Prediction and reduction measures of domestic solid waste emission in Beijing, Shanghai, Nanjing and Guangzhou，China

Abstract

Correct management of domestic waste in Chinese cities is one of most important factors for local urban environment. Quantitative data about the amount of domestic waste in Beijing, Shanghai, Nanjing and Guangzhou from 2009 to 2017 were collected. The projection of the domestic waste in the 4 cities in the future by the multiple regression analysis indicates that the total amount of domestic waste in Beijing, Shanghai, Nanjing and Guangzhou will reach 13 million tons, 13 million tons, 6 million tons and 7.5 million tons in 2027, respectively. In order to examine the reduction of domestic waste, it is necessary to investigate and analyze the reasons for the continuous increase of the amount of waste. A field investigation of domestic waste was conducted in Nanjing. The result indicates that the residents discharge various kinds of waste together without sorted collection. The separate waste collection system is still at the pilot stage in Nanjing as well as Beijing, Shanghai and Guangzhou, which is one of the main reasons for the increase of waste. The questionnaire indicated the people would reduce the waste in Beijing, if the collection fee like Japanese system would be innovated. The amount of domestic waste was projected when the collection fee is innovated. The results show that about 600,000 tons of waste per year will be reduced in Beijing.