set out to investigate the effect of organic loading on the anaerobic mesophilic digestion of cow dung, the parameters involved in the digestion process and to evaluate the kinetics. Anaerobic digestion of cow dung at different organic loading (gVS/L) of 14 gVS/L, 18gVS/L, 22 gVS/L, 26 gVS/L and 30 gVS/L were investigated. Increasing the organic loading increased the methane yield of the cow dung. The highest cumulative methane yield was observed at 30 gVS/L with 63.42 mL CH/gVS while the highest biogas yield was reported at 192.53 mL/gVS with the highest methane content of 89%. In addition, the modified Gompertz model equation with an R of 0.9980 demonstrated strong consistency and a good fit between predicted and experimental data. The high number of substrates added to the systems when increasing the organic loading increased the λ and slow down the nutrient transport and hydrolysis. This study provides current information on the effects of organic loading on the anaerobic digestion of cow dung in batch mode, including experimental conditions and operational parameters.
有机负荷会影响通过厌氧消化生产沼气的效率。本研究旨在调查有机负荷对牛粪厌氧中温消化的影响、消化过程中涉及的参数并评估动力学。研究了在14 gVS/L、18gVS/L、22 gVS/L、26 gVS/L和30 gVS/L不同有机负荷（gVS/L）下牛粪的厌氧消化情况。增加有机负荷会提高牛粪的甲烷产量。在30 gVS/L时观察到最高的累积甲烷产量，为63.42 mL CH/gVS，而最高的沼气产量为192.53 mL/gVS，甲烷含量最高达89%。此外，修正的Gompertz模型方程的R值为0.9980，表明预测数据与实验数据之间具有很强的一致性和良好的拟合度。增加有机负荷时添加到系统中的底物数量增多，会增加λ并减缓养分传输和水解。本研究提供了关于有机负荷对间歇模式下牛粪厌氧消化影响的当前信息，包括实验条件和操作参数。
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