城市居民小区湿垃圾理化特性研究

Study on Physicochemical Characteristics of Wet Waste from Urban Residential Areas

选择上海市区5个居民小区湿垃圾堆放点,每月采样2次。结果显示,塑料制品、纸制品残留检出批次高,检出频率达到65%,48%,说明小区湿垃圾品质还有待进一步提升。居民小区杂质率月度差异较大,秋冬季节杂质率含量较高,夏季杂质率含量较低。居民小区湿垃圾含水分较高,平均值为83.5%,脂肪含量平均值为2.41%,有机质平均含量12.8%,含盐量为0.69%,氮、磷、钾含量平均值分别为0.49%,76.4 mg/100 g,196 mg/100 g。为居民小区湿垃圾资源化利用提供参考。

Selecting five urban residential areas in Shanghai in 2020,wet waste was collected twice a month.The results showed that the detection rate of plastic products and paper products was 65%and 48%,which was very high.Indicating that the quality of wet waste in the community needed to be further improved.The monthly difference of the impurity content was large.And the impurity content in autumn and winter was much higher than which was in summer.The wet waste from residential areas had fairly high water content of about 83.5%on an average.Fat content was 2.41%.Organic matter content was 12.8%.Salt content was 0.69%.The average contents of total nitrogen,total phosphorus and total potassium content were 0.49%,76.4 mg/100 g and 196 mg/100 g.It provides reference for the utilization of wet waste resources in the community.