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随着城市的发展,我国城市餐厨垃圾产生量增加迅速。将物质流与情景分析方法相结合,构建了城市餐厨垃圾循环利用的物质流分析框架与评价指标体系,并以苏州市为例,对其餐厨垃圾循环利用情况进行评价与预测。研究结果表明:2013年苏州市的餐厨垃圾正规回收率为45%,餐厨垃圾资源化利用率为28.23%,餐厨垃圾利润率为91.32元/吨,正规渠道回收处理的每吨餐厨垃圾二次污染物排放量为0.7177吨,餐厨垃圾的正规收运能力、资源化处理技术、二次污染控制能力亟需提高;在餐厨垃圾产生量增长慢情景、基准情景、快情景下2020年苏州市餐厨垃圾的正规回收率都迅速提高,快情景达到91.67%,比基准情景和慢情景高了4.46%和10.37%,餐厨垃圾正规收运能力的增长速度快于餐厨垃圾产生量的增长速度;在假定技术水平不变的条件下,2020年再生物质产量在快情景、基准情景、慢情景下分别是2013年的3.3倍、3倍、2.7倍。
With the development of the city, the amount of food waste in our city increases rapidly. Combining material flow with scenario analysis, this paper constructs a material flow analysis framework and evaluation index system for urban kitchen waste recycling, and takes Suzhou as an example to evaluate and predict the recycling of kitchen waste. The results show that: the formal reclamation rate of kitchen waste in Suzhou was 45% in 2013, the resource utilization rate of kitchen trash was 28.23%, the profit rate of food waste was 91.32 yuan / ton, the reclaimed tonnage The discharge of waste secondary pollutants is 0.7177 tons, the regular collection and transport capacity of kitchen waste, resource treatment technology, secondary pollution control capacity needs to be improved urgently; in the slow growth of food waste generation situation, the baseline scenario, fast scene In 2020, the regular recovery rate of kitchen waste in Suzhou rapidly increased with 91.67% in the fast-track scenario, 4.46% and 10.37% higher than the baseline and slow scenarios, and the normal capacity of food waste collection and delivery increased faster than that of the kitchen garbage The growth rate of the output of renewable biomass will be 3.3 times, 3 times and 2.7 times of that of 2013 in the fast scenario, the baseline scenario and the slow scenario in 2020, assuming the same technical level.