Composting is an effective and economic technology for the recycling of organic waste. In this study, bean dregs (BD) (at 0, 35, and 45%) and crab shell powder (CSP) (at 0, 15, and 25%) were evaluated as additives during the two-stage composting of green waste (GW). The GW used in this experiment mainly consisted of branch cuttings collected during the maintenance of the urban green landscape. Combined additions of BD and CSP improved composting conditions and compost quality in terms of composting temperature, specific surface area, average pore diameter, pH and EC values, carbon dioxide release, ammonia and nitrous oxide emissions, E₄/E₆ ratio, elemental composition and atomic ratios, organic matter degradation, microbial numbers, enzyme activities, compost phytotoxicity, and environmental and economic benefits. The combined addition of 35% BD and 25% CSP to the two-stage composting of GW resulted in the highest quality compost product in only 22 days.

堆肥是一种有效且经济的技术，可以回收有机废物。在这项研究中，豆渣（BD）（分别为0、35和45％）和蟹壳粉（CSP）（分别为0、15和25％）在绿色废物的两阶段堆肥过程中被评估为添加剂（ GW）。本实验中使用的GW主要由维护城市绿色景观期间收集的枝条组成。在堆肥温度，比表面积，平均孔径，pH和EC值，二氧化碳释放，氨气和一氧化二氮排放量，E ₄ / E ₆方面，BD和CSP的组合添加改善了堆肥条件和堆肥质量。比例，元素组成和原子比，有机物降解，微生物数量，酶活性，堆肥的植物毒性以及环境和经济效益。在GW的两阶段堆肥中，将35％的BD和25％的CSP加在一起，可在22天内获得最高质量的堆肥产品。