Biochemical Methane Potential and Kinetic Parameters of Goat Manure at Various Inoculum to Substrate Ratios
Biochemical Methane Potential and Kinetic Parameters of Goat Manure at Various Inoculum to Substrate Ratios
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DOI：
10.3390/su132212806
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发表时间：
2021-11
期刊：
影响因子：
3.9
通讯作者：
H. Kaur;R. Kommalapati
中科院分区：
文献类型：
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作者：
H. Kaur;R. Kommalapati
厌氧消化是一种成熟的技术，用于管理粪便，同时收获天然气和沼气作为生物肥料。研究了不同接种量与基质比（ISR）条件下山羊粪（GM）的生化甲烷势（BMP）、生物降解性及动力学参数。在ISR为0.0、0.3、0.5、0.8、1.1、1.3和2.6时，累积生物甲烷产量分别为191.7、214.3、214.9、225.9、222.1、222.8和229.9 mL gvs−1。在所有ISR下的生物甲烷产率显著高于对照（0 ISR）。在ISR为0.0以上，生物甲烷产率在所有ISR中相似。在ISR为0.3、0.5、0.8、1.1、1.3和2.6时，GM的生物降解性在73.3%和78.7%之间变化，并且在统计学上相似。总的来说，在对照和所有其他ISR中分别在31天和32天内观察到90%的产量。修正的Gompertz方程与GM的BMP拟合得很好（R2 = 0.99），但预测的滞后期（λ）为3.2-5.2天，而对照和其他ISR的滞后期为8-10天。
Anaerobic digestion is a proven technology for managing manure while harvesting natural gas and digestate as a biofertilizer. The biochemical methane potential (BMP), biodegradability, and kinetic parameters of goat manure (GM) were investigated at different inoculum to substrate ratios (ISRs). The cumulative biomethane yields at the ISRs of 0.0, 0.3, 0.5, 0.8, 1.1, 1.3, and 2.6 were 191.7, 214.3, 214.9, 225.9, 222.1, 222.8, and 229.9 mL gvs−1, respectively. The biomethane yield at all ISRs was significantly higher than control (0 ISR). Above the ISR of 0.0, the biomethane yield was similar among all ISRs. The biodegradability of GM at the ISRs of 0.3, 0.5, 0.8, 1.1, 1.3, and 2.6 varied between 73.3% and 78.7% and was statistically similar. In total, 90% of the yield was observed in 31 and 32 days in control and all other ISRs, respectively. The modified Gompertz equation fitted very well (R2 = 0.99) to the BMP of GM but predicted the lag phase (λ) of 3.2–5.2 days against observed 8–10 days among control and other ISRs.