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1、Characteristics of odor pollution near landfill siteLU Peng1 YU Changkang1 WANG Guiqin1 DAI Zhifeng1* CHEN Wei1 REN Limei2Beijing, China(1.Beijing environmental sanitation engineering research institute, Beijing, China, 100028； 2. MSW landfill of Chao Yang District, Beijing, China, 100018)e-mail add
2、ress:AbstractOdor released from landfill is one serious point sources of air pollution in urban place that damages the surrounding environment, injures peoples health, induces villagers angrily and is not easy to be resolved. Sampling points near landfill and its ambient villages were selected at di
3、fferent direction from the central of landfill site. During one week observation period, odor concentration, ammonia and sulfide hydrogen are checked at different time every day. The results show the odor concentration has vibrate fluctuation between day and night during observation period. Neither
4、sulfide hydrogen and ammonia concentration has remarkable relationship with odor concentrations. Odor pollution is serious in night than that of in daytime at landfill area. Odor protection distance from landfill boundary should be more than 500m by analyzing the reduction regular of odor concentrat
5、ion in the research. Keywords- landfill; odor; diffusion; regularI. Introduction Large-scale industrial enterprises move out of Beijing Administrative Region to achieve the city planning and construction. Sanitation facilities, faraway from the center of the city, are surrounded by residential area
6、now. Its negative influence on city air environment became more seriously and was taken extremely concerned by municipal government.Odor pollution all occur in every steps of municipal solid waste (MSW) treatment process, such as collection, transportation and final disposal. Much odorous materials
7、are incomplete decomposition products that produced in anaerobic conditions. These materials including a lot of sulfur or nitrogen based compounds, like thiols, sulfides or amines, and much of it has toxic characterization 1-3. In China, more than 90% of municipal solid waste (MSW) was taken to sani
8、tary landfill. At that place, odor pollution and other seriously environment problem occurred. In landfill area, the intensity of odor pollution has significant seasonal variation and the composition the unpleasant smell materials were analyzed by scholars 4-6. But the dynamic of odor pollution chan
9、ges during 24 hours of a day was rarely reported. Odor protection distance of landfill area generally according to practical experience because its pollution influence distance from landfill boundary was not very clear. The research was to detect the pollution changing regular of whole day and the i
10、nfluenced distance from landfill boundary to ambient area. II. Materials and MethodsA. Testing sitesA large of municipal solid waste sanitary landfill was selected at the east of Beijing, which include one first phase bury area and one second phase bury area covered 30hm2 and 16.5hm2 respectively. T
11、he MSW pill is mounted to 40 meters in designed and it can accept 2000 tons of garbage per day continually for 17 years and contain 12 million m3 MSW during lifetime. Several villages at different directions neared the landfill (Fig.1) were selected in the scope of 600 meters distance from landfill
12、boundary. According to the main wind direction was northwest during testing period, testing results at open space near Xiaotuncun village were used as background values. The center of village A is about 476 meters from the east boundary of landfill. The center of village B is about 500 meters from t
13、he south boundary of landfill. Village C is on the north direction of landfill. Because village A and village B is on the down wind direction, 5 testing points are selected on the odor dispersion direction at different distance near the villages. Point 1 is on the boundary, other four monitoring sit
14、es are selected according to its relative position from landfill center to the village. Here includes the site between the village and landfill (point 2), the site in front of the village to landfill (point 3), the site in the center of village (point 4) and the site behind the village (point 5, the
15、 furthest position to landfill site).B. Analyzing method* Corresponding author:Sponsor: Key Laboratory for Solid Waste Management and Environment Safety, Ministry of Education of China, Tsinghua University, 100084 Beijing, China, No. SWMES 2009-12Air samples at every point were collected respectivel
16、y from November 24 to Dismember 1 of 2006. Samples collected three times in one day that at 4:00am, 12:00 am and 10:00 pm respectively. The whole monitoring period prolong to 7 days (172 hours). The samples of ammonia and sulfureted hydrogen in environmental air were collected by auto environmental air collector (type KB-6120, Beijing central western Ltd.). Sample of ammonia concentrations w
