Abstract
In recent years, more than one million tons of sewage sludge has been discharged annually in Beijing. The rate of sewage sludge treatment was less than 50% in 2010. Untreated sewage sludge has critically polluted the waterways. The purpose of this paper is to analyze the impact of sewage sludge treatment on the development of the regional economy and on the environment. In this report, we use Lingo software to simulate an economic model and an environmental model with an input-output table and perform a linear optimization of these models. The economic model describes the relationship between economic activities and the emission of water pollutants. The environmental model describes the change in the amount of water pollutants that are generated in the model. Beijing is divided into 11 sub-regions. A comprehensive environmental policy is coupled with the introduction of advanced technology to reduce water pollutants. Based upon the results of the simulation, we can provide detailed information about economic growth, water pollutant reduction, policy subsidies and the number of new sewage and sewage sludge plants needed in each sub-region.
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