This paper proposes the use of modified biochar, derived from Sawdust (SD) biomass using sonication (SSDB) and Ozonation (OSDB) processes, as an additive for biogas production from green algae Cheatomorpha linum (C. linum) either individually or co-digested with natural diet for rotifer culture (S. parkel). Brunauer-Emmett-Teller (BET), Fourier-Transform Infrared (FTIR), thermal-gravimetric (TGA), and X-ray diffraction (XRD) analyses were used to characterize the generated biochar. Ultrasound (US) specific energy, dose, intensity and dissolved ozone (O₃) concentration were also calculated. FTIR analyses proved the capability of US and ozonation treatment of biochar to enhance the biogas production process. The kinetic model proposed fits successfully with the data of the experimental work and the modified Gompertz models that had the maximum R² value of 0.993 for 150 mg/L of OSDB. The results of this work confirmed the significant impact of US and ozonation processes on the use of biochar as an additive in biogas production. The highest biogas outputs 1059 mL/g VS and 1054 mL/g VS) were achieved when 50 mg of SSDB and 150 mg of OSDB were added to C. linum co-digested with S. parkle.

本文建议使用改性生物炭，使用超声处理 (SSDB) 和臭氧化 (OSDB) 工艺从锯末 (SD) 生物质中提取生物炭，作为单独或共消化的绿藻Cheatomorpha linum ( C. linum ) 生产沼气的添加剂用天然饲料培养轮虫（S. parkel）。Brunauer-Emmett-Teller (BET)、傅里叶变换红外 (FTIR)、热重分析 (TGA) 和 X 射线衍射 (XRD) 分析用于表征生成的生物炭。超声波 (US) 特定能量、剂量、强度和溶解臭氧 (O ₃) 浓度也进行了计算。FTIR 分析证明了美国和臭氧处理生物炭以增强沼气生产过程的能力。所提出的动力学模型成功地与实验数据和修改后的 Gompertz 模型相吻合，该模型对于 150 mg/L 的 OSDB 具有 0.993 的最大R ²值。这项工作的结果证实了美国和臭氧化过程对使用生物炭作为沼气生产添加剂的重大影响。当将 50 mg SSDB 和 150 mg OSDB 添加到与S. parkle共消化的C. linum时，实现了最高沼气输出（1059 mL/g VS 和 1054 mL/g VS） 。