Composting is an efficient technology to reduce pathogenic bodies and stabilize the organic matter in organic wastes. This research work investigates an effect of biochar as amendment to improve the composting efficiency and its effect on degradation kinetics, physical and nutritional properties. Biochar (2.5, 5 and 10% (w/w)) were added into a mixture of , cow dung and sawdust having ratio of 8:1:1 (control), respectively. Biochar addition resulted in advanced thermophilic temperatures (59 °C) and could improve the physical properties of composting process. Owing to addition of 5% biochar as a bulking agent in composting mixture, the final product from composting, total nitrogen increased by 45% compared to the other trials, and air-filled porosity decreased by 39% and was found to be within recommended range from literature studies. Considering temperature, degradation rate and nitrogen transformation the amendment of 5% biochar is recommended for composting.

中文翻译：

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用于富氮有机废物批量堆肥的生物炭改良剂：对降解动力学、堆肥物理和营养特性的影响


堆肥是减少有机废物中病原体、稳定有机物的有效技术。这项研究工作探讨了生物炭作为改良剂提高堆肥效率的效果及其对降解动力学、物理和营养特性的影响。将生物炭（2.5%、5% 和 10%（w/w））分别添加到比例为 8:1:1（对照）的牛粪和锯末的混合物中。添加生物炭可提高高温温度（59°C），并可以改善堆肥过程的物理特性。由于在堆肥混合物中添加了 5% 生物炭作为填充剂，堆肥最终产品的总氮比其他试验增加了 45%，充气孔隙率降低了 39%，处于推荐范围内来自文学研究。综合考虑温度、降解率和氮转化情况，建议添加5%生物炭进行堆肥。