宁波市不同区分类垃圾组成与理化特性研究

为了对分类垃圾制定合理的处理方案,对宁波市主城区分类垃圾和处理终端的垃圾物理组成和理化特性进行了为期1年的研究.结果表明,生活垃圾中厨果类、纸类、橡塑类所占比例分别为50.63%、20.92%、15.70%,平均容重为145.10 kg·m~(-3),各区的平均湿基低位热值为8049.57kJ·kg~(-1);农贸市场、餐厨垃圾处理厂、焚烧厂、填埋场中厨果类分别占比77.34%、63.85%、58.17%、58.19%,平均容重分别为204.93、250.33、269.16、268.07 kg·m~(-3);厨果类含量春季较低,夏季较高,含水率为68.95%,碳氮比(C/N)为18.16,淀粉含量为9.08%,粗蛋白含量为13.41%,粗脂肪含量为9.33%.宁波市主城区生活垃圾分类初见成效,其他垃圾适合焚烧,厨余垃圾适合生化处理.

Composition and physicochemical properties of classified municipal solid waste in different districts of Ningbo City

In order to develop adequate strategies for disposal of classified municipal solid waste (MSW), the composition and physical-chemical characteristics of classified MSW from major disposal terminals of Ningbo city were studied. The results showed that the proportion of kitchen waste, paper, rubber and plastic in the MSW were 50.63%, 20.92% and 15.70%, respectively, with an average bulk density of 145.1 kg·m^-3 and an average wet base calorific value of 8050 kJ·kg^-1. The kitchen and fruit waste accounted for 77.34% in agricultural market, 63.85% in kitchen waste treatment plant, 58.17% in the incineration plant and 58.19% in the landfill were, with a bulk density of 205, 250, 269 and 268 kg·m^-3, respectively. The kitchen and fruit waste proportion was lower in spring and higher in summer. It had average water content of 68.95%, C/N 18.16, crude protein content 13.41%, starch content 9.08%, and crude fat content 9.33%. These results indicate that it is useful to classify municipal solid wastes, as the kitchen waste is suitable for biochemical treatments, whereas the remaining MSW is more adequate for incineration.