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Study on Air Environmental Capacity and Total Control of Regional Atmospheric Organic Pollutants

Author: PanYiYi
Tutor: HeYunFeng
School: Zhejiang University
Course: Environmental Engineering
Keywords: Total Control AERMOD model Atmospheric capacity Yun ideal displacement Actual allow displacement Pollution Reduction Prevention and control measures
CLC: X51
Type: Master's thesis
Year: 2011
Downloads: 158
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Abstract

Regional atmospheric environment capacity to formulate regional atmospheric science goal of total control, rational use of limited resources and improving the capacity of the atmospheric environment quality of atmospheric environment of a basic work; optimal allocation based on environmental capacity to understand the changes in production and development of air pollutants The basic rules for implementing the scientific concept of development, the implementation of urban industrial structure adjustment and optimization of the layout, build a resource-saving and environment-friendly society, has important practical significance. Based Haining Agricultural Foreign Comprehensive Development Zone (referred to agricultural development zone) of the natural environment, meteorological characteristics, atmospheric pollution environmental function zoning and distribution of basic information, the use of pollution load method to determine the characteristics of organic pollutants in the atmosphere of toluene and ethyl acetate . By comparing the old and new guidelines recommended model, AERMOD more advantages and practicality; using this model to simulate pollutant concentrations characteristic values, the establishment of toluene and ethyl acetate were monitored and predicted values ??of the correlation curves were y = 0.8322x0.826, R2 = 0.8319; y = 0.8546x0.8941, R2 = 0.7478 (y: monitor value, x: predictive value); wherein the monitored values ??and simulated values ??of correlation coefficients were above 0.6, we can see the model prediction of these two types of pollutants is feasible. Application AERMOD model spatial and temporal distribution of pollutants found in each of toluene and ethyl acetate were when sensitive points, and the average daily high values ??of the first seriously overweight, where high values ??of toluene daily first accounted for at all sensitive points Standard rate range of 5.83% -479.95% 115.08% -16401.44% ethyl acetate, ethyl acetate, toluene relatively more pollution. According to the study area to determine the control points surrounding environment, and the introduction of population density parameter analysis of each control point on the sensitivity of the concentration distribution, which stars Harbour (Agricultural Development Zone) most sensitive point is defined as the key control points. A values ??using the method to estimate the ideal atmosphere of toluene and ethyl acetate capacity, of which 12 enterprises and 11 toluene emissions ethyl ideal for allowing exhaust emissions of total enterprises were 526.29t / a and 65.0t / a, binding function area, businesses GDP contribution rate of the regional economy and the status of implementation of cleaner production and other factors, will be the ideal capacity assigned to each enterprise. Use of urban multi-source model (AERMOD model) allows for an ideal displacement for approval to ensure that the reference under controlled conditions (control point concentration of pollutants per year ambient air quality standard ratio of the number of days above 97%) concentration standards, determine the enterprise toluene and ethyl acetate were actually allowed total discharge 514.09t / a and 59.723t / a. Compare industrial pollution discharge value and the actual situation allowed to make a mandatory emissions reduction program; combined regional enterprise protection policies proposed reduction programs focused view of Zhejiang integrity Packing Co. on key control points toluene and ethyl acetate pollution contribution rate at 97% more focused on determining the reduction target enterprise, the enterprise toluene low frame source reduction amount 157.25t / a, ethyl acetate, the amount of low-frame source reduction 870.84t / a. Reduction programs for both from a technical and economic point of feasibility analysis, found that reduction programs focus more reasonable. From the whole concept of clean production process control, industrial layout optimization and total control policies and other aspects of the status quo of toluene and ethyl acetate pollution prevention and control measures accordingly. Finally, progress in the foundation subjects are summarized in data collection, field investigations and other aspects of the model itself, this paper proposes the corresponding outlook.

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