厨余垃圾处理场恶臭气体的大气扩散规律分析

Analysis of Atmospheric Diffusion Law of Malodorous Gas in Kitchen Waste Disposal Site

为研究厨余垃圾处理场在处理过程中产生的恶臭气体在大气中的扩散规律,以浙江某厨余垃圾处理场为例,利用AERMOD大气预测模型输出处理场周边各网格点的浓度预测结果,绘制了污染物浓度等值线图。根据模拟结果、浓度等值线图得到最不利气象条件下各网格点及敏感目标区域的PM_(10)、硫化氢和氨的质量浓度分布情况,预测结果表明:新增污染源正常排放下污染物短期浓度贡献值的最大浓度占标率为28.86%,鉴于处理场所周边存在较多排放同类型恶臭气体的企业,若叠加背景值后,污染物短期浓度占标率可能较高,因此需持续加强区域的大气污染治理,以改善区域大气环境质量。

In order to study the diffusion law of malodor gas generated in the process of kitchen waste treatment in the atmosphere,taking a kitchen waste treatment plant in Zhejiang province as an example,the AERMOD atmospheric prediction model is used to output the concentration prediction results of grid points around the treatment plant and draw the pollutant concentration contour map.According to the simulation results and concentration contour map,the mass concentration distribution of PM_(10),hydrogen sulfide and ammonia in each grid point and sensitive target areas under the most unfavorable meteorological conditions is obtained.The prediction results show that the maximum concentration ratio of the short-term concentration contribution value of pollutants under the normal discharge of new pollution sources is 28.86%.In view of the fact that there are many enterprises discharging the same type of odor gas around the treatment site,if the background value is superimposed,the ratio of short-term concentration of pollutants to standard concentration may be high.Therefore,it is necessary to continuously strengthen regional air pollution control and improve regional air environment quality.