摘要
选取广州市猎德污水处理厂进行为期4 d的现场采样,采用PFPH衍生化-GC/MS联用技术分析恶臭挥发性羰基化合物的组成特征和含量水平,研究它们的排放特征.结果表明,在该污水处理厂共检测出18种羰基化合物,其中具有恶臭气味的组分包括15种,它们在6个处理车间的浓度范围为0.39~19.92μg·m-3,总浓度均值为(68.66±10.05)μg·m-3.采取归一化方法获得了该类污染源的恶臭挥发性羰基化合物成分谱,并发现了分子标志物为甲醛、乙醛、丙醛、2-丁酮、丁醛和己醛,它们占该成分谱总含量的78.91%,其中己醛含量最高,浓度均值达到11.71μg·m-3.应用恶臭面源源强的计算方法,估算出该污水处理厂恶臭挥发性羰基化合物的年排放总量为2 302.33 kg·a-1,各车间的排放量贡献率由高至低为:生化池>浓缩池>A级曝气池>提升泵房>沉砂池>脱水机房.由于污水处理厂的恶臭污染排放过程较为复杂,因此在一定程度上影响了排放量估算的准确度.
A 4-day field observation was conducted at Liede sewage treatment plant in Guangzhou,using PFPH/GC/MS method to analyse the composition and the concentration of volatile carbonyl compounds,and investigate the source emission characteristics of the pollutants.The results were as follows: 18 carbonyl species were detected,which including 15 malodorous volatile carbonyls with a concentration range from 0.39 μg·m-3 to 19.92 μg·m-3 at six processing units.Mean value of the total malodorous volatile carbonyls was(68.66±10.05) μg·m-3.Normalization data process was used to research the source emission profile for malodorous volatile carbonyls,formaldehyde,acetaldehyde,propionaldehyde,2-butanone,butyraldehyde and hexaldehyde were found to be molecular markers of the source emission with their percentage of total carbonyls up to 78.91%.Hexaldehyde was the most abundant carbonyl species with an average concentration of 11.71 μg·m-3.Using a calculation model of area source emission,it estimated that the total annual emissions of the municipal sewage treatment plant was 2 302.33 kg·a-1,and the contribution ratio of each processing unit was in an order of biochemical reaction basin,concentration basin,grade A aeration,ascending pump room,grit basin,dewatering house.The malodorous emission of sewage treatment plant is affected by many complex factors,so there's some uncertainty on the estimate.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2011年第12期3571-3576,共6页
Environmental Science
基金
国家自然科学基金项目(40975077)
广州市环境保护局科技项目
广州市水务局科技项目
环境模拟与污染控制国家重点联合实验室(北京大学)开放课题项目
关键词
城市污水处理厂
挥发性羰基化合物
恶臭污染
分子标志物
挥发性有机物
源排放
municipal sewage treatment plant
carbonyl-containing volatile organic compounds
malodor
molecular marker
volatile organic compounds
source emissions