Boğaziçi University, Institute of Environmental Sciences, 34342, Bebek-, Istanbul, Turkey.
Environ Sci Pollut Res Int. 2019 Dec;26(35):35411-35421. doi: 10.1007/s11356-019-05190-2. Epub 2019 May 20.
The wastewater sludge stabilization by anaerobic digestion is sufficient to reduce the organic content of the sludge, so that it can be safely disposed of without causing odor problems and pathogen contamination, while producing energy in form of biogas. Efficiency of anaerobic digestion in terms of biogas/methane production and organic removal can be enhanced by pretreating the sludge prior to anaerobic digestion. This study compares the effects of microwave (MW), combined hydrogen peroxide/microwave (HO/MW), and combined hydrogen peroxide/heat (HO/heat) pre-treatments on the digestion efficiency and methane production potential of wastewater sludges. The methane productions were also estimated by using modified Gompertz equation through the calculation of the kinetic parameters. The pre-treatments applied to sludge samples speeded up the hydrolysis step and improved the biodegradability of the organics by increasing their solubility. Application of MW, combined HO/MW, and combined HO/heat pre-treatments increased the methane yields by 64%, 38%, and 19%. The modified Gompertz model fitted well to the experimental results (R of 0.999, 0.983, 0.997, and 0.998 for control, MW, HO/MW, and HO/heat, respectively).
厌氧消化可使废水污泥稳定化，足以降低污泥中的有机物含量，从而可以安全处置，而不会产生异味问题和病原体污染，同时还能以沼气的形式产生能源。在进行厌氧消化之前对污泥进行预处理，可以提高沼气/甲烷生成和有机物去除的厌氧消化效率。本研究比较了微波（MW）、过氧 化氢/微波（HO/MW）和过氧化物/热（HO/heat）联合预处理对废水污泥消化效率和甲烷生成潜力的影响。通过计算动力学参数，使用修正的 Gompertz 方程来估算甲烷产量。应用于污泥样品的预处理加速了水解步骤，并通过提高有机物的溶解度来提高其生物降解性。MW、HO/MW 和 HO/heat 联合预处理分别提高了 64%、38%和 19%的甲烷产量。修正的 Gompertz 模型很好地拟合了实验结果（对于对照、MW、HO/MW 和 HO/heat，分别为 0.999、0.983、0.997 和 0.998）。
