Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Science, China Agricultural University, Beijing 100193, China.
Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Science, China Agricultural University, Beijing 100193, China.
Waste Manag. 2018 Jul;77:333-340. doi: 10.1016/j.wasman.2018.04.016. Epub 2018 Apr 26.
This study investigated the performance of co-biodrying sewage sludge and organic fraction of municipal solid waste (OFMSW) at different proportions. Cornstalk was added at 15% (of total wet weight) as the bulking agent. Results show that increasing OFMSW percentage promoted the biodegradation of organic matter, thus enhancing the temperature integration value and water removal to above 75% during sludge and OFMSW co-biodrying. In particular, adding more OFMSW accelerated the biodegradation of soluble carbohydrates, lignins, lipids, and amylums, resulting in more organic loss and thus lower biodrying index (3.3-3.7 for 55-85% OFMSW). Water balance calculation indicated that evaporation was the main mechanism for water removal. Heat used for water evaporation was 37.7-48.6% of total heat consumption during co-biodrying. Our results suggest that sludge and OFMSW should be mixed equally for their efficient co-biodrying.
本研究探讨了不同比例的污水污泥与城市固体废物有机部分（OFMSW）共生物处理的性能。玉米秸秆以 15%（总湿重）的比例作为膨胀剂添加。结果表明，随着 OFMSW 比例的增加，促进了有机物的生物降解，从而提高了温度集成值，使污泥和 OFMSW 共生物处理过程中的水分去除率高于 75%。特别是添加更多的 OFMSW 会加速可溶性碳水化合物、木质素、脂质和淀粉的生物降解，导致更多的有机损失，从而使生物干燥指数降低（55-85%OFMSW 的生物干燥指数为 3.3-3.7）。水平衡计算表明，蒸发是去除水分的主要机制。在共生物处理过程中，用于水蒸发的热量占总热量消耗的 37.7-48.6%。我们的结果表明，为了实现高效共生物处理，污泥和 OFMSW 应均匀混合。
