堆肥产物综合评价及用于南海岛礁珊瑚砂土改良的可行性

Comprehensive Evaluation of Compost Products and the Feasibility for Coral Sand Soil Improvement in South China Sea Islands and Reefs

有机固体废弃物的堆肥产物对改善土壤的理化性质具有重要作用。南海岛礁内珊瑚砂土理化性质欠佳,营养元素匮乏。通过对厨余垃圾-粪渣-剩余污泥的共堆肥产物进行无害化效果和养分水平评价,指出堆肥产物具有较高的腐熟度、卫生防疫安全性和较高的营养价值,但产物中总镉、总汞和总锌的含量分别达到1.77,1.98和553.73 mg/kg,而超出相关标准中最严一级指标,因此应控制堆肥施用量不高于50%。

The compost product of organic solid waste plays an important role in improving the physical,chemical ana biological properties of soil.The physicochemical properties of coral sand soil in south china sea islands and reefs are fairly poor and its nutrient elements are scarce.In this paper,the harmless effect and nutrient level of the co-composted products of kitchen waste-feces-sludge were evaluated.The results showed that the compost was of high maturity, epidemic prevention safety and nutritional value.But the total cadmium,mercury and zinc in the compost reached 1.77, 1.98and 553.73mg/kg,respectively,which exceeded the most stringent level in relevant standards,thus the using amount of compost should be controlled no more than 50%.