Study On The Correlation Between The Burning Of Municipal Solid Waste And The Respiratory Symptoms In Nearby People

Background:With the development of industrialization and urbanization in our country, more and more solid waste is generated during material production and consumption. And it attracts the public attention that how to effectively deal with the waste.The treatment methods include landfilling and composting. With the advantage of harmless during high temperatures, volume reduction and weight loss, waste incineration technology has been rapidly developed and become a trend. But waste incinerations may let out air pollutant when they are operating. It has caused certain panic all over the public. However, there are little researches reporting the relationship between waste incineration and residents’health risk. Study of waste incineration is mainly concentrated in health outcomes, such as cancer incidence and mortality currently. While respiratory symptoms are more sensitive indicator to air pollution. Taking researches about emission of waste incineration and respiratory symptoms correlation study can reflect the influence of the waste incineration to resident respiratory health. However, there are still no consistent conclusion about residents living waste incineration and respiratory health effects. And through the literature search found that there is no related research in our country.And lacking comprehensive and systematic health risk assessment quantitative research. The results can’t fully explain that the waste incineration impact to the health of residents, So public health departments can’t fully explain the waste incineration will impact to the health of people.So it is necessary to do a research on municipal waste incineration emissions of air pollutant to see the correlation between respiratory symptoms and waste incineration. The results will lay the foundation of further researches.Objective:Do a survey of the incidence respiratory symptoms in the different exposure area resident. And exploring the correlation between the waste incineration and residents’ respiratory symptoms. The result can provide clues of waste incineration relationship between pollution and resident’s respiratory health.Besides, the results also can provide objective of the health risk assessment data to the public.It help people to understand the impact of waste incineration scientifically. It also can relieve of the public panic sentiment. There will be important practical significance in the field of social environment and health field.Methods:By using the method of comparative study of ecological, selecting a certain representative municipal waste incineration southern China as a research field. Taking the objects’ unit address and waste incinerators distance as the index of exposure, and regarding the average exposure level as exposure levels. The incinerators under the direction of the wind direction within 10 km area is divided into less than 5 km and over than 5 km in two different exposure area.Then taking epidemiological investigation on the respiratory health of residents in the area. The survey content includes:① The basic social characteristics of the objects:Gender, Age, Educational level, Occupation and Economic status.②Potential confounding factors:Smoking, Chronic disease and the distance between residence and the nearest traffic road.③ Respiratory symptoms:Incidence of cough, sputum, nasal discomfort, sore throat,asthma and chest tightness information. Primarily we use Chi-square test to compare the incidence of respiratory symptoms in different exposure of residents. Secondly using logistic regression control potential confounding factors to analysis the correlation between the waste incineration exposure intensity and respiratory symptoms.Results:1、The basic social characteristics of the objects:1043 research objects have been surveyed 10 km range area near the municipal waste incinerator,506 subjects during the 0-5km area and 537 subjects during the 5-10km area. There are 533 male and 510 female.2、The incidence of respiratory symptoms:The incidence of sore throat in 0-5km and 5-10km region are 41.70% and 31.47%,chest symptoms are 22.53% and 16.76%.There was significant difference in different distance region (P<0.05). The incidence of any respiratory symptoms is 72.73% in 0-5km higher than 65.55% in 5-10km region, there was also significant difference (P<0.05).While resident near the waste incinerator 0-5km,the incidence of cough, sputum,nasal discomfort and asthma symptoms during recent years are 36.17%、29.64%、32.81% and 7.91% respectively. And the incidence of resident during 5-10km are 37.06%、27.75%、27.37% and 6.33%, there is no significance (P>0.05).3% The degree of the influence between residents respiratory health effects and waste incineration:Analysis the result after adjusting for potential confounding factors (smoking, the distance to the traffic road, chronic diseases, etc.), The results showed the odd ratio of residents’sore throat is 1.422 times in 0-5km than 5-10km (OR=1.422,95%CI:1.096-1.846), there is significant;any respiratory symptoms is 1.332 times in 0-5km than 5-10km (OR=1.332,95%CI:1.016-1.746), While there is no significant in chest tightness(OR=1.353,95%CI:0.988-1854).There is no significant impact on the incidence of respiratory symptoms in living life in the area.Conclusion:The study results show that residents incidence of sore throat symptoms near the incinerators 0-5 km (41.70%) little higher than 5-10 km (31.47%). But there is no significant in cough, sputum, nasal discomfort, asthma and chest tightness. Because the research used the ecological comparison study, regard group explosion level as individual level, comparing between the population average exposure level and the frequency of the disease. It may indicates some correlation between respiratory symptoms and waste incinerator. But it can’t confirm the cause-and-effect relationship. There need to take further research to confirm the relationship between waste incinerator and respiratory health.